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product structure : silicon monolithic integrated circuit this product has no designed protection against radioactive rays 1/ 36 tsz02201 - 0f3f0aj00100 - 1 - 2 ? 20 1 7 rohm co., ltd. all rights reserved. 14.mar.2017 rev.001 tsz22111 ? 14 ? 001 www.rohm.com 2 .7v to 5.5v input, 3a integrated mosfet single synchronous buck dc/dc converter bd9a30 2qwz general description bd9a30 2qwz is a synchronous buck dc/dc converter with built - in low on - resistance power mosfets. th is ic is capable of providing current up to 3a. the sllm tm control provides excellent efficiency characteristics in light - load conditions which make the product ideal for equipment and devices that demand minimal standby power consumption. the oscillating frequency is high at 1mhz using a small v alue of induct or . BD9A302QWZ is a current mode control dc/dc converter and features high - speed transient response. phase compensation can also be set easily. features ? single synchronous buck dc/dc c onverter ? sllm tm (simple light load mode) c ontrol ? over cu rrent p rotection ? short circuit protection ? thermal shutdown p rotection ? under voltage l ockout p rotection ? ummp008az020 package (b ackside h eat d issipation) applications ? step - down power supply for dsps , fpgas, microprocessors, etc. ? laptop pcs / tablet pcs / servers ? lcd tvs ? storage devices (hdds/ssds) ? printers, oa equipment ? distributed power suppl ies , secondary power supplies key specification s ? i nput voltage range: 2.7v to 5.5v ? o utput voltage range: 0.8v to v in x 0.7v ? output current: 3a ( max ) ? switching freque ncy: 1mhz(typ) ? high - side mosfet o n -r esistance : 5 0 m (typ) ? low - side mosfet o n -r esistance : 5 0 m (typ) ? s tandby current: 0 a ( typ ) package w (typ) x d (typ) x h (max) ummp008az020 2.00mm x 2.00mm x 0.40mm typical application circuit figure 1. application circuit ummp008az020 en vin bst ith BD9A302QWZ sw mode fb vin vout gnd enable 10f 0.1f 1.5h 22f2 r 2 r 1 r ith c ith mode 0.1f datashee t
2 / 36 tsz02201 - 0f3f0aj00100 - 1 - 2 ? 20 1 7 rohm co., ltd. all rights re served. 14.mar.2017 rev.001 www.rohm.com tsz22111 ? 15 ? 001 b d 9a302qwz pin con f iguration figure 2 . pin configuration pin descriptio n s pin no. pin n ame function 1 vin power supply terminal for the switching regulator and control circuit. connecting 10f and 0.1 f ceramic capacitor s are recommended. 2 en enable terminal. turning this terminal signal l ow (0.8v or lower) forces the device to enter the shutdown mode. turning this ter minal signal h igh (2.0v or higher) enables the device. th e en terminal must be properly terminated. 3 bst terminal for bo otstrap. connect a bootstrap capacitor of 0.1f between this terminal and sw terminal. the voltage of th e bootstrap capacitor is the gate drive voltage of the h igh - s ide mosfet. 4 sw switch terminal . the sw terminal is connected to the source of the h igh - s ide mosfet and drain of the l ow - s ide mosfet. connect a bootstrap capacitor of 0.1f between the sw terminal and bst terminal. in addition, connect an inductor of 1.5h considering the direct current superimposition characteristic. 5 mode terminal for se tting switching control mode. turning this terminal signal low (0.2v or lower) forces the device to operate i n fixed frequency pwm mode. turning this terminal signal high (0.8v or higher) enables the sllm control and the mode is automatically switched betw een sllm control and fixed frequency pwm mode. do not change this terminal vo ltage during operation. 6 ith t erminal for the output of the error amplifier and the in put of the current comparator. connect phase compensation component s to this terminal. 7 fb i nverting input terminal for the error amplifier. 8 gnd ground terminal for the output stage of the switching regulator and the control circuit. - e - pad b ackside heat dissipation pad. connecting to the pcb ground plane by using multiple vias provide s excellent heat dissipation characteristics. (top view) v i n e n b s t s w g n d f b i t h m o d e 1 2 3 4 8 7 6 5 e - p a d
3 / 36 tsz02201 - 0f3f0aj00100 - 1 - 2 ? 20 1 7 rohm co., ltd. all rights re served. 14.mar.2017 rev.001 www.rohm.com tsz22111 ? 15 ? 001 b d 9a302qwz block diagra m figure 3 . block d iagram c u r r e n t s e n s e / p r o t e c t + d r i v e r l o g i c f b m o d e g n d s w v i n e n 8 2 1 7 4 3 b s t i t h u v l o s o f t s t a r t v r e f o v p s c p o s c s r q c l k e r r o r a m p l i f i e r c u r r e n t c o m p a r a t o r v i n s l o p e 6 5 v i n t s d
4 / 36 tsz02201 - 0f3f0aj00100 - 1 - 2 ? 20 1 7 rohm co., ltd. all rights re served. 14.mar.2017 rev.001 www.rohm.com tsz22111 ? 15 ? 001 b d 9a302qwz description of block s 1. vref the vref block generates the internal reference voltage. 2. uvlo the uvlo block is for u nder v oltage lockout pr otection. it will shut down the ic when the v in terminal voltage falls to 2.45v ( t yp ) or lower. the threshold voltage has a hysteresis of 100mv ( t yp ). 3. s cp after the soft start is completed and when the feedback voltage of the output voltage has fallen be low 0.4v ( t yp ) for 1ms ( t yp ), the scp stops the operation for 16ms ( t yp ) and subsequently initiates restart. 4. ovp the o ver voltage protection function (ovp) compares the fb terminal voltage with the internal reference voltage. when the fb t erminal voltage exceeds 0.88v ( t yp ) , it turn s the output mosfet s off . the output voltage returns with hysteresis after the output voltage drop s to normal operation level . 5. t sd the tsd block is for thermal protection. the thermal protection circuit shuts down the device wh en the internal temperature of ic rises to 175 ?
5 / 36 tsz02201 - 0f3f0aj00100 - 1 - 2 ? 20 1 7 rohm co., ltd. all rights re served. 14.mar.2017 rev.001 www.rohm.com tsz22111 ? 15 ? 001 b d 9a302qwz absolute maximum ratings (t a = 25c) parameter symbol rating unit input voltage v in - 0.3 to + 7 v en terminal v oltage v en - 0.3 to + 7 v mode terminal v oltage v mode - 0.3 to + 7 v voltage from gnd to bst v bst - 0.3 to + 14 v voltage from sw to bst ? v bst - 0.3 to + 7 v fb terminal v oltage v fb - 0.3 to + 7 v ith terminal v oltage v ith - 0.3 to + 7 v sw termi nal v oltage v sw - 0.3 to v in + 0.3 v storage t emperature r ange tstg - 55 to + 150 c maximum junction temperature t jmax 150 c caution 1 : operating the ic over the absolute maximum ratings may damage the ic. the damage can either be a short circuit between pins or an open circuit between pins and the internal circuitry. therefore, it is important to consider circuit protection measures, such as adding a fuse, in case the ic is operated over the absolute maximum ratings . caution 2: should by any chance the ma ximum junction temperature rating be exceeded the rise in temperature of the chip may result in deterioration of the properties of the chip. in case of exceeding this absolute maximum rating, increase the board size and copper area to prevent exceeding the maximum junction temperature rating. thermal resistance (note 1) parameter symbol thermal resistance (typ) unit 1s (note 3) 2s2p (note 4) ummp008az020 junction to ambient ja 376.0 67.8 c/w junction to top characterization parameter (note 2) jt 92.0 18.0 c/w (note 1) based on jesd 51 - 2a (still - air) (note 2) the thermal characterization parameter to report the difference between junction temperature and the temperature a t the top center of the outside surface of the component package. (note 3) using a pcb board based on jesd 51 - 3. layer number of measurement board material board size single fr - 4 114.3mm x 76.2mm x 1.57mmt top copper pattern thickness footprints and t races 70 m (note 4) using a pcb board based on jesd 51 - 5, 7. layer number of measurement board material board size thermal via (note 5) pitch diameter 4 layers fr - 4 114.3mm x 76.2mm x 1.6mmt - -pp top 2 internal layers bottom copper pattern thickness c opper pattern thickness copper pattern thickness footprints and traces 70 m 74.2mm x 74.2mm 35 m 74.2mm x 74.2mm 70 m (note 5) this thermal via connects with the copper pattern of all layers.
6 / 36 tsz02201 - 0f3f0aj00100 - 1 - 2 ? 20 1 7 rohm co., ltd. all rights re served. 14.mar.2017 rev.001 www.rohm.com tsz22111 ? 15 ? 001 b d 9a302qwz recommended operating conditions parameter symbol min typ max unit input voltage v in 2.7 - 5.5 v operating t emperature r ange topr - 40 - +85 c output c urrent i out 0 - 3 a output v oltage r ange v range 0.8 - v in x 0.7 v electrical characteristics (unless otherwise specified ta = 25c, v in = 5v, v en = 5v) para meter symbol min typ max unit conditions input supply standby supply current i stb - 0 10 a v en = gnd operating supply current i cc - 350 500 a i out = 0ma no n - switching uvlo detection voltage v uvlo1 2.35 2.45 2.55 v v in falling uvlo release voltage v u vlo2 2.425 2.55 2.7 v v in rising enable en input high level voltage v enh 2.0 - v in v en input low level voltage v enl gnd - 0. 8 v en input current i en - 5 10 a v en = 5v mode mode threshold voltage v modeh 0.2 0.4 0.8 v mode in put current i mode - 1 0 20 a v mode = 5v reference voltage, error amplifier fb terminal voltage v fb 0.792 0.8 0.808 v fb in put current i fb - 0 1 a v fb = 0.8v ith sink current i thsi 10 20 40 a v fb = 0.9v ith source current i thso 10 20 40 a v fb = 0.7v soft start tim e t s s 0.5 1.0 2.0 ms switching frequency switching frequency f osc 800 1000 1200 khz switch mosfet high s ide fet on resistance r onh - 50 100 m v bst v sw = 5v low side fet on resistance r onl - 50 100 m high side output leakage current i lh - 0 10 a n o n - switching low side output leakage current i ll - 0 10 a no n - switching scp short circuit protection detection voltage v scp 0.28 0.4 0.52 v
7 / 36 tsz02201 - 0f3f0aj00100 - 1 - 2 ? 20 1 7 rohm co., ltd. all rights re served. 14.mar.2017 rev.001 www.rohm.com tsz22111 ? 15 ? 001 b d 9a302qwz t ypical performance curves figure 6. swi t chi n g frequency vs temperature v in = 2.7v v in = 5.0v switching frequency : f osc [mhz] temperature [c] temperature : ta [c] figure 4 . standby supply current vs temperature standby supply current : i stb [a] temperature [c] v in = 2.7v v in = 5. 0 v figure 5 . operating supply current vs temperature figure 7. fb terminal voltage vs temperature fb terminal voltage : v fb [v] temperature [c] v in = 2.7v v in = 5.0v operating supply current : i cc [a] temperature [c] v in = 5.0 v v in = 2.7v 0.792 0.794 0.796 0.798 0.800 0.802 0.804 0.806 0.808 -40 -20 0 20 40 60 80 temperature [ 0 100 200 300 400 500 -40 -20 0 20 40 60 80 temperature [c] i cc [a] 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 -40 -20 0 20 40 60 80 temperature [c] i stb [a] 0.80 0.85 0.90 0.95 1.00 1.05 1.10 1.15 1.20 -40 -20 0 20 40 60 80 temperature [
8 / 36 tsz02201 - 0f3f0aj00100 - 1 - 2 ? 20 1 7 rohm co., ltd. all rights re served. 14.mar.2017 rev.001 www.rohm.com tsz22111 ? 15 ? 001 b d 9a302qwz typical performance curves - continued figure 1 0. m ode threshold voltage vs temperature v in = 5.0v mode threshold voltage : v modeh [v] temperature [c] figure 8. ith sink current vs temperature ith sink current : i t h si [a] temperature [c] v in = 2.7v v in = 5 .0v figure 9. ith source current vs temperature ith source current : i t h so [a] temperature [c] v in = 2.7v v in = 5.0v figure 1 1. m ode input current vs temperature mode input current : i mode [a] temperature [c] v mode = 2.7 v v mode = 5.0v 0 2 4 6 8 10 12 14 16 18 20 -40 -20 0 20 40 60 80 temperature [ 0.2 0.3 0.4 0.5 0.6 0.7 0.8 -40 -20 0 20 40 60 80 temperature [ 10 15 20 25 30 35 40 -40 -20 0 20 40 60 80 temperature [ 10 15 20 25 30 35 40 -40 -20 0 20 40 60 80 temperature [
9 / 36 tsz02201 - 0f3f0aj00100 - 1 - 2 ? 20 1 7 rohm co., ltd. all rights re served. 14.mar.2017 rev.001 www.rohm.com tsz22111 ? 15 ? 001 b d 9a302qwz typical performance curves - continued figure 1 3. high side fet on resistance vs temperature figure 1 4 . low side fet on resistance vs temperature figure 12. soft start time vs temperature v in = 2.7v v in = 5.0v soft start time : t ss [ms] temperature [c] figure 1 5 . uvlo detection / release voltage vs temperature high side fet on resistance : r onh >p @ temperature [c] v in = 2.7v v in = 5.0v v in = 3.3v low side fet on resistance : r onl >p @ temperature [c] v in = 2.7v v in = 5.0v v in = 3.3v uvlo threshold voltage : v uvlo1, v uvlo2 [v] temperature [c] release (v in rising) detect (v in falli ng) 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 3.0 -40 -20 0 20 40 60 80 temperature [ 0 10 20 30 40 50 60 70 80 90 100 -40 -20 0 20 40 60 80 temperature [ 0 10 20 30 40 50 60 70 80 90 100 -40 -20 0 20 40 60 80 temperature [ 0.0 0.5 1.0 1.5 2.0 -40 -20 0 20 40 60 80 temperature [
10 / 36 tsz02201 - 0f3f0aj00100 - 1 - 2 ? 20 1 7 rohm co., ltd. all rights re served. 14.mar.2017 rev.001 www.rohm.com tsz22111 ? 15 ? 001 b d 9a302qwz typical performance curves - continued figure 16 . en threshold voltage vs temperature en threshold voltage : v en [v] temperature [c] rising falling figure 17 . en input current vs temperature v i n = 5.0v v en = 5.0v en input current : i en [a] temperature [c] 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 -40 -20 0 20 40 60 80 temperature [ 0.8 1.0 1.2 1.4 1.6 1.8 2.0 -40 -20 0 20 40 60 80 temperature [
11 / 36 tsz02201 - 0f3f0aj00100 - 1 - 2 ? 20 1 7 rohm co., ltd. all rights re served. 14.mar.2017 rev.001 www.rohm.com tsz22111 ? 15 ? 001 b d 9a302qwz typical performance curves (application) efficiency [%] figure 18 . efficiency vs output current ( v in = 5v, vout = 1.8v, l = 1.5 h) mode = l mode = h v in = 5.0v v out = 1.8v output current : i out [a] efficiency [%] figure 19 . efficiency vs output current (v in = 3.3v, v out = 1.8v, l = 1.5 h) mode = l mode = h v in = 3.3 v v out = 1.8v output current : i out [a] efficiency [%] figure 20 . efficiency vs output current (v in = 5.0v, v mode = 5.0v, l = 1.5 h) v out = 3.3v v out = 1.2v v out = 1.8v v in = 5.0v output current : i out [a] 0 10 20 30 40 50 60 70 80 90 100 0.001 0.01 0.1 1 10 i out [a] efficiency [%] 0 10 20 30 40 50 60 70 80 90 100 0.001 0.01 0.1 1 10 i out [a] efficiency [%] 0 10 20 30 40 50 60 70 80 90 100 0 0.5 1 1.5 2 2.5 3 i out [a] efficiency [%]
12 / 36 tsz02201 - 0f3f0aj00100 - 1 - 2 ? 20 1 7 rohm co., ltd. all rights re served. 14.mar.2017 rev.001 www.rohm.com tsz22111 ? 15 ? 001 b d 9a302qwz typical performance curves (application) - continued figure 2 1 . start - u p waveform (v in = v en ) (v out = 1.8v, v mode = v in , r load = 0.6 ) figure 22 . shutd own waveform (v in = v en ) (v out = 1.8v, v mode = v in , r load = 0.6 ) figure 23 . start - u p waveform ( v en = 0v to 5v) (v out = 1.8v, v mode = v in , r load = 0.6 ) figure 2 4 . shutd own waveform ( v en = 5 v to 0v) (v out = 1. 8v, v mode = v in , r load = 0.6 ) v in = 5v/div v en = 5v/div v out = 1v/div v sw = 5v/div time = 1ms/div v in = 5v/div v en = 5v/div v out = 1v/div v sw = 5v/div time = 1ms/div v in = 5v/div v en = 5v/div v out = 1v/div v sw = 5v/div time = 1ms/div v in = 5v/div v en = 5v/div v out = 1v/div v sw = 5v/div time = 1ms/div
13 / 36 tsz02201 - 0f3f0aj00100 - 1 - 2 ? 20 1 7 rohm co., ltd. all rights re served. 14.mar.2017 rev.001 www.rohm.com tsz22111 ? 15 ? 001 b d 9a302qwz typical performance curves (application) - continued figure 2 5 . output voltage ripple (v in = 5v, v out = 1.8v, v mode = v in , i out = 0a) figure 2 6 . output voltage ripple (v in = 5v, v out = 1.8v, v mode = v in , i out = 3a) figure 2 7 . input voltage ripple (v in = 5v, v out = 1.8v, v mode = v in , i out = 0a) figure 2 8 . input voltage ri pple (v in = 5v, v out = 1.8v, v mode = v in , i out = 3a) v out = 20mv/div v sw = 2v/div time = 5ms/div v out = 20mv/div v sw = 2v/div time = 1s/div v in = 50mv/div v sw = 2v/div time = 5 ms/div v in = 50mv/div v sw = 2v/div time = 1s/div
14 / 36 tsz02201 - 0f3f0aj00100 - 1 - 2 ? 20 1 7 rohm co., ltd. all rights re served. 14.mar.2017 rev.001 www.rohm.com tsz22111 ? 15 ? 001 b d 9a302qwz typical performance curves (application) - continued figure 31 . load transient response i out = 0.75a - 2.25a (v in = 5v, v out = 1.8v, v mode = v in , c out = 22 f x 2 ) figure 32 . load transient re sponse i out = 0a - 3a (v in = 5v, v out = 1.8v, v mode = v in , c out = 22 f x 2 ) v out = 50mv/div time = 1ms/div i out = 1a/div v out = 50mv/div time = 1ms/div i out = 1a/div figure 29 . line regulation ( v out = 1.8v, v mode = v in , i out =3a ) input voltage : v in [v] figu re 30 . l oad regulation (v in = 5v, v out = 1.8v, v mode = v in ) output current : i out [a] -1.0 -0.8 -0.6 -0.4 -0.2 0.0 0.2 0.4 0.6 0.8 1.0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 v in [v] output voltage deviation [%] -1.0 -0.8 -0.6 -0.4 -0.2 0.0 0.2 0.4 0.6 0.8 1.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 v in [v] output voltage deviation [%]
15 / 36 tsz02201 - 0f3f0aj00100 - 1 - 2 ? 20 1 7 rohm co., ltd. all rights re served. 14.mar.2017 rev.001 www.rohm.com tsz22111 ? 15 ? 001 b d 9a302qwz application information 1. function explanatio ns (1) basic operation (a) dc/dc converter operation BD9A302QWZ is a synchronous rectifying buck dc/dc converter that achieves fast load transient response by employing current mode control system. it utilizes switching operation in pwm (pulse width modulation) mode for heav y load, while it utilizes sllm (simple light load mode) control for light load to improve efficiency. figure 3 4 . sw waveform (sllm tm co ntrol ) (v in = 5.0v, v out = 1.8v, v mode = v in , i out = 50ma) figure 3 5 . sw waveform (pwm control ) (v in = 5.0v, v out = 1.8 v, v mode = v in , i out = 1a)
16 / 36 tsz02201 - 0f3f0aj00100 - 1 - 2 ? 20 1 7 rohm co., ltd. all rights re served. 14.mar.2017 rev.001 www.rohm.com tsz22111 ? 15 ? 001 b d 9a302qwz (b) enable control the ic shutdown can be controlled by the voltage applied to the e n terminal. when v en reaches 2.0 v ( min ), the internal circuit is activated and the ic starts up. to enable shutdown control with the en terminal, the shutdown interval ( l ow level interval of en) must be set to 100s or longer. startup by en must be at the same time or after the input of power supply voltage. figure 36 . start - u p and shutd own with enable (c) s oft start when en terminal is switched high, soft start operates and the output voltage gradually rises. with the soft start fu nction, overshoot of output voltage and rush current can be prevented. the r ising time of output voltage is 1ms (typ) . figure 37. soft start timing chart e n v o u t f b 0 . 8 v x 9 0 % 1 m s ( t y p ) 0 . 8 v v e n 0 v o u t 0 s t a r t - u p v e n h v e n l t t s h u t d o w n
17 / 36 tsz02201 - 0f3f0aj00100 - 1 - 2 ? 20 1 7 rohm co., ltd. all rights re served. 14.mar.2017 rev.001 www.rohm.com tsz22111 ? 15 ? 001 b d 9a302qwz (2) protecti on the protective circuits are intended for prevention of damage caused by u nexpected accidents. do not use them for continuous protective operation. (a) short circuit protection (scp) the short circuit protection block compares the fb terminal voltage with the internal reference voltage v ref . when the fb terminal voltage has fallen below 0.4v ( t yp ) for 1ms ( t yp ), scp s tops the operation for 16ms ( t yp ) and subsequently initiates a restart. however, during start - up, s hort circuit protection does not operate even if the ic is still in the scp condition. en terminal start - up condition f b terminal short circuit protection 2.0v or higher during start - up ? 0. 4 v ( typ ) off > 0. 4 v ( typ ) off completed start - up ? 0. 4 v ( typ ) on > 0. 4 v ( typ ) off 0.8v or lower - - off figure 38 . short circuit protect ion ( scp) t iming c hart 0 . 8 v s c p t h r e s h o l d v o l t a g e : 0 . 4 v ( t y p ) s c p d e l a y t i m e 1 m s ( t y p ) s c p r e l e a s e l o w o c p t h r e s h o l d 6 . 0 a ( t y p ) v o u t f b l o w s i d e f e t g a t e h i g h s i d e f e t g a t e b u i l d - i n i c h i c c u p d e l a y s i g n a l i n d u c t o r c u r r e n t ( o u t p u t c u r r e n t ) s o f t s t a r t 1 m s ( t y p ) s c p r e s e t s c p d e l a y t i m e 1 m s ( t y p ) l o w 1 6 m s ( t y p )
18 / 36 tsz02201 - 0f3f0aj00100 - 1 - 2 ? 20 1 7 rohm co., ltd. all rights re served. 14.mar.2017 rev.001 www.rohm.com tsz22111 ? 15 ? 001 b d 9a302qwz (b) under voltage lockout protection (uvlo) the under voltage lockout protection circuit monitors the v in terminal voltage. the operation enters standby when the v in terminal voltage is 2.45v ( t yp ) or lower. the operatio n starts when the v in terminal voltage is 2.55v ( t yp ) or higher. fig ure 39 . uvlo t iming c hart (c) thermal shutdown (tsd) when the chip temperature exceeds tj = 175 ? ? v i n 0 v v o u t h i g h s i d e f e t g a t e f b s o f t s t a r t h y s t e r e s i s u v l o r e l e a s e u v l o d e t e c t i o n n o r m a l o p e r a t i o n n o r m a l o p e r a t i o n u v l o l o w s i d e f e t g a t e
19 / 36 tsz02201 - 0f3f0aj00100 - 1 - 2 ? 20 1 7 rohm co., ltd. all rights re served. 14.mar.2017 rev.001 www.rohm.com tsz22111 ? 15 ? 001 b d 9a302qwz 2. application e xample (v out =3.3v) parameter symbol value input voltage v in 5 v output v oltage v out 3.3 v switching f requency f osc 1m hz (typ) max i mum output current i o ut max 3a operating temperature range t opr - 40c to + 85 c figure 4 0 . application c ircuit table 1 . recommend ed c omponent values ( n ote 1) in order to reduce the influence of high frequency noise, mount the 0. 1 f ceramic capacitor as close as possible to the v in pin and gnd pin . ( n ote 2 ) for the capacitance of input capacitor, take temperature characteristics, dc bias characteristics, etc. into consideration to set to a minimum value of no less than 4.7 f. ( n ot e 3 ) in case capacitance value fluc tuates due to temperature characteristics, dc bias characteristics, etc. of output capacitor, loop r esponse characteristics may change . please confirm on actual equipment. when selecting a capacitor, confirm the character istics of the capacitor in its datasheet . c eramic type of capacitors is recommended for the output capacitor s . (note 4) for capacitance of bootstrap capacitor take temperature characteristics, dc bias characteristics, etc. into consider ation to set minimum value wrqrohvvwkdq) part no . value company part n ame l 1 1 h murata fdsd 0420 - h - 1 r 5 m c 1 ( note 1) 0.1 f murata grm155b11a104ma01 c 2 ( note 2 ) 10 f murata grm21bb31a106me18 c 3 - - - c 5 ( note 3 ) 22 f murata grm21bb30j226me38 c 6 ( note 3 ) 22 f murata grm21bb30j226me38 c 8 ( note 4 ) 0.1 f murata grm155b11a104ma01 c 9 2700p f murata grm 155b11h272ka01 c 10 - - - r 0 0 rohm m cr01 mzpj000 r 1 24k rohm mcr01mzpd2402 r 2 75 k rohm mcr01mzpd7502 r 3 n rohm m cr01 mzpd1802 1 2 3 4 8 7 6 5 v i n e n b s t s w g n d f b i t h m o d e c 9 c 1 c 3 v i n c 5 c 6 r 3 r 2 r 1 c 1 0 v o u t c 2 c 8 l 1 b d 9 a 3 0 2 q w z r 0 m o d e v i n e n
20 / 36 tsz02201 - 0f3f0aj00100 - 1 - 2 ? 20 1 7 rohm co., ltd. all rights re served. 14.mar.2017 rev.001 www.rohm.com tsz22111 ? 15 ? 001 b d 9a302qwz figure 42 . closed loop response i out = 1a (v in = 5v, v out = 3.3 v, l = 1.5 h, c out = 22 f x 2 ) figure 43 . load transient response i out = 0.75 a 2.25 a (v in = 5v, v out = 3.3 v, l = 1.5 h, c out = 22 f x 2 ) figure 44 . v out ripple i out = 3a (v in = 5v, v out = 3.3 v, l = 1.5 h, c out = 22 f x 2 ) v out = 1 00mv/div time = 1 ms /div i out = 1a/div v out = 50mv/div time = 2 s/div v sw = 2 v/div figure 41 . efficiency vs output current (v in = 5v, v out = 3.3 v, l = 1.5 h) mode = l mode = h v in = 5.0v v out = 3.3 v gain phase phase margin 69.8deg -80 -60 -40 -20 0 20 40 60 80 1 10 100 1000 frequency [khz] gain [db] -180 -135 -90 -45 0 45 90 135 180 phase [] 0 10 20 30 40 50 60 70 80 90 100 0.001 0.01 0.1 1 10 output current : i out [a] efficiency [%]
21 / 36 tsz02201 - 0f3f0aj00100 - 1 - 2 ? 20 1 7 rohm co., ltd. all rights re served. 14.mar.2017 rev.001 www.rohm.com tsz22111 ? 15 ? 001 b d 9a302qwz 3. application e xample (v out = 1.8 v) parameter symbol value input voltage v in 5v output v oltage v out 1.8 v switching f requency f os c 1mhz (typ) max i mum output current i o ut max 3a operating temperature range t opr - 40 c to +85c figure 4 5 . application c ircuit table 2 . recommend ed c omponent values ( n ote 1) in order to reduce the influence of high frequency noise, mount the 0.1 f ceramic capacitor as close as possible to the v in pin and gnd pin . ( n ote 2 ) for the capacitance of input capacitor, take temperature characteristics, dc bias characteristics, etc. into consideration to set to a minimum value of no less than 4.7 f. ( n ote 3 ) in case capacitan ce value fluc tuates due to temperature characteristics, dc bias characteristics, etc. of output capacitor, loop r esponse characteristics may change . please confirm on actual equipment. when selecting a capacitor, confirm the characteristics of the capacito r in its datasheet . c eramic type of capacitors is recommended for the output capacitors . (note 4) for capacitance of bootstrap capacitor take temperature characteristics, dc bias characteristics, etc. into consider ation to set minimum value to no less than ) part no . value company part n ame l 1 h murata fdsd 0420 - h - 1 r 5 m c 1 ( note 1) 0.1 f murata grm155b11a104ma01 c 2 ( note 2 ) 10 f murata grm21bb31a106me18 c 3 - - - c 5 ( note 3 ) 22 f murata grm21bb30j226me38 c 6 ( note 3 ) 22 f murata grm21bb30j226me38 c 8 ( note 4 ) 0.1 f murata grm155b11a104ma01 c 9 2700p f murata grm 155 b11h272ka01 c 10 - - - r 0 0 rohm m cr01 mzpj000 r 1 24k rohm mcr01mzpd2402 r 2 30 k rohm mcr01mzpd3002 r 3 n rohm m cr01 mzpd9101 1 2 3 4 8 7 6 5 v i n e n b s t s w g n d f b i t h m o d e c 9 c 1 c 3 v i n c 5 c 6 r 3 r 2 r 1 c 1 0 v o u t c 2 c 8 l 1 b d 9 a 3 0 2 q w z r 0 m o d e v i n e n
22 / 36 tsz02201 - 0f3f0aj00100 - 1 - 2 ? 20 1 7 rohm co., ltd. all rights re served. 14.mar.2017 rev.001 www.rohm.com tsz22111 ? 15 ? 001 b d 9a302qwz figure 4 7 . closed loop response i out = 1a (v in = 5v, v out = 1.8 v, l = 1.5 h, c out = 22 f x 2 ) figure 4 8 . load transient response i out = 0.75 a 2.25 a (v in = 5 v, v out = 1.8 v, l = 1.5 h, c out = 22 f x 2 ) figure 4 9 . v out ripple i out = 3a (v in = 5v, v out = 1.8 v, l = 1.5 h, c out = 22 f x 2 ) v out = 1 00mv/div time = 1 ms /div i out = 1a/div v out = 50mv/div time = 2 s/div v sw = 2 v/div gain phase phase margin 70.6deg figure 4 6 . efficiency vs o utput current (v in = 5v, v out = 1.8 v, l = 1.5 h) mode = l mode = h v in = 5.0v v out = 1.8 v output current : i out [a] -80 -60 -40 -20 0 20 40 60 80 1 10 100 1000 frequency [khz] gain [db] -180 -135 -90 -45 0 45 90 135 180 phase [] 0 10 20 30 40 50 60 70 80 90 100 0.001 0.01 0.1 1 10 i out [a] efficiency [%]
23 / 36 tsz02201 - 0f3f0aj00100 - 1 - 2 ? 20 1 7 rohm co., ltd. all rights re served. 14.mar.2017 rev.001 www.rohm.com tsz22111 ? 15 ? 001 b d 9a302qwz 4. application e xample (v out =1.5v) parameter symbol value input voltage v in 5v output v oltage v out 1. 5v swit ching f requency f osc 1mhz (typ) max i mum output current i o ut max 3a operating temperature range t opr - 40 c to +85c figure 50 . application c ircuit table 3 . recommend ed c omponent values ( n ote 1) in order to reduce the influence of high frequency noise, mount the 0.1 f ceramic capacitor as close as possib le to the v in pin and gnd pin . ( n ote 2 ) for the capacitance of input capacitor, take temperature characteristics, dc bias characteristics, etc. into consideration to set to a minimum value of no less than 4.7 f. ( n ote 3 ) in case capacitance value fluc tuate s due to temperature characteristics, dc bias characteristics, etc. of output capacitor, loop r esponse characteristics may change . please confirm on actual equipment. when selecting a capacitor, confirm the characteristics of the capacitor in its datasheet . c eramic type of capacitors is recommended for the output capacitors . (note 4) for capacitance of bootstrap capacitor take temperature characteristics, dc bias characteristics, etc. into consider ation to set minimum value wrqrohvvwkdq) part no . value company part n ame l 1 h murata fdsd 0420 - h - 1 r 5 m c 1 ( note 1) 0.1 f murata grm155b11a104ma01 c 2 ( note 2 ) 10 f murata grm21bb31a106me18 c 3 - - - c 5 ( note 3 ) 22 f murata grm21bb30j226me38 c 6 ( note 3 ) 22 f murata grm21bb30j226me38 c 8 ( note 4 ) 0.1 f murata grm155b11a104ma01 c 9 2700p f murata grm 155b11h272ka01 c 10 - - - r 0 0 rohm m cr01 mzpj000 r 1 18 k rohm mcr01mzpd1802 r 2 16 k rohm mcr01mzpd1602 r 3 n rohm m cr01 mzpd9101 1 2 3 4 8 7 6 5 v i n e n b s t s w g n d f b i t h m o d e c 9 c 1 c 3 v i n c 5 c 6 r 3 r 2 r 1 c 1 0 v o u t c 2 c 8 l 1 b d 9 a 3 0 2 q w z r 0 m o d e v i n e n
24 / 36 tsz02201 - 0f3f0aj00100 - 1 - 2 ? 20 1 7 rohm co., ltd. all rights re served. 14.mar.2017 rev.001 www.rohm.com tsz22111 ? 15 ? 001 b d 9a302qwz figure 52 . closed loop response i out = 1a (v in = 5v, v out = 1.5 v, l = 1.5 h, c out = 22 f x 2 ) figure 5 3 . load transient response i out = 0.75 a 2.25 a (v in = 5v, v out = 1.5 v, l = 1.5 h, c out = 22 f x 2 ) figure 5 4 . v out ripple i out = 3a (v in = 5v, v out = 1.5 v, l = 1.5 h, c out = 22 f x 2 ) v out = 1 00mv/div time = 1 m s/div i out = 1a/div v out = 50mv/div time = 2 s/div v sw = 2 v/div figure 51 . efficiency vs output current (v in = 5v, v out = 1.5 v, l = 1.5 h) mode = l mode = h v in = 5.0v v out = 1.5 v output current : i out [a] gain phase phase margin 68.1deg -80 -60 -40 -20 0 20 40 60 80 1 10 100 1000 frequency [khz] gain [db] -180 -135 -90 -45 0 45 90 135 180 phase [] 0 10 20 30 40 50 60 70 80 90 100 0.001 0.01 0.1 1 10 i out [a] efficiency [%]
25 / 36 tsz02201 - 0f3f0aj00100 - 1 - 2 ? 20 1 7 rohm co., ltd. all rights re served. 14.mar.2017 rev.001 www.rohm.com tsz22111 ? 15 ? 001 b d 9a302qwz 5. application e xample (v out =1.2v) parameter symbol value input voltage v in 5v output v oltage v out 1.2v switching f requency f osc 1 mhz (typ) max i mum output current i o ut max 3a operating temperature range t opr - 40c to +85c figure 55 . application c ircuit table 4 . recommend ed c omponent values ( n ote 1) in order to reduce the influence of high frequency noise, mount the 0.1 f ceramic capacitor as close as possible to the v in pin and gnd pin . ( n ote 2 ) for the capacitance of input capacitor, take temperature characteristics, dc bias characteristics, etc. into consideration to set to a minimum value of no less than 4.7 f. ( n ote 3 ) in case capacitance value fluc tuates due to temperature characteristics, dc bias characteristics, etc. of output capacitor, loop r esponse characteristics may change . please confirm on actual equipment. when selecting a capacitor, confirm the characteristics of the capacitor i n its datasheet . c eramic type of capacitors is recommended for the output capacitors . (note 4) for capacitance of bootstrap capacitor take temperature characteristics, dc bias characteristics, etc. into consider ation to set minimum value to no less than 0. ) part no . value company part n ame l 1 h murata fdsd 0420 - h - 1 r 5 m c 1 ( note 1) 0.1 f murata grm155b11a104ma01 c 2 ( note 2 ) 10 f murata grm21bb31a106me18 c 3 - - - c 5 ( note 3 ) 22 f murata grm21bb30j226me38 c 6 ( note 3 ) 22 f murata grm21bb30j226me38 c 8 ( note 4 ) 0.1 f murata grm155b11a104ma01 c 9 2700p f murata grm 155b11 h272ka01 c 10 - - - r 0 0 rohm m cr01 mzpj000 r 1 20 k rohm mcr01mzpd2002 r 2 10 k rohm mcr01mzpd1002 r 3 n rohm m cr01 mzpd8201 1 2 3 4 8 7 6 5 v i n e n b s t s w g n d f b i t h m o d e c 9 c 1 c 3 v i n c 5 c 6 r 3 r 2 r 1 c 1 0 v o u t c 2 c 8 l 1 b d 9 a 3 0 2 q w z r 0 m o d e v i n e n
26 / 36 tsz02201 - 0f3f0aj00100 - 1 - 2 ? 20 1 7 rohm co., ltd. all rights re served. 14.mar.2017 rev.001 www.rohm.com tsz22111 ? 15 ? 001 b d 9a302qwz figure 57 . closed loop response i out = 1a (v in = 5v, v out = 1.2 v, l = 1.5 h, c out = 22 f x 2 ) f igure 58 . load transient response i out = 0.75 a 2.25 a (v in = 5v, v out = 1.2 v, l = 1.5 h, c out = 22 f x 2 ) figure 59 . v out ripple i out = 3a (v in = 5v, v out = 1.2 v, l = 1.5 h, c out = 22 f x 2 ) v out = 1 00mv/div time = 1 m s/div i out = 1a/div v out = 50mv/div time = 2 s/div v sw = 2 v/div figure 5 6 . efficiency vs output current (v in = 5v, v out = 1.2 v, l = 1.5 h) mode = l mode = h v in = 5.0v v out = 1.2 v output current : i out [a] gain phase phase margin 64.7deg -80 -60 -40 -20 0 20 40 60 80 1 10 100 1000 frequency [khz] gain [db] -180 -135 -90 -45 0 45 90 135 180 phase [] 0 10 20 30 40 50 60 70 80 90 100 0.001 0.01 0.1 1 10 i out [a] efficiency [%]
27 / 36 tsz02201 - 0f3f0aj00100 - 1 - 2 ? 20 1 7 rohm co., ltd. all rights re served. 14.mar.2017 rev.001 www.rohm.com tsz22111 ? 15 ? 001 b d 9a302qwz 6. selection of components externally connected about the application except the recommendation, please contact us. (1) output lc filter constant the dc/d c converter requires an lc filter for smoothing the output voltage in order to supply a continuous current to the load. i l ripple current flowing through the inductor is returned to the BD9A302QWZ for sllm tm control. it is recommended to use 1.5h inducto r since the feedback current has the best behavior in the specified inductance value. figure 60 . waveform of inductor c urrent figure 61 . output lc f ilter c ircuit calculation with v in = 5v, v out = 1.8v, l = 1.5 h, and switching frequency f o sc = 1mhz is expressed as below. inductor ripple current i l the saturation current of the inductor must be larger than the sum of the maximum output current and one - half ( 1/2 ) of the lqgxfwruulssohfxuuhqw, l . the output capacitor c out affects the output ripple voltage characteristics. the output capac itor c out must satisfy the required ripple voltage characteristics. the output ripple voltage can be represented by the following equation. r esr is the equivalent series resistance (esr) of the output capacitor. be careful of the total capacitan ce value, when additional capacitor c load is connected to the output capacitor c out . use maximum additional capacitor c load ( max ) condition which satisfies the following method. maximum starting inductor ripple current i lstart can be expressed in the f ollowing method. i l t inductor saturation current > i outmax + ? i l / 2 i out average inductor c ur rent ? i l v o u t l c o u t v i n d r i v e r ? ? 768 = l f v 1 ) v (v v = i osc in out in out l - (min) a 3.8 limit current over < i current ripple inductor starting maximum lstart ? ? ) f c 8 1 + (r i = v osc out esr l rpl 2 i + ) i capacitor( output to current charge + current(i output starting maximum = i l cap ) outmax lstart
28 / 36 tsz02201 - 0f3f0aj00100 - 1 - 2 ? 20 1 7 rohm co., ltd. all rights re served. 14.mar.2017 rev.001 www.rohm.com tsz22111 ? 15 ? 001 b d 9a302qwz charge current of the output capacitor i cap can be expressed in the following method . calculation with v in = 5v, v out = 3.3v, l= 1.5h, switching frequency f osc = 800khz( m in), o utput capacitor c out = 44f, so ft start time t ss = 0.5ms( m in), l oad c urrent during s oft s tart i oss = 2 a is expressed as below. (note) c load has an effect on the stability of the dc/dc converter. to ensure the stability of the dc/dc converter, make sure that a sufficient phase margin is provided. (2) o utput voltage setting the output voltage value is set by the feedback resistance ratio. figure 62 . feedback r esistor s ? ? 0.8 r r r = v 1 2 1 out + ? ? ss out load out cap t v ) c + (c = i ? ? f 157.9 c - v t /2) i - i - (3.8 < (max) c out out ss l oss load ?
29 / 36 tsz02201 - 0f3f0aj00100 - 1 - 2 ? 20 1 7 rohm co., ltd. all rights re served. 14.mar.2017 rev.001 www.rohm.com tsz22111 ? 15 ? 001 b d 9a302qwz (3) phase compensation component a curr ent mode contr ol buck dc/dc converter is a one - pole, one - zero system. one - pole is formed by an error amplifier and load and the one - zero point is added by phase compensation. the phase compensation resistor r ith determines the crossover frequency f crs wher e the total loop gain of the dc/dc converter is 0db. a high value crossover frequency f crs provides a good load transient response characteristic but inferior stability. conversely, a low value crossover frequency f crs greatly stabilizes the characteristic s but the load transient response characteristic is impaired. (a) selection of phase compensation resistor r ith the phase compensation resistance r ith can be determined by using the following equation. where: v out is the output voltage [v] f crs is the cross over frequency [hz] c out is the output capacitance [f] v fb is the feedback reference voltage (0.8v (typ)) g mp is the current sense gain (13a/v (typ)) g ma is the error amplifier transconductance (260a/v (typ)) (b) selection of phase compensation capaci tance c ith for stable operation of the dc/dc converter, zero for compensation cancels the phase delay due to the pole formed by the load . the phase compensation capacitance c ith can be determined by using the following equation. (c) loop stability to e nsure the stability of the dc/dc converter, make sure that a sufficient phase margin is provided. a phase margin of at least 45o in the worst conditions is recommended. figure 63 . phase c ompensation circuit figure 64 . bode p lot phase margin ? ? ma mp fb out crs out ith g g v c f v 2 = r ? ? out ith out out ith i r v c = c
30 / 36 tsz02201 - 0f3f0aj00100 - 1 - 2 ? 20 1 7 rohm co., ltd. all rights re served. 14.mar.2017 rev.001 www.rohm.com tsz22111 ? 15 ? 001 b d 9a302qwz 7. pcb layout design figure 6 5 shows a buck dc/dc converter with a large puls ing current flow ing into two loops. the first loop is the current flows to the converter when the h igh - s ide fet is turned on . the flow starts from the input capacitor c in , runs through the fet, inductor l and the output capacitor c out , back to gnd of c in via gnd of c out . the second loop is the current flows when the l ow - s ide fet is turne d on. the flow starts from the l ow - s ide fet, runs through the inductor l and output capacitor c out , back to gn d of the l ow - s ide fet via gnd of c out . route these two loops as thick and as short as possible to reduce noise for improved efficiency. it is recommended to connect the input and output capacitors directly to the gnd plane. the pcb layout has a great influ ence on the dc/dc converter in terms of the over all heat generation, noise and efficiency characteristics . accordingly, design the pcb layout considering the following points : (1) connect an input capacitor as close as possible to the ic v in terminal and gnd terminal on the same plane as the ic. (2) if there is any unused area on the pcb, provide a copper foil plane for the gnd node to assist heat dissipation from the ic and the surrounding components. (3) switching nodes such as sw are susceptible to noise due to ac coupling with the other nodes. route the inductor pattern as thick and as short as possible. (4) provide lines connected to fb and ith terminal with considerable distance from the sw nodes. (5) place the output capacitor away from the input ca pacitor to avoid the propagation of harmonic noise from the input. figure 65 . current l oop of b uck dc/dc c onverter figure 66 . pcb layout ( mode = h ) c i n m o s f e t s c o u t v o u t l v i n g n d v i n e n s w b s t g n d f b i t h m o d e i n p u t b y p a s s c a p a c i t o r ( 0 . 1 f ) i n p u t b u l k c a p a c i t o r ( 1 0 f ) o u t p u t i n d u c t o r o u t p u t c a p a c i t o r v o u t v i n e n a b l e c o n t r o l b o o t s t r a p c a p a c i t o r b a c k s i d e h e a t d i s s i p a t i o n e x p o s e d p a d t h e r m a l v i a s i g n a l v i a g n d f e e d b a c k r e s i s t o r s b o t t o m l a y e r l i n e
31 / 36 tsz02201 - 0f3f0aj00100 - 1 - 2 ? 20 1 7 rohm co., ltd. all rights re served. 14.mar.2017 rev.001 www.rohm.com tsz22111 ? 15 ? 001 b d 9a302qwz i/o equivalence circuit s 2 . en 3 . bst / 4. sw 5 . mode 6 . ith 7 . fb i t h g n d v i n g n d 4 0 g n d m o d e g n d 1 0 1 0 k 5 0 0 k g n d e n g n d g n d 1 0 k 5 7 0 k 4 3 0 k g n d f b 2 0 k 2 0 k b s t v i n g n d v i n s w v i n
32 / 36 tsz02201 - 0f3f0aj00100 - 1 - 2 ? 20 1 7 rohm co., ltd. all rights re served. 14.mar.2017 rev.001 www.rohm.com tsz22111 ? 15 ? 001 b d 9a302qwz operational notes 1. reverse connection of power supply connecting th e power supply in reverse polarity can damage the ic. take precautions against reverse polarity when frqqhfwlqjwkhsrzhuvxsso\vxfkdvprxqwlqjdqh[whuqdoglrghehwzhhqwkhsrzhuvxsso\dqgwkh,&?vsrzhuvxsso\ pins. 2. power supply lines design the pcb layout pattern to provide low impedance supply lines. separate the ground and supply lines of the digital and analog blocks to prevent noise in the ground and supply lines of the digital block from affecting the analog block. furthermore, connect a capaci tor to ground at all power supply pins. consider the effect of temperature and aging on the capacitance value when using electrolytic capacitors. 3. ground voltage ensure that no pins are at a voltage below that of the ground pin at any time, even during tra nsient condition. however, pins that drive inductive loads (e.g. motor driver outputs, dc - dc converter outputs) may inevitably go below ground due to back emf or electromotive force. in such cases, the user should make sure that such voltages going below g round will not cause the ic and the system to malfunction by examining carefully all relevant factors and conditions such as motor characteristics, supply voltage, operating frequency and pcb wiring to name a few. 4. ground wiring pattern when using both sma ll - signal and large - current ground traces, the two ground traces should be routed separately but connected to a single ground at the reference point of the application board to avoid fluctuations in the small - signal ground caused by large currents. also en sure that the ground traces of external components do not cause variations on the ground voltage. the ground lines must be as short and thick as possible to reduce line impedance. 5. thermal consideration should by any chance the maximum junction temperature rating be exceeded the rise in temperature of the chip may result in deterioration of the properties of the chip. in case of exceeding this absolute maximum rating, increase the board size and copper area to prevent exceeding the maximum junction temperat ure rating. 6. recommended operating conditions these conditions represent a range within which the expected characteristics of the ic can be approximately obtained. the electrical characteristics are guaranteed under the conditions of each parameter. 7. inrus h current when power is first supplied to the ic, it is possible that the internal logic may be unstable and inrush current may flow instantaneously due to the internal powering sequence and delays, especially if the ic has more than one power supply. ther efore, give special consideration to power coupling capacitance, power wiring, width of ground wiring, and routing of connections. 8. operation u nder strong electromagnetic field operating the ic in the presence of a strong electromagnetic field may cause th e ic to malfunction. 9. testing on application boards when testing the ic on an application board, connecting a capacitor directly to a low - impedance output pin may subject the ic to stress. always discharge capacitors completely after each process or step. 7kh ,&?v srzhu vxsso\ vkrxog always be turned off completely before connecting or removing it from the test setup during the inspection process. to prevent damage from static discharge, ground the ic during assembly and use similar precautions during trans port and storage. 10. inter - pin short and mounting errors ensure that the direction and position are correct when mounting the ic on the pcb. incorrect mounting may result in damaging the ic. avoid nearby pins being shorted to each other especially to ground, power supply and output pin. inter - pin shorts could be due to many reasons such as metal particles, water droplets (in very humid environment) and unintentional solder bridge deposited in between pins during assembly to name a few. 11. unused input terminals input pins of an ic are often connected to the gate of a mos transistor. the gate has extremely high impedance and extremely low capacitance. if left unconnected, the electric field from the outside can easily charge it. the small charge acquired in this way is enough to produce a significant effect on the conduction through the transistor and cause unexpected operation of the ic. so unless otherwise specified, unused input pins should be connected to the power supply or ground line.
33 / 36 tsz02201 - 0f3f0aj00100 - 1 - 2 ? 20 1 7 rohm co., ltd. all rights re served. 14.mar.2017 rev.001 www.rohm.com tsz22111 ? 15 ? 001 b d 9a302qwz operational notes C n n p + p n n p + p s u b s t r a t e g n d n p + n n p + n p p s u b s t r a t e g n d g n d p a r a s i t i c e l e m e n t s p i n a p i n a p i n b p i n b b c e p a r a s i t i c e l e m e n t s g n d p a r a s i t i c e l e m e n t s c b e t r a n s i s t o r ( n p n ) r e s i s t o r n r e g i o n c l o s e - b y p a r a s i t i c e l e m e n t s
34 / 36 tsz02201 - 0f3f0aj00100 - 1 - 2 ? 20 1 7 rohm co., ltd. all rights re served. 14.mar.2017 rev.001 www.rohm.com tsz22111 ? 15 ? 001 b d 9a302qwz ordering informatio n b d 9 a 3 0 2 q w z - e 2 part number package ummp008az020 packaging and forming specification e2: embossed tape and reel marking diagram ummp008az020 (top view) 302 part number marking lot number 1pin mark d 9 a
35 / 36 tsz02201 - 0f3f0aj00100 - 1 - 2 ? 20 1 7 rohm co., ltd. all rights re served. 14.mar.2017 rev.001 www.rohm.com tsz22111 ? 15 ? 001 b d 9a302qwz physical dimension, tape and reel information package name ummp008az020
36 / 36 tsz02201 - 0f3f0aj00100 - 1 - 2 ? 20 1 7 rohm co., ltd. all rights re served. 14.mar.2017 rev.001 www.rohm.com tsz22111 ? 15 ? 001 b d 9a302qwz revision history date revision changes 1 4 . mar .20 17 001 new release
notice - p ga - e rev.00 3 ? 201 5 rohm co., ltd. all rights reserved. notice precaution on using rohm products 1. our p roducts are designed and manufactured for application in ordinary electronic equipment s ( such as av equipment, oa equipment, telecommunication equipment, home elec tronic appliances, amusement equipment, etc.). if you intend to use our products in devices requiring extremely high reliability ( such as medical equipment ( n ote 1 ) , transport equipment, traffic equipment, aircraft/spacecraft, nuclear power controllers, f uel controllers, car equipment including car accessories, safety devices, etc.) and whose malfunction or failure may cause loss of human life , bodily injury or serious damage to property ( specific applications ) , please consult with the rohm sales represe ntative in advance. unless otherwise agreed in writing by rohm in advance, rohm shall not be in any way responsible or liable for any damages, expenses or losses incurred by you or third parties arising from the use of any rohm s products for specific appl ications. ( n ote1) m edical e quipment c lassification of the s pecific applications japan usa eu china class 2. rohm designs and manufactures its products subject to strict quality control system. however, semiconductor products can fail or malfunction at a certain rate. please be sure to implement, at your own responsi bilities, adequate safety measures including but not limited to fail - safe design against the physical injury, damage to any property, which a failure or malfunction of our products may cause. the following are examples of safety measures: [a] installation of protection circuits or other protective devices to improve system safety [b] installation of redundant circuits to reduce the impact of single or multiple circuit failure 3. our p roducts are designed and manufactured for use under standard conditions a nd not under any special or extraordinary environments or conditions, as exemplified below . accordingly, rohm shall not be in any way responsible or liable for any damages, expenses or losses arising from the use of any rohms p roduct s under any special or extraordinary environments or conditions . if you intend to use our products under any special or extraordinary environments or conditions (as exemplified below), your independent v erification and confirmation of product performance, reliability, etc, pri or to use, must be necessary : [a] use of our products in any types of liquid, including water, oils, chemicals, and organic solvents [b] use of our products outdoors or in places where the p roducts are exposed to direct sunlight or dust [c] use of our prod ucts in places where the p roducts are exposed to sea wind or corrosive gases, including cl 2 , h 2 s, nh 3 , so 2 , and no 2 [d] use of our products in places where the p roducts are exposed to static electricity or electromagnetic waves [e] use of our products in p roximity to heat - producing components, plastic cords, or other flammable items [f] s ealing or coating our p roducts with resin or other coating materials [g] use of our products without cleaning residue of flux (even if you use no - clean type fluxes, cleanin g residue of flux is recommended); or washing our products by using water or water - soluble cleaning agents for cleaning residue after soldering [h] use of the p roducts in places subject to dew condensation 4 . the p roducts are not subject to radiation - proo f design . 5 . please verify and confirm characteristics of the final or mounted products in using the products. 6 . in particular, if a transient load (a large amount of load applied in a short period of time, such as pulse. is applied, confirmation of pe rformance characteristics after on - board mounting is strongly recommended. avoid applying power exceeding normal rated power; exceeding the power rating under steady - state loading condition may negatively affect product performance and reliability. 7 . de - rate power dissipation d epending on a mbient temperature . when used in sealed area, confirm that it is the use in the range that does not exceed the maximum junction temperature. 8 . confirm that operation temperature is within the specified range described in the product specification. 9 . rohm shall not be in any way responsible or liable for f ailure induced under devian t condition from what is defined in this document . precaution for mounting / circuit board design 1. when a highly active halogenous (chlorine, bromine, etc.) flux is used, the residue of flux may negatively affect product performance and reliability. 2. in principle, the reflow soldering method must be used on a surface - mount products, the flow soldering method must be used on a through hole mount products. i f the flow soldering method is preferred on a surface - mount products , please consult with the roh m representative in advance. for details , please refer to rohm mounting specification
notice - p ga - e rev.00 3 ? 201 5 rohm co., ltd. all rights reserved. precautions regarding application examples and external circuits 1. if change is made to the constant of an external circuit, please allow a sufficient margin considerin g variations of the characteristics of the p roducts and external components, including transient characteristics, as well as static characteristics. 2. you agree that application notes, reference designs, and associated data and information contained in t his document are presented only as guidance for products use . therefore, in case you use such information, you are solely responsible for it and you must exercise your own independent verification and judgment in the use of such information contained in t his document. rohm shall not be in any way responsible or liable for any damages, expenses or losses incurred by you or third parties arising from the use of such information. precaution for electrostatic this p roduct is e lectrostatic sensitive product, which may be damaged due to e lectrostatic discharge. please take proper caution in your manufacturing process and stor age so that voltage exceeding the product s maximum rating will not be applied to p roducts. please take special care under dry condition (e .g. grounding of human body / equipment / solder iron, isolation from charged objects, setting of ionizer, friction prevention and temperature / humidity control). precaution for storage / transportation 1. product performance and soldered connections may deteriorate if the p roducts are stored in the places where : [a] the p roducts are exposed to sea winds or corrosive gases, including cl2, h2s, nh3, so2, and no2 [b] the temperature or humidity exceeds those recommended by rohm [c] the products are exposed to direct sunshine or condensation [d] the products are exposed to high electrostatic 2. even under rohm recommended storage condition, solderability of products out of recommended storage time period may be degraded. it is strongly recommended to confirm solderability before using p roducts of which storage time is exceeding the recommended storage time period. 3. store / transport cartons in the correct direction, which is indicated on a carton with a symbol. otherwise bent leads may occur due to excess ive stress applied when dropping of a carton. 4. use p roducts within the specified time after opening a humidity barrier bag. baking is required before using p roducts of which storage time is exceeding the recommended storage time period . precaution for p roduct l abel a two - dimensional barcode printed on rohm p roduct s label is for rohm s internal use only . precaution for d isposition when disposing p roducts please dispose them properly using a n authorized industry waste company. precaution for foreign e xchange and foreign t rade act since concerned goods might be fallen under listed items of export control prescribed by foreign exchange and foreign trade act, please consult with rohm in case of export. precaution regarding intellectual property rights 1. all information an d data including but not limited to application example contained in this document is for reference only. rohm does not warrant that foregoing information or data will not infringe any intellectual property rights or any other rights of any third party reg arding such information or data. 2. rohm shall not have any obligations where the claims, actions or demands arising from the combination of the products with other articles such as components, circuits, systems or external equipment (including software). 3. no license, expressly or implied, is granted hereby under any intellectual property rights or other rights of rohm or any third parties with respect to the products or the information contained in this document. provided, however, that rohm will not assert it s intellectual property rights or other rights against you or your customers to the extent necessary to manufacture or sell products containing the products, subject to the terms and conditions herein. other precaution 1. this document may not be reprinted or reproduced, in whole or in part, without prior written consent of rohm. 2. the products may not be disassemble d, converted, modified, reproduced or otherwise changed without prior written consent of rohm. 3. i n no event shall you use in any way whatso ever the products and the related technical information contained in the products or this document for any military purposes , including but not limited to, the development of mass - destruction weapons . 4. the proper names of companies or products described in this document are trademarks or registered trademarks of rohm, its affiliated companies or third parties.
datasheet datasheet notice ? we rev.001 ? 2015 rohm co., ltd. all rights reserved. general precaution 1. before you use our pro ducts, you are requested to care fully read this document and fully understand its contents. rohm shall n ot be in an y way responsible or liabl e for fa ilure, malfunction or acci dent arising from the use of a ny rohms products against warning, caution or note contained in this document. 2. all information contained in this docume nt is current as of the issuing date and subj ec t to change without any prior notice. before purchasing or using rohms products, please confirm the la test information with a rohm sale s representative. 3. the information contained in this doc ument is provi ded on an as is basis and rohm does not warrant that all information contained in this document is accurate an d/or error-free. rohm shall not be in an y way responsible or liable for an y damages, expenses or losses incurred b y you or third parties resulting from inaccur acy or errors of or concerning such information.
datasheet part number BD9A302QWZ package ummp008az020 unit quantity 4000 minimum package quantity 4000 packing type taping constitution materials list inquiry rohs yes BD9A302QWZ - web page distribution inventory

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