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datashee t product structure silicon monolithic integrated circuit this product has no designed protection against radioactive rays . 1/ 20 tsz02201-0q3q0aj00410-1-2 ? 201 4 rohm co., ltd. all rights reserved. tsz22111 ? 14 ? 001 www.rohm.com 04.nov.2014 rev.001 8v to 35v, 1.5a 1ch buck converter with integrated fet bd9703fp bd9703 cp - v5 bd9703t bd9703t- v5 general description the bd9703xx is a series of single-channel step-down switching regulators capable of pwm operation. it has a built -in p-channel mosfet making its efficiency high at small loads. it has lower power consumption because it is made under bi-cmos process. its operating current is only 4ma (typ) and standby current is 0a (typ). features ? built-in p-channel mosfet for high efficiency ? adjustabl e output voltage via external resistors ? built-in over-current protection and thermal shutdown circuits ? on/off control via stby pin applications tvs, printers, dvd players, projectors, gaming devices, pcs, car audio/navigation systems, etcs, communication equipment, av products, office equipment, industrial devices, and more. key specifications ? input voltage range: 8vto 35v ? output voltage range: 1.0v to 32v ? output current: 1.5a (max) ? switching frequency: 300k hz(typ) ? fet on-resistance: 1.0 ( typ) ? standby current: 0a (typ) ? operating temperature range: - 40 c to +85c packages w(typ) x d(typ) x h(max) typical application circuit figure 1. typical application circuit + + 5 3 4 2 1 v cc stby gnd inv out 5.0v c 5 r 1 : 4k r 2 : 1k c 3 c 4 d 1 l 1 c 1 c 2 to2 20cp - v5 10.00mm x 20.12mm x 4 .60mm to252-5 6. 50 mm x 9.50mm x 2.5 0mm to220fp-5 10.00mm x 30.50mm x 4. 60mm to220fp-5(v5) 10.00mm x 31.50mm x 8.15 mm downloaded from: http:///
2/ 20 tsz02201-0q3q0aj00410-1-2 ? 2 01 4 rohm co., ltd. all rights reserved. www.rohm.com tsz22111 ? 15 ? 001 bd9703fp bd9703 cp - v5 bd9703t bd9703t- v5 04.nov.2014 rev.001 block diagram pin configuration pin description pin no. pin name function 1 vcc input power supply p in 2 out internal pch fet drain p in 3,fin (note 1) gnd ground 4 inv output voltage feedback p in 5 stby on/off control p in (note 1) fin is assigned in the case of to252- 5. figure 2. block diagram vref osc 1 2 driver pwm comp ctl logic tsd error amp 4 inv out gnd 5 vcc ocp stby 3 stby to252-5 (top view) 1 2 3 4 5 gnd vcc gnd inv stby out to220fp-5(v5) (top view) 1 2 3 4 5 vcc out gnd inv stby 1 2 3 4 5 vcc out gnd inv stby to220cp- v5 (top view) to220fp-5 (top view) 1 2 3 4 5 vcc out gnd i nv stby downloaded from: http:///
3/ 20 tsz02201-0q3q0aj00410-1-2 ? 2 01 4 rohm co., ltd. all rights reserved. www.rohm.com tsz22111 ? 15 ? 001 bd9703fp bd9703 cp - v5 bd9703t bd9703t- v5 04.nov.2014 rev.001 absolute maximum ratings (ta= 25 c) parameter symbol rating unit supply voltage (vcc-gnd) v cc 36 v stby-gnd v stby 36 v out-gnd v o ut 36 v inv-gnd v inv 10 v maximum switching current i out 1.5 a power dissipation to 252 pd 0.8 (note 2) w to220 2 (note 3) operating temperature topr - 40 to +85 c storage temperature tstg - 55 to +150 c (note 2) without external heat sink, reduced by 6.4mw/c over 25c (note 3) without external heat sink, reduced by 16.0mw/c over 25c reduced by 1 60 mw/c, when mounted on ideal size heatsink (tc = ta) caution: 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 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. recommended operating conditions (ta=- 40 c to +85 c ) parameter symbol limit unit min typ max input voltage v cc 8.0 or v o ut +3 (note 4) - 35.0 v output voltage v o ut 1.0 - 32 v (note 4) the minimum value of an input voltage is the higher either 8.0v or v out +3 electrical characteristics (unless otherwise noted, ta=25 c , v cc =12v, v o ut =5v, v stby =3v) parameter symbol limit unit con ditions min typ max output on-resistance r on - 1.0 1.5 design guarantee efficiency - 86 - % i o ut 0.5a design guarantee switching frequency f osc 270 300 330 khz load regulation v o ut load - 10 40 mv v cc =20v,i o ut =0.5 a to 1.5a line regulation v o ut line - 40 100 mv v cc =10v to 30v,i o ut =1.0a over-current protection limit i ocp 1.6 - - a inv pin threshold voltage v inv 0.98 1.00 1.02 v inv pin threshold voltage thermal variation v inv - 0.5 - % tj=0 c to 85 c design guarantee inv pin input current i inv - 1 - a v inv =1.0v stby pin threshold voltage on v stbyon 2.0 - 36 v off v stbyoff -0.3 - +0.3 v stby pin input current i stby 5 25 50 a v stby =3v circuit current i cc - 5 12 ma stand-by current i st - 0 5 a v stby 0v downloaded from: http:///
4/ 20 tsz02201-0q3q0aj00410-1-2 ? 2 01 4 rohm co., ltd. all rights reserved. www.rohm.com tsz22111 ? 15 ? 001 bd9703fp bd9703 cp - v5 bd9703t bd9703t- v5 04.nov.2014 rev.001 typical performance curves (unless otherwise specified: ta=25deg, v cc =12v, v out =5v, v stby =3v) figure 3. efficiency vs output current output current : i out [a] efficiency : [%] figure 4. output voltage vs output current (ocp v cc =20v) output current : i out [a] output voltage : v out [ v] figure 5. osc frequency vs ambient temperature ambient temperature : ta [c] osc frequency : f osc [khz] figure 6 . o utput voltage vs output current output current : i out [a] output voltage : v out [v] v cc =30v v cc =2 0v v cc =1 0v downloaded from: http:///
5/ 20 tsz02201-0q3q0aj00410-1-2 ? 2 01 4 rohm co., ltd. all rights reserved. www.rohm.com tsz22111 ? 15 ? 001 bd9703fp bd9703 cp - v5 bd9703t bd9703t- v5 04.nov.2014 rev.001 typical performance curves C continued (unless otherwise specified: ta=25deg, v cc =12v, v out =5v, v stby =3v) figure 7. output voltage vs input voltage (v out =5v, r o ut =5 ) output voltage : v o ut [v] input voltage : v cc [v] figure 8. circuit current vs input voltage (no load) circuit current : i cc [ma] input voltage : v cc [v] osc frequency : f osc [khz] figure 10 . osc frequency vs input voltage input voltage : v cc [v] figure 9. output voltage vs switching current output voltage : v out [v] switching current : i sw [a] downloaded from: http:///
6/ 20 tsz02201-0q3q0aj00410-1-2 ? 2 01 4 rohm co., ltd. all rights reserved. www.rohm.com tsz22111 ? 15 ? 001 bd9703fp bd9703 cp - v5 bd9703t bd9703t- v5 04.nov.2014 rev.001 typical performance curves- continued (unless otherwise specified: ta=25deg, v cc =12v, v out =5v, v stby =3v) figure 11 . i nv threshold voltage vs ambient temperature inv threshold voltage : v inv [v] ambient temperature : ta [ c ] downloaded from: http:///
7/ 20 tsz02201-0q3q0aj00410-1-2 ? 2 01 4 rohm co., ltd. all rights reserved. www.rohm.com tsz22111 ? 15 ? 001 bd9703fp bd9703 cp - v5 bd9703t bd9703t- v5 04.nov.2014 rev.001 application information 1. block function explanation (1) vref this block generates a temperature independent regulated voltage from the v cc input. (2) osc this block generates a triangular waveform the fre quency of which is set by internal resistors and ca pacitors. the output of this block goes to the pwm comparator. (3) error amp this block samples the output voltage through a voltage divider network and compares it with an internal reference voltage. the output of this block is the amplified difference between the sampled output voltage and the reference. (4) pwm comp this block converts the error amp output to pwm pulses going to the driver block. (5) driver this push-pull fet driver which accepts pwm input pulses from pwm comp block drives the internal pch mosfet. (6) stby on/off operation of the ic is controlled via the stby pin. the output is on when stby is high. (7) thermal shutdown (tsd) this circuit protects the ic against thermal runaway and damage due to excessive heat. a thermal sensor detects the junction temperature and switches the output off once the temperature exceeds a threshold value (175deg). hysteresis is built-in (15deg) in order to prevent malfunctions due to temperature fluctuations. (8) over current protection (ocp) the ocp circuit detects the voltage difference between v cc and out by measuring the current through the internal pch mosfet and switches the output off once the voltage reaches the threshold value. the ocp block is a self-recovery type (not latch). 2. timing chart figure 12 . timing chart error amp output outpin osc (internal oscillation wave) output vcc pin voltage wave voltage wave voltage wave downloaded from: http:///
8/ 20 tsz02201-0q3q0aj00410-1-2 ? 2 01 4 rohm co., ltd. all rights reserved. www.rohm.com tsz22111 ? 15 ? 001 bd9703fp bd9703 cp - v5 bd9703t bd9703t- v5 04.nov.2014 rev.001 3. notes for pcb layout figure 13 . layout (1) place capacitors between v cc and ground, as close as possible to the ic to reduce ripple noise and maximize efficiency. (2) place schottky diode between out and ground, and the schottky diode as close as possible to the ic to reduce noise and maximize efficiency. (3) co nnect resistors between inv and ground, and the output capacitor filter at the same ground potential in order to stabilize the output voltage. 4. application component selection and settings (1) inductor l 1 if the winding resistance of the choke coil is too high, the efficiency may deteriorate. even though the over-current protection operates when output current exceeds 1.6a minimum threshold, special attention should be given to the external inductor which could heat up due to the excessive current during over-load or short circuit. note that the current rating for the coil should be higher than i out (max) ? i l. i out (max) : maximum load current. if you flow more than maximum current rating, coil will become overload, and cause magnetic saturation, and that account for efficiency deterioration. select from enough current rating of coil which doesnt over pea k current. where: l 1 is the inductor value v cc is the maximum input voltage v out is the output voltage ? i l is the coil ripple current value f osc is the oscillation frequency (2) schottky barrier diodes d 1 a schottky diode with extremely low forward voltage should be used. selection should be based on the following guidelines regarding maximum forward current, reverse voltage, and power dissipation: (a) the maximum current rating is higher than the combined maximum load current and coil ripple current ( ? i l ). (b) the reverse voltage rating is higher than the v in value. (c) recommend using a diode with smaller the reverse current as possible. in the high temperature case, the reverse current is increasing and it may cause overdrive. (d) power dissipation for the selected diode must be within the rated level. the power dissipation of the diode is expressed by the following formula: where: i out (max) is the maximum load current v f is the forward voltage v out is the output voltage v cc is the input voltage 4 5 2 3 1 inv stb y r 2 : 1k r 1 : 4k c 5 vcc out gnd c 2 5.0v l 1 d 1 c 3 c 4 c 1 osc cc out out cc l f v v l v v i 1 ) ( 1 ? ? ? ? ? ? ? ) / 1( cc out f out v v v max i pdi ? ? ? ? downloaded from: http:///
9/ 20 tsz02201-0q3q0aj00410-1-2 ? 2 01 4 rohm co., ltd. all rights reserved. www.rohm.com tsz22111 ? 15 ? 001 bd9703fp bd9703 cp - v5 bd9703t bd9703t- v5 04.nov.2014 rev.001 (3) capacitor c 1 ,c 2 ,c 3 ,c 4 ,c 5 since large ripple currents flow through capacitors c 1 and c 3 , high frequency and low impedance capacitors must be used. ceramic capacitor c 2 should be present to prevent noise from causing abnormal operation. if the ripple voltage of input and output is large, c 4 can be selected among ceramic, tantalum and os capacitors with low esr to reduce the ripple. however if only low esr capacitors are used, oscillation or unstable operation may occur. c 5 is the capacitor for phase compensation an d is normally not used. if you need to improve the stability of the feedback network, connect c 5 between inv and output. (4) feed back resistance r 1 ,r 2 the offset of output voltage is determined by the feedback resistors and inv pin input current. where: v inv is inv pin threshold voltage if feed back resistance is high, the setting of output voltage will change recommended: resistance between inv pin and gnd = le ss than 10k. 5. recommended circuit recommended components inductor l 1 47h :cdrh127/ld (sumida) schottky diode d 1 :rb050la-40 (rohm) capacitor c 1 100f(50v) :al electric capacitor uhd1h101mpt (nichicon) c 2 2.2f(50v) :ceramic cap cm43x7r225k50a (kyocera) c 3 470f(25v) :al electric capacitor uhd1e471mpt (nichicon) c 4 open c 3 open figure 14. recom me nded circuit output voltage 5v: application circuit example + + 5 3 4 2 1 vcc stby gnd inv out 5.0v c 5 r 1 : 4k r 2 : 1k c 3 c 4 d 1 l 1 c 1 c 2 2 2 1 / ) ( r v r r v inv out ? ? downloaded from: http:///
10 / 20 tsz02201-0q3q0aj00410-1-2 ? 2 01 4 rohm co., ltd. all rights reserved. www.rohm.com tsz22111 ? 15 ? 001 bd9703fp bd9703 cp - v5 bd9703t bd9703t- v5 04.nov.2014 rev.001 6. test circuit figure 15. input output measurement circuit v o ut i inv icc vcc out gnd inv stby vcc sw4 sw5 sw2 1 2 3 4 5 a vo f 1k a a v 2k v inv istb vstb sw6 + + i o v stby i stby v inv i inv 1k ? 2k ? i o ut v cc i cc vcc downloaded from: http:///
11 / 20 tsz02201-0q3q0aj00410-1-2 ? 2 01 4 rohm co., ltd. all rights reserved. www.rohm.com tsz22111 ? 15 ? 001 bd9703fp bd9703 cp - v5 bd9703t bd9703t- v5 04.nov.2014 rev.001 power dissipation to252-5 to220 ambient temperature : ta [c] 0 5 10 15 0 25 50 75 100 125 150 (3 ) 11 .0w (2 ) 6.5w (1 ) 2.0w power dissipation : pd [w] (1) no heat sink (2) 2layer pcb (copper laminate area 15 mm x 15mm) (3) 2layer pcb (copper laminate area 70 mm x 70mm) (4) 4layer pcb (copper laminate area 70 mm x 70mm) (1) no heat sink (2) aluminum heat sink 50 x 50 x 2 (mm 3 ) (3) aluminum heat sink 100 x 100 x 2 (mm 3 ) 0 2 5 3 0 25 50 75 100 125 150 (1 ) 0. 80 w (2 ) 1. 85 w ambient temperature : ta [c] 1 4 85 (3 ) 3. 50 w (4 ) 4. 80 w power dissipation : pd [w] figure 1 6. power dissipation vs ambient temperature figure 1 7. power dissipation ambient temperature ambient temperature : ta [ c] power dissipation : pd [w] ambient temperature : ta [ c] power dissipation : pd [w] downloaded from: http:///
12 / 20 tsz02201-0q3q0aj00410-1-2 ? 2 01 4 rohm co., ltd. all rights reserved. www.rohm.com tsz22111 ? 15 ? 001 bd9703fp bd9703 cp - v5 bd9703t bd9703t- v5 04.nov.2014 rev.001 i/o equivalent circuit pin 1 (v cc ), pin 3 (gnd) pin 2 (out) pin 4 (inv) pin 5 (stby) inv v cc 300 stby v cc 70k 60k 140k figure 18. input output equivalent circuit out vcc v cc vcc gnd vcc downloaded from: http:///
13 / 20 tsz02201-0q3q0aj00410-1-2 ? 2 01 4 rohm co., ltd. all rights reserved. www.rohm.com tsz22111 ? 15 ? 001 bd9703fp bd9703 cp - v5 bd9703t bd9703t- v5 04.nov.2014 rev.001 operational notes 1. reverse connection of power s upply connecting the power supply in reverse polarity can damage the ic. take precautions against reverse polarity wh en connecting the power supply, such as mounting an external diode between the power supply and th e ic s power supply 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 an alog block. furthermore, connect a capacitor to ground at all power supply pi ns . 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 transient condition. 4. ground wiring p at tern when using both small-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 ensure 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 power dissipation 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 pd 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. inrush current when power is first supplied to the ic, it is possible that the internal logic may be unstable and inrush curre nt may flow instantaneously due to the internal powering sequence and delays, especially if the ic has more than one power supply. therefore, give special consideration to power coupling capacitance, power wiring, width of ground wir ing, and routing of connections. 8. operation under strong electromagnetic field operating the ic in the presence of a strong electromagnetic field may cause the 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. the ic s powe r supply should 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 transport and stor age. 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 outp ut pin . inter-pin shorts could be due to many reasons such as metal particles, water droplets (in very humid environme nt) and unintentional solder bridge deposited in between pins during assembly to name a few. downloaded from: http:///
14 / 20 tsz02201-0q3q0aj00410-1-2 ? 2 01 4 rohm co., ltd. all rights reserved. www.rohm.com tsz22111 ? 15 ? 001 bd9703fp bd9703 cp - v5 bd9703t bd9703t- v5 04.nov.2014 rev.001 output pin vcc back current prevention diode bypass diode operational notes C continued 11. unused input pins 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 i t. 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. 12. regarding the input pin of the ic this monolithic ic contains p+ isolation and p substrate layers between adjacent elements in order to keep them isolated. p-n junctions are formed at the intersection of the p layers with the n layers of other elements, creating a parasitic diode or transistor. for example (refer to figure below): when gnd > pin a and gnd > pin b, the p-n junction operates as a parasitic diode. when gnd > pin b, the p-n junction operates as a parasitic transistor. parasitic diodes inevitably occur in the structure of the ic. the operation of parasitic diodes can result in mutual interference among circuits, operational faults, or physical damage. therefore, conditions that cause these diodes to operate, such as applying a voltage lower than the gnd voltage to an input pin (and thus to the p s ubstrate) should be avoided. figure 19. example of monolithic ic structure 13. thermal shutdown circuit(tsd) this ic has a built-in thermal shutdown circuit that prevents heat damage to the ic. normal operation should alw ays be within the ics power dissipation rating. if however the rating is exceeded for a continued perio d, the junction temperature (tj) will rise which will activate the tsd circuit that will turn off all output pins. when the tj falls below the tsd threshold, the circuits are automatically restored to normal operation. note that the tsd circuit operates in a situation that exceeds the absolute maximum ratings and therefore, under no circumstances, should the tsd circuit be used in a set design or for any purpose other than protecting the ic from heat damage. 14. pin short and mistake fitting do not short-circuit between out pin and vcc pin, out pin and gnd pin, or vcc pin and gnd pin. when soldering the ic on circuit board, please be unusually cautious about the orientation and the position of the ic. 15. application circuit although we can recommend the application circuits contained herein with a relatively high degree of confidence, we ask that you verify all characteristics and specifications of the circuit as well as performance under actual conditions. please note that we cannot be held responsible for problems that may arise due to patent infringements or noncompliance with any and all applicable laws and regulations. 16. operation the ic will turn on when the voltage at the stby pin is greater than 2.0v and will switch off if under 0.3v. therefore, do not input voltages between 0.3v and 2.0v. malfunctions and/or physical damage may occur. n n p + p n n p + p substrate gnd n p + n n p + n p p substrate gnd gnd parasitic elements pin a pin a pin b pin b b c e parasitic elements gnd parasitic elements c be transistor (npn) resistor n region close-by parasitic elements figure 20 downloaded from: http:///
15 / 20 tsz02201-0q3q0aj00410-1-2 ? 2 01 4 rohm co., ltd. all rights reserved. www.rohm.com tsz22111 ? 15 ? 001 bd9703fp bd9703 cp - v5 bd9703t bd9703t- v5 04.nov.2014 rev.001 ordering information b d 9 7 0 3 x x - x x x x part number 970 3=35v/1.5a package fp : to252-5 cp -v5 : to220cp- v5 t/t-v5 : to220fp-5(v5) packaging and forming specification e2: embossed tape and reel none: tray, tube v5 : forming done lineup output current switching frequency package orderable part number part number marking 1.5a 300khz (fixed) to252-5 reel of 20 00 bd9703fp- e2 bd9703 to220cp- v5 reel of 500 bd9703cp- v5 e2 bd9703cp to220fp-5 tube of 500 bd9703t bd9703t to220fp-5 (v5) tube of 500 bd9703t- v5 bd9703t marking diagrams to252-5 (top view) part number marking lot number b d 9 7 0 3 to220cp- v5 (top view) b d 9 7 0 3 c p part number marking lot number to220fp-5 (top view) b d 9 7 0 3 t part number marking lot number to220fp-5 (v5) (top view) b d 9 7 0 3 t part number marking lot number downloaded from: http:///
16 / 20 tsz02201-0q3q0aj00410-1-2 ? 2 01 4 rohm co., ltd. all rights reserved. www.rohm.com tsz22111 ? 15 ? 001 bd9703fp bd9703 cp - v5 bd9703t bd9703t- v5 04.nov.2014 rev.001 physical dimension, tape and reel information package name to252-5 downloaded from: http:///
17 / 20 tsz02201-0q3q0aj00410-1-2 ? 2 01 4 rohm co., ltd. all rights reserved. www.rohm.com tsz22111 ? 15 ? 001 bd9703fp bd9703 cp - v5 bd9703t bd9703t- v5 04.nov.2014 rev.001 physical dimension, tape and reel information - continued package name to220cp- v5 downloaded from: http:///
18 / 20 tsz02201-0q3q0aj00410-1-2 ? 2 01 4 rohm co., ltd. all rights reserved. www.rohm.com tsz22111 ? 15 ? 001 bd9703fp bd9703 cp - v5 bd9703t bd9703t- v5 04.nov.2014 rev.001 physical dimension, tape and reel information - continued package name to220fp-5 downloaded from: http:///
19 / 20 tsz02201-0q3q0aj00410-1-2 ? 2 01 4 rohm co., ltd. all rights reserved. www.rohm.com tsz22111 ? 15 ? 001 bd9703fp bd9703 cp - v5 bd9703t bd9703t- v5 04.nov.2014 rev.001 physical dimension, tape and reel information - continued package name to220fp-5 v5 downloaded from: http:///
20 / 20 tsz02201-0q3q0aj00410-1-2 ? 2 01 4 rohm co., ltd. all rights reserved. www.rohm.com tsz22111 ? 15 ? 001 bd9703fp bd9703 cp - v5 bd9703t bd9703t- v5 04.nov.2014 rev.001 revision history date revision changes 04.nov.2014 001 new release downloaded from: http:///
notice- ge rev.003 ? 2013 rohm co., ltd. all rights reserved. notice precaution on using rohm products 1. our products are designed and manufactured for application in ordinary electronic equipments (such as av equipment, oa equipment, telecommunication equipment, home electronic appliances, amusement equipment, etc.). if you intend to use our products in devices requiring extremely h igh reliability (such as medical equipment (note 1) , transport equipment, traffic equipment, aircraft/spacecraft, nuclear powe r controllers, fuel 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 representative in adv ance. unless otherwise agreed in writing by rohm in advance, rohm s hall not be in any way responsible or liable for any damages, expenses or losses incurred by you or third parties arisin g from the use of any rohm s products for specific applications. (note1) medical equipment classification of the specific app lications japan usa eu china class class class b class class | class 2. rohm designs and manufactures its products subject to s trict quality control system. however, semiconductor products can fail or malfunction at a certain rate. please be sure to implement, at your own responsibilities, adeq uate safety measures including but not limited to fail-safe desig n against the physical injury, damage to any property, whic h a failure or malfunction of our products may cause. the followi ng are examples of safety measures: [a] installation of protection circuits or other protective devic es to improve system safety [b] installation of redundant circuits to reduce the impact of single or multiple circuit failure 3. our products are designed and manufactured for use under standard conditions and not under any special or extraordinary environments or conditions, as exemplified be low. accordingly, rohm shall not be in any way responsible or liable for any damages, expenses or losses arisi ng from the use of any rohms products 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 belo w), your independent verification and confirmation of product performance, reliability, etc, prior to use, must be n ecessary: [a] use of our products in any types of liquid, including water, oils, chemicals, and organi c solvents [b] use of our products outdoors or in places where the products are exposed to direct sunlight or dust [c] use of our products in places where the products are e xposed 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 products are exposed t o static electricity or electromagnetic waves [e] use of our products in proximity to heat-producing component s, plastic cords, or other flammable items [f] sealing or coating our products with resin or other coating materials [g] use of our products without cleaning residue of flux (even if you use no-clean type fluxes, cleaning 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 products in places subject to dew condensation 4. the products are not subject to radiation-proof design. 5. please verify and confirm characteristics of the final or mou nted products in using the products. 6. in particular, if a transient load (a large amount of load a pplied in a short period of time, such as pulse. is applied, confirmation of performance characteristics after on-board mou nting is strongly recommended. avoid applying power exceeding normal rated power; exceeding the power rating u nder steady-state loading condition may negatively affec t product performance and reliability. 7. de -rate power dissipation (pd) depending on ambient temperature (ta). wh en used in sealed area, confirm the actual ambient 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 failure induced under deviant condition from what is defined in this document. precaution for mounting / circuit board design 1. when a highly active halogenous (chlorine, bromine, e tc.) flux is used, the residue of flux may negatively affect p roduct performance and reliability. 2. in principle, the reflow soldering method must be used on a surface-mount products, the flow soldering method mu st be used on a through hole mount products. i f the flow soldering method is preferred on a surface-mount p roducts , please consult with the rohm representative in advance. for details, please refer to rohm mounting specification downloaded from: http:///
notice- ge rev.003 ? 2013 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 considering variations of the characteristics of the products and external components, inc luding transient characteristics, as well as static characteristics. 2. you agree that application notes, reference designs, and associated data and information contained in this docu ment are presented only as guidance for products use. therefore, i n case you use such information, you are solel y responsible for it and you must exercise your own independ ent verification and judgment in the use of such information contained in this document. rohm shall not be in any way respon sible or liable for any damages, expenses or losses incurred by you or third parties arising from the use of such informat ion. precaution for electrostatic this product is electrostatic sensitive product, which may be damaged due to electrostatic discharge. please take pr oper caution in your manufacturing process and storage so t hat voltage exceeding the products maximum rating will not be applied to products. please take special care under dry co ndition (e.g. grounding of human body / equipment / solder iro n, 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 products are stored in the places where: [a] the products are exposed to sea winds or corrosive gases, in cluding 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, solderab ility of products out of recommended storage time period may be degraded. it is strongly recommended to confirm so lderability before using products of which storage time is exceeding the recommended storage time period. 3. store / transport cartons in the correct direction, which is in dicated on a carton with a symbol. otherwise bent leads may occur due to excessive stress applied when dropping of a c arton. 4. use products within the specified time after opening a hum idity barrier bag. baking is required before using products of which storage time is exceeding the recommended storage tim e period. precaution for product label qr code printed on rohm products label is for rohm s internal use only. precaution for disposition when disposing products please dispose them properly usi ng an authorized industry waste company. precaution for foreign exchange and foreign trade act since our products might fall under controlled goods prescr ibed by the applicable foreign exchange and foreign trade act, please consult with rohm representative in case of export. precaution regarding intellectual property rights 1. all information and data including but not limited to ap plication example contained in this document is for referen ce only. rohm does not warrant that foregoing information or da ta will not infringe any intellectual property rights or any other rights of a ny third party regarding such information or data. rohm shall not be in any way responsible or liable for infringement of any intellectual property rights or other d amages arising from use of such information or data.: 2. no license, expressly or implied, is granted hereby under any i ntellectual property rights or other rights of rohm or any third parties with respect to the information contained in this d ocument. 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 disassembled, converted, modified, reproduced or otherwise changed without prior written consent of rohm. 3. in no event shall you use in any way whatsoever the products and the related technical information contained in the products or this document for any military purposes, includi ng but not limited to, the development of mass-destruction weapons. 4. the proper names of companies or products described i n this document are trademarks or registered trademarks of rohm, its affiliated companies or third parties. downloaded from: http:///
datasheet datasheet notice ? we rev.001 ? 2014 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. downloaded from: http:///

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