View SC1592ISTRT_6485548.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

1 www.semtech.com power management sc1592 low dropout high performance adjustable positive voltage regulator revision: november 21, 2011 description features applications typical application circuit the sc1592 is a 3a low dropout high performance linear voltage regulator, that provides a low voltage, high current output with a minimum of external components, utilizing dual supply configuration. the sc1592 offers a wide input voltage range from 1.25v to 16v and is ideal for applications that need to convert down to 0.8v. additionally, the sc1592 is fully protected with an exter- nally programmable current limit, and thermal shutdown. also, there is an en input which enables or shuts down the device. the sc1592 voltage regulator is available in 7-lead ddpak and soic-8l edp packages. ? wide input range, v in = 1.25v to 16v, v cntl = 3v to 16v ? 3a guaranteed output current ? 260mv (typ) @ 3a dropout voltage in dual supply mode ? 1% initial accuracy ? adjustable output voltage, down to 0.8v ? programmable current limiting and thermal shutdown ? fast transient response ? excellent line and load regulation ? power so-8 and 7-lead ddpak ? low voltage logic supplies ? microprocessor and chipset supplies ? split plane microprocessor supplies ? advanced graphics cards supplies ? sound cards and auxiliary power supplies ? smps post regulator c1 1uf c2 10uf r1 100 c3 47uf(cer) r3 53 r2 66.5 +1.8v vout +3.3v vcntl +2.5v vin sc1592 cntl in out sense ilim en gnd ttl . typ v 8 . 0 v v ) 3 r 2 r 1 ( v ref ref out = ? + =
2 ? 2011 semtech corporation www.semtech.com sc1592 power management absolute maximum ratings exceeding the specifications below may result in permanent damage to the device, or device malfunction. operation outside of th e parameters specified in the electrical characteristics section is not implied. r e t e m a r a pl o b m y sm u m i x a ms t i n u e g a t l o v t u p n i r e w o pv n i 8 1v e g a t l o v t u p n i l o r t n o cv l t n c 8 1v t n e r r u c t u p t u oi t u o 5a n o i t a p i s s i d r e w o pp d d e t i m i l y l l a n r e t n iw t n e i b m a o t n o i t c n u j e c n a t s i s e r l a m r e h t ) . n i . q s 1 ( k a p d d ) . n i . q s 1 ( p d e l 8 - c i o s a j 9 2 5 . 6 3 w / c e s a c o t n o i t c n u j e c n a t s i s e r l a m r e h t k a p d d p d e l 8 - c i o s c j 3 5 . 5 w / c e g n a r e r u t a r e p m e t n o i t c n u jt j 5 2 1 + o t 0 4 -c e g n a r e r u t a r e p m e t e g a r o t st g t s 0 5 1 + o t 5 6 -c . c e s 0 1 ) g n i r e d l o s ( e r u t a r e p m e t d a e lt d a e l 0 0 3c ) l e d o m y d o b n a m u h ( g n i t a r d s ed s e2v k electrical characteristics unless specified: v in = 2.5v, v en = v cntl = 3.3v, v out = 1.8v, i out = 10ma, r lim = 100 , t j = t a = 25 c. values in bold indicate -40 c < t j < +125 c. r e t e m a r a pl o b m y ss n o i t i d n o c t s e tn i mp y tx a ms t i n u e g a t l o v l o r t n o cv l t n c v t u o v = f e r 36 1 v e g a t l o v e c n e r e f e rv f e r v t u o v = f e r 2 9 7 0 0 8 8 0 8 v m t n e r r u c n i p l o r t n o ci n e _ l t n c v l t n c v = n i v = n e v 6 1 = v t u o v = f e r i ; o 0 = 3 8 a m v l t n c v = n i v = n e v 6 1 = v t u o v = f e r i ; o a 3 = 4 2 n i t n e r r u c n i p l o r t n o c n w o d t u h s i s i d _ l t n c v l t n c v = n i v 6 1 = v n e 0 = 1 5 a v n i n o i t a l u g e r e n i lg e r ) e n i l ( v 5 . 2 v n i v 6 11 0 . 0 1 . 0 v / % v l t n c n o i t a l u g e r e n i lg e r ) l t n c ( v 3 . 3 v l t n c , v 6 1 v t u o v = f e r 1 . 0 4 . 0 v / % n o i t a l u g e r d a o l ) 1 ( g e r ) d a o l ( a m 0 1 i t u o t , a 2 j c 5 2 =8 . 05 . 1% a m 0 1 i t u o t < 0 4 - , a 3 j c 5 2 1 <4 . 1 3 % e g a t l o v t u o p o r dv o d i t u o v ; a 2 = t u o m o n v 8 9 . 0 =0 6 1 0 2 3 v m i t u o v ; a 3 = t u o m o n v 8 9 . 0 =0 6 2 0 2 5
3 ? 2011 semtech corporation www.semtech.com power management sc1592 electrical characteristics (cont.) r e t e m a r a pl o b m y ss n o i t i d n o c t s e tn i mp y tx a ms t i n u n w o d t u h s l a m r e h tt t u h s 0 5 1c n w o d t u h s l a m r e h t s i s e r e t s y h 0 1c t n e r r u c t u p n i e s n e s 1a n e l e v e l w o l 8 . 0 v n e l e v e l h g i h 2 v t n e r r u c t u p n i n ev n e v = l t n c v 5 =5 5 0 0 1 a e c n a d e p m i n e 5 6k y c a r u c c a t i m i l t n e r r u c ) 2 ( i m i l 0 2 -0 2 +% notes: (1) for load regulation use a 1ms current pulse width, d.c. 10% when measuring vout. (2) current limit is programmable, unless specified: v in = 2.5v, v en = v cntl = 3.3v, v out = 1.8v, i out = 10ma, r lim = 100 , t j = t a = 25 c. values in bold indicate -40 c < t j < +125 c. lim out lim r v 240 i ?
4 ? 2011 semtech corporation www.semtech.com sc1592 power management r e b m u n t r a pe g a k c a p ) 1 ( t ( e g n a r . p m e t j ) r t m i 2 9 5 1 c sl 7 - 3 6 2 - o tc 5 2 1 + o t c 0 4 - t r t m i 2 9 5 1 c s ) 3 ( r t s i 2 9 5 1 c sp d e l 8 - c i o s t r t s i 2 9 5 1 c s ) 3 ( b v e 2 9 5 1 c s ) 2 ( d r a o b n o i t a u l a v e pin configurations ordering information pin descriptions # n i p k a p d d # n i p c i o s e m a n n i pn o i t c n u f n i p 11 m i l i. a 5 < t a t e s e b d l u o h s t i m i l t n e r r u c e l b a m m a r g o r p y l l a n r e t x e 23 , 2n i d e i l p p u s s i t n e r r u c d a o l t u p u o e h t . e c i v e d r e w o p e h t o t t u p n i r o t c e l l o c e h t s i s i h t . n i p s i h t h g u o r h t 34 l t n c l l i w n i p s i h t o t n i w o l f t n e r r u c e h t . y r t i u c r i c l o r t n o c e h t r o f y l p p u s s a i b e h t s i n i p s i h t e g a t l o v e h t , e t a l u g e r o t e c i v e d e h t r o f . t n e r r u c t u p t u o e h t f o % 1 y l e t a m i x o r p p a e b n a h t s s e l o n t u b , e g a t l o v t u p t u o e h t n a h t r e t a e r g v 5 . 1 t s a e l t a e b t s u m n i p s i h t n o v . n i m _ l t n c b a t , 4d a pd n g. d n u o r g 56 , 5t u o. e c i v e d e h t f o t u p t u o r e w o p e h t s i s i h t 67 e s n e s. t u p n i k c a b d e e f a s i s i h t 78 n ev o t l a u q e r o s s e l e b d l u o h s , h g i h n e h w . t u p n i e l b a n e . l t n c notes: (1) only available in tape and reel packaging. a reel contains 800 devices for to-263 package and 2500 devices for soic package. (2) when ordering evaluation board please specify pack- age needed (to-263(ddpak) or soic(edp)). (3) lead free product. top view (to-263-7l ddpak) 1 2 3 4 en ilim top view (soic-8l edp) 5 6 7 8 sense in out in out cntl n o i t c n u f n i p 1m i l i 2n i 3l t n c 4d n g 5t u o 6e s n e s 7n e b a td n g 1 2 3 4 in ilim bottom view (soic-8l edp) 5 6 7 8 cntl sense out in out en gnd exposed die pad tab
5 ? 2011 semtech corporation www.semtech.com power management sc1592 block diagram figure 1 i lim = selected current limit value v out = regulated output voltage r lim = externally programmable current limit resistor. accuracy of the current limit setting is better than 20% over full operating temperature range. *internal esd structure. in cases where en is permanently tied to v in , it?s recommended that a 10-20k resistor should be inserted in the link between en and v in . ? ? ? ? ? ? lim out lim i v x 240 r
6 ? 2011 semtech corporation www.semtech.com sc1592 power management application information the sc1592 is a 3a low dropout high performance linear voltage regulator. the sc1592 can be used for voltage applications as low as 0.8v and is ideal for down conversion utilizing dual supply configuration. this allows for extremely low dropout voltages with excellent load and line regulation. the sc1592 can be utilized in high voltage applications, with v in and v cntl up to 16v, providing there is adequate thermal management. sc1592 is designed to meet stringent requirements of current generation microprocessors and other sensitive electronic devices. this is possible by employing an additional bias source, v cntl . the voltage of this supply needs to be at least 1.5v greater than the output voltage in order to achieve low dropout, typically less then 300mv. unlike most of the other high current linear regulators, the sc1592 provides a programmable current limit which can be set with a single resistor. the value of the programming resistor is: lim out lim r v 240 i ? where i lim = selected current limit value v out = regulated output voltage r lim = programmable current limit resistor the sc1592 has a fast transient response that allows it to handle large load changes associated with high current applications. proper selection of the of the output capacitor and it?s esr value determines stable operation and optimizes performance. the typical application shown in figure 2 was tested with a wide range of different capacitors. the circuit was found to be unconditionally stable with capacitor values from 47 f to 330 f and esr ranging from 0.5m to greater then 75m . it?s recommended to maintain 5-10ma through the output divider network in order to have a tight load and line regulation. initial accuracy of the internal voltage reference v ref = 0.8v 1% over full temperature range. this commands the use of 0.5% or better accuracy resistors to build a precision power supply. c1 2.2uf c2 22uf r1 c3 100uf r3 r2 +1.8v vout +3.3v vcntl +2.5v vin sc1592 cntl in out sense ilim en gnd 10k 66.5 53 100 figure 2 the circuit in figure 2 shows a typical application of 2.5v to 1.8v conversion with a 3.3v control supply and the load range of up to 3a steady state. considering the approximate 2w power being dissipated by the pass element of the sc1592, we are still able to choose an so-8 edp package with t ja = 36.5c/w mount on the 1sq.in. copper pad allocated for adequate heat transfer. the ambient temperature in this case should not exceed 50c. if this temperature range is too restrictive, then the ddpak can be utilized, having t ja = 29c/w mount on the same size copper pad. input capacitor: a minimum of 10 f ceramic capacitor is recommended to be placed directly next to the vin pin. this allows for the device being some distance from any bulk capacitance on the rail. additionally, bulk capacitance may be added closely to the input supply pin of the sc1592 to ensure that vin does not sag, improving load transient response. output capacitor: a minimum bulk capacitance of 33 f, along with a 0.1 f ceramic decoupling capacitor is recommended. increasing the bulk capacitance will improve the overall transient response. the use of multiple lower value ceramic capacitors in parallel to achieve the desired bulk capacitance will not cause stability issues. although designed for use with ceramic output capacitors, the sc1592 is extremely tolerant of output capacitor esr values and thus will also work comfortably with tantalum output capacitors. . typ v 8 . 0 v v ) 3 r 2 r 1 ( v ref ref out = ? + =
7 ? 2011 semtech corporation www.semtech.com power management sc1592 typical characteristics load transient reponse v out 20mv/div v in i out time ( 2ms /div ) v in = 2.5v v out = 1.8v v cntl = 3.3v c in = 22uf c out = 100uf istep: 15ma to 3a slew rat e: 2 .5 a/ us time (200us/div) istep: 15 ma to 3a slew rate: 2.5a/us v in = 2.5v v out = 1.8v v cntl = 3.3v c in = 22uf c out = 100uf v out 20mv/div v in i out
8 ? 2011 semtech corporation www.semtech.com sc1592 power management typical characteristics (cont.) load regulation 1.50 1.55 1.60 1.65 1.70 1.75 1.80 1.85 1.90 1.95 2.00 0.00.51.01.52.02.53.0 output current ( a ) output voltage(v) v cntl = 3.3v v in = 2.5v output voltage vs . te m pe rature 1.5 1.55 1.6 1.65 1.7 1.75 1.8 1.85 1.9 1.95 2 -40-200 20406080100120 tempera ture ( o c) output voltage (v) v cntl = 3.3v v in = 2.5v i out = 10ma
9 ? 2011 semtech corporation www.semtech.com power management sc1592 typical characteristics (cont.) enablethreshold vs. tem perature 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 -40 -20 0 20 40 60 80 100 120 tempera ture ( o c) output v oltage (v ) v cntl = 3.3v v in = 2.5v v out = 1.8v i out = 10ma
10 ? 2011 semtech corporation www.semtech.com sc1592 power management typical characteristics (cont.) dropout voltage (control supply) 0.8 0.9 1.0 1.1 01 23 output current ( a ) dropout v oltage (v ) initial v cntl = 3.3v v in = 2.5v v out = 1.8v dropout voltage (input supply) 0.00 0.10 0.20 0.30 0.40 0.50 0123 output current ( a ) dropout v ol ta ge ( v ) v cntl = 3.3v initial v in = 2.5v v out = 1.8v
11 ? 2011 semtech corporation www.semtech.com power management sc1592 contol current vs . te m perature (in shutdow n) 1 10 100 1000 10000 -40 -20 0 20 40 60 80 100 120 tempera ture ( o c) control current ( na ) v cntl = 3.3v v in = 2.5v v en = 0v i out = 10ma control current vs tem perature (in regulation) 1 10 100 -40 -20 0 20 40 60 80 100 120 tempera ture ( o c) control current ( ma ) v cntl = 3.3v v in = 2.5v i out = 3a i out = 2a i out = 1a typical characteristics (cont.)
12 ? 2011 semtech corporation www.semtech.com sc1592 power management typical characteristics (cont.) dropout voltage vs . te m perature (v cntl - v out ) 500 600 700 800 900 1000 1100 1200 1300 1400 1500 -40 10 60 110 tempera ture ( o c) dropout voltage (mv) initial v cntl = 3.3v v in = 2.5v v out = 1.8v i out = 3a dropout voltage vs . tem pe rature (v in - v out ) 0 50 100 150 200 250 300 350 400 450 500 -40-20 0 20 406080100120 tempera ture ( o c) dropout voltage (mv) i out = 3a i out = 2a v cntl = 3.3v initial v in = 2.5v v out = 1.8v
13 ? 2011 semtech corporation www.semtech.com power management sc1592 typical characteristics (cont.) 47uf esr vs . iout 0.001 0.01 0.1 1 10 0 0.5 1 1.5 2 2.5 3 output current ( a ) esr (ohm) unstable area stable area 150uf esr vs . iout 0.001 0.01 0.1 1 10 00.511.522.53 output current ( a ) esr (ohm) unstable area stable area 330uf esr vs. iout 0.001 0.01 0.1 1 10 00.511.522.53 output current ( a ) esr (ohm) unstable area stable area
14 ? 2011 semtech corporation www.semtech.com sc1592 power management c1 2.2uf c2 22uf r1 c3 100uf r3 r2 +1.8v vout +3.3v vcntl +2.5v vin sc1592 cntl in out sense ilim en gnd 10k (cer) (cer) 100 53 66.5 r opt u1 evaluation board schematic evaluation board schematic - bill of material f e ry t qe c n e r e f e re u l a v / r e b m u n t r a pr e r u t c a f u n a m 111 c6 0 2 1 , c i m a r e c , v 6 1 , f u 2 . 2r a l i m i s r o a t a r u m 212 c0 1 2 1 , c i m a r e c , v 0 1 , f u 2 2r a l i m i s r o a t a r u m 313 c2 1 8 1 , c i m a r e c , v 3 . 6 , f u 0 0 1r a l i m i s r o a t a r u m 411 r5 0 8 0 , % 5 , 0 0 1y n a 512 r5 0 8 0 , % 5 . 0 , 5 . 6 6y n a 613 r5 0 8 0 , % 5 . 0 , 3 5y n a 71 t p o r5 0 8 0 , % 0 1 , k 0 1y n a 811 u2 9 5 1 c s. p r o c h c e t m e s . typ v 8 . 0 v v ) 3 r 2 r 1 ( v ref ref out = ? + =
15 ? 2011 semtech corporation www.semtech.com power management sc1592 evaluation board - soic-8 edp
16 ? 2011 semtech corporation www.semtech.com sc1592 power management evaluation board - to-263-7l (ddpak)
17 ? 2011 semtech corporation www.semtech.com power management sc1592 land pattern - soic-8l edp outline drawing - soic-8l edp notes: 1. controlling dimensions are in millimeters (angles in degrees). 2. this land pattern is for reference purpose only. consult your manufacturing group to ensure your company's manufacturing guidelines are met. 3. thermal vias in the land pattern of the exposed pad shall be connected to a system ground plane. failure to do so may compromise the thermal and/or functional performance of the device. 4. reference ipc-sm-782a, section 9.1, rlp no. 300a. dimensions dim millimeters c (5.30) d3.50 e 5.10 f2.60 g3.20 p1.27 x0.60 y2.10 z 7.40 y g z x p f (c) d e thermal via ? 0.36mm solder mask see detail detail a a 8 0.25 1.27 bsc 6.00 bsc 3.90 4.90 - 3.80 4.80 0.31 4.00 5.00 0.51 bxn 2x n/2 tips seating aaa c e/2 12 n a a1 bbb ca-bd ccc c e/2 a2 0 0.20 0.10 - 8 0.40 0.17 1.25 0.00 1.35 (1.05) 0.72 - 1.04 0.25 - - - 1.75 1.65 0.13 0.25 0.50 - c l (l1) 01 0.25 gauge plane h 3. dimensions "e1" and "d" do not include mold flash, protrusions or gate burrs. -b- controlling dimensions are in millimeters (angles in degrees). datums and to be determined at datum plane . notes: 1. 2. -a- -h- side view a b c d e h plane e exposed pad l1 n 01 bbb aaa ccc a b a2 a1 d e e1 l h e c dim min millimeters dimensions max nom f h h - - - - 3.30 2.41 e1 d 4. the measurement of dimension "f" does not include exposed tie bar. (f) (h)
18 ? 2011 semtech corporation www.semtech.com sc1592 power management detail a a dimensions "d" and "e" do not include mold flash, protrusions or gate burrs. controlling dimensions are in inches (angles in degrees). notes: 1. 2. side view e a aaa ba plane seating b plated copper heat spreader b x n (l1) e1 d1 a1 a 0 e e/2 l1 d 01 l see detail c1 c 12345 max dimensions .066 .420 8 .065 .010 .190 .029 .110 .036 .380 dim e1 - .245 aaa 0 01 l l1 n e h - 15 0 .010 - .050 bsc .070 - - 7 - d1 c e c1 d a1 b a - .015 .270 .380 .045 .326 - - - - nom .000 .020 min .160 - - - inches -- - 6.22 1.27 bsc - 15 - 0 0.25 - 1.78 - - 7 - - 8 2.79 1.68 nom - 0.38 6.86 9.65 1.14 8.28 - - - - - min 4.06 0.00 0.51 - - - 0.74 - 10.67 1.65 9.65 0.25 0.91 max 4.83 millimeters 67 h .575 - .625 14.61 - 15.88 dim g millimeters inches .125 3.18 dimensions z.625 15.88 g p y h h .420 10.67 k.360 9.14 p.050 1.27 x.038 0.97 y.140 3.56 k z x notes: 2. this land pattern is for reference purposes only consult your manufacturing group to ensure your company's manufacturing guidelines are met. 1. controlling dimensions are in inches (angles in degrees). outline drawing - to-263-7l (ddpak) recommended land pattern - to-263-7l (ddpak)
19 ? 2011 semtech corporation www.semtech.com power management sc1592 semtech corporation power management products division 200 flynn road, camarillo, ca 93012 phone: (805)498-2111 fax (805)498-3804 contact information ? semtech 2011 all rights reserved. reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. the information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. no liability will be accepted by the publisher for any consequence of its use. publication thereof does not convey nor imply any license under patent or other industrial or intellectual property rights. semtech assumes no responsibility or liability whatsoever for any failure or unexpected operation resulting from misuse, neglect improper installation, repair or improper handling or unusual physical or electrical stress including, but not limited to, exposure to parameters beyond the specifi ed maximum ratings or operation outside the specified range. semtech products are not designed, intended, authorized or warranted to be suitable for use in lifesupport applications, devices or systems or other critical applications. inclusion of semtech products in such applications is understood to be undertaken solely at the customer?s own risk. should a customer purchase or use semtech products for any such unauthorized application, the customer shall indemnify and hold semtech and its offi cers, employees, subsidiaries, affi liates, and distributors harmless against all claims, costs damages and attorney fees which could arise. notice: all referenced brands, product names, service names and trademarks are the property of their respective owners.

▲Up To Search▲

Price & Availability of SC1592ISTRT

	To Download SC1592ISTRT Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .