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january 2010 doc id 13852 rev 2 1/17 1 L5956 multifunction voltage regulator for car radio features four outputs: ? 8.5 v @ 500 ma ? 5 v @ 300 ma permanent ? 5 v @ 800 ma ? 3.3 v @ 800 ma 2 a high side driver reset function ignition comparator load dump protection thermal shutdown overcurrent limitation all pins esd protected description the L5956 contains a triple voltage regulator and a power switch. the ic includes a monitoring circuit for detection. the ic features a very low quiescent under standby . powerso20 (slug-up) multiwatt 15 (vertical) table 1. device summary order code package packing L5956 multiwatt 15 (vertical) tube L5956pd powerso20 tube L5956pdtr powerso20 tape and reel www.st.com
contents L5956 2/17 doc id 13852 rev 2 contents 1 block diagram and pins descripti on . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.1 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.2 pins description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2 electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.1 absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.2 thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.3 electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3 timing diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 4 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 5 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
L5956 list of tables doc id 13852 rev 2 3/17 list of tables table 1. device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 table 2. absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 table 3. thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 table 4. electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 table 5. document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
list of figures L5956 4/17 doc id 13852 rev 2 list of figures figure 1. block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 figure 2. pins connection (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 figure 3. typical application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 figure 4. maximum esr for stability valid for all the regulators outputs . . . . . . . . . . . . . . . . . . . . . . 10 figure 5. timing diagram of regulators and power switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 figure 6. backup and reset diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 figure 7. hold and thermal protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 figure 8. ignition buffer diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 figure 9. protection of the power switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 figure 10. short circuit diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 figure 11. powerso20 (slug-up) mechanical data and package dimensions . . . . . . . . . . . . . . . . . . . 14 figure 12. multiwatt 15 (vertical) mechanical data and package dimensions . . . . . . . . . . . . . . . . . . . 15
L5956 block diagram and pins description doc id 13852 rev 2 5/17 1 block diagram and pins description 1.1 block diagram figure 1. block diagram 1.2 pins description figure 2. pins connection (top view) power switch ignition buffer thermal protection reset buffer dump load protection reg1 reg2 reg3 reg4 vini (main) en_sw enreg1_3(8.5v_5v) bu vin2 enreg4(3.3v) ign in res hold reg 4(3.3v) reg 3(5v) reg 2(perm)(5v) reg 1(8.5v) sw ign out d02au1342a cres gnd hold en_sw enreg1_3(8.5v_5v) enreg4(3.3v) res cres ignout ignin reg3(5v) n.c. reg1(8.5v) n.c. sw vin1 bu reg2(5v) heatsink 10 8 9 7 6 5 4 3 2 13 14 15 16 17 19 18 20 12 1 11 reg4(3.3v) vin2 d02au1343 1 2 3 4 5 6 7 9 10 11 8 bu reg2 vin1 gnd hold en sw enreg1-3 enreg4 cres res reg4 13 14 15 12 vin2 reg3 reg1 switch d03au1513a powerso multiwatt
electrical specifications L5956 6/17 doc id 13852 rev 2 2 electrical specifications 2.1 absolute maximum ratings 2.2 thermal data 2.3 electrical characteristics v s = 14.4 v; t amb = 25 c; unless otherwise specified. table 2. absolute maximum ratings symbol parameter value unit v sdc dc operating supply voltage 30 v v str transient supply voltage 50 v i o output current internally limited t op operating temperature range -40 to 85 c t stg storage temperature -55 to 150 c t j junction temperature -55 to 150 c p d power dissipation at t case = 85 c 43 w table 3. thermal data symbol parameter powerso multiwatt unit r th j-case thermal resistance juncti on-to-case max. 1.5 1.8 c/w table 4. electrical characteristics symbol parameter test condition min. typ. max. unit input supplies v in1 input supply voltage 1 operating 9 - 18 v v in2 input supply voltage 2 operating 6 - 18 v v in1 input supply voltage 1 reverse polarity non operating v in2 input supply voltage 2 reverse polarity non operating i q total quiescent current standby (-20 c to 85 c) ign in = 5 v --60a regx = 5 v, regsw = 5 v, ign in = 5 v -5-ma standby (-20 c to 85 c) ign in = 5 v, v cc = 18 v - 100 170 a
L5956 electrical specifications doc id 13852 rev 2 7/17 load dump v in1 battery overvoltage v in1 18 20 22 v load dump v in2 battery overvoltage v in2 18 20 22 v regulator 1 v o (reg 1) output voltage 8.5 v - 8 8.5 9 v v line regulation v in1 = 10 to 18 v; i = 500 ma - - 50 mv v line regulation v in1 = 9.3 to 18 v; i = 10 ma - - 50 mv vi load regulation i reg1 = 1 to 500 ma - - 100 mv i q quiescent current i reg1 = 10 ma - - 5 ma psrr supply voltage ripple rejection f = 1 khz; v in1 = 1.5 vpp; i o = 500 ma 50 - - db v drop drop out voltage i reg1 = 500 ma (1) --0.6v i m current limit r short = 0.5 0.6 - 1.2 a regulator 2 v o (st by) output voltage 5 v - 4.75 5 5.25 v v line regulation v in1 = 7 to 18 v; i = 300 ma - - 50 mv v line regulation v in1 = 6 to 18 v; i = 10 ma - - 50 mv vi load regulation i reg2 = 1 to 300 ma - - 100 mv i q quiescent current i reg2 = 10 ma - - 3 ma psrr supply voltage ripple rejection f = 1 khz; v in1 = 1.5 vpp; i o = 300 ma 50 - db v drop drop out voltage i reg2 = 300 ma (1) --1.5v v drop drop out voltage i reg2 = 100 ma (1) --0.6v i m current limit r short = 0.5 400 - 800 ma regulator 3 v o (reg 3) output voltage 5v - 4.75 5 5.25 v v line regulation v in2 = 7 to 18 v; i = 800 ma - - 50 mv v line regulation v in2 = 6 to 18 v; i = 10 ma - - 50 mv vi load regulation i reg3 = 1 to 800 ma - - 100 mv i q quiescent current i reg3 = 10 ma - - 5 ma psrr supply voltage ripple rejection f = 1 khz; v in1 = 1.5 vpp; i o = 800 ma 50 - - db v drop drop out voltage i reg3 = 800 ma (1) --1.5v i m current limit r short = 0.5 1-2a table 4. electrical characteristics (continued) symbol parameter test condition min. typ. max. unit
electrical specifications L5956 8/17 doc id 13852 rev 2 regulator 4 v o (reg 4) output voltage 3.3 v - 3.15 3.3 3.45 v v line regulation v in2 = 6 to 18 v; i = 800 ma - - 50 mv v line regulation v in2 = 6 to 18 v; i = 10 ma - - 50 mv vi load regulation i reg4 = 1 to 800 ma - - 100 mv i q quiescent current i reg4 = 10 ma - - 5 ma psrr supply voltage ripple rejection f = 1 khz; v in1 = 1.5 vpp; i o = 800 ma 50 - - db v drop drop out voltage i reg4 = 800 ma (1) --2.5v i m current limit r short = 0.5 1-2a power switch v dropsw drop voltage power switch i dcsw = 1.8a max. - - 0.5 v i psw1 peak current power switch peak time < 15 ms 2 - 3.5 a i psw2 peak current power switch peak time > 40 ms 1 - 2 a sw del delay protection - 15 - 40 ms reset buffer (with push-pull buffer) res res falling vreg2 = 5 v 4.6 4.7 4.8 v res res rising vreg2 = 5 v 4.65 4.8 4.95 v v hys(res) hysteresis of reset buffer - 50 100 200 mv ih source (res) high level source current reset = 0 v 1000 1300 1600 a il sink (res) low level sink current reset = 5 v 14 16 18 ma res delay cres = 47nf - 10 - 60 ms tres reset rise and fall time r = 10 k , c = 15 pf - - 50 s i charge charge current c res = 0 v 3 5 10 a i discharge discharge current c res = 5 v 1 - 3 ma v th(f) falling voltage threshold - 1 1.2 1.4 v v th(r) rising voltage threshold - 2.5 2.8 3.5 v v ol low level i sink(res) = 1 ma - 0.3 0.5 v v oh high level - 4.5 vreg2 5.5 v hold signal v lowi hold output low for v in1 low low detection - - 9 v v lowh hold output high for v in1 normal normal high detection 10 - 18 v v lowl hold output low for v in1 high low detection 22 - - v table 4. electrical characteristics (continued) symbol parameter test condition min. typ. max. unit
L5956 electrical specifications doc id 13852 rev 2 9/17 v hold r low v in1 threshold v in1 low th. 9 9.5 10 v v hys (hold_l) hysteresis low th. - 50 150 200 mv v hold f high v in1 threshold v in1 high th. 182022 v v hys (hold_m) hysteresis high th. - 200 500 mv ignition buffer (push-pull with schmidt trigger) ign in ign out falling - 1.031.171.28 v ign in ign out rising - 1.181.271.33 v v hys(ignout) hysteresis of ignition buffer - - 50 - mv ih source(ignout) high level source current i gnout = 0 v 1000 1500 2000 a il sink(ignout) low level sink current i gnout = 5 v 101520ma v ol low level il sink (ignout) = 1 ma - 0.3 0.5 v v oh high level - 4.5 vreg2 5.5 v ign rise rising time c = 15 pf - - 10 s ign fall fall time c = 15 pf - - 10 s i clamp input clamp current v cc < v ign < 50 v - - 2 ma ign in input voltage operative 0 - 50 v enable input (regulators 1,3,4 and power switch) v th voltage threshold - 1.3 1.8 2.3 v en in input voltage operative 0 - 5 v 1. drop condition means that the supply voltage drop down to 100 mv from the regulat ed output and the regulator is sourcing its maximal load current. table 4. electrical characteristics (continued) symbol parameter test condition min. typ. max. unit
electrical specifications L5956 10/17 doc id 13852 rev 2 figure 3. typical application circuit figure 4. maximum esr for stability valid for all the regulators outputs power switch reg1 reg2 reg3 reg4 vin1 en sw bu vin2 enreg4 hold reg 4 reg 3 reg 2 reg 1 sw vs enreg1-3 470 f 100 nf cfilt (*) cfilt (*) cfilt (*) 22 f ign out ign out ignition buffer thermal protection reset buffer dump load protection ign in cres 10 k 1 nf 47 nf res to processor to processor ignition buffer thermal protection reset buffer dump load protection ign in ign in ac00427a cres 10 k 1 nf 47 nf res to processor to processor 470 f cfilt (*) 10 k (*) recommended output filtering capacitors for all the regulators: c range = 5 f to 100 f, esr range = 0.5 to 10 (t= -40 ?c to +85 ?c) 5 10 100 c [f] esr [ ] 0.5 10 1 5 maximum esr minimum esr stable region ac00591
L5956 timing diagrams doc id 13852 rev 2 11/17 3 timing diagrams figure 5. timing diagram of regulators and power switch figure 6. backup and reset diagram 9v v vin1=vin2 9v power switch 8.5v 5v reg1(8.5v) reg3(5v) 3.3v reg4(3.3v) enreg1-3 5v reg2(5v) enreg4 en-sw dump d02au1420c m v m 18v < v m 22v 4.7 4.8 5 5 3 14 reset cdelay d02au1422 5v perm vbatt backup cap. t t t
timing diagrams L5956 12/17 doc id 13852 rev 2 figure 7. hold and thermal protection figure 8. ignition buffer diagram figure 9. protection of the power switch 9.5 18 22 vin1 5v 5v enreg1-3 8.5v hold temperature protection 5v 5 reg2(5v) reg1(8.5v) 3.3v reg4(3.3v) reg3(5v) enreg4 dump 9v 8.5v 5v on t ? 160 3.3v 1.17v 1.27v 50v ignition input 14v ignition output vin1 load dump d02au142 4 16v i sw v sw 1.5a 3a not delayed delayed in case v in1 <16v d02au1425
L5956 timing diagrams doc id 13852 rev 2 13/17 figure 10. short circuit diagram reg1 reg2 reg3 reg4 switch short to gnd short to gnd short to gnd short to gnd short to gnd hold
package information L5956 14/17 doc id 13852 rev 2 4 package information in order to meet environmental requirements, st offers these devices in different grades of ecopack ? packages, depending on their level of environmental compliance. ecopack ? specifications, grade definitions and product status are available at: www.st.com . ecopack ? is an st trademark. figure 11. powerso20 (slug-up) mechanical data and package dimensions outline and mechanical data e a a2 e a1 a5 d2 (x2) m pso20dme d e1 e2 e2 h x 45? s gage plane 0.35 l detail a detail a (coplanarity) gc - c - seating plane e3 b c n h n v e3 10 1 d1 20 11 a4 r dim. mm inch min. typ. max. min. typ. max. a 3.25 3.5 0.128 0.138 a2 3 3.15 3.3 0.118 0.124 0.130 a4 0.8 1 0.031 0.039 a5 0.15 0.2 0.25 0.006 0.008 0.010 a1 0.030 -0.040 0.0012 -0.0016 b 0.4 0.53 0.016 0.021 c 0.23 0.32 0.009 0.012 d (1) 15.8 16 0.622 0.630 d1 9.4 9.8 0.370 0.385 d2 1 0.039 e 13.9 14.5 0.547 0.570 e1 (1) 10.9 11.1 0.429 0.437 e2 2.9 0.114 e3 5.8 6.2 0.228 0.244 e 1.12 1.27 1.42 0.044 0.050 0.056 e3 11.43 0.450 g 0 0.1 0 0.004 h 15.5 15.9 0.61 0.625 h 1.1 0.043 l 0.8 1.1 0.031 0.043 n 10? (max) r 0.6 0.024 s 0? (min.) 8? (max.) v 5? (min.) 7? (max.) (1) d a nd e1 do not include mold flash or protusions. - mold flash or protusions shall not exceed 0.15mm (0.006) - critical dimensions: e, a1, e and g . powerso20 (slug up) 0088529 c
L5956 package information doc id 13852 rev 2 15/17 figure 12. multiwatt 15 (vertical) mechanical data and package dimensions outline and mechanical data 0016036 j dim. mm inch min. typ. max. min. typ. max. a5 0.197 b 2.65 0.104 c 1.6 0.063 d 1 0.039 e 0.49 0.55 0.019 0.022 f 0.66 0.75 0.026 0.030 g 1.02 1.27 1.52 0.040 0.050 0.060 g1 17.53 17.78 18.03 0.690 0.700 0.710 h1 19.6 0.772 h2 20.2 0.795 l 21.9 22.2 22.5 0.862 0.874 0.886 l1 21.7 22.1 22.5 0.854 0.87 0.886 l2 17.65 18.1 0.695 0.713 l3 17.25 17.5 17.75 0.679 0.689 0.699 l4 10.3 10.7 10.9 0.406 0.421 0.429 l7 2.65 2.9 0.104 0.114 m 4.25 4.55 4.85 0.167 0.179 0.191 m1 4.73 5.08 5.43 0.186 0.200 0.214 s 1.9 2.6 0.075 0.102 s1 1.9 2.6 0.075 0.102 dia1 3.65 3.85 0.144 0.152 multiwatt15 (vertical)
revision history L5956 16/17 doc id 13852 rev 2 5 revision history table 5. document revision history date revision changes 29-aug-2007 1 initial release. 08-jan-2010 2 updated figure 1 , 2 , 3 , 5 and 7 . added figure 4: maximum esr for stability valid for all the regulators outputs on page 10 .
L5956 doc id 13852 rev 2 17/17 please read carefully: information in this document is provided solely in connection with st products. stmicroelectronics nv and its subsidiaries (?st ?) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described he rein at any time, without notice. all st products are sold pursuant to st?s terms and conditions of sale. purchasers are solely responsible for the choice, selection and use of the st products and services described herein, and st as sumes no liability whatsoever relating to the choice, selection or use of the st products and services described herein. no license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. i f any part of this document refers to any third party products or services it shall not be deemed a license grant by st for the use of such third party products or services, or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoev er of such third party products or services or any intellectual property contained therein. unless otherwise set forth in st?s terms and conditions of sale st disclaims any express or implied warranty with respect to the use and/or sale of st products including without limitation implied warranties of merchantability, fitness for a parti cular purpose (and their equivalents under the laws of any jurisdiction), or infringement of any patent, copyright or other intellectual property right. unless expressly approved in writing by an authorized st representative, st products are not recommended, authorized or warranted for use in milita ry, air craft, space, life saving, or life sustaining applications, nor in products or systems where failure or malfunction may result in personal injury, death, or severe property or environmental damage. st products which are not specified as "automotive grade" may only be used in automotive applications at user?s own risk. resale of st products with provisions different from the statements and/or technical features set forth in this document shall immediately void any warranty granted by st for the st product or service described herein and shall not create or extend in any manner whatsoev er, any liability of st. st and the st logo are trademarks or registered trademarks of st in various countries. information in this document supersedes and replaces all information previously supplied. the st logo is a registered trademark of stmicroelectronics. all other names are the property of their respective owners. ? 2010 stmicroelectronics - all rights reserved stmicroelectronics group of companies australia - belgium - brazil - canada - china - czech republic - finland - france - germany - hong kong - india - israel - ital y - japan - malaysia - malta - morocco - philippines - singapore - spain - sweden - switzerland - united kingdom - united states of america www.st.com

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