L4953 multifunction voltage regulator for car radio 3 outputs: 10v (500ma); 5v (1a); 5v (100ma) standby out1 (10v) and out2 (5v) with inde- pendent enable control for stand- by mode 3a high side driver with clamped output (16v) logic output for: C supply undervoltage (lvw) C overvoltage C thermal protection reset function ignition comparator reverse battery and load dump protection thermal shutdown description the L4953 contains a triple voltage regulator and a power switch. the ic includes a monitoring circuit to warn if a low voltage or no voltage condition is occuring. in stand-by output is active as long as possible even when in thermal shutdown or any other fault conditions. the stcap pin allows the use of a reserve sup- ply capacitor that will hold enough energy for the 5v stand-by line to allow the m p to store data. june 2000 ? 5v, 100ma regulator stand-by load dump and rev batt prot ref gen 5v, 1000ma regulator switched 10v, 500ma regulator switched 16v, 3a voltage clamp switched overvoltage undervoltage thermal prot reset vcap vref1 lvw threshold vref2 reset threshold ignition threshold prot v s 7 pow gnd 3 en 5v 1 stcap 12 en 10v 2 en 16v 15 11 stand-by 5v 9 out 5v 10 out 10v 4 out 16v 14 13 6 ign out lvw/fault reset ign inp 5 d94au053a sig gnd 8 block diagram multiwatt 15 ordering number: L4953 1/6
absolute maximum ratings symbol parameter value unit v sdc dc operating supply voltage C14 to 28 v v str transient supply voltage 50 v i o output current internally limited t op operating temperature range C40 to 85 c t stg storage temperature C55 to 150 c thermal data symbol parameter value unit r th j-case thermal resistance junction-case 2 c/w 1 2 3 4 5 6 7 9 10 11 8 stby5v out 8.25v out 5v pgnd v s ignout igninp out 16v sgnd en 8.25v en 5v tab connected to pin 8 13 14 15 12 en 16v reset lvw/fault stcap d94au054b pin connection (top view) L4953 2/6
electrical characteristics (v s = 14v, t amb = 25 c, unless otherwise specified.) symbol parameter test condition min. typ. max. unit v s operating supply voltage 11 18 v en output noise voltage any reg. supply, f = 100hz to 200khz 200 400 m v 5v stand-by output voltage v 5st-by stand-by output voltage no load 4.75 5 5.25 v d v line line regulation 11v < v s < 16v 5 50 mv d v load load regulation 5ma < i o < 100ma 45 150 mv v dropout dropout voltage i out = 100ma v s = 5.5v 0.2 0.6 v i qst-by quiescent current @ stand-by i l = 5ma 0.3 0.65 ma 5v/1000ma switched output voltage v out5 5v output voltage no load 4.75 5 5.25 v d v line line regulation 7v < v s < 18v 5 50 mv d v load load regulation 5ma < i o < 1a 12 50 mv v dropout dropout voltage i o = 1a v s = 5,5v 1 1.5 v i q quiescent current i o = 1a 30 100 ma i lim current limit output shorted to gnd 1 1.3 a swon switch on 3.5 v sw off switch off 1.5 v sw hyst switch hysteresis 100 200 500 mv r in input impedance 10 40 k w 10v/500ma switched output voltage v out10 10v output voltage no load 9.5 10 10.5 v d v line line regulation 11v < v s < 18v 5 50 mv d v load load regulation 5ma < i o < 500ma 12 50 mv v dropout dropout voltage 5.5v < v s < 10v i o = 500ma 0.4 0.9 v i q quiescent current i o = 500ma 10 50 ma i lim current limit output shorted to gnd 500 600 ma svr supply voltage rejection f = 3khz 45 db swon switch on 3.5 v sw off switch off 1.5 v sw hyst switch hysteresis 100 200 500 mv r in input impedance 10 40 k w high side driver with clamped output (16v) v out16 max. output voltage v s = 18v 14.6 16.2 v i o output continuous current v s = 16v 2 a v dropout dropout voltage 6v < v in < 15v i o = 1a 0.4 0.9 v swon switch on 3.5 v sw off switch off 1.5 v sw hyst switch hysteresis 100 200 500 mv r in input impedance 10 40 k w L4953 3/6
electrical characteristics (continued) fault symbol parameter test condition min. typ. max. unit th fault fault threshold 7 8.5 v hyst fault fault threshold hysteresis 100 200 300 mv out fault fault output voltage 1.5 v i leak fault leakage current 50 m a reset thon reset reset on threshold 4.5 5.15 v hyst reset reset threshold hysteresis 75 175 300 mv out reset reset output voltage 1.5 v i leak reset leakage current 5 m a ignition th ign ign comparator positive threshold 5.567.5v hyst ign ign comparator threshold hysteresis 100 300 500 mv ign high ignition comparator output high 3.5 vst-by v ign low ignition comparator output low C0.5 1.5 v L4953 4/6
multiwatt15 v dim. mm inch min. typ. max. min. typ. max. a 5 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 0.870 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 4.63 5.08 5.53 0.182 0.200 0.218 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 outline and mechanical data L4953 5/6
information furnished is believed to be accurate and reliable. however, stmicroelectronics assumes no responsib ility for the cons equences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. no license is granted by implication or otherwise under any patent or patent rights of stmicroelectronics. specification mentioned in this pu blication are subject to change without notice. this publication supersedes and replaces all information previously supplied. stmicroelectron ics products are not authorized for use as critical components in life support devices or systems without express written approval of stmicr oelectronics. the st logo is a registered trademark of stmicroelectronics ? 2000 stmicroelectronics C printed in italy C all rights reserved stmicroelectronics group of companies australia - brazil - china - finland - france - germany - hong kong - india - italy - japan - malaysia - malta - morocco - singapore - spain - sweden - switzerland - united kingdom - u.s.a. http://www.st.com L4953 6/6
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