L4954 quad multifunction voltage regulator for car radio 4 regulators 10v (40ma); 8.5v (175ma); 5v (650ma); 5v (100ma) standby 10v and 5v stand by regulators are low dropout outputs 3 high side drivers: 2a (hsd1), 0.3a (hsd2 & hsd3) no external charge pump capaci- tors are required stand by mode controlled by 3 in- put pins: en1 for reg1, reg2, reg3 and hsd1, en2 for hsd2, and en3 for hsd3 individual thermal shutdown logic outputs for supply under- voltage: (lvwarn, reset) independent current limiting overvoltage shutdown short circuit protection load dump protection and overvol- tage shutdown description L4954 is a quad output voltage regulator and a three output high side driver. the ic includes monitoring circuitry to warn the microprocessor of a low voltage condition: the lvwarn, output, sensing the slow dropping of stcap pins voltage, gives the microprocessor time to store data. a reset output is generated at reg4s decay. external protection must be provided for reverse battery protection. june 2000 ? reg1 10v, 40ma voltage reference reg2 8.5v, 175ma reg3 5v, 650ma reg4 5v, 100ma v s reset lvwarn en1 en2 10v-reg1 8.5v-reg2 5v-reg3 5v-reg4-stby en3 d95au346 gnd stcap current limit reset lvw output control thermal shutdown overvoltage protection hsd1 2.0a hsd2 0.3a hsd3 0.3a hsd1 hsd2 hsd3 block diagram ordering number: L4954 multiwatt15 1/7
absolute maximum ratings symbol parameter value unit v s dc operating supply voltage -0.6 to 26.5 v v s transient supply overvoltages, rise time = 10ms delay time = 115ms 34 v v s,ovs overvoltage shutdown 27 v v in input voltages (en1, en2, en3) -0.6 to 6.0 v v out output voltages (lvwarn, reset) -0.6 to 6.0 v t op operating temperature range -40 to 85 c t stg storage temperature range -40 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 en2 en1 reset gnd lvwarn 5v reg4-stby st cap hsd3-0.3a hsd2-0.3a v s hsd1-2a tab connected to pin 8 13 14 15 12 10v reg1 8.5v reg2 5v reg3 en3 d95au347 pin connection +v s 1000 m f 0.1 m f 2 10 11 en1 en2 12 en3 1 hsd1 3 hsd2 4 hsd3 5 stcap 0.1 m f 15 8 0.1 m f 47k w 47k w 7 9 6 10 m f(*) 10 m f(*) 10 m f(*) 14 13 10 m f(*) 10v-reg1 8.5v-reg2 5v-reg3 5v-reg4 -stby lvwarn reset d95au348c L4954 470 m f (*)esr of output capacitors should be between 0.2 w to 5.0 w application circuit L4954 2/7
electrical characteristics (refer to the application circuit, v s = 14.4v; t amb = 25c; i out10 = 5ma; i out8.5 = 5ma; i out5 = 5ma; i out5 st-by = 0.5ma; r hsd1 = 16 w , r hsd2,3 = 107 w , unless otherwise specified.) symbol parameter test condition min. typ. max. unit v s operating supply voltage 11 16 v iq maximum quiescent current i out10 = 40ma; i out8.5 = 175ma; i out5 = 650ma; i out5 st-by = 100ma; r hsd1 = 8 w ; r hsd2,3 = 53 w 10 ma i q,st-by standby quiescent current en1, en2, en3 = 0 i out5, st-by = 50ma; 420 m a en1, en2, en3 = 0 i out5, st-by = 2ma; 300 m a v enl en1, en2, en3 input low voltage 0 0.8 v v enh en1, en2, en3 input high voltage (outputs active) 25v 10v / 40ma reg 1 output v out10 output voltage i out10 = 40ma 10 v d v line line regulation v s = 11 to 26v 2 mv d v load load regulation i out10 = 5 to 40ma 2 mv v dropout dropout voltage v s = v out10 + 0.1v i out10 = 5ma 100 200 mv v s = v out10 + 0.5v i out10 = 40ma 500 600 mv i q1 reg 1quiescent current i out10 = 5ma 7 ma i out10 = 40ma 7 ma i lim1 current limit 100 ma svr 1 reg 1supply voltage rejection f = 0.12 to 10khz; i out10 = 25ma; v rip = 1v pp 55 db 8.5v / 175ma reg 2 output v out8.5 output voltage i out8.5 = 175ma 8.5 v d v line line regulation v s = 11 to 26v 2 mv d v load load regulation i out8.5 = 5 to 175ma 10 mv v dropout dropout voltage v s = v out8.5 + 0.3v i out8.5 = 5ma 300 400 mv v s = v out8.5 + 1v i out8.5 = 175ma 1 1.1 v i q2 reg 2 quiescent current i out8.5 = 5ma 7 ma i out8.5 = 175ma 7 ma i lim2 current limit 300 ma svr 2 reg 1supply voltage rejection f = 0.12 to 10khz; i out8.5 = 100ma; v rip = 1v pp 55 db L4954 3/7
electrical characteristics (continued) symbol parameter test condition min. typ. max. unit 5v / 650ma reg 3 output v out5 output voltage i out5 = 650ma 5 v d v line line regulation v s = 7 to 26v 2 mv d v load load regulation i out5 = 5 to 650ma 9 mv v dropout dropout voltage v s = v out5 + 0.3v i out5 = 5ma 300 400 mv v s = v out5 + 1v i out5 = 650ma 1 1.1 v i q3 reg 3 quiescent current i out5 = 5ma 7 ma i out5 = 650ma 7 ma i lim3 current limit 1.25 a svr 3 reg 3 supply voltage rejection f = 0.12 to 10khz; i out5 = 325ma; v rip = 1v pp 55 db 5v / 100ma stand-by reg 4 output v out5stby output voltage i out5stby = 100ma 5 v d v line line regulation v s = 7 to 26v 0.8 mv d v load load regulation i out = 0.5 to 100ma 3.5 mv v dropout dropout voltage v s = v reg5stby + 0.1v i out5stby = 5ma 100 200 mv v s = v reg5stby + 0.5v i out5stby = 100ma 500 600 mv i q4 reg 4 quiescent current i out5stby = 2ma 0.25 ma i out5stby = 100ma 0.35 ma i lim4 current limit 190 ma svr 4 reg 4 supply voltage rejection f = 0.12 to 10khz i out5stby = 50ma; v rip = 1v pp 55 db 2a hsd1 v sat,peak maximum output current saturation voltage r hsd1 = 8 w 600 mv i q quiescent current 9 ma i lim current limit r hsd1 = 0.5 w 3.5 a i leak1 output leakage current all driver outputs are off 20 m a 0.3a hsd2 & hsd3 v sat maximum output current saturation voltage r hsd2,3 = 53 w 150 mv i q quiescent current 1.5 ma i lim current limit r hsd2.3 = 0.5 w 500 ma i leak2,3 output leakage current all driver outputs are off 10 m a L4954 4/7
functional description the L4954 includes a monitoring circuit to warn the microprocessor if a low voltage or no voltage condition is occurring. when the voltage on the stcap pin drops below 7.5v (typ), the lvw output will go low. this tells the microprocessor to stop executing code and save vital information. the reset output will go low when reg4 (5v-stby) drops below (v reg4 - 250mv) or 4.75v is minimum value. the reset output doesnt go above 0.4v until reg4 has gone back above 4.75v (min). any spike will tell the microprocessor to start op- erating. once the stcap line passes 7.5v (typ), the lvwarn output will also return to high state. the stcap pin acts like a delay circuit. due to the large capacitor (470 m f), the stcap pin al- lows the battery voltage to decay slowly giving the microprocessor time to store data. also, during short low voltage or negative voltage conditions, the stcap pin protects the 5v stby output from dropping below the reset and lvw trip points. the four outputs are expected to fol- low the battery voltage down to 11v for reg1, 9v for reg2, 6v for reg3 and reg4. the L4954 has a stby mode to keep the micro- processor and memories alive during an ignition off conditions. the en1 input pin is controlled by the microprocessor. a high on the en1 input turns on reg1, reg2, reg3, and hsd1. a low on en1 places the part in stand-by mode with reg4 on. the high side driver outputs hsd2 and hsd3 are controlled by en2 and en3 respectively: a low on the control input turns the corresponding high side driver off. electrical characteristics (continued) symbol parameter test condition min. typ. max. unit lvwarn output th lvw lvw threshold on stcap 7.5 v v lvw lvw output voltage stcap <7.5v; v il = "0" 0 0.4 v stcap >7.5v v ih = "1" 2.75 5 v t rise lvw output rise time c lvw = 0.1 m f 3.9 ms t fall lvw output fall time c lvw = 0.1 m f 12.6 m s reset output th res reset threshold on reg 4 4.5 v v res reset output voltage set v s so that v out5stby <4.5v; v il = "0" 0 0.4 v set v s so that v out5stby is not less than normal reg4 output voltage; v ih = "1" 2.75 5 v t rise reset output rise time c reset = 0.1 m f 4.5 ms t fall reset output fall time c reset = 0.1 m f 37 m s stcap (v) 0 7.5 7.5 time 4.75 4.75 reg4 (v) 5 0 5 0.4 5 lvwarn (v) reset (v) time time time d95au349a timing diagram L4954 5/7
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 L4954 6/7
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