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july 2010 doc id 17719 rev 1 1/13 1 l4954 quad multifunction voltag e regulator for car radio features 4 regulators: ? 10 v (40 ma) low dropout ? 8.5 v (175 ma) ?5 v (650 ma) ? 5 v (100 ma) standby 3 high side drivers: ?2 a (hsd1) ? 0.3 a (hsd2 & hsd3) no external charge pump capacitors are required standby mode controlled by 3 input pins: ? en1 for reg1, reg2, reg3 and hsd1 ? en2 for hsd2 ? en3 for hsd3 individual thermal shutdown logic outputs for supply undervoltage: ? lvwarn ?reset independent current limiting overvoltage shutdown short circuit protection load dump protection and overvoltage 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 reg4?s decay. external protection must be provided for reverse battery protection. multiwatt15 table 1. device summary order code package packing l4954 multiwatt15 tube www.st.com
contents l4954 2/13 doc id 17719 rev 1 contents 1 block and pins connection diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2 electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.1 absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.2 thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.3 application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.4 electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3 functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 4 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 5 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
l4954 list of tables doc id 17719 rev 1 3/13 list of tables table 1. device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 table 2. absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 table 3. thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 table 4. electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 table 5. document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
list of figures l4954 4/13 doc id 17719 rev 1 list of figures figure 1. block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 figure 2. pins connection diagram (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 figure 3. application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 figure 4. timing diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 figure 5. multiwatt15 mechanical data and package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
l4954 block and pins connection diagrams doc id 17719 rev 1 5/13 1 block and pins connection diagrams figure 1. block diagram figure 2. pins connection diagram (top view) 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 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
electrical specifications l4954 6/13 doc id 17719 rev 1 2 electrical specifications 2.1 absolute maximum ratings 2.2 thermal data 2.3 application circuit figure 3. application circuit table 2. 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 = 10 ms ,delay time = 115 ms 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 table 3. thermal data symbol parameter value unit r th j-case thermal resistance junction-to-case 2 c/w +v s 1000 f 0.1 f 2 10 11 en1 en2 12 en3 1 hsd1 3 hsd2 4 hsd3 5 stcap 0.1 f 15 8 0.1 f 47k 47k 7 9 6 10 f(*) 10 f(*) 10 f(*) 14 13 10 f(*) 10v-reg1 8.5v-reg2 5v-reg3 5v-reg4 -stby lvwarn reset d95au348c l4954 470 f ( * ) esr of out p ut ca p acitors should be between 0.2 to 5.0
l4954 electrical specifications doc id 17719 rev 1 7/13 2.4 electrical characteristics refer to the figure 3: application circuit , v s = 14.4 v; t amb = 25 c; i out10 = 5 ma; i out8.5 = 5 ma; i out5 = 5 ma; i out5 st-by = 0.5 ma; r hsd1 = 16 , r hsd2,3 = 107 , unless otherwise specified. table 4. electrical characteristics symbol parameter test cond ition min. typ. max. unit v s operating supply voltage - 11 - 16 v i q maximum quiescent current i out10 = 40 ma; i out8.5 = 175 ma; i out5 = 650 ma; i out5st-by = 100ma; r hsd1 = 8 ; r hsd2,3 = 53 - 10 - ma i q,st-by standby quiescent current en1, en2, en3 = 0 i out5, st-by = 50 ma -420 -ma en1, en2, en3 = 0 i out5, st-by = 2 ma -300 -ma v enl en1, en2, en3 input low voltage -0 -0.8 v v enh en1, en2, en3 input high voltage (outputs active) -2 -5 v 10 v / 40 ma reg 1 output v out10 output voltage i out10 = 40 ma - 10 - v v line line regulation v s = 11 to 26 v - 2 - mv v load load regulation i out10 = 5 to 40 ma - 2 - mv v dropout dropout voltage v s = v out10 + 0.1 v i out10 = 5 ma - 100 200 mv v s = v out10 + 0.5 v i out10 = 40 ma - 500 600 mv i q1 reg 1 quiescent current i out10 = 5 ma - 7 - ma i out10 = 40 ma - 7 - ma i lim1 current limit - - 100 - ma svr1 reg 1 supply voltage rejection f = 0.12 to 10 khz; i out10 = 25 ma; v rip =1 vpp - 55 - db 8.5v / 175 ma reg 2 output v out8.5 output voltage i out8.5 = 175 ma - 8.5 - v v line line regulation v s = 11 to 26 v - 2 - mv v load load regulation i out8.5 = 5 to 175 ma - 10 - mv v dropout dropout voltage v s = v out8.5 + 0.3 v i out8.5 = 5 ma - 300 400 mv v s = v out8.5 +1 v i out8.5 = 175 ma - - 1.1 v
electrical specifications l4954 8/13 doc id 17719 rev 1 i q2 reg 2 quiescent current i out8.5 = 5 ma - 7 - ma i out8.5 = 175 ma - 7 - ma i lim2 current limit - 300 - ma 5 v / 650 ma reg 3 output v out5 output voltage i out5 = 650 ma - 5 - v v line line regulation v s = 7 to 26 v - 2 - mv v load load regulation i out5 = 5 to 650ma - 9 - mv v dropout dropout voltage v s = v out5 + 0.3 v i out5 = 5 ma - 300 400 mv v s = v out5 +1 v i out5 = 650ma - 1 1.1 v i q3 reg 3 quiescent current i out5 = 5 ma - 7 - ma i out5 = 650 ma - 7 - ma i lim3 current limit - - 1.25 - a svr3 reg 3 supply voltage rejection f = 0.12 to 10 khz; i out5 = 325 ma; v rip =1 vpp - 55 - db 5v / 100 ma standby reg 4 output v out5stby output voltage i out5stby = 100 ma - 5 - v v line line regulation v s = 7 to 26 v - 0.8 - mv v load load regulation i out = 0.5 to 100 ma - 3.5 - mv v dropout dropout voltage v s = v reg5stby + 0.1 v i out5stby = 5ma - 100 200 mv v s = v reg5stby + 0.5 v i out5stby = 100 ma - 500 600 mv i q4 reg 4 quiescent current i out5stby = 2 ma - 0.25 - ma i out5stby = 100 ma - 0.35 - ma i lim4 current limit - - 190 - ma svr4 reg 4 supply voltage rejection f = 0.12 to 10 khz i out5stby = 50 ma; v rip =1 vpp - 55 - db 2 a hsd1 v sat,peak maximum output current saturation voltage r hsd1 = 8 -600 -mv i q quiescent current - - 9 - ma i lim current limit r hsd1 = 0.5 -3.5 -a i leak1 output leakage current all driver outputs are off - 20 - ma table 4. electrical characteristics (continued) symbol parameter test cond ition min. typ. max. unit
l4954 electrical specifications doc id 17719 rev 1 9/13 0.3 a hsd2 & hsd3 v sat maximum output current saturation voltage r hsd2,3 = 53 -150 -mv i q quiescent current - - 1.5 - ma i lim current limit r hsd2.3 = 0.5 -500 -ma i leak2,3 output leakage current all driver outputs are off - 10 - a svr2 reg 1supply voltage rejection f = 0.12 to 10 khz; i out8.5 = 100 ma; v rip =1vpp - 55 - db lvwarn output th lv w lvw threshold on stcap - - 7.5 - v v lvw lvw output voltage stcap < 7.5 v; v il = ?0? 0 - 0.4 v stcap > 7.5 v v ih = ?1? 2.75 - 5 v t rise lvw output rise time c lv w = 0.1 f -3.9 -ms t fall lvw output fall time - 12.6 - s reset output t hres reset threshold on reg 4 - - 4.5 - v v res reset output voltage set vs so that v out5stby < 4.5 v; v il = ?0? 0 - 0.4 v set v s so that v out5stby is not less than normal reg 4 output voltage; v ih = ?1? 2.75 - 5 v t rise reset output rise time c reset =0.1 f -4.5 -ms t fall reset output fall time - 37 - s table 4. electrical characteristics (continued) symbol parameter test cond ition min. typ. max. unit
functional description l4954 10/13 doc id 17719 rev 1 3 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 7.5 v (typ), the lvw output goes low. this tells the microprocessor to stop executing code and save vital information. the reset output goes low when reg4 (5 v - standby) drops below (v reg4 -250 mv) or 4.75 v is minimum value. the reset output doesn?t go above 0.4v until reg4 has gone back above 4.75 v (min). any spike tells the microprocessor to start operating. once the stcap line passes 7.5 v (typ), the lvwarn output also returns to high state. the stcap pin acts like a delay circuit. due to the large capacitor (470 f), the stcap pin allows the battery voltage to decay slowly gi ving the microprocessor time to store data. also, during short low voltage or negative voltage conditions, the stcap pin protects the 5 v standby output from dropping below the r eset and lvw trip points. the four outputs are expected to follow the battery voltage down to 11 v for reg1, 9 v for reg2, 6 v for reg3 and reg4. the l4954 has a standby mode to keep the microprocessor and memories alive during 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. figure 4. timing diagram 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
l4954 package information doc id 17719 rev 1 11/13 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 5. multiwatt15 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 (ver tical)
revision history l4954 12/13 doc id 17719 rev 1 5 revision history table 5. document revision history date revision changes 12-jul-2010 1 initial release.
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