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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 CAPACITORS ARE REQUIRED STAND BY MODE CONTROLLED BY 3 INPUT PINS: EN1 FOR REG1, REG2, REG3 AND HSD1, EN2 FOR HSD2, AND 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 BLOCK DIAGRAM
VS STCAP VOLTAGE REFERENCE
Multiwatt15
ORDERING NUMBER: L4954
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 generatedat REG4's decay. External protection must be provided for reverse battery protection.
REG1 10V, 40mA
10V-REG1
REG2 8.5V, 175mA
8.5V-REG2
CURRENT LIMIT
REG3 5V, 650mA
5V-REG3
RESET LVWarn
RESET LVW
REG4 5V, 100mA
5V-REG4-STBY
EN1
OUTPUT CONTROL THERMAL SHUTDOWN OVERVOLTAGE PROTECTION
HSD1 2.0A HSD2 0.3A HSD3 0.3A
HSD1
EN2
HSD2
EN3 GND
HSD3
D95AU346
June 2000
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L4954
ABSOLUTE MAXIMUM RATINGS
Symbol VS VS VS,ovs Vin V out Top Tstg Parameter DC Operating Supply Voltage Transient Supply Overvoltages, rise time = 10ms delay time = 115ms Overvoltage Shutdown Input Voltages (EN1, EN2, EN3) Output Voltages (LVWarn, RESET) Operating Temperature Range Storage Temperature Range Value -0.6 to 26.5 34 27 -0.6 to 6.0 -0.6 to 6.0 -40 to 85 -40 to 150 Unit V V V V V C C
PIN CONNECTION
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 10V REG1 8.5V REG2 5V REG3 EN3 EN2 EN1 RESET GND LVWarn 5V REG4-STBY ST CAP HSD3-0.3A HSD2-0.3A VS HSD1-2A
TAB CONNECTED TO PIN 8
D95AU347
THERMAL DATA
Symbol Rth j-case Parameter Thermal Resistance Junction-case Value 2 Unit C/W
APPLICATION CIRCUIT
+VS 1000F 0.1F
EN1 EN2 EN3 HSD1
10 11 12 1
2
15 10F(*) 14 10F(*) 13
10V-REG1
8.5V-REG2
5V-REG3 10F(*)
HSD2
3
L4954
6
10F(*) HSD3 4 7 STCAP 470F 5 8 9 0.1F 0.1F 47K 47K
5V-REG4 -STBY
LVWarn RESET
D95AU348C
(*)ESR of output capacitors should be between 0.2 to 5.0
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L4954
ELECTRICAL CHARACTERISTICS (Refer to the application circuit, V S = 14.4V; Tamb = 25C; IOUT10 = 5mA; IOUT8.5 = 5mA; IOUT5 = 5mA; IOUT5 ST-BY = 0.5mA; RHSD1 = 16, RHSD2,3 = 107, unless otherwise specified.)
Symbol VS Iq Parameter Operating Supply Voltage Maximum Quiescent Current IOUT10 = 40mA; IOUT8.5 = 175mA; IOUT5 = 650mA; IOUT5 ST-BY = 100mA; RHSD1 = 8; R HSD2,3 = 53 EN1, EN2, EN3 = 0 IOUT5, ST-BY = 50mA; EN1, EN2, EN3 = 0 IOUT5, ST-BY = 2mA; VENL VENH EN1, EN2, EN3 Input Low Voltage EN1, EN2, EN3 Input High Voltage (Outputs Active) 0 2 Test Condition Min. 11 10 Typ. Max. 16 Unit V mA
Iq,ST-BY
Standby Quiescent Current
420 300 0.8 5
A A V V
10V / 40mA REG 1 OUTPUT
VOUT10 Vline Vload VDROPOUT Output Voltage Line Regulation Load Regulation Dropout Voltage IOUT10 = 40mA VS = 11 to 26V Iout10 = 5 to 40mA VS = VOUT10 + 0.1V Iout10 = 5mA VS = VOUT10 + 0.5V Iout10 = 40mA Iq1 Ilim1 SVR 1 Reg 1Quiescent Current Current Limit Reg 1Supply Voltage Rejection f = 0.12 to 10KHz; IOUT10 = 25mA; VRIP = 1Vpp IOUT10 = 5mA IOUT10 = 40mA 10 2 2 100 500 7 7 100 55 200 600 V mV mV mV mV mA mA mA dB
8.5V / 175mA REG 2 OUTPUT
VOUT8.5 Vline Vload VDROPOUT Output Voltage Line Regulation Load Regulation Dropout Voltage IOUT8.5 = 175mA VS = 11 to 26V Iout8.5 = 5 to 175mA VS = VOUT8.5 + 0.3V Iout8.5 = 5mA VS = VOUT8.5 + 1V Iout8.5 = 175mA Iq2 Ilim2 SVR 2 Reg 2 Quiescent Current Current Limit Reg 1Supply Voltage Rejection f = 0.12 to 10KHz; IOUT8.5 = 100mA; VRIP = 1Vpp IOUT8.5 = 5mA IOUT8.5 = 175mA 8.5 2 10 300 1 7 7 300 55 400 1.1 V mV mV mV V mA mA mA dB
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L4954
ELECTRICAL CHARACTERISTICS (Continued)
Symbol Parameter Test Condition Min. Typ. Max. Unit
5V / 650mA REG 3 OUTPUT
VOUT5 Vline Vload VDROPOUT Output Voltage Line Regulation Load Regulation Dropout Voltage IOUT5 = 650mA VS = 7 to 26V Iout5 = 5 to 650mA VS = VOUT5 + 0.3V Iout5 = 5mA VS = VOUT5 + 1V Iout5 = 650mA Iq3 Ilim3 SVR 3 Reg 3 Quiescent Current Current Limit Reg 3 Supply Voltage Rejection f = 0.12 to 10KHz; IOUT5 = 325mA; VRIP = 1Vpp IOUT5 = 5mA IOUT5 = 650mA 5 2 9 300 1 7 7 1.25 55 400 1.1 V mV mV mV V mA mA A dB
5V / 100mA STAND-BY REG 4 OUTPUT
VOUT5STBY Vline Vload VDROPOUT Output Voltage Line Regulation Load Regulation Dropout Voltage IOUT5STBY = 100mA VS = 7 to 26V Iout = 0.5 to 100mA VS = VREG5STBY + 0.1V Iout5STBY = 5mA VS = VREG5STBY + 0.5V Iout5STBY = 100mA Iq4 Ilim4 SVR 4 Reg 4 Quiescent Current Current Limit Reg 4 Supply Voltage Rejection f = 0.12 to 10KHz Iout5STBY = 50mA; VRIP = 1Vpp IOUT5STBY = 2mA IOUT5STBY = 100mA 5 0.8 3.5 100 500 0.25 0.35 190 55 200 600 V mV mV mV mV mA mA mA dB
2A HSD1
Vsat,peak Iq Ilim Ileak1 Maximum Output Current Saturation Voltage Quiescent Current Current Limit Output Leakage Current R HSD1 = 0.5 All driver outputs are off R HSD1 = 8 600 9 3.5 20 mV mA A A
0.3A HSD2 & HSD3
V sat Iq Ilim Ileak2,3 Maximum Output Current Saturation Voltage Quiescent Current Current Limit Output Leakage Current R HSD2.3 = 0.5 All driver outputs are off R HSD2,3 = 53 150 1.5 500 10 mV mA mA A
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L4954
ELECTRICAL CHARACTERISTICS (Continued)
Symbol Parameter LVW Threshold on STCAP LVW Output Voltage LVW Output Rise Time LVW Output Fall Time Reset Threshold on Reg 4 Reset Output Voltage Test Condition Min. Typ. 7.5 STCAP <7.5V; VIL = "0" STCAP >7.5V VIH = "1" C LVW = 0.1F C LVW = 0.1F 0 2.75 3.9 12.6 4.5 Set VS so that VOUT5STBY <4.5V; VIL = "0" Set VS so that VOUT5STBY is not less than normal REG4 output voltage; VIH = "1" C RESET = 0.1F C RESET = 0.1F 0 2.75 0.4 5 0.4 5 Max. Unit V V V ms s V V V
LVWARN OUTPUT
THLVW VLVW trise tfall THRES VRES
RESET OUTPUT
trise tfall
Reset Output Rise Time Reset Output Fall Time
4.5 37
ms s
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 (VREG4 250mV) or 4.75V is minimum value. The RESET output doesn't go above 0.4V until REG4 has gone back above 4.75V (min). Any spike will tell the microprocessor to start operating. 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 (470F), the STCAP pin alTIMING DIAGRAM
7.5 STCAP (V) 0
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 follow 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 microprocessor 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.
7.5
TIME
4.75 5 REG4 (V) 0
4.75
TIME
5 LVWarn (V) TIME
5 RESET (V) 0.4
D95AU349A
TIME
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L4954
DIM. A B C D E F G G1 H1 H2 L L1 L2 L3 L4 L7 M M1 S S1 Dia1 1 0.49 0.66 1.02 17.53 19.6 21.9 21.7 17.65 17.25 10.3 2.65 4.25 4.63 1.9 1.9 3.65 1.27 17.78 0.55 0.75 1.52 18.03 20.2 22.2 22.1 17.5 10.7 4.55 5.08 22.5 22.5 18.1 17.75 10.9 2.9 4.85 5.53 2.6 2.6 3.85 0.862 0.854 0.695 0.679 0.406 0.104 0.167 0.182 0.075 0.075 0.144 0.874 0.870 0.689 0.421 0.179 0.200 0.019 0.026 0.040 0.690 0.772 0.050 0.700 mm TYP. inch TYP.
MIN.
MAX. 5 2.65 1.6
MIN.
MAX. 0.197 0.104 0.063
OUTLINE AND MECHANICAL DATA
0.039 0.022 0.030 0.060 0.710 0.795 0.886 0.886 0.713 0.699 0.429 0.114 0.191 0.218 0.102 0.102 0.152
Multiwatt15 V
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L4954
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences 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 publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics (c) 2000 STMicroelectronics - Printed in Italy - 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
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