QUAD MULTIFUNCTION VOLTAGE REGULATOR RADIO REGULATORS (40mA); 8.5
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L4954
QUAD MULTIFUNCTION VOLTAGE REGULATOR RADIO
REGULATORS (40mA); 8.5V (175mA); (650mA); (100mA) STANDBY STAND REGULATORS DROPOUT OUTPUTS HIGH SIDE DRIVERS: (HSD1), 0.3A (HSD2 HSD3) EXTERNAL CHARGE PUMP CAPACITORS REQUIRED STAND MODE CONTROLLED INPUT PINS: REG1, REG2, REG3 HSD1, HSD2, HSD3 INDIVIDUAL THERMAL SHUTDOWN LOGIC OUTPUTS SUPPLY UNDERVOLTAGE: (LVWARN, RESET) INDEPENDENT CURRENT LIMITING OVERVOLTAGE SHUTDOWN SHORT CIRCUIT PROTECTION LOAD DUMP PROTECTION OVERVOLTAGE SHUTDOWN DESCRIPTION L4954 quad output voltage regulator BLOCK DIAGRAM
STCAP VOLTAGE REFERENCE
Multiwatt15
ORDERING NUMBER: L4954
three output high side driver. includes monitoring circuitry warn microprocessor voltage condition: LVWarn, output, sensing slow dropping STCAP pins voltage, gives microprocessor time store data. RESET output generatedat REG4's decay. External protection must provided reverse battery protection.
REG1 10V, 40mA
10V-REG1
REG2 8.5V, 175mA
8.5V-REG2
CURRENT LIMIT
REG3 650mA
5V-REG3
RESET LVWarn
RESET
REG4 100mA
5V-REG4-STBY
OUTPUT CONTROL THERMAL SHUTDOWN OVERVOLTAGE PROTECTION
HSD1 2.0A HSD2 0.3A HSD3 0.3A
HSD1
HSD2
HSD3
D95AU346
June 2000
L4954
ABSOLUTE MAXIMUM RATINGS
Symbol VS,ovs Tstg Parameter 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 26.5 -0.6 -0.6 Unit
CONNECTION
REG1 8.5V REG2 REG3 RESET LVWarn REG4-STBY HSD3-0.3A HSD2-0.3A HSD1-2A
CONNECTED
D95AU347
THERMAL DATA
Symbol j-case Parameter Thermal Resistance Junction-case Value Unit °C/W
APPLICATION CIRCUIT
1000µF 0.1µF
HSD1
10µF(*) 10µF(*)
10V-REG1
8.5V-REG2
5V-REG3 10µF(*)
HSD2
L4954
10µF(*) HSD3 STCAP 470µF 0.1µF 0.1µF
5V-REG4 -STBY
LVWarn RESET
D95AU348C
(*)ESR output capacitors should between
L4954
ELECTRICAL CHARACTERISTICS (Refer application circuit, 14.4V; Tamb 25°C; IOUT10 5mA; IOUT8.5 5mA; IOUT5 5mA; IOUT5 ST-BY 0.5mA; RHSD1 RHSD2,3 107, unless otherwise specified.)
Symbol Parameter Operating Supply Voltage Maximum Quiescent Current IOUT10 40mA; IOUT8.5 175mA; IOUT5 650mA; IOUT5 ST-BY 100mA; RHSD1 HSD2,3 EN1, EN2, IOUT5, ST-BY 50mA; EN1, EN2, IOUT5, ST-BY 2mA; VENL VENH EN1, EN2, Input Voltage EN1, EN2, Input High Voltage (Outputs Active) Test Condition Min. Typ. Max. Unit
Iq,ST-BY
Standby Quiescent Current
40mA OUTPUT
VOUT10 Vline Vload VDROPOUT Output Voltage Line Regulation Load Regulation Dropout Voltage IOUT10 40mA Iout10 40mA VOUT10 0.1V Iout10 VOUT10 0.5V Iout10 40mA Ilim1 1Quiescent Current Current Limit 1Supply Voltage Rejection 0.12 10KHz; IOUT10 25mA; VRIP 1Vpp IOUT10 IOUT10 40mA
8.5V 175mA OUTPUT
VOUT8.5 Vline Vload VDROPOUT Output Voltage Line Regulation Load Regulation Dropout Voltage IOUT8.5 175mA Iout8.5 175mA VOUT8.5 0.3V Iout8.5 VOUT8.5 Iout8.5 175mA Ilim2 Quiescent Current Current Limit 1Supply Voltage Rejection 0.12 10KHz; IOUT8.5 100mA; VRIP 1Vpp IOUT8.5 IOUT8.5 175mA
L4954
ELECTRICAL CHARACTERISTICS (Continued)
Symbol Parameter Test Condition Min. Typ. Max. Unit
650mA OUTPUT
VOUT5 Vline Vload VDROPOUT Output Voltage Line Regulation Load Regulation Dropout Voltage IOUT5 650mA Iout5 650mA VOUT5 0.3V Iout5 VOUT5 Iout5 650mA Ilim3 Quiescent Current Current Limit Supply Voltage Rejection 0.12 10KHz; IOUT5 325mA; VRIP 1Vpp IOUT5 IOUT5 650mA 1.25
100mA STAND-BY OUTPUT
VOUT5STBY Vline Vload VDROPOUT Output Voltage Line Regulation Load Regulation Dropout Voltage IOUT5STBY 100mA Iout 100mA VREG5STBY 0.1V Iout5STBY VREG5STBY 0.5V Iout5STBY 100mA Ilim4 Quiescent Current Current Limit Supply Voltage Rejection 0.12 10KHz Iout5STBY 50mA; VRIP 1Vpp IOUT5STBY IOUT5STBY 100mA 0.25 0.35
HSD1
Vsat,peak Ilim Ileak1 Maximum Output Current Saturation Voltage Quiescent Current Current Limit Output Leakage Current HSD1 driver outputs HSD1
0.3A HSD2 HSD3
Ilim Ileak2,3 Maximum Output Current Saturation Voltage Quiescent Current Current Limit Output Leakage Current HSD2.3 driver outputs HSD2,3
L4954
ELECTRICAL CHARACTERISTICS (Continued)
Symbol Parameter Threshold STCAP Output Voltage Output Rise Time Output Fall Time Reset Threshold Reset Output Voltage Test Condition Min. Typ. STCAP <7.5V; STCAP >7.5V 0.1µF 0.1µF 2.75 12.6 that VOUT5STBY <4.5V; that VOUT5STBY less than normal REG4 output voltage; RESET 0.1µF RESET 0.1µF 2.75 Max. Unit
LVWARN OUTPUT
THLVW VLVW trise tfall THRES VRES
RESET OUTPUT
trise tfall
Reset Output Rise Time Reset Output Fall Time
FUNCTIONAL DESCRIPTION L4954 includes monitoring circuit warn microprocessor voltage voltage condition occurring. When voltage STCAP drops below 7.5V (typ), output will low. This tells microprocessor stop executing code save vital information. reset output will when REG4 (5V-STBY) drops below (VREG4 250mV) 4.75V minimum value. RESET output doesn't above 0.4V until REG4 gone back above 4.75V (min). spike will tell microprocessor start operating. Once STCAP line passes 7.5V (typ), LVWarn output will also return high state. STCAP acts like delay circuit. large capacitor (470µF), STCAP alTIMING DIAGRAM
STCAP
lows battery voltage decay slowly giving microprocessor time store data. Also, during short voltage negative voltage conditions, STCAP protects STBY output from dropping below RESET trip points. four outputs expected follow battery voltage down REG1, REG2, REG3 REG4. L4954 STBY mode keep microprocessor memories alive during ignition conditions. input controlled microprocessor. high input turns REG1, REG2, REG3, HSD1. places part stand-by mode with REG4 High side driver outputs HSD2 HSD3 controlled respectively: control input turns corresponding high side driver off.
TIME
4.75 REG4
4.75
TIME
LVWarn TIME
RESET
D95AU349A
TIME
L4954
DIM. Dia1 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 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 4.85 5.53 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 TYP. inch TYP.
MIN.
MAX. 2.65
MIN.
MAX. 0.197 0.104 0.063
OUTLINE 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
L4954
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