STMICROELECTRONICS L4954

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
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.
BLOCK DIAGRAM
VS
REG1
10V, 40mA
10V-REG1
VOLTAGE
REFERENCE
REG2
8.5V, 175mA
8.5V-REG2
CURRENT
LIMIT
REG3
5V, 650mA
5V-REG3
RESET
LVW
REG4
5V, 100mA
5V-REG4-STBY
STCAP
RESET
LVWarn
EN1
OUTPUT
CONTROL
HSD1
2.0A
HSD1
EN2
THERMAL
SHUTDOWN
HSD2
0.3A
HSD2
EN3
OVERVOLTAGE
PROTECTION
HSD3
0.3A
HSD3
GND
D95AU346
June 2000
1/7
L4954
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
VS
DC Operating Supply Voltage
-0.6 to 26.5
V
VS
Transient Supply Overvoltages, rise time = 10ms
delay time = 115ms
34
V
Overvoltage Shutdown
27
V
V
VS,ovs
Vin
Input Voltages (EN1, EN2, EN3)
-0.6 to 6.0
V out
Output Voltages (LVWarn, RESET)
-0.6 to 6.0
V
Top
Operating Temperature Range
-40 to 85
°C
Tstg
Storage Temperature Range
-40 to 150
°C
Value
Unit
2
°C/W
PIN CONNECTION
15
10V REG1
14
8.5V REG2
13
5V REG3
12
EN3
11
EN2
10
EN1
9
RESET
8
GND
7
LVWarn
6
5V REG4-STBY
5
ST CAP
4
HSD3-0.3A
3
HSD2-0.3A
2
VS
1
HSD1-2A
TAB CONNECTED TO PIN 8
D95AU347
THERMAL DATA
Symbol
Rth j-case
Parameter
Thermal Resistance Junction-case
APPLICATION CIRCUIT
+VS
1000µF
EN1
10
EN2
11
EN3
12
HSD1
1
HSD2
3
0.1µF
2
15
10V-REG1
10µF(*)
14
8.5V-REG2
10µF(*)
13
5V-REG3
10µF(*)
L4954
6
5V-REG4
-STBY
10µF(*)
HSD3
4
STCAP
5
47KΩ
47KΩ
7
8
LVWarn
9
470µF
RESET
0.1µF
0.1µF
D95AU348C
(*)ESR of output capacitors should be between 0.2Ω to 5.0Ω
2/7
L4954
ELECTRICAL CHARACTERISTICS (Refer to the application circuit, V S = 14.4V; Tamb = 25°C;
IOUT10 = 5mA; IOUT8.5 = 5mA; IOUT5 = 5mA; IOUT5 ST-BY = 0.5mA; RHSD1 = 16Ω, RHSD2,3 = 107Ω,
unless otherwise specified.)
Symbol
Parameter
Test Condition
Min.
Typ.
16
Unit
VS
Operating Supply Voltage
Iq
Maximum Quiescent Current
IOUT10 = 40mA; IOUT8.5 = 175mA;
IOUT5 = 650mA;
IOUT5 ST-BY = 100mA; RHSD1 = 8Ω;
R HSD2,3 = 53Ω
10
mA
Standby Quiescent Current
EN1, EN2, EN3 = 0
IOUT5, ST-BY = 50mA;
420
µA
EN1, EN2, EN3 = 0
IOUT5, ST-BY = 2mA;
300
µA
Iq,ST-BY
11
Max.
V
VENL
EN1, EN2, EN3 Input Low
Voltage
0
0.8
V
VENH
EN1, EN2, EN3 Input High
Voltage (Outputs Active)
2
5
V
10V / 40mA REG 1 OUTPUT
VOUT10
Output Voltage
IOUT10 = 40mA
10
V
∆Vline
Line Regulation
VS = 11 to 26V
2
mV
∆Vload
Load Regulation
Iout10 = 5 to 40mA
2
mV
VDROPOUT
Dropout Voltage
VS = VOUT10 + 0.1V
Iout10 = 5mA
100
200
mV
VS = VOUT10 + 0.5V
Iout10 = 40mA
500
600
mV
Iq1
Ilim1
SVR 1
Reg 1Quiescent Current
IOUT10 = 5mA
7
mA
IOUT10 = 40mA
7
mA
100
mA
f = 0.12 to 10KHz;
IOUT10 = 25mA; VRIP = 1Vpp
55
dB
Current Limit
Reg 1Supply Voltage Rejection
8.5V / 175mA REG 2 OUTPUT
VOUT8.5
Output Voltage
IOUT8.5 = 175mA
8.5
V
∆Vline
Line Regulation
VS = 11 to 26V
2
mV
∆Vload
Load Regulation
Iout8.5 = 5 to 175mA
10
mV
VDROPOUT
Dropout Voltage
VS = VOUT8.5 + 0.3V
Iout8.5 = 5mA
300
400
mV
VS = VOUT8.5 + 1V
Iout8.5 = 175mA
1
1.1
V
IOUT8.5 = 5mA
7
mA
IOUT8.5 = 175mA
7
mA
300
mA
55
dB
Iq2
Ilim2
SVR 2
Reg 2 Quiescent Current
Current Limit
Reg 1Supply Voltage Rejection
f = 0.12 to 10KHz;
IOUT8.5 = 100mA; VRIP = 1Vpp
3/7
L4954
ELECTRICAL CHARACTERISTICS (Continued)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
5V / 650mA REG 3 OUTPUT
VOUT5
Output Voltage
IOUT5 = 650mA
5
V
∆Vline
Line Regulation
VS = 7 to 26V
2
mV
∆Vload
Load Regulation
Iout5 = 5 to 650mA
9
VDROPOUT
Dropout Voltage
VS = VOUT5 + 0.3V
Iout5 = 5mA
300
400
mV
VS = VOUT5 + 1V
Iout5 = 650mA
1
1.1
V
IOUT5 = 5mA
7
mA
7
mA
Iq3
Reg 3 Quiescent Current
Ilim3
Current Limit
IOUT5 = 650mA
SVR 3
Reg 3 Supply Voltage Rejection
mV
1.25
A
f = 0.12 to 10KHz;
IOUT5 = 325mA; VRIP = 1Vpp
55
dB
5
V
mV
5V / 100mA STAND-BY REG 4 OUTPUT
VOUT5STBY
Output Voltage
IOUT5STBY = 100mA
∆Vline
Line Regulation
VS = 7 to 26V
0.8
∆Vload
Load Regulation
Iout = 0.5 to 100mA
3.5
VDROPOUT
Dropout Voltage
VS = VREG5STBY + 0.1V
Iout5STBY = 5mA
100
200
mV
VS = VREG5STBY + 0.5V
Iout5STBY = 100mA
500
600
mV
IOUT5STBY = 2mA
0.25
mA
IOUT5STBY = 100mA
0.35
mA
190
mA
Iq4
Reg 4 Quiescent Current
Ilim4
Current Limit
SVR 4
mV
Reg 4 Supply Voltage Rejection
f = 0.12 to 10KHz
Iout5STBY = 50mA; VRIP = 1Vpp
55
dB
Maximum Output Current
Saturation Voltage
R HSD1 = 8Ω
600
mV
2A HSD1
Vsat,peak
Iq
Quiescent Current
9
mA
Ilim
Current Limit
R HSD1 = 0.5Ω
3.5
A
Output Leakage Current
All driver outputs are off
20
µA
R HSD2,3 = 53Ω
150
mV
Ileak1
0.3A HSD2 & HSD3
V sat
Iq
Quiescent Current
1.5
mA
Ilim
Current Limit
R HSD2.3 = 0.5Ω
500
mA
Output Leakage Current
All driver outputs are off
10
µA
Ileak2,3
4/7
Maximum Output Current
Saturation Voltage
L4954
ELECTRICAL CHARACTERISTICS (Continued)
Symbol
Parameter
Test Condition
Min.
STCAP <7.5V; VIL = ”0”
STCAP >7.5V VIH = ”1”
C LVW = 0.1µF
C LVW = 0.1µF
0
2.75
Typ.
Max.
Unit
LVWARN OUTPUT
THLVW
VLVW
trise
tfall
LVW Threshold on STCAP
LVW Output Voltage
LVW Output Rise Time
LVW Output Fall Time
7.5
0.4
5
3.9
12.6
V
V
V
ms
µs
RESET OUTPUT
THRES
VRES
trise
tfall
Reset Threshold on Reg 4
Reset Output Voltage
Reset Output Rise Time
Reset Output Fall Time
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 = 0.1µF
C RESET = 0.1µF
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 (470µF), the STCAP pin al-
0
0.4
V
V
2.75
5
V
4.5
37
ms
µs
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.
TIMING DIAGRAM
7.5
7.5
STCAP
(V)
0
TIME
4.75
4.75
5
REG4
(V)
TIME
0
5
LVWarn
(V)
TIME
5
RESET
(V)
0.4
D95AU349A
TIME
5/7
L4954
DIM.
MIN.
mm
TYP.
A
B
C
D
E
F
MAX.
MIN.
1
0.49
0.66
1.02
17.53
19.6
L
L1
21.9
21.7
L2
L3
L4
L7
1.27
17.78
MAX.
0.197
0.104
0.063
5
2.65
1.6
G
G1
H1
H2
OUTLINE AND
MECHANICAL DATA
0.039
0.55
0.75
0.019
0.026
1.52
18.03
0.040
0.690
0.772
0.022
0.030
0.050
0.700
20.2
0.060
0.710
0.795
22.2
22.1
22.5
22.5
0.862
0.854
17.65
17.25
10.3
2.65
17.5
10.7
18.1
17.75
10.9
2.9
M
M1
4.25
4.63
4.55
5.08
S
S1
Dia1
1.9
1.9
3.65
6/7
inch
TYP.
0.874
0.870
0.886
0.886
0.695
0.679
0.406
0.104
0.689
0.421
0.713
0.699
0.429
0.114
4.85
5.53
0.167
0.182
0.179
0.200
0.191
0.218
2.6
2.6
3.85
0.075
0.075
0.144
0.102
0.102
0.152
Multiwatt15 V
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.
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