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L4948 数据表(PDF) 4 Page - STMicroelectronics

部件名 L4948
功能描述  QUAD VOLTAGE REGULATOR WITH INHIBIT AND RESET
PDF  9 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

L4948 数据表(HTML) 4 Page - STMicroelectronics

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ELECTRICAL CHARACTERISTICS (continued)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
VO2
Rev. Voltage Trans.
VS = -35V; RO = 100
Ω t ≤ 1ms
Check VO2, standard Tamb =25
°C;
all temps
7.75
7.60
8
8
8.25
8.40
V
V
VO2
Rev. Voltage .
VS = -15V; t = 30s; RO = 100
Ω
-0.4
1
V
Ripple rejection
fO =1KHz; 1VppAC ; VS =14V
IO1 = 180mA; IO2 = 200mA;
IO3 = 400mA; IO4 = 40mA;
50
dB
fO =10KHz; 1VppAC ; VS =14V
IO1 = 180mA; IO2 = 200mA;
IO3 = 400mA; IO4 = 40mA;
50
dB
∆VO2
Line Regulation
∆VO2 across VS range
VS = 10.5V to 26V
40
mV
VO3
Output Voltage
IO3 = 600mA; Tamb =25
°C;
all temps
4.85
4.75
5
5
5.15
5.25
V
V
∆VO3
Line Regulation
VS = 7V to 26V
40
mV
∆VO3
Load Regulation
IO3 = 4 to 600mA
100
mV
∆IQ
Quiescent Current (
∆IS)VS = 14V; IO3 = 4mA;
VS = 14V; IO3 = 600mA;
8
40
mA
mA
VS-VO3
Dropout Voltage
IO3 = 600mA
set VS =VO3+1V; Tamb =25
°C;
set VS =VO3+1.5V;all
400
600
mV
mV
IL
Current Limit (Foldback) note 1
VO3 = 0V
720
1440
mA
VO3
Max Bat.Trans.
RO = 100
Ω
Ramp VS from 14 to 60V in 3-5ms
6
V
Hold VS at 60V for 10ms
Ramp VS from60 to 14V in 3-5ms;
Tamb =25
°C;
all temps
4.85
4.75
5
5
2
5.15
5.25
V
V
V
VO3
Rev. Voltage Trans.
VS = -35V; t < 1ms; RO = 100
Ω
Check VO3, standard Tamb =25
°C;
all temps
4.85
4.75
5
5
5.15
5.25
V
V
VO3
Rev. Voltage .
VS = -15V; RO = 100
Ω
-0.4
1
V
Ripple rejection
fO =1KHz; 1VppAC ; VS =14V
IO1 = 180mA; IO2 = 200mA;
IO3 = 400mA; IO4 = 40mA;
50
dB
fO = 10KHz; 1VppAC ; VS =14V
50
dB
Output Noise
Check Output for AC noise
using a 100KHz LP filter
Check Output for AC noise
using an A weighted filter (20-
20KHz)
400
200
µV
µV
VO4
Output Voltage
IO4 = 100mA; Tamb =25
°C;
all temps
4.85
4.75
5
5
5.15
5.25
V
V
∆VO4
Line Regulation
VS = 7V to 26V
40
mV
∆VO4
Load Regulation
IO4 = 0.4 to 100mA
80
mV
∆IQ
Quiescent Current
VS = 14V; IO4 = 2mA;
VS = 14V; IO4 = 100mA;
450
20
µA
mA
VS-VO4
Dropout Voltage
IO4 = 100mA
set VS =VO4+0.5V; Tamb =25
°C;
set VS =VO4+0.8V;all temps
400
600
mV
mV
ΙL
Current Limit (Foldback) note 1
VO4 = 0V
150
300
mA
L4948
4/9



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