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L4943 数据表(PDF) 3 Page - STMicroelectronics

部件名 L4943
功能描述  MULTIFUNCTION VOLTAGE REGULATOR FOR CAR RADIO
PDF  6 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

L4943 数据表(HTML) 3 Page - STMicroelectronics

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ELECTRICAL CHARACTERISTICS (Referred to Test & Application Circuit; VS = 14.4V; Tamb = 25°C;
unless otherwise specified).
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
5V STAND-BY
Vout Mem
Output Voltage
no load; 1+R1/R2 = 2.4
no load; 1+R1/R2 = 4
no load; 1+R1/R2 = 5.6
2.85
4.75
6.65
3
5
7
3.15
5.25
7.35
V
V
V
∆Vline
Line Regulation
no load; 11<Vs<18V
5
50
mV
∆Vload
Load Regulation
5mA < IO < 500mA
8
80
mV
Vdropout
Dropout Voltage
IO = 200mA, VO = 5V
IO = 500mA, VO = 5V
0.36
0.9
0.5
1.25
V
V
Ilim
Current Limit
Out short to GND
550
800
1000
mA
Iqst-by
Quiescent Current
IO = 100
µA; EN1 = EN2 =0
IO = 500mA; EN1 = EN2 = 5V
0.35
10
0.5
25
mA
mA
ADJUSTABLE REG1 SWITCHED
Voutadj
Output Voltage
no load; 1+R3/R4 = 2.4
no load; 1+R3/R4 = 4
no load; 1+R3/R4 = 8.8
2.85
4.75
10.45
3
5
11
3.15
5.25
11.55
V
V
V
∆Vline
Line Regulation
no load
0.7
7
mV/V
∆Vload
Load Regulation
5mA < IO < 500mA
8
80
mV
Vdropout
Dropout Voltage
IO = 200mA, VO = 5V
IO = 500mA, VO = 5V
IO = 200mA, VO = 11V
IO = 500mA, VO = 11V
0.45
1.1
0.4
1
0.6
1.5
0.55
1.4
V
V
V
V
Ilim
Current Limit
Out short to GND
550
800
1000
mA
Iq2
Quiescent Current
IO = 500mA
10
25
mA
SVR
Supply Voltage Rejection
f = 0.1 to 10kHz, VO = 5V
45
55
dB
EN1 on
EN ADJ1 ON
2
V
EN1 off
EN ADJ1 OFF
1V
ADJUSTABLE REG2 SWITCHED
Voutadj
Output Voltage
no load; 1+R3/R4 = 2.4
no load; 1+R5/R6 = 4
no load; 1+R3/R4 = 8.8
2.85
4.75
10.45
3
5
11
3.15
5.25
11.55
V
V
V
∆Vline
Line Regulation
no load
0.7
7
mV/V
∆Vload
Load Regulation
5mA < IO < 500mA
12
80
mV
Vdropout
Dropout Voltage
IO = 200mA, VO = 5V
IO = 500mA, VO = 5V
IO = 200mA, VO = 11V
IO = 500mA, VO = 11V
0.45
1.1
0.4
1
0.6
1.5
0.55
1.4
V
V
V
V
Ilim
Current Limit
Out short to GND
550
800
1100
mA
Iq3
Quiescent Current
IO = 500mA
10
25
mA
SVR
Supply Voltage Rejection
f = 0.1 to 10kHz, VO = 5V
45
55
dB
EN2H on2
EN ADJ2 ON
1.3
V
EN2H off2
EN ADJ2 OFF
0.5
V
400mA HSD SWITCHED
Vdropout
Dropout Voltage
IO = 400mA, 9V < VS < 16V
0.2
0.6
V
Ilim
Current Limit
0.45
0.65
0.8
A
Iqhsd
Quiescent Current
IO = 400mA
10
25
mA
EN2 on H
EN HSD ON
2.5
V
EN2 off H
EN HSD OFF
1.7
V
EN2 Gap
EN HSD ON minus EN ADJ2
ON
1V
L4943
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