L4921 Ver la hoja de datos (PDF) - STMicroelectronics
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L4921 Datasheet PDF : 7 Pages
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L4920/L4921
ELECTRICAL CHARACTERISTICS (forVI =14.4V,TJ = 25°C, VO = 5V,CO = 100µF, unlessOtherwiseSpeci-
fied)
Symbol
Parameter
VI Operating Input Voltage
VREF Reference Voltage
∆VO Line Regulation
∆VO Load Regulation
VD Dropout Voltage
IQ Quiescent Current
IO Maximal Output Current
IOSC Short Circuit Output Current (*)
(*) Foldback protection
Test Condition
Min.
VO ≥ 4.5V, IO = 400mA
VO + 0.7
VREF ≤ VO < 4.5V, IO = 400mA
5.2
5.2V < VI < 26V
1.20
5mA ≤ IO ≤ 400mA (*)
VO + 1V < VI < 26V, VO ≥ 4.5V
IO = 5mA
5mA ≤ IO ≤ 400mA (*) VO ≥ 4.5V
IO = 10mA
IO = 150mA
IO = 400mA
IO = 0mA
VO + 1V < VI <26V
IO = 400mA (*)
VO + 1V < VI <26V
Typ.
1.25
1
3
0.05
0.2
0.4
0.8
65
800
350
Max.
26
26
1.30
10
15
0.4
0.7
2
90
500
Unit
V
V
V
mV/V
mV/V
V
V
V
mA
mA
mA
mA
ELECTRICAL CHARACTERISTICS (forVI = 14.4V,–40 ≤ TJ ≤ 125°C (note1), VO = 5V, CO = 100µF, unless
Otherwise Specified)
Symbol
Parameter
VI Operating Input Voltage
VREF
∆VO
Reference Voltage
Line Regulation
∆VO Load Regulation
VD Dropout Voltage
IQ Quiescent Current
IO Maximal Output Current
IOSC Short Circuit Output Current (*)
Test Condition
Min.
VO ≥ 4.5V, IO = 400mA
VO + 0.9
VREF ≤ VO < 4.5V, IO = 400mA
5.2
5.4V < VI < 26V
1.17
VO + 1.2V < VI < 26V, VO ≥ 4.5V
IO = 5mA
5mA ≤ IO ≤ 400mA (*) VO ≥ 4.5V
IO = 150mA
IO = 400mA
IO = 0mA
VO + 1.2V < VI <26V
IO = 400mA (*)
VO + 1.2V < VI <26V
Typ.
1.25
2
5
0.2
0.4
1,2
80
870
230
Max.
26
26
1.33
15
25
0.4
0.7
3
140
500
Unit
V
V
V
mV/V
mV/V
V
V
mA
mA
mA
mA
(*) Foldback protection.
N ote : 1. Design limits are guaranteed (but not 100% production tested) over the indicated temperatu re and supply voltage
ranges. These limits are not used to calculate outgoing quality levels.
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