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L4921 数据表(PDF) 3 Page - STMicroelectronics

部件名 L4921
功能描述  VERY LOWDROP ADJUSTABLE REGULATORS
PDF  7 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

L4921 数据表(HTML) 3 Page - STMicroelectronics

  L4921 Datasheet HTML 1Page - STMicroelectronics L4921 Datasheet HTML 2Page - STMicroelectronics L4921 Datasheet HTML 3Page - STMicroelectronics L4921 Datasheet HTML 4Page - STMicroelectronics L4921 Datasheet HTML 5Page - STMicroelectronics L4921 Datasheet HTML 6Page - STMicroelectronics L4921 Datasheet HTML 7Page - STMicroelectronics  
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(*) Foldback protection.
Note :
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.
ELECTRICAL CHARACTERISTICS (forVI =14.4V,TJ =25
°C,VO = 5V,CO =100µF,unlessOtherwiseSpeci-
fied)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
VI
Operating Input Voltage
VO
≥ 4.5V, IO = 400mA
VO + 0.7
26
V
VREF
≤ VO < 4.5V, IO = 400mA
5.2
26
V
VREF
Reference Voltage
5.2V < VI < 26V
5mA
≤ IO ≤ 400mA (*)
1.20
1.25
1.30
V
∆VO
Line Regulation
VO +1V < VI < 26V, VO
≥ 4.5V
IO = 5mA
1
10
mV/V
∆VO
Load Regulation
5mA
≤ IO ≤ 400mA (*) VO ≥ 4.5V
3
15
mV/V
VD
Dropout Voltage
IO = 10mA
IO = 150mA
IO = 400mA
0.05
0.2
0.4
0.4
0.7
V
V
V
IQ
Quiescent Current
IO = 0mA
VO +1V < VI <26V
0.8
2
mA
IO = 400mA (*)
VO +1V < VI <26V
65
90
mA
IO
Maximal Output Current
800
mA
IOSC
Short Circuit Output Current (*)
350
500
mA
(* ) F oldback pr otection
ELECTRICAL CHARACTERISTICS (for VI = 14.4V,–40
≤ TJ ≤ 125°C (note1), VO = 5V,CO =100µF, unless
Otherwise Specified)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
VI
Operating Input Voltage
VO
≥ 4.5V, IO = 400mA
VO + 0.9
26
V
VREF
≤ VO < 4.5V, IO = 400mA
5.2
26
V
VREF
Reference Voltage
5.4V < VI < 26V
1.17
1.25
1.33
V
∆VO
Line Regulation
VO + 1.2V < VI < 26V, VO
≥ 4.5V
IO = 5mA
2
15
mV/V
∆VO
Load Regulation
5mA
≤ IO ≤ 400mA (*) VO ≥ 4.5V
5
25
mV/V
VD
Dropout Voltage
IO = 150mA
IO = 400mA
0.2
0.4
0.4
0.7
V
V
IQ
Quiescent Current
IO = 0mA
VO + 1.2V < VI <26V
1,2
3
mA
IO = 400mA (*)
VO + 1.2V < VI <26V
80
140
mA
IO
Maximal Output Current
870
mA
IOSC
Short Circuit Output Current (*)
230
500
mA
L4920/L4921
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