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L4955V5.1 Datasheet(PDF) 7 Page - STMicroelectronics

Part # L4955V5.1
Description  5A ULDO LINEAR REGULATORS FAMILY
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L4955V5.1 Datasheet(HTML) 7 Page - STMicroelectronics

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PG
VADJ
0.9 VADJ
hyst = 200mV
High
Low
Low
t
t
D96IN364B
VOUT=VADJ (R1+R2)/R2
Figure 14: Power Good Function
VINH
Vref = 1.26V
hyst = 200mV
regulator
OFF
t
t
regulator
ON
regulator
ON
D96IN365A
Figure 15: Inhibit Function
01
23
45
0
10
20
30
40
50
60
70
80
90
10 0
Io u t [ A ]
R i p p le R e je c t io n [ d B ]
Fr ip p le= 12 0H z
Vr i ppl e = 3V p- p
Fr ip p l e= 1 0 kH z
Vr i p p l e= 0. 5 V p - p
Fr ip p l e = 1 k Hz
V r i p p l e= 0. 5 V p - p
F r ippl e= 5 0 kH z
V r i p pl e= 0. 5 V p- p
C in = 22uF
C out = 2 2uF
V o u t = 1 . 26V
Vinm i n = 4 . 5 V
Figure 13: Ripple Rejection vs. Output Current
L4955
L4955
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