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SC4524C 데이터 시트보기 (PDF) - Semtech Corporation
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SC4524C
28V 2A Step-Down Switching Regulator
Semtech Corporation
SC4524C Datasheet PDF : 22 Pages
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SC4524C
Block Diagram
COMP
6
FB
7
-
+ EA
+
V1
SLOPE
COMP
+
S
+
+
ISEN
-
OC
+
ILIM
18mV
-
BST
8
ROSC
3
FREQUENCY
FOLDBACK
+
PWM
-
OSCILLATOR
S
Q
R
CLK
SS/EN
5
A1
+
-
R
1.2V
R
1V
1.9V
REFERENCE
& THERMAL
SHUTDOWN
FAULT
SOFT-START
AND
OVERLOAD
HICCUP
CONTROL
Figure 2 — SC4524C Block Diagram
IN
2
5.5m
W
POWER
TRANSISTOR
1
SW
GND
4
SS/EN
1.9V
IC
2.4
m
A
-
+
B4
B1
1V/2.15V
S
Q
R
B2
OVERLOAD
FAULT
ID
3.9
m
A
_S
Q
R
B3
OC
PWM
Figure 3 — Soft-start and Overload Hiccup Control Circuit
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