SC4525A View Datasheet(PDF) - Semtech Corporation
Part Name
Description
MFG CO.
'SC4525A' PDF : 19 Pages View PDF
SC4525A
Block Diagram
COMP
6
FB
7
ROSC
3
-
+ EA
+
SLOPE
COMP S +
+
V1
+
PWM
-
FREQUENCY
FOLDBACK
OSCILLATOR
+
ISEN
-
OC
+
ILIM
20mV
-
BST
8
S
Q
R
CLK
IN
2
4.1mW
POWER
TRANSISTOR
SS/EN
5
+
A1
-
R
1.23V
R
1V
1.9V
REFERENCE
& THERMAL
SHUTDOWN
FAULT
SOFT-START
AND
OVERLOAD
HICCUP
CONTROL
1
SW
1
GND
4
Figure 2. SC4525A Block Diagram
SS/EN
1.9V
IC
2mA
+-B4
B1
1V/2.15V
S
Q
R
B2
OVERLOAD
FAULT
ID
3.5mA
_S
Q
R
B3
OC
PWM
Figure 3. Soft-start and Overload Hiccup Control Circuit
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