SC4524 Semtech Corporation, SC4524 Datasheet - Page 5

• Manufacturer Part Number: SC4524
• Description: 2A Output 30V Step-Down Switching Regulator
• Manufacturer: Semtech Corporation

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POWER MANAGEMENT
Block Diagrams
2006 Semtech Corp.
ROSC
COMP
FB
SS
6
7
3
5
FAULT
FAULT
SS
SS
Figure 3. Details of the Soft-Start and Overload Hiccup Control Circuit
+
-
EA
FB
FB
0.7V
0.7V
1V
REFERENCE
SHUTDOW N
& THERMA L
Figure 2. SC4524 Functional Diagram
SLOPE COMP
OSCILLATOR
+
+
-
-
0.7V
2.6mA
2.6mA
SLO PE
COMP
+
-
1.8mA
1.8mA
PWM
FAULT
1V/2 V
1V/2 V
CLK
5
SLOPE
COMP
S
+
+
S
R
Q
ILIM
Soft-Start
O verload
+
Hiccup
Control
-
And
FB
S
S
R
R
20m V
Q
Q
ISEN
+
-
BST
8
OVLD
OVLD
OVLD
2
1
4
TRANSISTOR
POWER
6.3mW
SW
GND
VIN
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SC4524