SC4503 View Datasheet(PDF) - Semtech Corporation
Part Name
Description
MFG CO.
'SC4503' PDF : 22 Pages View PDF
SC4503
POWER MANAGEMENT
Block Diagram
IN
5
SHDN/SS
4
FB
2
VOLTAGE
REFERENCE
1.25V
+
EA
-
REF NOT READY
THERMAL
SHUTDOWN
TJ > 155°C
CLK
-
PWM
+
D1
Q1
+
Z1
1V
-
Q2
R
Q
S
+
ILIM
-
I-LIMIT
OSCILLATOR
+
Σ
+
SLOPE COMP
+
ISEN
-
SW
1
Q3
RSENSE
2
GND
Figure 2. SC4503 Block Diagram
2007 Semtech Corp.
5
www.semtech.com
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