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SC4503 Datasheet(PDF) 5 Page - Semtech Corporation

Part # SC4503
Description  1.3MHz Step-Up Switching Regulator with 1.4A Switch
PDF  22 Pages
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Manufacturer  SEMTECH [Semtech Corporation]
Direct Link  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC4503 Datasheet(HTML) 5 Page - Semtech Corporation

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5
 2007 Semtech Corp.
www.semtech.com
SC4503
POWER MANAGEMENT
Block Diagram
REF NOT READY
EA
-
FB
2
REFERENCE
VOLTAGE
IN
5
4
SHDN/SS
SHUTDOWN
THERMAL
1.25V
+
+
R
Q
S
PWM
CLK
-
+
+
+
-
ISEN
ILIM
+
-
I-LIMIT
ΣΣΣΣ
GND
2
SW
1
OSCILLATOR
SLOPE COMP
R
SENSE
T > 155
°°°°C
J
1V
+
-
Q1
D1
Q2
Z1
Q3
Figure 2. SC4503 Block Diagram



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