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SC1109CSTR Datasheet(PDF) 5 Page - Semtech Corporation

Part # SC1109CSTR
Description  SYNCHRONOUS PWM CONTROLLER WITH DUAL LOW DROPOUT REGULATOR CONTROLLERS
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Manufacturer  SEMTECH [Semtech Corporation]
Direct Link  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC1109CSTR Datasheet(HTML) 5 Page - Semtech Corporation

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SYNCHRONOUS PWM CONTROLLER WITH
DUAL LOW DROPOUT REGULATOR
CONTROLLERS
© 2000 SEMTECH CORP.
PRELIMINARY - October 16, 2000
SC1109
5
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com
BLOCK DIAGRAM
R
S
Q
STBY
VOSENSE
GND
+
-
OSCILLATOR
5VSTBY
+
-
PHASE
BCAP+
BST
SET DOMINATES
PWM
0.8V
VCC
+
-
+10%
+
-
BCAP-
+
-
0.6V
VBG
LOW
SIDE
DRIVE
200mV
+
-
SHOOT
THRU
CONTROL
LDOS1
FAULT
LOW SIDE OFF
+
-
PWRGD
2uA
-10%
DL
10uA
5VSTBY
VBG
CHARGE
PUMP
5VSTBY
+
-
GATE2
VBG
+
-
DH
VBG
R
S
Q
LDOS2
1.2V
VCC
OVER
CURRENT
Bandgap
VCC
+
-
GATE1
OSCILLATOR
5VSTBY
HIGH
SIDE
DRIVE
ERROR AMP
HICCUP LATCH
SS/EN
UVLO
SS/EN


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