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SC1109EVB Ver la hoja de datos (PDF) - Semtech Corporation
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componentes Descripción
Fabricante
SC1109EVB
SYNCHRONOUS PWM CONTROLLER WITH DUAL LOW DROPOUT REGULATOR CONTROLLERS
Semtech Corporation
SC1109EVB Datasheet PDF : 17 Pages
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PRELIMINARY - October 16, 2000
BLOCK DIAGRAM
SYNCHRONOUS PWM CONTROLLER WITH
DUAL LOW DROPOUT REGULATOR
CONTROLLERS
SC1109
VCC
1.2V
Bandgap
-10%
+10%
VBG
UVLO
+
-
PWRGD
VOSENSE
SS/EN
-
+
-
+
VCC
VBG
-
ERROR AMP
+
10uA
0.8V
+
SS/EN
-
+
0.6V
-
OSCILLATOR
PWM
-
+
SET DOMINATES
S
Q
R
HICCUP LATCH
2uA
5VSTBY
STBY
BCAP+
CHARGE
PUMP
OVER
CURRENT
200mV
+
-
HIGH
SIDE
DRIVE
R
Q
S
SHOOT
THRU
CONTROL
VCC
LOW
SIDE
DRIVE
FAULT
5VSTBY
OSCILLATOR
LOW SIDE OFF
5VSTBY
VBG
+
-
5VSTBY
VBG
+
-
BCAP-
BST
DH
PHASE
DL
GND
GATE2
LDOS2
GATE1
LDOS1
© 2000 SEMTECH CORP.
5
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com
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