sc1102cstr Semtech Corporation, sc1102cstr Datasheet - Page 7

• Manufacturer Part Number: sc1102cstr
• Description: Synchronous Voltage Mode Controller For Distributed Power Supply Applications
• Manufacturer: Semtech Corporation

POWER MANAGEMENT
Application Circuit
2006 Semtech Corp.
PWRGD
OVP
R1
1k
+5V
1.74k
R2
C1
opt.
C2
0.1
R3
1k
MBR0520
D1
R4
10
1
2
3
4
5
6
7
VCC
PWRGD
OVP
OCSET
PHASE
DRVH
PGND
Typical 12V Application Circuit with Bootstrapped BSTH
SC1102
U1
SS/SHDN
SENSE
DRVL
VREF
BSTH
BSTL
GND
14
13
12
11
10
9
8
C3
0.1
C4
1.0
SHDN
VREF
R6
2.2
R5
3.9
MBRA130
D2
7
STP40NE
STP40NE
Q1
Q2
C9
1.0
Optional
D3
MBRD1035
4uH
L1
C5
10.0
NOTE:
*) Vout = 1.265 x (1+R9/R8)
R8
127
C10
180/4V
C6
270/16V
SC1102/SC1102A
C11
180/4V
R9
205*
C7
270/16V
C12
180/4V
C8
270/16V
C13
180/4V
Vin 12V
+
_
C14
180/4V
www.semtech.com
Vout=3.3V*
+
_