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SC1102ASTRT

P1-P3P4-P6P7-P9P10-P12
7
2006 Semtech Corp.
www.semtech.com
POWER MANAGEMENT
SC1102/SC1102A
Application Circuit
Typical 12V Application Circuit with Bootstrapped BSTH
VCC
1
PWRGD
2
OVP
3
OCSET
4
PHASE
5
DRVH
6
PGND
7
DRVL
8
BSTL
9
BSTH
10
SENSE
11
VREF
12
SS/SHDN
13
GND
14
U1
SC1102
Q1
STP40NE
Q2
STP40NE
R5
3.9
D3
MBRD1035
R4
10
L1
4uH
D2
MBRA130
C9
1.0
C10
180/4V
C11
180/4V
C12
180/4V
C13
180/4V
C7
270/16V
C6
270/16V
R1
1k
R3
1k
C2
0.1
C3
0.1
C1
opt.
R2
1.74k
PWRGD
OVP
SHDN
VREF
+
_
+
_
Vin 12V
Vout=3.3V*
R8
127
R9
205*
NOTE:
*) Vout = 1.265 x (1+R9/R8)
+5V
D1
MBR0520
R6
2.2
C4
1.0
C5
10.0
Optional
C14
180/4V
C8
270/16V
82006 Semtech Corp.
www.semtech.com
POWER MANAGEMENT
SC1102/SC1102A
PIN Descriptions
Typical Characteristics
Output Ripple Voltage
Ch1: Vo_rpl
1. V
IN
= 5V; V
O
= 3.3V; I
OUT
= 12A
Wave forms are shown for SC1102 and are similiar for
SC1102A but at a higher frequency.
Gate Drive Waveforms
Ch1: Top FET
Ch2: Bottom FET
Ch1: Vo_rpl
2. V
IN
= 5V; V
OUT
= 1.3V; I
OUT
= 12A
Ch1: Top FET
Ch2: Bottom FET
9
2006 Semtech Corp.
www.semtech.com
POWER MANAGEMENT
SC1102/SC1102A
Ch1: Vo_rpl
2. V
IN
= 5V; V
OUT
= 1.3V; I
OUT
= 12A
Ch1: Top FET
Ch2: Bottom FET
Typical Characteristics (Cont.)
Error Amplifier, Gain and Phase
PIN Descriptions
-10
-5
0
5
10
15
20
25
30
35
40
100.0E+0 1.0E+3 10.0E+3 100.0E+3 1.0E+6 10.0E+6
Frequency (Hz)
Gain (dB)
-45
0
45
90
135
180
Phase (deg)
Gain
Phase
P1-P3P4-P6P7-P9P10-P12

SC1102ASTRT

Mfr. #:
Buy SC1102ASTRT
Manufacturer:
Semtech
Description:
Switching Controllers SYN DC/DC CONTROLLER
Lifecycle:
New from this manufacturer.
Delivery:
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