SC1103 Semtech Corporation, SC1103 Datasheet - Page 3

• Manufacturer Part Number: SC1103
• Description: VOLTAGE MODE PWM CONTROLLER
• Manufacturer: Semtech Corporation

V
Per test circuit, unless otherwise specified.
Reference
Feedback Bias Current
Quiescent Current
Regulation Load
Regulation Line
Current Limit Threshold
Oscillator Frequency
Oscillator Frequency Shift
Max Duty Cycle
DH Sink/Source Current
UVLO Threshold
TEST CIRCUIT
© 2000 SEMTECH CORP.
PRELIMINARY - February 29, 2000
ELECTRICAL CHARACTERISTICS
CC
+12V
GND
= 11.50V to 12.50V; GND = P
+ 20 to 24V
PARAMETER
R1
10
C5
0.1
C1
0.1
R2
1k
R3
1k
C2
820/16V
C6
0.1
C3
820/16V
1
2
3
4
SYMBOL
REG
VCC
Cs(-)
Cs(+)
PGND
REG
V
OSC
OFS
V
CLT
C4
820/16V
d.c.
I
UVLO
SC1103
I
I
GND
REF
FB
U1
Q
O
LOAD
LINE
= 0V; V
GND
BST
DH
FB
VOLTAGE MODE PWM CONTROLLER
8
7
6
5
Current into V
IRL3103S
(V
Q1
V
O
CS(+) to CS(-)
CONDITIONS
I
BST
DH
= 3.3V; T
O
V
Over Temp
MBRB1530CT
C7
0.01
= 1A to 10A
FB
I
- V
- V
O
D1
< V
R4
2.7
= 10A
C8
0.1
PGND
DH
REF
= 4.5V
A
= 2V)
CC
/2
= 25°C; BST = 24+ 1V; Output current = 2A.
5.6uH
L1
pin
* NOTE: R6 = 124 x (Vout/1.25 - 1) rounded to nearest 1%value
652 MITCHELL ROAD NEWBURY PARK CA
R5
0.01
1.238
1.225
MIN
180
500
60
90
C9
1500/6.3
1.250
1.250
TYP
C10
1500/6.3
200
2.0
5.0
0.5
3.8
70
50
95
C11
1500/6.3V
C12
0.1
1.263
1.275
MAX
220
8.0
8.0
1.0
0.5
80
R6
*see note
R7
124
SC1103
Vout(+)
Vout(-)
UNITS
kHz
kHz
mA
mV
mA
uA
%
%
%
V
V
V
3