LTC1771
U
TYPICAL APPLICATIONS
2.5V/1A Regulator with Foldback Current Limit
0.01µF
1
RUN/SS
8
MODE
MODE
SENSE
220pF
10k
2
7
6
5
I
TH
1000pF
LTC1771
3
4
V
V
FB
IN
V
IN
2.8V
GND
PGATE
+
C
R
TO 12V
IN
SENSE
22µF
0.1Ω
25V
1M
1%
1.02M
1%
4
5
3
6
2
1
8
I
TH
5pF
U1
1N4148
×2
22µH
V
2.5V
1A
OUT
7
U1: INTERNATIONAL RECTIFIER
FETKY TM IRF7422D2
+
C
OUT
150µF
6.3V
1771 TA06
4-NiCd Battery Charger
0.01µF
1
RUN/SS
8
MODE
MODE
SENSE
220pF
10k
2
7
I
TH
1000pF
6
LTC1771
3
4
V
V
FB
IN
V
IN
5
8V
GND
PGATE
R
+
SENSE
C
TO 18V
IN
0.1Ω
22µF
Si6447DQ
25V
UPS5817
47µH
1M
1%
4.69M
1%
V
OUT
4-NiCd
1A
+
C
OUT
5pF
UPS5817
100µF
10V
1771 TA07
14