Datasheet

14
LTC1147-3.3
LTC1147-5/LTC1147L
sn1147 1147fds
3.3V Low Dropout High Efficiency Regulator
TYPICAL APPLICATIO S
U
1
2
3
4
8
7
6
5
V
IN
C
T
I
TH
SENSE
–
PDRIVE
GND
SENSE
+
LTC1147L
0.1µF
C
C
3300pF
R
C
1k
C
T
300pF
0.01µF
+
C
IN
33µF
25V
LTC1147 • F09
R
SENSE
**
0.22Ω
L*
220µH
Si3455DV
V
IN
10V TO 14V
+
D1
MBRS130LT3
C
OUT
100µF
16V
AVX
V
OUT
SUMIDA CDR74-221
IRC LRC-LR2010-01-R068-F
*
**
100pF
R1
1.2k
R2
6.8k
SHDN
(V
FB
)
Precision Constant Current Source
V
OUT
(V)
0
I
OUT
(A)
0.6
0.8
1.0
8
LTC1147 F10
0.4
0.2
0
2
4
6
10
V
IN
= 12.6V
I
OUT
vs V
OUT
For Figure 9
1
2
3
4
8
7
6
5
V
IN
C
T
I
TH
SENSE
–
PDRIVE
GND
SHDN
SENSE
+
LTC1147L-3.3
SHUTDOWN
0.1µF
C
C
3300pF
R
C
1k
C
T
120pF
0.01µF
+
C
IN
47µF
16V
LTC1147 • F08
R
SENSE
**
0.068Ω
L*
10µH
Si9433DY
V
IN
3.5V TO 12V
+
D1
MBRS130LT3
C
OUT
100µF
10V
AVX
V
OUT
3.3V/1.25A
SUMIDA CDR74B-100LC
IRC LRC-LR2010-01-R068-F
*
**