Datasheet

13
LTC1174
LTC1174-3.3/LTC1174-5
1174fe
TYPICAL APPLICATIO S
U
High Efficiency 3.3V Regulator
6V to 5V Step-Down Regulator with Low-Battery Detection
1174 TA03
INPUT VOLTAGE
6V
3
LTC1174-5
LB
IN
LB
OUT
I
PGM
GND
V
IN
SHUTDOWN
V
OUT
SW
2
7
6
8
1
5
4
L1
†
100µH
V
OUT
5V
365mA
47µF**
16V
×2
D1
0.1µF
*LOW-
BATTERY
INDICATOR
4.7k
162k
47.5k
*
**
D1
†
LOW-BATTERY INDICATOR
IS SET TO TRIP AT V
IN
= 5.5V
AVX TPSD476K016
= MBRS140T3 (SURFACE MOUNT)
1N5818
L1 SELECTION
MANUFACTURER
COILTRONICS
SUMIDA
GOWANDA
PART NO.
CTX100-4
CD75-101
GA10-103K
TYPE
SURFACE MOUNT
SURFACE MOUNT
THROUGH HOLE
+
47µF**
16V
×2
+
1174 TA04
3
LTC1174-3.3
LB
IN
LB
OUT
I
PGM
GND
V
IN
SHUTDOWN
V
OUT
SW
2
7
6
8
1
5
4
50µH
†
V
OUT
3.3V
425mA
22µF*
25V
×3
1N5818
0.1µF
47µF**
16V
×2
INPUT VOLTAGE
4V TO 12.5V
*
**
†
AVX TPSD226K025
AVX TPSD476K016
COILTRONICS CTX50-4
+
+