Datasheet

15
LTC1174
LTC1174-3.3/LTC1174-5
1174fe
Positive-to-Negative (– 3.3V) Converter
Negative Boost Converter
1174 TA07
INPUT VOLTAGE
4V TO 13.5V
3
LTC1174HV-3.3
LB
IN
LB
OUT
I
PGM
GND
V
IN
SHUTDOWN
V
OUT
SW
2
7
6
8
1
5
4
L1
†
50µH
V
OUT
–3.3V
210mA
33µF**
20V
×2
D1
0.1µF
100µF***
10V
×2
*LOW-
BATTERY
INDICATOR
4.7K
220k
43k
*
**
***
D1
†
LOW-BATTERY INDICATOR
IS SET TO TRIP AT V
IN
= 4.4V
AVX TPSD336K020
AVX TPSD105K010
= MBRS140T3 (SURFACE MOUNT)
1N5818
L1 SELECTION
MANUFACTURER
COILTRONICS
COILCRAFT
SUMIDA
GOWANDA
PART NO.
CTX50-3
DT3316-473
CD54-470
GA10-472K
TYPE
SURFACE MOUNT
SURFACE MOUNT
SURFACE MOUNT
THROUGH HOLE
I
OUT MAX
(mA)
175
205
230
255
V
IN
(V)
4
5
6
7
+
+
1174 TA08
INPUT VOLTAGE
–5V
3
LTC1174-3.3
LB
IN
LB
OUT
I
PGM
GND
V
IN
SHUTDOWN
V
OUT
SW
2
7
6
8
1
5
4
L1
†
50µH
V
OUT
–9V
175mA
33µF*
16V
×2
D1
0.1µF
33µF*
20V
×2
310k
50k
*
D1
†
AVX TPSD336K020
= MBRS140T3 (SURFACE MOUNT)
1N5818
L1 SELECTION
0.1µF
MANUFACTURER
COILTRONICS
COILCRAFT
SUMIDA
GOWANDA
PART NO.
CTX50-3
DT3316-473
CD54-470
GA10-472K
TYPE
SURFACE MOUNT
SURFACE MOUNT
SURFACE MOUNT
THROUGH HOLE
+
+
TYPICAL APPLICATIO S
U