Datasheet

LTC3125
13
3125fa
PC Card (3.3V/1000mA Maximum) 4.5V Output, GPRS, Class 10 Pulsed Load
CS
2.7µH*
LTC3125
GND
V
IN
2.74M
2200µF**
s3
55m
TANT
10µF
CER
V
OUT
4.5V, 2A PULSED LOAD
(1154µs PW, 4.6ms PERIOD)
V
IN
PC CARD V
CC
3.3V ±10%
1000mA MAX
1M
3125 TA04a
SHDN
PROG
V
OUT
FB
22.6k
SW
OFF ON
*WURTH 7440420027
**VISHAY 592D228X6R3X220H
Waveforms of Input Current,
V
OUT
for Pulsed Load Current
V
OUT
100mV/DIV
INPUT CURRENT
500mA/DIV
LOAD CURRENT
2A/DIV
1ms/DIVV
IN
= 3.3V
V
OUT
= 4.5V
C
OUT
= 6.6mF
L = 2.7µH
R
PROG
= 22.6k
3125 TA04b
Single Supercap Charger
CS
2.2µH*
LTC3125
GND
V
IN
1.07M
SC**
10F
60m
10µF
CER
V
OUT
2.5V
V
IN
3.3V ±10%
1000mA MAX
1M
3125 TA05a
SHDN
PROG
V
OUT
FB
22.6k
SW
OFF ON
*COILTRONICS SD3118-2R2-R
**COOPER B1325-2R5106-R
Waveforms of Input Current,
V
OUT
for Pulsed Load Current
V
OUT
500mV/DIV
INPUT CURRENT
500mA/DIV
LOAD CURRENT
1A/DIV
200ms/DIVV
IN
= 3.3V
V
OUT
= 2.5V
C
OUT
= 10F
L = 2.2µH
R
PROG
= 22.6k
3125 TA05b
TYPICAL APPLICATIONS