Datasheet

LTC3125
18
3125fa
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
●
FAX: [phone]
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www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2008
LT 1210 REV A • PRINTED IN USA
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PC Card or CompactFlash (3.3V/500mA Maximum) 4.5V Output,
GSM Pulsed Load
CS
2.2µH*
LTC3125
GND
V
IN
2.74M
2200µF**
×2
55m
TANT
10µF
CER
V
OUT
4.5V, 2A PULSED LOAD
(577µs PW, 4.6ms PERIOD)
V
IN
PC CARD V
CC
3.3V ±10%
500mA MAX
1M
*COILTRONICS SD3118-2R2-R
**VISHAY 592D228X6R3X220H
3125 TA02a
SHDN
PROG
V
OUT
FB
44.2k
SW
OFF ON
Waveforms of Input Current, V
OUT
for Pulsed Load Current
V
OUT
100mV/DIV
INPUT CURRENT
200mA/DIV
LOAD CURRENT
2A/DIV
1ms/DIVV
IN
= 3.3V
V
OUT
= 4.5V
C
OUT
= 4.4mF
L = 2.2µH
R
PROG
= 44.2k
3125 TA02b
TYPICAL APPLICATION