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LTC3125 Datasheet(PDF) 13 Page - Linear Technology

Part # LTC3125
Description  1.2A Synchronous Step-Up DC/DC Converter with Input Current Limit
PDF  18 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3125 Datasheet(HTML) 13 Page - Linear Technology

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LTC3125
13
3125fa
PC Card (3.3V/1000mA Maximum) 4.5V Output, GPRS, Class 10 Pulsed Load
CS
2.7μH*
LTC3125
GND
VIN
2.74M
2200μF**
3
55mΩ
TANT
10μF
CER
VOUT
4.5V, 2A PULSED LOAD
(1154μs PW, 4.6ms PERIOD)
VIN
PC CARD VCC
3.3V ±10%
1000mA MAX
1M
3125 TA04a
SHDN
PROG
VOUT
FB
22.6k
SW
OFF ON
*WURTH 7440420027
**VISHAY 592D228X6R3X220H
Waveforms of Input Current,
VOUT for Pulsed Load Current
VOUT
100mV/DIV
INPUT CURRENT
500mA/DIV
LOAD CURRENT
2A/DIV
1ms/DIV
VIN = 3.3V
VOUT = 4.5V
COUT = 6.6mF
L = 2.7μH
RPROG = 22.6k
3125 TA04b
Single Supercap Charger
CS
2.2μH*
LTC3125
GND
VIN
1.07M
SC**
10F
60mΩ
10μF
CER
VOUT
2.5V
VIN
3.3V ±10%
1000mA MAX
1M
3125 TA05a
SHDN
PROG
VOUT
FB
22.6k
SW
OFF ON
*COILTRONICS SD3118-2R2-R
**COOPER B1325-2R5106-R
Waveforms of Input Current,
VOUT for Pulsed Load Current
VOUT
500mV/DIV
INPUT CURRENT
500mA/DIV
LOAD CURRENT
1A/DIV
200ms/DIV
VIN = 3.3V
VOUT = 2.5V
COUT = 10F
L = 2.2μH
RPROG = 22.6k
3125 TA05b
TYPICAL APPLICATIONS



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