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| LTC3125_15 Datasheet, PDF (15/18 Pages) Linear Technology – 1.2A Synchronous Step-Up DC/DC Converter with Input Current Limit | |||
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TYPICAL APPLICATIONS
3.3V to 5V with Selectable Input Current Limit
2.2μH*
VIN
3.3V ±10%
10μF
CER
OFF ON
CS
SW
VIN
VOUT
LTC3125
SHDN
3.2M
VOUT
5V
COUT
PROG
FB
44.2k
GND
1M
300mA 500mA
M1 28.7k
3125 TA07a
*TDK VLF4014ST-2R2M1R9
Waveforms of Input Current,
VOUT for Pulsed Input Current Limit
INPUT CURRENT
200mA/DIV
M1 GATE DRIVE
5V/DIV
VIN = 3.3V
VOUT = 5V
COUT = 4.4mF
L = 2.2μH
ILOAD = 500mA
2ms/DIV
3125 TA07b
LTC3125
3125fa
15
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