Datasheet

LTC3125
15
3125fa
TYPICAL APPLICATIONS
3.3V to 5V with Selectable Input Current Limit
CS
2.2µH*
LTC3125
GND
V
IN
3.2M
C
OUT
10µF
CER
V
OUT
5V
V
IN
3.3V ±10%
1M
*TDK VLF4014ST-2R2M1R9
3125 TA07a
SHDN
PROG
M1
V
OUT
FB
44.2k
28.7k
SW
OFF ON
300mA 500mA
Waveforms of Input Current,
V
OUT
for Pulsed Input Current Limit
INPUT CURRENT
200mA/DIV
M1 GATE DRIVE
5V/DIV
2ms/DIVV
IN
= 3.3V
V
OUT
= 5V
C
OUT
= 4.4mF
L = 2.2µH
I
LOAD
= 500mA
3125 TA07b