Datasheet

LTC3125
14
3125fa
TYPICAL APPLICATIONS
Stacked Supercap Charger
CS
2.2µH*
LTC3125
GND
V
IN
2.74M
100k
100k
10µF
CER
V
OUT
4.5V
30F**
2.3V
V
IN
2.5V TO 5V
500mA MAX
1M
*TDK VLF4014ST-2R2M1R9
**PANASONIC EECHWOD306
3125 TA06a
SHDN
PROG
V
OUT
FB
44.2k
SW
OFF ON
+
30F**
2.3V
+
Waveforms of Input Current, V
OUT
During Charging
V
OUT
2V/DIV
SHDN
5V/DIV
LOAD CURRENT
200mA/DIV
20s/DIVV
IN
= 4.5V
V
OUT
= 4.5V
C
OUT_SERIES
= 15F
L = 2.2µH
R
PROG
= 44.2k
3125 TA06b