參數(shù)資料
型號: LTC3125EDCB#TRMPBF
廠商: LINEAR TECHNOLOGY CORP
元件分類: 穩(wěn)壓器
英文描述: SWITCHING REGULATOR, 1900 kHz SWITCHING FREQ-MAX, PDSO8
封裝: 3 X 2 MM, 0.75 MM HEIGHT, LEAD FREE, PLASTIC, DFN-8
文件頁數(shù): 6/16頁
文件大?。?/td> 292K
代理商: LTC3125EDCB#TRMPBF
LTC3125
14
3125f
TYPICAL APPLICATIONS
Stacked Supercap Charger
3.3V to 5V with Selectable Input Current Limit
CS
2.2μH*
LTC3125
GND
VIN
2.74M
100k
10μF
CER
VOUT
4.5V
30F**
2.3V
VIN
2.5V TO 5V
500mA MAX
1M
*TDK VLF4014ST-2R2M1R9
**PANASONIC EECHWOD306
3125 TA06a
SHDN
PROG
VOUT
FB
44.2k
SW
OFF ON
+
30F**
2.3V
+
CS
2.2μH*
LTC3125
GND
VIN
3.2M
COUT
10μF
CER
VOUT
5V
VIN
3.3V ±10%
1M
*TDK VLF4014ST-2R2M1R9
3125 TA07a
SHDN
PROG
M1
VOUT
FB
44.2k
28.7k
SW
OFF ON
300mA 500mA
Waveforms of Input Current, VOUT During Charging
Waveforms of Input Current, VOUT for Pulsed Input Current Limit
VOUT
2V/DIV
SHDN
5V/DIV
LOAD CURRENT
200mA/DIV
20s/DIV
VIN = 4.5V
VOUT = 4.5V
COUT_SERIES = 15F
L = 2.2μH
RPROG = 44.2k
3125 TA06b
INPUT CURRENT
200mA/DIV
M1 GATE DRIVE
5V/DIV
2ms/DIV
VIN = 3.3V
VOUT = 5V
COUT = 4.4mF
L = 2.2μH
ILOAD = 500mA
3125 TA07b
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