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参数资料
| 型号： | LTC3225EDDB-1#TRMPBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 0.175 A SWITCHED CAPACITOR CONVERTER, 1500 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封装： | 3 X 2 MM, LEAD FREE, PLASTIC, MO-229WECD-1, DFN-10 |
| 文件页数： | 1/14页 |
| 文件大小： | 263K |
| 代理商： | LTC3225EDDB-1#TRMPBF |
LTC3225/LTC3225-1
1
3225fb
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
150mA Supercapacitor
Charger
The LTC
3225/LTC3225-1 are programmable supercapaci-
tor chargers designed to charge two supercapacitors in
series to a selectable xed output voltage (4.8V/5.3V for
the LTC3225 and 4V/4.5V for the LTC3225-1) from input
supplies as low as 2.8V to 5.5V. Automatic cell balancing
prevents overvoltage damage to either supercapacitor. No
balancing resistors are required.
Low input noise, low quiescent current and low external
parts count (one ying capacitor, one bypass capacitor at
VIN and one programming resistor) make the LTC3225/
LTC3225-1 ideally suited for small battery-powered
applications.
Charge current level is programmed with an external
resistor. When the input supply is removed, the LTC3225/
LTC3225-1 automatically enter a low current state, drawing
less than 1μA from the supercapacitors.
The LTC3225/LTC3225-1 are available in a 10-lead 2mm
× 3mm DFN package.
n Low Noise Constant Frequency Charging of Two
Series Supercapacitors
n Automatic Cell Balancing Prevents Capacitor
Overvoltage During Charging
n Programmable Charge Current (Up to 150mA)
n Selectable 2.4V or 2.65V Regulation per Cell
(LTC3225)
n Selectable 2V or 2.25V Regulation per Cell
(LTC3225-1)
n Automatic Recharge
n IVIN = 20μA in Standby Mode
n ICOUT < 1μA When Input Supply is Removed
n No Inductors
n Tiny Application Circuit (2mm
× 3mm DFN Package,
All Components <1mm High)
n Current Limited Applications with High Peak Power
Loads (LED Flash, PCMCIA Tx Bursts, HDD Bursts,
GPRS/GSM Transmitter)
n Backup Supplies
Charging Prole with 30% Mismatch
in Output Capacitance, CTOP < CBOT
L, LT, LTC and LTM are registered trademarks and ThinSOT is a trademark of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
VIN
C+
C–
SHDN
VSEL
ON/OFF
OUTPUT
PROGRAMMING
COUT
CX
GND
PGOOD
PROG
LTC3225
LTC3225-1
100k
0.6F
12k
3225 TA01a
1μF
2.2μF
VOUT
4.8V/5.3V (LTC3225)
4V/4.5V (LTC3225-1)
VIN
2.8V/3V TO 5.5V
SHDN
5V/DIV
VCOUT
2V/DIV
VTOP-VBOT
200mV/DIV
IVIN
300mA/DIV
5 SEC/DIV
3225 TA01b
LTC3225
VSEL = VIN
RPROG = 12k
CTOP = 1.1F
CBOT = 1.43F
CTOP INITIAL VOLTAGE = 0V
CBOT INITIAL VOLTAGE = 0V
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3225EDDB-TRMPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:150mA Supercapacitor Charger |
| LTC3225EDDB-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:150mA Supercapacitor Charger |
| LTC3226 | 制造商:LINER 制造商全称:Linear Technology 功能描述:2-Cell Supercapacitor Charger |
| LTC3226_12 | 制造商:LINEAR 制造商全称:LINEAR 功能描述:2-Cell Supercapacitor Charger with Backup |
| LTC3226EUD | 制造商:LINEAR 制造商全称:LINEAR 功能描述:2-Cell Supercapacitor Charger with Backup PowerPath Controller |
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