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参数资料
| 型号： | LTC3240EDC-3.3#TRMPBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/12页 |
| 文件大小： | 0K |
| 描述： | IC REG MULTI CONFIG 3.3V 6DFN |
| 标准包装： | 1 |
| 类型： | 降压（降压），升压（升压），切换电容（充电泵） |
| 输出类型： | 固定 |
| 输出数： | 1 |
| 输出电压： | 3.3V |
| 输入电压： | 1.8 V ~ 5.5 V |
| PWM 型： | Burst Mode? |
| 频率 - 开关： | 1.2MHz |
| 电流 - 输出： | 150mA |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 6-WFDFN 裸露焊盘 |
| 包装： | 剪切带 (CT) |
| 供应商设备封装： | 6-DFN-EP（2x2） |
| 产品目录页面： | 1339 (CN2011-ZH PDF) |
| 其它名称： | LTC3240EDC-3.3#TRMPBFCT |
LTC3240-3.3/LTC3240-2.5
3.3V/2.5V Step-Up/
Step-Down Charge Pump
DC/DC Converter
FEATURES
DESCRIPTIO
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Step-Up/Step-Down Charge Pumps Generate Fixed
3.3V or 2.5V Outputs
V IN Range: 1.8V to 5.5V
Output Current up to 150mA
Automatic Mode Switching
Constant Frequency (1.2MHz) Operation in
Step-Up Mode
Low Dropout Regulator Operation in
Step-Down Mode
Low No-Load Quiescent Current: I Q = 65μA
Built-In Soft-Start Reduces Inrush Current
Shutdown Disconnects Load from Input
Shutdown Current < 1μA
Short-Circuit/Thermal Protection
Available in a 6-Lead (2mm × 2mm) DFN Package
The LTC ? 3240-3.3/LTC3240-2.5 are step-up/step-down
charge pump DC/DC converters that produce a ?xed
regulated output voltage of 3.3V or 2.5V over a wide input
voltage range (1.8V to 5.5V).
With input voltages greater than the regulated output
voltage the LTC3240 operates as a low dropout regulator.
Once the input voltage drops within 100mV of the regulated
output voltage the part automatically switches to step-up
mode. In step-up mode the LTC3240 operates as a constant
frequency (1.2MHz) doubling charge pump.
The LTC3240-3.3/LTC3240-2.5 feature low no load operat-
ing current (65μA typical) and ultralow operating current
in shutdown (<1μA). Built-in soft-start circuitry prevents
excessive inrush current during start-up. Thermal shut-
down and current-limit circuitry allow the parts to survive
APPLICATIO S
a continuous short-circuit from V OUT to GND.
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2 AA to 2.5V
2-3 AA/Li-Ion to 3.3V
Low Power Supplies for Cameras, I/O Supplies,
Audio, PC Cards, Misc. Logic, etc., in a Wide Variety
of Handheld Products
The LTC3240-3.3/LTC3240-2.5 require only three tiny
external ceramic capacitors for an ultrasmall application
footprint. The LTC3240-3.3/LTC3240-2.5 are available in a
6-pin (2mm × 2mm) DFN package.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
Protected by U.S. Patents including 6411531.
TYPICAL APPLICATIO
Output Voltage vs Input Voltage (Full Range)
Li-Ion to 3.3V at Up to 150mA
1 μ F
3.50
3.45
3.40
I OUT = 30mA
2.7V TO 4.5V
Li-Ion OR
3-CELL NiMH
1 μ F
OFF ON
C – C +
V IN V OUT
LTC3240-3.3
GND
SHDN
3.3V
I OUT = 150mA
4.7 μ F
3.35
3.30
3.25
3.20
3240 TA01a
3.15
3.10
1.7
2.2
2.7
3.2
3.7
4.2
4.7
5.2
5.7
INPUT VOLTAGE (V)
3240 TA01b
3240fb
1
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相关代理商/技术参数 |
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| LTC3245 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Wide VIN Range, Low Noise, 250mA Buck-Boost Charge Pump |
| LTC3245EDE#PBF | 制造商:Linear Technology 功能描述:Charge Pump STPUP/STPDN 2.5V to 5V/3.3V/5V 250mA 12-Pin DFN EP 制造商:Linear Technology 功能描述:IC REG MULTI CONFIG .25A 12DFN 制造商:Linear Technology 功能描述:DC-DC CONV, BUCK/BOOST, FIXED/ADJ, 450KHZ, DFN-12; Primary Input Voltage:38V; No. of Outputs:1; Output Current:250mA; No. of Pins:12; Operating Temperature Min:-40C; Operating Temperature Max:125C; Package / Case:12-DFN ;RoHS Compliant: Yes |
| LTC3245EDE#TRPBF | 制造商:Linear Technology 功能描述:IC REG MULTI CONFIG .25A 12DFN 制造商:Linear Technology 功能描述:DC-DC CONV, BUCK/BOOST, FIXED/ADJ, 450KHZ, DFN-12; Primary Input Voltage:38V; No. of Outputs:1; Output Current:250mA; No. of Pins:12; Operating Temperature Min:-40C; Operating Temperature Max:125C; Package / Case:12-DFN ;RoHS Compliant: Yes |
| LTC3245EMSE#PBF | 制造商:Linear Technology 功能描述:Charge Pump STPUP/STPDN 2.5V to 5V/3.3V/5V 250mA 12-Pin MSOP EP 制造商:Linear Technology 功能描述:IC REG MULTI CONFIG .25A 12MSOP 制造商:Linear Technology 功能描述:DC-DC CONV, BUCK/BOOST, FIXED/ADJ, 450KHZ, MSOP-12; Primary Input Voltage:38V; No. of Outputs:1; Output Current:250mA; No. of Pins:12; Operating Temperature Min:-40C; Operating Temperature Max:125C; Package / Case:12-MSOP ;RoHS Compliant: Yes |
| LTC3245EMSE#TRPBF | 制造商:Linear Technology 功能描述:IC REG MULTI CONFIG .25A 12MSOP 制造商:Linear Technology 功能描述:DC-DC CONV, BUCK/BOOST, FIXED/ADJ, 450KHZ, MSOP-12; Primary Input Voltage:38V; No. of Outputs:1; Output Current:250mA; No. of Pins:12; Operating Temperature Min:-40C; Operating Temperature Max:125C; Package / Case:12-MSOP ;RoHS Compliant: Yes |
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