LTC1265 1.2A, High Efficiency Step-Down DC/DC Converter
The LTC™1265 is a monolithic step-down current mode DC/DC converter featuring Burst Mode � operation at low output current. The LTC1265 incorporates a 0.3 Ohms switch (VIN =10V) allowing up to 1.2A of output current. Under no load condition, the converter draws only 160µA. In shutdown it typically draws a mere 5µA making this converter ideal for current sensitive applications. In dropout the internal P-channel MOSFET switch is turned on continuously maximizing the life of the battery source. The LTC1265 incorporates automatic power saving Burst Mode operation to reduce gate charge losses when the load currents drop below the level required for continuous operation. The inductor current is user-programmable via an external current sense resistor. Operation up to 700kHz permits the use of small surface mount inductors and capacitors
产品特点 Features
- High Efficiency: Up to 95%
- Current Mode Operation for Excellent Line and Load Transient Response
- Internal 0.3 Ohms Power Switch (VIN = 10V)
- Short-Circuit Protection
- Low Dropout Operation: 100% Duty Cycle
- Low-Battery Detector
- Low 160µA Standby Current at Light Loads
- Active-High Micropower Shutdown: IQ < 15µA
- Peak Inductor Current Independent of Inductor Value
- Available in 14-pin SO Package
参数
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应用
- 5V to 3.3V Conversion
- Distributed Power Systems
- Step-Down Converters
- Inverting Converters
- Memory Backup Supply
- Portable Instruments
- Battery-Powered Equipment
- Cellular Telephones
典型应用图
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LTC1265 订购信息和价格参考Package Variations and Pricing
| 器件型号 |
封装 |
引脚 |
温度 |
价格 (以 1 ~ 99 片为批量) |
价格 (以 1000 片为批量) * |
| LTC1265CS |
SO |
14 |
C |
$4.60 |
$3.75 |
| LTC1265CS#PBF |
SO |
14 |
C |
$4.60 |
$3.75 |
| LTC1265CS#TR |
SO |
14 |
C |
|
$3.81 |
| LTC1265CS#TRPBF |
SO |
14 |
C |
|
$3.81 |
| LTC1265CS-3.3 |
SO |
14 |
C |
$4.60 |
$3.75 |
| LTC1265CS-3.3#PBF |
SO |
14 |
C |
$4.60 |
$3.75 |
| LTC1265CS-3.3#TR |
SO |
14 |
C |
|
$3.81 |
| LTC1265CS-3.3#TRPBF |
SO |
14 |
C |
|
$3.81 |
| LTC1265CS-5 |
SO |
14 |
C |
$4.60 |
$3.75 |
| LTC1265CS-5#PBF |
SO |
14 |
C |
$4.60 |
$3.75 |
| LTC1265CS-5#TR |
SO |
14 |
C |
|
$3.81 |
| LTC1265CS-5#TRPBF |
SO |
14 |
C |
|
$3.81 |
| LTC1265IS |
SO |
14 |
I |
$5.15 |
$4.25 |
| LTC1265IS#PBF |
SO |
14 |
I |
$5.15 |
$4.25 |
| LTC1265IS#TR |
SO |
14 |
I |
|
$4.31 |
| LTC1265IS#TRPBF |
SO |
14 |
I |
|
$4.31 |
LTC1265 数据手册及相关资料下载
- 数据手册(英文) : LTC1265 - 1.2A, High Efficiency Step-Down DC/DC Converter.PDF
- 应用指南 (英文) : AN66 - linear Technology Magazine Circuit Collection, Volume II.PDF
- 设计要点 (英文) : DN73 - A Simple High Efficiency, Step-Down Switching Regulator.PDF
- 设计要点 (英文) : DN74 - Techniques for Deriving 3.3V from 5V Supplies.PDF
- 设计要点 (英文) : DN86 - Ultra-Low Power, High Efficiency DC/DC Converter Operates Outside the Audio Band.PDF
- 设计要点 (英文) : DN91 - 5V to 3.3V Circuit Collection.PDF
- 可靠性数据 : R245 Reliability Data .PDF
