LT1944-1 Dual Micropower Step-Up DC/DC Converter
The LT®1944-1 is a dual micropower step-up DC/DC converter in a 10-pin MSOP package. One converter is designed with a 100mA current limit and a 400ns off-time; the other with a 175mA current limit and a 1.5µs off-time. The 1.5µs off-time converter is ideal for generating an output voltage that is close to the input voltage (i.e. a Li-Ion to 5V converter, or a two-cell to 3.3V converter). With an input voltage range of 1.2V to 15V,the LT1944-1 is ideal for a wide variety of applications. Both converters feature a quiescent current of only 20µA at no load, which further reduces to 0.5µA in shutdown. A current limited, fixed off-time control scheme conserves operating current, resulting in high efficiency over a broad range of load current. Tiny, low profile inductors and capacitors can be used to minimize footprint and cost in space-conscious portable applications
产品特点 Features
- Low Quiescent Current:
20µA in Active Mode
<1µA in Shutdown Mode
- Operates with VIN as Low as 1.2V
- Low VCESAT Switches: 85mV at 70mA
- Uses Small Surface Mount Components
- High Output Voltage: Up to 34V
- Tiny 10-Pin MSOP Package
参数
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应用
- Small TFT LCD Panels
- Handheld Computers
- Battery Backup
- Digital Cameras
典型应用图
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LT1944-1 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) * |
| LT1944-1EMS |
MSOP |
10 |
E |
$2.37 |
$2.00 |
| LT1944-1EMS#PBF |
MSOP |
10 |
E |
$2.37 |
$2.00 |
| LT1944-1EMS#TR |
MSOP |
10 |
E |
|
$2.06 |
| LT1944-1EMS#TRPBF |
MSOP |
10 |
E |
|
$2.06 |
| LT1944EMS |
MSOP |
10 |
E |
$2.37 |
$2.00 |
| LT1944EMS#PBF |
MSOP |
10 |
E |
$2.37 |
$2.00 |
| LT1944EMS#TR |
MSOP |
10 |
E |
|
$2.06 |
| LT1944EMS#TRPBF |
MSOP |
10 |
E |
|
$2.06 |
LT1944-1 数据手册及相关资料下载
- 数据手册(英文) : LT1944-1 - Dual Micropower Step-Up DC/DC Converter.PDF
- 设计要点 (英文) : DN349 - Quad Output Switching Converter Provides Power for Large TFT LCD Panels.PDF
- 可靠性数据 : R365 Reliability Data .PDF
