MAX1795：低电源电流、升压型DC-DC转换器，可真正关断
低电源电流、升压型DC-DC转换器，具有True Shutdown™
The MAX1795/MAX1796/MAX1797 are high-efficiency, step-up DC-DC converters intended for small portable hand-held devices. These devices feature Maxim's True Shutdown™ circuitry, which fully disconnects the output from the input in shutdown, improves efficiency, and eliminates costly external components. All three devices also feature Maxim's proprietary LX-damping circuitry for reduced EMI in noise-sensitive applications. For additional in-system flexibility, a battery monitoring comparator (LBI/LBO) remains active even when the DC-DC converter is in shutdown. The input voltage range is +0.7V to VOUT, where VOUT can be set from +2V to +5.5V. Startup is guaranteed from +0.85V. The MAX1795/MAX1796/MAX1797 have a preset, pin-selectable 5V or 3.3V output. The output can also be adjusted to other voltages, using two external resistors. The three devices differ only in their current limits, allowing optimization of external components for different loads: the MAX1795, MAX1796, and MAX1797 have current limits of 0.25A, 0.5A, and 1A, respectively. All devices are packaged in a compact, 8-pin µMAX® package that is only 1.09mm tall and half the size of an 8-pin SO.
关键特性
| MAX1795、MAX1796、MAX1797：典型工作电路 应用
|
数据手册DataSheet
| 语言 | 下载文件 | 备注 |
|---|---|---|
| 英文 | MAX1795-MAX1797.pdf | Rev 0; 12/2000 |
关键参数
| Part Number | VIN (V) | VIN (V) | VOUT1 (V) | VOUT1 (V) | Preset VOUT (V) | IOUT1 (A) | Output Adjust. Method | Switch Type | Synchronous Switching | ICC (mA) | Shutdown Mode Supply Current (µA) | DC-DC Outputs | Package/Pins | Budgetary Price |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| min | max | min | max | max | typ | typ | See Notes | |||||||
| MAX1795 | 0.7 | 5.5 | 2 | 5.5 |
| 0.18 |
| Internal | Yes | 0.025 | 2 | 1 | µMAX/8 | $3.83 @1k |
| MAX1796 | 1 | 0.3 | µMAX/8 | $4.01 @1k | ||||||||||
| MAX1797 | 1 | 0.55 | µMAX/8 | $2.18 @1k | ||||||||||
开发工具
技术资料
- Introduction to Spirometers and Important Design Considerations for Selecting Electrical Components
- Boost Converter Switches Between Battery and USB Power
质量和环境数据
相关产品
- MAX857：3.3V/5V或可调输出、升压型DC-DC转换器
- MAX858：3.3V/5V或可调输出、升压型DC-DC转换器
- MAX856：3.3V/5V或可调输出、升压型DC-DC转换器
- MAX859：3.3V/5V或可调输出、升压型DC-DC转换器
- MAX866：3.3V/5V或可调输出、单节电池DC-DC转换器
- MAX867：3.3V/5V或可调输出、单节电池DC-DC转换器
- MAX1676：高效率、低电源电流、紧凑的、升压型DC-DC转换器
- MAX1674：高效率、低电源电流、紧凑的、升压型DC-DC转换器
- MAX1675：高效率、低电源电流、紧凑的、升压型DC-DC转换器
订购型号
| 型号 | 状况 | 推荐替代产品 | 封装 | 温度 | RoHS/无铅 |
|---|---|---|---|---|---|
| MAX1795EUA | 停止供货 | MAX1795EUA+ | µMAX,；8引脚；15.6mm² | -40°C至+85°C | RoHS/无铅：否 |
| MAX1795EUA+ | 生产中 | µMAX,；8引脚；15.6mm² | -40°C至+85°C | RoHS/无铅：无铅 | |
| MAX1795EUA+T | 生产中 | µMAX,；8引脚；15.6mm² | -40°C至+85°C | RoHS/无铅：无铅 | |
| MAX1795EUA-T | 停止供货 | MAX1795EUA+T | µMAX,；8引脚；15.6mm² | -40°C至+85°C | RoHS/无铅：否 |
- MAX1795-MAX1797.pdf MAX1797
