MAX1765：800mA、低噪声、升压型DC-DC转换器，带有500mA线性稳压器
高效boost转换器，集成LDO，用于电池供电设备
The MAX1765 is a high-efficiency, low-noise, step-up DC-DC converter intended for use in battery-powered wireless applications. This device operates at a high 1MHz fixed frequency while maintaining an exceptionally low quiescent supply current (200µA). Its small external components and tiny package make this device an excellent choice for small hand-held applications that require the longest possible battery life. The MAX1765 uses a synchronous-rectified pulse-width-modulation (PWM) boost topology to generate 2.5V to 5.5V outputs from a wide range of input sources, such as one to three alkaline or NiCd/NiMH cells or a single lithium-ion (Li+) cell. Maxim's proprietary architecture significantly improves efficiency at low load currents while automatically transitioning to fixed-frequency PWM operation at medium to high load currents to maintain excellent full-load efficiency. Forced-PWM mode is available for applications that require constant-frequency operation at all load currents, and the MAX1765 may also be synchronized to an external clock to protect sensitive frequency bands in communications equipment. The MAX1765's low-dropout (LDO) linear regulator and DC-DC converter have separate shutdown control. The linear regulator's 250mΩ pass device maintains excellent dropout voltage at currents up to 500mA. The MAX1765 also features analog soft-start and current-limit functions to permit optimization of efficiency, external component size, and output voltage ripple. The MAX1765 comes in a 16-pin QSOP package and a thermally enhanced 16-pin TSSOP-EP.
关键特性
| MAX1765：典型工作电路 应用
|
数据手册DataSheet
| 语言 | 下载文件 | 备注 |
|---|---|---|
| 英文 | MAX1765.pdf | Rev 1; 05/2011 |
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) | Shutdown Mode Supply Current (µA) | DC-DC Outputs | Oper. Freq. (kHz) | Package/Pins | Budgetary Price |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| min | max | min | max | max | typ | typ | max | See Notes | ||||||||
| MAX1765 | 1 | 5.5 | 1.25 | 5 |
| 0.8 |
| Internal | Yes | 0.1 | 1 | 10 | 1 | 1000 |
| $2.88 @1k |
| Part Number | VIN (V) | VIN (V) | VOUT1 (V) | VOUT1 (V) | Preset VOUT (V) | IOUT1 (A) | Output Adjust. Method | Switch Type | Synchronous Switching | DC-DC Outputs | Alternate Topology | Oper. Freq. (kHz) | Package/Pins | Budgetary Price |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| min | max | min | max | max | See Notes | |||||||||
| MAX1765 | 1 | 5.5 | 1.25 | 5 |
| 0.8 |
| Internal | Yes | 1 |
| 1000 |
| $2.88 @1k |
开发工具
质量和环境数据
相关产品
- MAX1703：1节至3节电池、大功率(1.5A)、低噪声、升压型DC-DC转换器
- MAX1700：1节至3节电池、大功率(1A)、低噪声、升压型DC-DC转换器
- MAX1701：1节至3节电池、大功率(1A)、低噪声、升压型DC-DC转换器
- MAX1705：1至3节电池、大电流、低噪声、升压型DC-DC转换器，带有线性稳压器
订购型号
| 型号 | 状况 | 推荐替代产品 | 封装 | 温度 | RoHS/无铅 |
|---|---|---|---|---|---|
| MAX1765EEE | 停止供货 | QSOP,；16引脚；30.9mm² | -40°C至+85°C | RoHS/无铅：否 | |
| MAX1765EEE+ | 生产中 | QSOP,；16引脚；30.9mm² | -40°C至+85°C | RoHS/无铅：无铅 | |
| MAX1765EEE+T | 生产中 | QSOP,；16引脚；30.9mm² | -40°C至+85°C | RoHS/无铅：无铅 | |
| MAX1765EEE-T | 停止供货 | MAX1765EEE+T | QSOP；16引脚 | -40°C至+85°C | 参考数据资料 |
| MAX1765EUE | 停止供货 | MAX1765EUE+ | TSSOP-EP,；16引脚；33.2mm² | -40°C至+85°C | RoHS/无铅：否 |
| MAX1765EUE+ | 生产中 | TSSOP-EP,；16引脚；33.2mm² | -40°C至+85°C | RoHS/无铅：无铅 | |
| MAX1765EUE+T | 生产中 | TSSOP-EP,；16引脚；33.2mm² | -40°C至+85°C | RoHS/无铅：无铅 | |
| MAX1765EUE-T | 停止供货 | MAX1765EUE+T | TSSOP；16引脚 | -40°C至+85°C | 参考数据资料 |
- MAX1765.pdf MAX1765
- MAX1765.pdf MAX1765
- MAX1765.pdf MAX1765
- MAX1765.pdf MAX1765
- 典型工作电路 MAX1765
