数据手册：MAX1775 双输出降压转换器，用于PDA和掌上电脑 .pdf [英文Rev.2(PDF,252kB)]
{状况：生产中。}
The MAX1775 dual, step-down DC-DC converter generates both the main (+3.3V at over 2A) and core (+1.8V at up to 1.5A) supplies for a complete power solution for PDAs, subnotebooks, and other hand-held devices. The main output is adjustable from +1.25V to +5.5V. The core output is adjustable from 1V to 5V. Both switching converters operate at up to 1.25MHz for small external components and use synchronous rectifiers to achieve efficiencies up to 95%. Operation with up to 100% duty cycle provides the lowest possible dropout voltage to extend useful battery life.
The MAX1775 accepts inputs from +2.7V up to +28V, allowing use with many popular battery configurations as well as AC-DC wall adapters. Digital soft-start reduces battery current surges at power-up. Both the main and core converters have separate shutdown inputs. The MAX1775 comes in a small 16-pin QSOP package.
The MAX1775 evaluation kit is available to help reduce design time.
产品关键特性
- Dual, High-Efficiency, Synchronous Rectified Step-Down Converter
- Main Power
- Adjustable from +1.25V to +5.5V
- Over 2A Load Current
- Up to 95% Efficiency
- Core Power
- Adjustable from 1V to 5V
- Internal Switches
- Up to 1.5A Load Current
- Up to 92% Efficiency
- 100% (max) Duty Cycle
- Up to 1.25MHz Switching Frequency
- Input Voltage Range from +2.7V to +28V
- 170µA Quiescent Current
- 5µA Shutdown Current
- Digital Soft-Start
- Independent Shutdown Inputs
| 应用与使用范围
- 手持式计算机
- 网络浏览器
- PDA
- POS终端
- 亚笔记本电脑
|
典型工作电路
芯片订购型号
| 订购型号 | 产品状态 | 封装形式 | 工作温度 | RoHS/无铅 |
| MAX1775EEE | 生产中 | QSOP；16引脚；30.9mm²封装信息 | -40°C至+85°C | RoHS/无铅：否材料分析 |
| MAX1775EEE+ | 生产中 | QSOP；16引脚；30.9mm²封装信息 | -40°C至+85°C | RoHS/无铅：无铅材料分析 |
| MAX1775EEE+T | 生产中 | QSOP；16引脚；30.9mm²封装信息 | -40°C至+85°C | RoHS/无铅：无铅材料分析 |
| MAX1775EEE-T | 生产中 | QSOP；16引脚；30.9mm²封装信息 | -40°C至+85°C | RoHS/无铅：否材料分析 |
功能接近器件
评估板与开发套件
相关芯片型号
