MAX1703
1节至3节电池、大功率(1.5A)、低噪声、升压型DC-DC转换器
紧凑的高效、低噪声升压转换器，带有增益电路
数据资料订阅尚在产。
说明
The MAX1703 is a high-efficiency, low-noise, step-up DC-DC converter intended for use in battery-powered wireless applications. It uses a synchronous-rectified pulse-width-modulation (PWM) boost topology to generate a 2.5V to 5.5V output from battery inputs, such as one to three NiCd/NiMH cells or one Li-Ion cell. The device includes a 2A, 75mΩ, N-channel MOSFET switch and a 140mΩ, P-channel synchronous rectifier.
With its internal synchronous rectifier, the MAX1703 delivers up to 5% better efficiency than similar nonsynchronous converters. It also features a pulse-frequency-modulation (PFM) low-power mode to improve efficiency at light loads, and a 1µA shutdown mode.
The MAX1703 comes in a 16-pin narrow SO package and includes an uncommitted comparator that generates a power-good or low-battery-warning output. It also contains a linear gain block that can be used to build a linear regulator.
For lower-power outputs and a smaller package, refer to the MAX1700/MAX1701. For dual outputs (step-up plus linear regulator), refer to the MAX1705/MAX1706. For an on-board analog-to-digital converter, refer to the MAX848/MAX849.
The MAX1703 evaluation kit is available to speed designs.
MAX1703：典型工作电路MAX1703：典型工作电路放大+
关键特性
Up to 95% Efficiency
Up to 1.5A Output
Fixed 5V or Adjustable Step-Up Output (2.5V to 5.5V)
0.7V to 5.5V Input Range
Low-Power Mode (300µW)
Low-Noise, Constant-Frequency Mode (300kHz)
Synchronizable Switching Frequency (200kHz to 400kHz)
1µA Logic-Controlled Shutdown
Power-Good Comparator
Uncommitted Gain Block
应用
数字无绳电话
手持式仪表(PDA、掌上电脑)
掌上电脑
PCS电话
个人通信装置
双向寻呼
无线手机
相关资料
相关产品
封装信息
技术文档
参考设计