数据手册：MAX1703 紧凑的高效、低噪声升压转换器，带有增益电路 .pdf [英文Rev.2(PDF,288kB)]
{状况：生产中。}
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.
产品关键特性
- 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
| 应用与使用范围
- 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
|
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 |
| MAX1703ESE | 生产中 | SOIC(N)；16引脚；62mm²封装信息 | -40°C至+85°C | RoHS/无铅：否材料分析 |
| MAX1703ESE+ | 生产中 | SOIC(N)；16引脚；62mm²封装信息 | -40°C至+85°C | RoHS/无铅：无铅材料分析 |
| MAX1703ESE+T | 生产中 | SOIC(N)；16引脚；62mm²封装信息 | -40°C至+85°C | RoHS/无铅：无铅材料分析 |
| MAX1703ESE-T | 生产中 | SOIC(N)；16引脚；62mm²封装信息 | -40°C至+85°C | RoHS/无铅：否材料分析 |
功能接近器件
| 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 |
| MAX1706 | 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 |
评估板与开发套件
相关芯片型号
