数据手册：MAX1692 微小的开关控制器，提供600mA驱动，性能指标比LDO提高10倍 .pdf [英文Rev.0(PDF,160kB)]
{状况：生产中。}
The MAX1692 is a low-noise, pulse-width-modulated (PWM), DC-DC step-down
converter. It powers logic and transmitters in small wireless systems such as cellular phones,
communicating PDAs, and handy-terminals. The device features an internal synchronous rectifier for high
efficiency; it requires no external Schottky diode. Excellent noise characteristics and fixed-frequency
operation provide easy post-filtering. The MAX1692 is ideally suited for Li-Ion battery applications. It is
also useful for +3V or +5V fixed input applications.
The device operates in one of four modes. Forced PWM mode operates at a fixed frequency regardless of
the load. Synchronizable PWM mode allows an external switching frequency to control and minimize
harmonics. Idle Mode™ (PWM/PFM) extends battery life by switching to a PFM pulse-skipping mode during
light loads. Shutdown mode places the device in standby, reducing quiescent supply current to under
0.1µA.
The MAX1692 can deliver over 600mA. The output voltage can be adjusted from 1.25V to VIN with the
input range of +2.7V to +5.5V. Other features of the MAX1692 include high efficiency, low dropout voltage,
and a 1.2%-accurate 1.25V reference. It is available in a space-saving 10-pin µMAX package with a
height of only 1.11mm.
产品关键特性
- +2.7V to +5.5V Input Range
- Adjustable Output from 1.25V to VIN
- 600mA Guaranteed Output Current
- 95% Efficiency
- No Schottky Diode Required
- 85µA Quiescent Current
- 100% Duty Cycle in Dropout
- 750kHz Fixed-Frequency PWM Operation
- Synchronizable Switching Frequency
- Accurate Reference: 1.25V (±1.2%)
- Small 10-Pin µMAX Package
| 应用与使用范围
- 电池供电设备(1节Li+或3节NiMH/NiCd)
- 蜂窝电话
- 无绳电话
- CPU I/O电源
- 笔记本电脑芯片组电源
- PDA与手持终端
|
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 |
| MAX1692EUB | 生产中 | µMAX；10引脚；15.4mm²封装信息 | -40°C至+85°C | RoHS/无铅：否材料分析 |
| MAX1692EUB+ | 生产中 | µMAX；10引脚；15.4mm²封装信息 | -40°C至+85°C | RoHS/无铅：无铅材料分析 |
| MAX1692EUB+T | 生产中 | µMAX；10引脚；15.4mm²封装信息 | -40°C至+85°C | RoHS/无铅：无铅材料分析 |
| MAX1692EUB-T | 生产中 | µMAX；10引脚；15.4mm²封装信息 | -40°C至+85°C | RoHS/无铅：否材料分析 |
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