数据手册：MAX769 完备的电源及监控系统，简化设计、降低成本、节省空间 .pdf [英文Rev.1(PDF,176kB)]
{状况：生产中。}
The MAX769 is a complete buck/boost power supply and monitoring system for two-way pagers or other low-power digital communications devices. Few external components are required. Included on-chip are:
An 80mA output, synchronous-rectified, buck/boost DC-DC converter with a digitally controlled +1.8V to +4.9V output. The DC-DC converter is unique, since it provides a regulated output for battery inputs that are both less than and greater than the output voltage, without using transformers.
Three low-noise linear-regulator outputs
Three DAC-controlled comparators for software-driven, 3-channel A/D conversion
SPI™-compatible serial interface
Reset and low-battery (LBO) warning outputs
Charger for NiCd/NiMH, lithium battery, or storage capacitor for RF PA power or system backup
Two 1.8Ω (typical), serial-controlled, open-drain MOSFET switches for beeper or vibrator drive
An evaluation kit for the MAX769 (MAX769EVKIT) is available to aid in design and prototyping.
产品关键特性
- Regulated Step-Up/Step-Down Operation
- 80mA Output from 3 Cells
- 85% Efficiency
- 13µA Idle Mode™ (coast) Current
- Selectable Low-Noise PWM or Low-Current PFM Operation
- PWM Operating Frequency Synchronized to Seven Times an External Clock Source
- Operates at 270kHz with No External Clock
- Automatic Backup-Battery Switchover
| 应用与使用范围
|
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 |
| MAX769EEI | 生产中 | QSOP；28引脚；61.9mm²封装信息 | -40°C至+85°C | RoHS/无铅：否材料分析 |
| MAX769EEI+ | 生产中 | QSOP；28引脚；61.9mm²封装信息 | -40°C至+85°C | RoHS/无铅：无铅材料分析 |
| MAX769EEI+T | 生产中 | QSOP；封装信息 | -40°C至+85°C | 参考数据资料 |
| MAX769EEI-T | 生产中 | QSOP；28引脚封装信息 | -40°C至+85°C | 参考数据资料 |
功能接近器件
评估板与开发套件
相关芯片型号
