数据手册：MAX847 完备的电源及监控系统，提供SPI™接口，简化设计、降低成本、节省空间 .pdf [英文Rev.1a(PDF,176kB)]
{状况：生产中。}
The MAX847 is a complete power-supply and monitoring system for two-way pagers or other low-power digital communications devices. It requires few external components. Included on-chip are:
A 1-cell input, 80mA output, synchronous-rectified boost DC-DC regulator with a digitally controlled +1.8V to +4.9V output
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
An evaluation kit for the MAX847 (MAX847EVKIT) is available to aid in design and prototyping.
产品关键特性
- 80mA Output from 1 Cell at 90% Efficiency
- 13µA Idle Mode™ (coast) Current
- Selectable Low-Noise PWM or Low-Current 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 |
| MAX847EEI | 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 |
| MAX847EEI+ | 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 |
| MAX847EEI+T | 生产中 | QSOP；封装信息 | -40°C至+85°C | 参考数据资料 |
| MAX847EEI-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
| MAX769 | 2或3节电池、升/降压型、双向寻呼机系统电源IC |
评估板与开发套件
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