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.
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