MAX847 Datasheet - Maxim

MAX847 1-Cell / Step-Up Two-Way Pager System IC

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 .

MAX847 Features

* o 80mA Output from 1 Cell at 90% Efficiency o 13µA Idle Mode™ (coast) Current o Selectable Low-Noise PWM or Low-Current Operation o PWM Operating Frequency Synchronized to Seven Times an External Clock Source o Operates at 270kHz with No External Clock o Automatic Backup-Battery Switchover ________

MAX847_MaximIntegratedProducts.pdf