MAX769 Datasheet (Maxim) - 2 or 3-Cell / Step-Up/Down / Two-Way Pager System

MAX769, 2 or 3-Cell / Step-Up/Down / Two-Way Pager System

The MAX769 is a complete buck/boost power supply and monitoring system for two-way pagers or other lowpower 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 control

MAX769 Features

* o Regulated Step-Up/Step-Down Operation o 80mA Output from 3 Cells o 85% Efficiency o 13µA Idle Mode™ (coast) Current o Selectable Low-Noise PWM or Low-Current PFM Operation o PWM Operating Frequency Synchronized to Seven Times an External Clock Source o Operates at 270kHz with No External Clock o A