General Description

The MAX1259 battery manager provides backup-battery switching for CMOS RAM, microprocessors, or other lowpower logic ICs. It automatically switches to the backup battery when the primary power supply is interrupted. Low-loss switches guarantee an input-to-output differential of only 200mV while supplying 250mA from the primary power supply or 15mA from the battery.

Features

● Switches to Backup Battery if Power Fails

● Consumes Less than 100nA of Battery Current

● Power-Fail Output Signals Primary Power-Supply Loss

● Battery Monitor Indicates Low Battery

● Battery Can Be Disconnected to Prevent Discharge During Shipping

● Battery Automatically Reconnected when VCC is Applied

● Pin-Compatible with the DS1259

● Supply Current Three Times Lower than DS1259

● Available in Extended-Industrial and Military Temperature Ranges

Applications

● Battery Backup for CMOS RAM

● Uninterruptible Power Supplies

● Computers

● Controllers