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