DESCRIPTION
The LTC®1998 is a micropower comparator and a precision adjustable reference in a 6-pin SOT-23 package that is optimized for lithium-ion low battery detection circuits.
The LTC1998 features a voltage detection circuit with an adjustable threshold voltage and hysteresis. The threshold voltage can be programmed from 2.5V to 3.25V with two external resistors. A 10mV to 750mV hysteresis can be added with a third external resistor.

FEATURES
■ High Accuracy Trip Voltage: 1% Max Error Using External 1% Resistors
■ Adjustable Threshold Voltage and Hysteresis
■ Quiescent Current: 2.5μA Typ
■ Output Swings Rail-to-Rail
■ Thresholds Programmable from 2.5V to 3.25V
■ Output State Guaranteed for VBATT ≥1.5V
■ Low Profi le (1mm) ThinSOT™ Package

APPLICATIONS
■ Lithium-Ion Battery-Powered Equipment
    PDAs
    Cell Phones
    Handheld Instruments
    Battery Packs
    Pagers
    Palm Top Computers
    POS Terminals