The LTC1998IS6 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 LTC1998IS6 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.
A proprietary internal architecture maintains 1% threshold voltage accuracy over temperature with low cost 1% external resistors.
A separate power supply pin, VLOGIC, allows the battery-low logic output to operate below the battery voltage, allowing compatibility with low voltage microprocessors without a pull-up resistor. Power supply glitches are eliminated by preventing the cross-conducting current which occurs when the output changes state.
The LTC1998IS6 operates with battery or supply voltages up to 5.5V and its battery-low output is valid for battery voltages above 1.5V.
Feature
- 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 Profile (1mm) ThinSOT™ Package
Applications
- Lithium-Ion Battery-Powered Equipment
- PDAs
- Cell Phones
- Handheld Instruments
- Battery Packs
- Pagers
- Palm Top Computers
- POS Terminals
(Picture: Pinout)
