LTC1998 - 2.5µA, 1% Accurate SOT-23 Comparator and Voltage Reference for Battery Monitoring
Datasheet Documentation
Datasheet
Reliability Data
LT Journal
cad_symbol
Overview

Features

Typical Application

LTC1998 Typical Application
LTC1998 Typical Application

Description

The LTC1998 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.

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 LTC1998 operates with battery or supply voltages up to 5.5V and its battery-low output is valid for battery voltages above 1.5V.

Packaging

SOT-23

LTC1998 Package Drawing
Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price
(1-99)		 Price
(1k)*
LTC1998CS6#PBF SOT 6 C $1.33
LTC1998CS6#TRMPBF SOT 6 C $1.33 $0.97
LTC1998CS6#TRPBF SOT 6 C $1.33 $0.95
LTC1998IS6#PBF SOT 6 I $1.53
LTC1998IS6#TRMPBF SOT 6 I $1.53 $1.23
LTC1998IS6#TRPBF SOT 6 I $1.53 $1.21
LTC1998CS6 SOT 6 C $2.66
LTC1998CS6#TR SOT 6 C $2.66 $1.90
LTC1998IS6 SOT 6 I $3.06
LTC1998IS6#TR SOT 6 I $3.06 $2.42
LTC1998CS6#TRM SOT 6 C $2.66 $1.94
LTC1998IS6#TRM SOT 6 I $3.06 $2.46
* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.