LTC1998 - 2.5µA, 1% Accurate SOT-23 Comparator and Voltage Reference for Battery Monitoring

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 > or = 1.5V
  • Low Profile (1mm) ThinSOT™ Package
Designed for Automotive and Transportation Applications
AEC-Q100 data available for specific packages


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

CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
Drawing
RoHS
LTC1998CS6#PBF SOT-23 S6 C 05-08-1636 Yes
LTC1998CS6#TRMPBF SOT-23 S6 C 05-08-1636 Yes
LTC1998CS6#TRPBF SOT-23 S6 C 05-08-1636 Yes
LTC1998IS6#PBF SOT-23 S6 I 05-08-1636 Yes
LTC1998IS6#TRMPBF SOT-23 S6 I 05-08-1636 Yes
LTC1998IS6#TRPBF SOT-23 S6 I 05-08-1636 Yes


LTC1998 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
(1-99)
Price
(1k)*
RoHS
LTC1998CS6#PBF SOT-23 C $1.33 Yes
LTC1998CS6#TRMPBF SOT-23 C $1.33 $0.97 Yes
LTC1998CS6#TRPBF SOT-23 C $1.33 $0.95 Yes
LTC1998IS6#PBF SOT-23 I $1.53 Yes
LTC1998IS6#TRMPBF SOT-23 I $1.53 $1.23 Yes
LTC1998IS6#TRPBF SOT-23 I $1.53 $1.21 Yes
Buy NowRequest Samples
* 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.

Click here to view our complete list of demo boards

Designed for Automotive and Transportation Applications

AEC-Q100 data is available for these specific part numbers. Please contact your local sales representative for more information regarding reliability reports or to inquire about parts that are not included. For more information, view our Automotive and Transportation page

Part Number Package Temp Price
(1-99)
Price
(1k)*
RoHS
LTC1998IS6#PBF SOT-23 I $1.53 Yes
LTC1998IS6#TRMPBF SOT-23 I $1.53 $1.23 Yes
LTC1998IS6#TRPBF SOT-23 I $1.53 $1.21 Yes
Buy NowRequest Samples
* 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.

Applications

  • Lithium-Ion Battery-Powered Equipment
    PDAs
    Cell Phones
    Handheld Instruments
    Battery Packs
    Pagers
    Palm Top Comp

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Design Tools

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