LTC4150 - Coulomb Counter/Battery Gas Gauge


  • Indicates Charge Quantity and Polarity
  • ±50mV Sense Voltage Range
  • Precision Timer Capacitor or Crystal Not Required
  • 2.7V to 8.5V Operation
  • High Side Sense
  • 32.55Hz/V Charge Count Frequency
  • 1.5μA Shutdown Current
  • 10-Pin MSOP Package

Typical Application

LTC4150 Typical Application
LTC4150 Typical Application


The LTC4150 measures battery depletion and charging in handheld PC and portable product applications. The device monitors current through an external sense resistor between the battery’s positive terminal and the battery’s load or charger. A voltage-to-frequency converter transforms the current sense voltage into a series of output pulses at the interrupt pin. These pulses correspond to a fixed quantity of charge flowing into or out of the battery. The part also indicates charge polarity as the battery is depleted or charged.

The LTC4150 is intended for 1-cell or 2-cell Li-Ion and 3-cell to 6-cell NiCd or NiMH applications.


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

Part Number Package Code Temp Package
LTC4150CMS MS-10 MS C 05-08-1661 RoHS
LTC4150CMS#PBF MS-10 MS C 05-08-1661 RoHS
LTC4150CMS#TR MS-10 MS C 05-08-1661 RoHS
LTC4150CMS#TRPBF MS-10 MS C 05-08-1661 RoHS
LTC4150IMS MS-10 MS I 05-08-1661 RoHS
LTC4150IMS#PBF MS-10 MS I 05-08-1661 RoHS
LTC4150IMS#TR MS-10 MS I 05-08-1661 RoHS
LTC4150IMS#TRPBF MS-10 MS I 05-08-1661 RoHS

LTC4150 Package Drawing

Order Info

Package Variations and Pricing

Part Number Package Temp Price
LTC4150CMS MS-10 C $2.00 $1.50 View
LTC4150CMS#PBF MS-10 C $2.00 $1.50 View
LTC4150CMS#TR MS-10 C $1.56 View
LTC4150CMS#TRPBF MS-10 C $1.56 View
LTC4150IMS MS-10 I $2.45 $1.85 View
LTC4150IMS#PBF MS-10 I $2.45 $1.85 View
LTC4150IMS#TR MS-10 I $1.91 View
LTC4150IMS#TRPBF MS-10 I $1.91 View
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* 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.

Part Number Description Price Documentation
DC756A LTC4150CMS | Coulomb Counter / Battery Gas Gauge (requires DC590 Controller) $50.00
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Companion Boards

Part Number Description Price Documentation
DC590B USB Serial Controller for Linear Technology QuikEval Demo Boards $50.00
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Click here to view our complete list of demo boards


  • Battery Chargers
  • Palmtop Computers and PDAs
  • Cellular Telephones and Wireless Modems

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