LTC4050

PRODUCTION

Lithium-Ion Linear Battery Charger Controller with Thermistor Interface

Part Models: 4
1ku List Price: Starting From $2.72

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Overview

Complete Standalone Linear Charger Controller for 1-Cell Lithium-Ion Batteries
Thermistor Interface for Battery Temperature Sensing
Preset Charge Voltage with ±1% Accuracy
Programmable Charge Current
C/10 Charge Current Detection Output
Programmable Charge Termination Timer
Input Supply (Wall Adapter) Detection Output
4.5V to 10V Input Voltage Range
Automatic Sleep Mode When Input Supply is Removed (Only 5µA Battery Drain)
Automatic Trickle Charging of Low Voltage Cells
Automatic Battery Recharge
Battery Insertion Detection
Space Saving 10-Pin MSOP Package

The LTC4050-4.1/LTC4050-4.2 are complete standalone constant-current/constant-voltage linear charge controllers for lithium-ion (Li-Ion) batteries. Charge current is programmable and final float voltage has ±1% accuracy.

When the input supply is removed, the LTC4050 automatically enters a low quiescent current sleep mode, dropping the battery drain current to 5µA. An internal comparator detects the near-end-of-charge (C/10) condition while a programmable timer, using an external capacitor, sets the total charge time. Fully discharged cells are automatically trickle charged at 10% of the programmed current until cell voltage exceeds 2.49V. The thermistor interface suspends charging if the cell temperature is outside of a 0°C to 50°C temperature window.

The LTC4050 begins a new charge cycle when a discharged battery is connected to the charger or when the input power is applied. In addition, a new charge cycle is automatically started if the battery remains connected to the charger and the cell voltage drops below 3.88V for 4.1V cells or below 3.98V for 4.2V cells.

The LTC4050 is available in the 10-pin MSOP package.

Applications

Cellular Phones
Handheld Computers
Charging Docks and Cradles

Part Models: 4
1ku List Price: Starting From $2.72

Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
LTC4050EMS-4.1#PBF	10-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4050EMS-4.1#TRPBF	10-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4050EMS-4.2#PBF	10-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4050EMS-4.2#TRPBF	10-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Jun 5, 2024 - 24_0003 Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2)
		PCN24_0003_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LTC4050EMS-4.1#PBF	PRODUCTION
LTC4050EMS-4.1#TRPBF	PRODUCTION
LTC4050EMS-4.2#PBF	PRODUCTION
LTC4050EMS-4.2#TRPBF	PRODUCTION
Feb 4, 2020 - 20_0130 Laser Top Mark Conversion for 10-Lead MSOP Packages Assembled in ADPG and UTAC
		PCN20_0130_Form Material_Report
LTC4050EMS-4.1#PBF	PRODUCTION
LTC4050EMS-4.1#TRPBF	PRODUCTION
LTC4050EMS-4.2#PBF	PRODUCTION
LTC4050EMS-4.2#TRPBF	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Hardware Ecosystem

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