LTC4079

RECOMMENDED FOR NEW DESIGNS

60V, 250mA Linear Charger with Low Quiescent Current

Data Sheet (Rev. A) Product Selection Table

Part Models: 8
1ku List Price: Starting From $2.84

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Overview

Wide Input Voltage Range: 2.7V to 60V
Adjustable Battery Voltage: 1.2V to 60V
Adjustable Charge Current: 10mA to 250mA
Low Quiescent Current While Charging: I_IN = 4μA
Ultralow Battery Drain When Shutdown or Charged:
- I_BAT < 0.01μA
Auto Recharge
Input Voltage Regulation for High Impedance Sources

Thermal Regulation Maximizes Output Current without Overheating
Constant Voltage Feedback with ±0.5% Accuracy
NTC Thermistor Input for Temperature Qualified Charging
Adjustable Safety Timer
Charging Status Indication
Thermally Enhanced 10-Lead (3mm × 3mm) DFN Package
AEC-Q100 Qualified for Automotive Applications

The LTC4079 is a low quiescent current, high voltage linear charger for most battery chemistry types including Li-Ion/Polymer, LiFePO₄, Lead-Acid or NiMH battery stacks up to 60V. The maximum charge current is adjustable from 10mA to 250mA with an external resistor. The battery charge voltage is set using an external resistor divider.

With an integrated power device, current sensing and reverse current protection, a complete charging solution using the LTC4079 requires very few external components. Thermal regulation ensures maximum charge current up to the specified limit without the risk of overheating. Charging can be terminated by either C/10 or adjustable timer.

Input voltage regulation reduces charge current when the input voltage falls to an adjustable level or the battery voltage, making it well suited for energy harvesting applications. Other features include temperature qualified charging, bad battery detection, automatic recharge with sampled feedback in standby for negligible battery drain, and an open-drain CHRG status output. The device is offered in a compact, thermally enhanced 10-lead (3mm × 3mm) DFN package.

APPLICATIONS

Embedded Automotive and Industrial
Backup Battery Charging from Another Battery
Energy Harvesting Charger
Thin Film Battery Products

Part Models: 8
1ku List Price: Starting From $2.84

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
LTC4079EDD#PBF	10-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4079EDD#TRPBF	10-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4079EDD#WPBF	10-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4079EDD#WTRPBF	10-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4079IDD#PBF	10-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4079IDD#TRPBF	10-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4079IDD#WPBF	10-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4079IDD#WTRPBF	10-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Feb 14, 2025 - 25_0017 Bond Wire Change from Gold to Copper
		PCN25_0017_Form Material_Report Qualification Results Summary
LTC4079EDD#PBF	PRODUCTION
LTC4079EDD#TRPBF	PRODUCTION
LTC4079IDD#PBF	PRODUCTION
LTC4079IDD#TRPBF	PRODUCTION
Apr 17, 2025 - 25_0043 Change of Gold to Copper Wire and BOM (Automotive)
		PCN25_0043_Form Material_Report Delta Qualification Matrix Qualification Results Summary
LTC4079EDD#WPBF	PRODUCTION
LTC4079EDD#WTRPBF	PRODUCTION
LTC4079IDD#WPBF	PRODUCTION
LTC4079IDD#WTRPBF	PRODUCTION
Apr 14, 2025 - 25_0017 Bond Wire Change from Gold to Copper
		PCN25_0017_Form Material_Report Qualification Results Summary
LTC4079EDD#WPBF	PRODUCTION
LTC4079EDD#WTRPBF	PRODUCTION
LTC4079IDD#WPBF	PRODUCTION
LTC4079IDD#WTRPBF	PRODUCTION

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

Software Resources

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Hardware Ecosystem

Parts	Product Life Cycle	Description
Protection Switches & Controllers 2
LTC4417	RECOMMENDED FOR NEW DESIGNS	Prioritized PowerPath^™ Controller
LTC4231	RECOMMENDED FOR NEW DESIGNS	Micropower Hot Swap Controller

Tools & Simulations

LTspice 1

LTC4079 Demo Circuit - High Vin, Backup 2-Cell Li-Ion Battery Charger (9-60V to 8.4V @ 250mA)

Models for the following parts are available in LTspice:

LTC4079

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

Evaluation Kits

LTC4079 Demo Board | 2.7V-60VIN, 250mA Linear Charger with Low Quiescent Current

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Product Details

Demonstration circuit 2133A features a simple battery charger circuit using the LTC4079 high-voltage monolithic linear charger. The DC2133 has an input voltage range from 2.7V to 60V and is capable of supplying up to 250mA charge current. The charge voltage is jumperselectable to 4.2V or 8.4V. Charge current is adjustable via the PROG pin and initially programmed for 99mA. In shutdown or when unpowered, LTC4079 consumes only 10nA from the battery.

Resources

DC2133A - Design Files
10/24/2014

DC2133A - Schematic
10/24/2014

DC2133A - Demo Manual
10/24/2014

Latest Discussions

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LTC4079

Overview

Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

Application Note 1

Design Note 1

Technical Articles 1

Solutions Bulletin & Brochure 1