LTC4052-4.2

PRODUCTION

LTC4052-4.2

Lithium-Ion Battery Pulse Charger with Overcurrent Protection

PRODUCTION

Single Cell 4.2V, 1A, Standalone Li-Ion Battery Charger slide

Single Cell 4.2V, 1A, Standalone Li-Ion Battery Charger

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Part Models 2

1ku List Price Starting From $2.48

Features

Very Low Power Dissipation: 350mW at 1A
Complete Standalone Pulse Charger for 1-Cell Lithium-Ion Batteries
Requires No Microcontroller, MOSFET or Blocking Diode
Sense Resistor Limits Maximum Current for Safety
Programmable Charge Termination Timer for
Maximum Capacity Charging
±1% Float Voltage Accuracy
Near End-of-Charge (C/10) Detection Output
AC Wall Adapter Present Output
Low Battery Drain when Input Supply Is Removed
Automatic Trickle Charge for Low Battery
Automatic Battery Refresh
Thermal Shutdown Protection
Tiny Thermally Enhanced MSOP Package

Additional Details

The LTC4052 is a complete standalone pulse charger with integrated MOSFET for 1-cell lithium-ion batteries.

An external sense resistor provides overcurrent limiting as a safety precaution against a user connecting a wall adapter with the incorrect or no current limit. The internal MOSFET prevents reverse battery current from flowing if the input voltage is shorted to ground, eliminating the need for a blocking diode.

As the battery accepts charge and approaches the programmed float voltage, the internal MOSFET begins switching off and on with the duty cycle gradually decreasing as the battery approaches a fully charged condition. A programmable timer terminates the charge cycle. The near end-of-charge C/10 condition is indicated at the CHRG pin when the average charge current falls to one tenth of the wall adapter current. Removing the input voltage puts the LTC4052 into a sleep mode, dropping the battery current drain to less than 1µA.

The LTC4052 is available in a tiny 8-pin thermally enhanced MSOP package.

Applications

Handheld Computers
Cellular Telephones
Cradle Chargers

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Support

Analog Devices Support Portal is a one-stop shop to answer all your ADI questions.

Visit the ADI Support Page

Ask the ADI community for help.

Ask the EngineerZone Community

FAQs

Sales & Ordering FAQs

Part Models 2

1ku List Price Starting From $2.48

Technical Documents 5

LTC4052-4.2: Lithium-Ion Battery Pulse Charger with Overcurrent Protection Data Sheet 08/29/2007

R449 Reliability Data 03/26/2018

DC531A - Demo Manual 09/24/2009

Reverse Voltage Protection for Battery Chargers 06/01/2020

Micropower SOT-23 Buck Regulator Accepts Inputs to 34V 03/01/2003

Design Resources 2

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
LTC4052EMS8E-4.2#PBF	8-Lead MSOP w/ EP	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC4052EMS8E-4.2#TRPBF	8-Lead MSOP w/ EP	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys