LTC4080

PRODUCTION

500mA Standalone Li-Ion Charger with Integrated 300mA Synchronous Buck

Data Sheet Product Selection Table

Part Models: 4
1ku List Price: Starting From $2.31

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Overview

Complete Linear Battery Charger with Integrated Buck Converter

Battery Charger:

Constant-Current/Constant-Voltage Operation with Thermal Feedback to Maximize Charge Rate Without Risk of Overheating
Internal 4.5-Hour Safety Timer for Termination
Charge Current Programmable Up to 500mA with 5% Accuracy
C/10 Charge Current Detection Output
5µA Supply Current in Shutdown Mode

Switching Regulator:

High Efﬁciency Synchronous Buck Converter
300mA Output Current
2.7V to 4.5V Input Range (Powered from BAT Pin)
0.8V to V_BAT Output Range
MODE Pin Selects Fixed (2.25MHz) Constant-Frequency PWM Mode or Low I_CC (23µA) Burst Mode^® Operation
2µA BAT Current in Shutdown Mode

The LTC4080 is a complete constant-current/constant-voltage linear battery charger for a single-cell 4.2V lithium-ion battery with an integrated 300mA synchronous buck converter. The small packages and low external component count make the LTC4080 especially suitable for portable applications. Furthermore, LTC4080 is specifically designed to work within USB power specifications.

The CHRG pin indicates when charge current has dropped to ten percent of its programmed value (C/10). An internal 4.5-hour timer terminates the charge cycle. The full-featured LTC4080 battery charger also includes trickle charge, automatic recharge and soft-start (to limit inrush current)

The LTC4080 integrates a synchronous buck converter that is powered from the BAT pin. It has an adjustable output voltage and can deliver up to 300mA of load current. The buck converter also features low current high-efficiency Burst Mode operation that can be selected by the MODE pin.

The LTC4080 is available in 10-lead, low proﬁle (0.75 mm) 3mm × 3mm DFN and MSOP Exposed Pad packages.


	Trickle Charge	Package
LTC4080	Yes	DFN-10
LTC4080X	No	DFN-10, MS-10

Applications

Wireless Headsets
Bluetooth Applications
Portable MP3 Players
Multifunction Wristwatches

Part Models: 4
1ku List Price: Starting From $2.31

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
LTC4080EDD#PBF	10-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4080EDD#TRPBF	10-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4080EMSE#PBF	10-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4080EMSE#TRPBF	10-Lead MSOP w/ EP	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
LTC4080EMSE#PBF	PRODUCTION
LTC4080EMSE#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
LTC4080EMSE#PBF	PRODUCTION
LTC4080EMSE#TRPBF	PRODUCTION