LTC4015 - Multichemistry Buck Battery Charger Controller with Digital Telemetry System

Features

  • Multichemistry Li-Ion/Polymer, LiFePO4, or Lead- Acid Battery Charger with Termination
  • High Efficiency Synchronous Buck Battery Charger
  • Digital Telemetry System Monitors VBAT, IBAT, RBAT,NTC Ratio (Battery Temperature), VIN, IIN, VSYSTEM, Die Temperature
  • Coulomb Counter and Integrated 14-Bit ADC
  • Wide Charging Input Voltage Range: 4.5V to 35V
  • Wide Battery Voltage Range: Up to 35V
  • Input Undervoltage Charge Current Limit Loop
  • Maximum Power Point Tracking
  • Optional I2C Serial Port Control
  • Input Current Limit Prioritizes System Load Output
  • Input and Output Ideal Diodes Provide Low Loss PowerPath™ Operation
  • Instant-On Operation with Discharged Battery
Designed for Automotive and Transportation Applications
AEC-Q100 data available for specific packages


Typical Application

LTC4015 Typical Application
LTC4015 Typical Application

Description

The LTC®4015 is a complete synchronous buck controller/ charger with pin-selectable, chemistry specific charging and termination algorithms.

The LTC4015 can charge Li-Ion/Polymer, LiFePO4, or leadacid batteries. Battery charge voltage is pin selectable and I2C adjustable. Input current limit and charge current can be accurately programmed with sense resistors and can be individually adjusted via the I2C serial port. A digital telemetry system monitors all system power parameters.

Safety timer and current termination algorithms are supported for lithium chemistry batteries. The LTC4015 also includes automatic recharge, precharge (Li-Ion) and NTC thermistor protection. The LTC4015's I2C port allows user customization of charger algorithms, reading of charger status information, configuration of the maskable and programmable alerts, plus use and configuration of the Coulomb counter.

Available in a 38-Lead 5mm × 7mm QFN package.

Packaging

CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

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

Part Number Package Code Temp Package
Drawing
RoHS
LTC4015EUHF#PBF 5x7 QFN-38 UHF E 05-08-1701 Yes
LTC4015EUHF#TRPBF 5x7 QFN-38 UHF E 05-08-1701 Yes
LTC4015IUHF#PBF 5x7 QFN-38 UHF I 05-08-1701 Yes
LTC4015IUHF#TRPBF 5x7 QFN-38 UHF I 05-08-1701 Yes


LTC4015 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
(1-99)
Price
(1k)*
RoHS
LTC4015EUHF#PBF 5x7 QFN-38 E $8.50 $5.95 Yes
LTC4015EUHF#TRPBF 5x7 QFN-38 E $6.01 Yes
LTC4015IUHF#PBF 5x7 QFN-38 I $9.71 $6.80 Yes
LTC4015IUHF#TRPBF 5x7 QFN-38 I $6.86 Yes
Buy NowRequest Samples
* 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
DC2039A LTC4015EUHF Demo Board | Multichemistry Buck Battery Charger with Digital Telemetry System $200.00
Buy Now
Click here to view our complete list of demo boards

Designed for Automotive and Transportation Applications

AEC-Q100 data is available for these specific part numbers. Please contact your local sales representative for more information regarding reliability reports or to inquire about parts that are not included. For more information, view our Automotive and Transportation page

Part Number Package Temp Price
(1-99)
Price
(1k)*
RoHS
LTC4015IUHF#PBF 5x7 QFN-38 I $9.71 $6.80 Yes
LTC4015IUHF#TRPBF 5x7 QFN-38 I $6.86 Yes
Buy NowRequest Samples
* 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.

Applications

  • Portable Medical Instruments/Military Equipment
  • Industrial Handhelds/Lighting
  • Ruggedized Notebook/Tablet Computers
  • Solar Battery Chargers

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Design Tools

Linear Technology provides a variety of custom design simulation tools and device models to allow even novice designers to quickly and easily evaluate circuits using high performance switching regulators, amplifiers, data converters, filters and more. Please visit our Design Tools page to view and download:

  • LTspice - A powerful SPICE simulator, schematic capture and waveform viewer with enhancements and models for easing the simulation of switching regulators
  • LTpowerCAD - A complete power supply selection, synthesis and design tool
  • LTpowerPlay - A development environment supporting Linear Technology's Digital Power System Management (PSM) products
  • PScope & QuikEval - USB-based product demonstration and data acquisition system for use with our ADCs, DACs, and more
  • Linduino - Arduino compatible system for developing and distributing firmware libraries and example code
  • LinearLab Tools - A collection of Matlab and Python programs that provide direct access to Linear Technology’s data converter evaluation boards
  • And More!

Technical Support