LTC4067 - USB Power Manager with OVP and Li-Ion/Polymer Charger

Features

    Programmable Input Current Limit:
  • Single Resistor at CLPROG Pin to Set and Monitor Input Current Battery Charger/Ideal Diode/Controller:
  • 13V Overvoltage Protection
  • Full Featured Battery Charger with 4.2V Float
  • Up to 1.25A Programmable Charge Current
  • Thermal Regulation Maximizes Charge Current Without Risk of Overheating
  • Internal 2 Hour Termination Timer from Onset of Voltage Mode Charging
  • Automatic Load Switchover to Battery Power with Internal Ideal Diode and Drive Output for Optional External MOSFET
  • NTC Thermistor Input
  • Bad Battery Time-Out Detection
  • 4mm × 3mm 12-Lead DFN Package

Typical Application

LTC4067 Typical Application
LTC4067 Typical Application

Description

The LTC4067 is a USB power management and Li-Ion/ Polymer battery charger designed for portable battery powered applications. The part controls total current used by the USB peripheral for operation and battery charging. The total input current may be left unregulated, or it may be limited to 20% or 100% of the programmed value up to 1.5A (typically 500mA). Battery charge current is automatically reduced such that the sum of the load current and the charge current does not exceed the programmed input current.

With the addition of an external P-channel MOSFET the LTC4067 can withstand voltages up to 13V.

The LTC4067 includes a complete constant current/constant voltage linear charger for single cell Li-Ion batteries. The float voltage applied to the battery is held to a tight 0.4% tolerance, and charge current is programmed using an external resistor to ground. An end-of-charge status output, CHRG, indicates full charge. Also featured is an NTC thermistor input used to monitor battery temperature while charging.

The LTC4067 is available in a 12-lead low profile 4mm × 3mm DFN 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
LTC4067EDE#PBF 4x3 DFN-12 DE/UE E 05-08-1695 Yes
LTC4067EDE#TRPBF 4x3 DFN-12 DE/UE E 05-08-1695 Yes


LTC4067 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
LTC4067EDE#PBF 4x3 DFN-12 E $2.43 $1.70 Yes
LTC4067EDE#TRPBF 4x3 DFN-12 E $1.76 Yes
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* 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
DC943A LTC4067EDE Demo Board | USB Power Manager with 13V OVP and 1.25A Li-Ion Charger $125.00
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Click here to view our complete list of demo boards

Applications

  • Automatic Battery Charging/Load Switchover
  • Backup Battery Charger
  • Uninterrupted Supplies

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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