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
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 |
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 | ||
| Buy Now • Request Samples | ||||||
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 | |
| Buy Now | |||
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
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- Linduino - Arduino compatible system for developing and distributing firmware libraries and example code
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- And More!
Technical Support
- For immediate technical assistance, contact your local sales office or distributor or call 1-800-4-LINEAR (US customers only) or 408-432-1900.
- For less urgent requests, please complete our Technical Support Request Form. Please allow 2-3 business days for reply.
