LTC4064 - Monolithic Linear Charger for Back-Up Li-Ion Batteries
Features
- Preset 4V Charge Voltage with 1% Accuracy Prolongs 4.2V Li-Ion Battery Lifetime
- Automatic Recharge
- Thermal Regulation Maximizes Charging Rate without Risk of Overheating*
- No MOSFET, Sense Resistor or Blocking Diode Required
- Programmable Charge Termination Timer
- Thermistor Input for Temperature Qualified Charging
- Programmable Charge Current with 7% Accuracy
- C/10 Charge Current Detection Output
- 25µA Supply Current in Shutdown Mode
- Charge Current Monitor Useful for Gas Gauging*
- Charges Directly from USB Port
- Tiny Thermally Enhanced 10-pin MSOP Package
Typical Application
Description
The LTC4064 is a standalone linear charger optimized for prolonging the life of 1-cell Li-ion batteries in battery backup applications. By charging to a float voltage of 4V instead of 4.2V or 4.1V, the LTC4064 decelerates the aging process and capacity degradation when the battery is unused for long periods of time but must be in a ready state.
An external capacitor programs a safety timer to terminate the charge cycle while the charge current is set externally with a single resistor. When the input supply is removed, the LTC4064 automatically enters a low current sleep mode, dropping the battery drain current to less than 3µA.
Additional safety features designed to maximize battery lifetime and reliability include NTC temperature sensing and low battery charge conditioning (trickle charging).
The IC contains an on-chip power MOSFET and eliminates the need for an external sense resistor and blocking diode. The LTC4064 also includes C/10 detection circuitry, AC present logic, and fault detection circuitry.
*US Patent No. 6522118
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 |
|---|---|---|---|---|---|
| LTC4064EMSE#PBF | MS-10E | MSE | E | 05-08-1664 | Yes |
| LTC4064EMSE#TRPBF | MS-10E | MSE | E | 05-08-1664 | 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 | |
|---|---|---|---|---|---|---|
| LTC4064EMSE#PBF | MS-10E | E | $2.59 | $1.85 | Yes | |
| LTC4064EMSE#TRPBF | MS-10E | E | $1.91 | 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 |
|---|---|---|---|
| DC708A | LTC4064EMSE | 4.0V Li-Ion Battery Charger, Vin = 4.25V to 6.3V, Bat = 4.0V @ 0.5A / 1A | $75.00 | |
| Buy Now | |||
Applications
- File Servers, RAID Systems
- Storage Products
- Li-Ion Battery Back-Up
People Who Viewed This Product Also Viewed
- LTC1731-4.X - Single Cell Lithium-Ion Linear Battery Charger Controllers
- LTC4053-4.2 - USB Compatible Lithium-Ion Battery Charger with Thermal Regulation
- LTC4000 - High Voltage High Current Controller for Battery Charging and Power Management
- LTC4054-4.2 - Standalone Linear Li-Ion Battery Charger with Thermal Regulation in ThinSOT
- LTC1733 - Monolithic Linear Lithium-Ion Battery Charger with Thermal Regulation
- LT3652 - Power Tracking 2A Battery Charger for Solar Power
- LT1512 - SEPIC Constant-Current/Constant-Voltage Battery Charger
- LTC4071 - Li-Ion/Polymer Shunt Battery Charger System with Low Battery Disconnect
- LT1513 - SEPIC Constant- or Programmable-Current/Constant-Voltage Battery Charger
- LTC4002 - Standalone Li-Ion Switch Mode Battery Charger
Product Notifications
Please login to your MyLinear account for notifications of datasheet updates, new document releases and LTspice model announcements for your favorite products. If you do not have a MyLinear account you may Sign Up Now.
Forgot your password? Click here.
Need help? Email mylinear@linear.com with questions and comments.
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
- 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.
