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LTC4065: Standalone 750mA Li-Ion Battery Charger in 2 x 2 DFN Data Sheet11/9/2007PDF219K
Alternative Parts
Overview
Features and Benefits
- Complete Linear Charger in 2mm × 2mm DFN Package
- C/10 Charge Current Detection Output Timer Termination
- Charge Current Programmable up to 750mA with 5% Accuracy
- No External MOSFET, Sense Resistor or Blocking Diode Required
- Preset 4.2V Float Voltage with 0.6% Accuracy
- Constant-Current/Constant-Voltage Operation with
- Thermal Feedback to Maximize Charging Rate Without Risk of Overheating
- ACPR Pin Indicates Presence of Input Supply (LTC4065A Only)
- Charge Current Monitor Output for Gas Gauging
- Automatic Recharge
- Charges Single Cell Li-Ion Batteries Directly from USB Port
- 20µA Supply Current in Shutdown Mode
- Soft-Start Limits Inrush Current
- Tiny 6-Lead (2mm × 2mm) DFN Package
Product Details
The LTC4065 is a complete constant-current/constant-voltage linear charger for single-cell lithium-ion batteries. Its 2mm × 2mm DFN package and low external component count make the LTC4065 especially well-suited for portable applications. Furthermore, LTC4065 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 timer terminates charging according to battery manufacturer specifications.
No external sense resistor or blocking diode is required due to the internal MOSFET architecture. Thermal feedback regulates charge current to limit the die temperature during high power operation or high ambient temperature conditions.
When the input supply (wall adapter or USB supply) is removed, the LTC4065 automatically enters a low current state, dropping battery drain current to less than 1µA. With power applied, LTC4065 can be put into shutdown mode, reducing the supply current to less than 20µA.
The full-featured LTC4065 also includes automatic recharge, low-battery charge conditioning (trickle charging), soft-start (to limit inrush current) and an open-drain status pin to indicate the presence of an adequate input voltage (LTC4065A only).
The LTC4065 is available in a tiny 6-lead, low profile (0.75mm) 2mm × 2mm DFN package.
| Float Voltage (V) | Charge Current Range | Pin 5 Is EN or ACPR? | Trickle Charge? | |
| LTC4065 | 4.2V | 40mA to 750mA | EN | Yes |
| LTC4065A | 4.2V | 40mA to 750mA | ACPR | Yes |
| LTC4065-4.4 | 4.2V | 40mA to 750mA | EN | Yes |
| LTC4065L | 4.2V | 8mA to 250mA | EN | Yes |
| LTC4065LX | 4.2V | 8mA to 250mA | EN | No |
| LTC4065L-4.1 | 4.1V | 8mA to 250mA | EN | Yes |
Applications
- Wireless PDAs
- Cellular Phones
- Portable Electronics
Product Categories
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
Documentation & Resources
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R540 Reliability Data3/26/2018PDF23 K
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DC763A - Demo Manual9/24/2009PDF625K
Tools & Simulations
LTspice
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Models for the following parts are available in LTspice:
LTC4065
Product Recommendations
LTC4065 Companion Parts
Recommended Related Parts
Design Resources
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 Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
|---|---|---|---|---|
| LTC4065AEDC#TRMPBF | Material Declaration | Reliability Data | 6-Lead DFN (2mm x 2mm w/ EP) | |
| LTC4065AEDC#TRPBF | Material Declaration | Reliability Data | 6-Lead DFN (2mm x 2mm w/ EP) | |
| LTC4065EDC#TRMPBF | Material Declaration | Reliability Data | 6-Lead DFN (2mm x 2mm w/ EP) | |
| LTC4065EDC#TRPBF | Material Declaration | Reliability Data | 6-Lead DFN (2mm x 2mm w/ EP) | |
| Wafer Fabrication Data | R540 Reliability Data |
Support & Discussions
LTC4065 Discussions
Sample & Buy
Ordering FAQs
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Buy Now Pricing
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Lead Times
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Sampling
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Evaluation Boards
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Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.
Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.