LTC4065 LTC4065A
PRODUCTIONStandalone 750mA Li-Ion Battery Charger in 2 x 2 DFN
- Part Models
- 4
- 1ku List Price
- Starting From $1.69
Overview
- 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
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
Documentation
Data Sheet 1
User Guide 1
Application Note 1
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 Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| LTC4065AEDC#TRMPBF | 6-Lead DFN (2mm x 2mm w/ EP) | ||
| LTC4065AEDC#TRPBF | 6-Lead DFN (2mm x 2mm w/ EP) | ||
| LTC4065EDC#TRMPBF | 6-Lead DFN (2mm x 2mm w/ EP) | ||
| LTC4065EDC#TRPBF | 6-Lead DFN (2mm x 2mm w/ EP) |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Can't find the software or driver you need?
Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Battery Monitors & Fuel Gauges 1 | ||
| LTC2942 | Obsolete | Battery Gas Gauge with Temperature, Voltage Measurement |
| Hot Swap Controllers 1 | ||
|
LTC4361-1 LTC4361-2 |
Overvoltage/Overcurrent Protection Controller | |
| Temperature Sensors 1 | ||
| LTC2997 | PRODUCTION | Remote/Internal Temperature Sensor |
| Parts | Product Life Cycle | Description |
|---|---|---|
| LTC4065LLTC4065LX LTC4065L-4.1LTC4065LX-4.1 | Standalone 250mA Li-Ion Battery Charger in 2 × 2 DFN |
Tools & Simulations
LTspice
Models for the following parts are available in LTspice:
- LTC4065
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.
Evaluation Kits
LTC4065EDC Demo Board | VIN = 3.75V to 5.25V, 650mA Standalone Li-Ion Linear Battery Charger