LTC4095 - Standalone USB Li-Ion/Polymer Battery Charger in 2mm x 2mm DFN
Features
- Full-Featured Standalone USB Li-Ion/Polymer Battery Charger
- 100mA to 950mA Programmable Charge Current
- C/10 Charge Current Detection Output
- Internal Safety Timer Termination
- NTC Thermistor Input for Temperature Qualified Charging
- Preset 4.2V Float Voltage with 0.5% Accuracy
- Constant-Current/Constant-Voltage Operation with Thermal Feedback
- Charge Current Monitor Output for Gas Gauging
- Automatic Recharge
- Bad-Battery Detection
- 8.5µA Input Supply Current in Suspend Mode
- Tiny 8-Lead (2mm × 2mm) DFN Package
Typical Application
Description
The LTC4095 is a complete constant-current/constantvoltage linear charger for single-cell lithium-ion/polymer batteries. Its small 2mm x 2mm DFN package and low external component count make the LTC4095 especially well-suited for portable USB power applications.
Up to 950mA of charge current may be programmed via a single resistor from the PROG pin to ground. The HPWR pin allows the charge current to be set at 20% or 100% of its full-scale programmed value. An internal safety timer terminates charge current. The final float voltage is preset to 4.2V and held to a tight 0.5% tolerance. Also featured is an NTC thermistor input to monitor battery temperature while charging, a C/10 current detection output, automatic recharge, bad-battery detection and low-battery trickle charge. A thermal feedback loop regulates the charge current to limit the die temperature during high power operation or high ambient thermal conditions.
The LTC4095 is available in a tiny, low profile (0.75mm) 8-lead 2mm × 2mm 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 |
|---|---|---|---|---|---|
| LTC4095EDC#PBF | 2x2 DFN-8 | DC8 | E | 05-08-1719 | Yes |
| LTC4095EDC#TRMPBF | 2x2 DFN-8 | DC8 | E | 05-08-1719 | Yes |
| LTC4095EDC#TRPBF | 2x2 DFN-8 | DC8 | E | 05-08-1719 | 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 | |
|---|---|---|---|---|---|---|
| LTC4095EDC#PBF | 2x2 DFN-8 | E | $1.64 | Yes | ||
| LTC4095EDC#TRMPBF | 2x2 DFN-8 | E | $1.64 | $1.20 | Yes | |
| LTC4095EDC#TRPBF | 2x2 DFN-8 | E | $1.64 | $1.15 | 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 |
|---|---|---|---|
| DC1094A | LTC4095EDC Demo Board | Contact Factory | |
| Buy Now | |||
Applications
- PDAs
- Media Players
- Cellular Phones
- Other Portable Electronics
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Design Tools
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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.
