LTC4079
RECOMMENDED FOR NEW DESIGNS60V, 250mA Linear Charger with Low Quiescent Current
- Part Models
- 8
- 1ku List Price
- Starting From $3.60
Overview
- Wide Input Voltage Range: 2.7V to 60V
- Adjustable Battery Voltage: 1.2V to 60V
- Adjustable Charge Current: 10mA to 250mA
- Low Quiescent Current While Charging: IIN = 4μA
- Ultralow Battery Drain When Shutdown or Charged:
- IBAT < 0.01μA
- Auto Recharge
- Input Voltage Regulation for High Impedance Sources
- Thermal Regulation Maximizes Output Current without Overheating
- Constant Voltage Feedback with ±0.5% Accuracy
- NTC Thermistor Input for Temperature Qualified Charging
- Adjustable Safety Timer
- Charging Status Indication
- Thermally Enhanced 10-Lead (3mm × 3mm) DFN Package
- AEC-Q100 Qualified for Automotive Applications
The LTC4079 is a low quiescent current, high voltage linear charger for most battery chemistry types including Li-Ion/Polymer, LiFePO4, Lead-Acid or NiMH battery stacks up to 60V. The maximum charge current is adjustable from 10mA to 250mA with an external resistor. The battery charge voltage is set using an external resistor divider.
With an integrated power device, current sensing and reverse current protection, a complete charging solution using the LTC4079 requires very few external components. Thermal regulation ensures maximum charge current up to the specified limit without the risk of overheating. Charging can be terminated by either C/10 or adjustable timer.
Input voltage regulation reduces charge current when the input voltage falls to an adjustable level or the battery voltage, making it well suited for energy harvesting applications. Other features include temperature qualified charging, bad battery detection, automatic recharge with sampled feedback in standby for negligible battery drain, and an open-drain CHRG status output. The device is offered in a compact, thermally enhanced 10-lead (3mm × 3mm) DFN package.
APPLICATIONS
- Embedded Automotive and Industrial
- Backup Battery Charging from Another Battery
- Energy Harvesting Charger
- Thin Film Battery Products
Documentation
Data Sheet 1
User Guide 1
Application Note 1
Design Note 1
Technical Articles 1
Brochure 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 |
|---|---|---|---|
| LTC4079EDD#PBF | 10-Lead DFN (3mm x 3mm w/ EP) | ||
| LTC4079EDD#TRPBF | 10-Lead DFN (3mm x 3mm w/ EP) | ||
| LTC4079EDD#WPBF | 10-Lead DFN (3mm x 3mm w/ EP) | ||
| LTC4079EDD#WTRPBF | 10-Lead DFN (3mm x 3mm w/ EP) | ||
| LTC4079IDD#PBF | 10-Lead DFN (3mm x 3mm w/ EP) | ||
| LTC4079IDD#TRPBF | 10-Lead DFN (3mm x 3mm w/ EP) | ||
| LTC4079IDD#WPBF | 10-Lead DFN (3mm x 3mm w/ EP) | ||
| LTC4079IDD#WTRPBF | 10-Lead DFN (3mm x 3mm w/ EP) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Feb 14, 2025 - 25_0017 Bond Wire Change from Gold to Copper |
||
| LTC4079EDD#PBF | PRODUCTION | |
| LTC4079EDD#TRPBF | PRODUCTION | |
| LTC4079IDD#PBF | PRODUCTION | |
| LTC4079IDD#TRPBF | PRODUCTION | |
|
Apr 17, 2025 - 25_0043 Change of Gold to Copper Wire and BOM (Automotive) |
||
| LTC4079EDD#WPBF | PRODUCTION | |
| LTC4079EDD#WTRPBF | PRODUCTION | |
| LTC4079IDD#WPBF | PRODUCTION | |
| LTC4079IDD#WTRPBF | PRODUCTION | |
|
Apr 14, 2025 - 25_0017 Bond Wire Change from Gold to Copper |
||
| LTC4079EDD#WPBF | PRODUCTION | |
| LTC4079EDD#WTRPBF | PRODUCTION | |
| LTC4079IDD#WPBF | PRODUCTION | |
| LTC4079IDD#WTRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Tools & Simulations
LTspice 1
Models for the following parts are available in LTspice:
- LTC4079
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
LTC4079 Demo Board | 2.7V-60VIN, 250mA Linear Charger with Low Quiescent Current