LTC4001
PRODUCTION2A Synchronous Buck Li-Ion Charger
- Part Models
- 2
- 1ku List Price
- Starting From $3.37
Overview
- Low Power Dissipation
- 2A Maximum Charge Current
- No External MOSFETs, Sense Resistor or Blocking Diode Required
- Remote Sensing at Battery Terminals
- Programmable Charge Termination Timer
- Preset 4.2V Float Voltage with ±0.5% Accuracy
- Programmable Charge Current Detection/Termination
- Automatic Recharge
- Thermistor Input for Temperature Qualified Charging
- Compatible with Current Limited Wall Adapters
- Low Profile 16-Lead (4mm × 4mm) QFN Package
The LTC4001 is a 2A Li-Ion battery charger intended for 5V wall adapters. It utilizes a 1.5MHz synchronous buck converter topology to reduce power dissipation during charging. Low power dissipation, an internal MOSFET and sense resistor allow a physically small charger that can be embedded in a wide range of handheld applications. The LTC4001 includes complete charge termination circuitry, automatic recharge and a ±1% 4.2V float voltage. Input short-circuit protection is included so no blocking diode is required.
Battery charge current, charge timeout and end-of-charge indication parameters are set with external components. Additional features include shorted cell detection, temperature qualified charging and overvoltage protection. The LTC4001 is available in a low profile (0.75mm) 16-lead (4mm × 4mm) QFN package.
| Float Voltage | |
| LTC4001 | 4.2V |
| LTC4001-1 | 4.1V |
Applications
- Handheld Battery-Powered Devices
- Handheld Computers
- Charging Docks and Cradles
- Digital Cameras
- Smart Phones
Documentation
Data Sheet 1
User Guide 1
Application Note 1
Design Note 1
Technical Articles 1
Product Selector Card 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 |
|---|---|---|---|
| LTC4001EUF#PBF | 16-Lead QFN (4mm x 4mm x 0.75mm w/ EP) | ||
| LTC4001EUF#TRPBF | 16-Lead QFN (4mm x 4mm x 0.75mm w/ EP) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Feb 14, 2025 - 25_0016 Bond Wire Change from Gold to Copper Wire (Notification Only) |
||
| LTC4001EUF#PBF | PRODUCTION | |
| LTC4001EUF#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Battery Monitors & Fuel Gauges 1 | ||
| LTC2943 | NOT RECOMMENDED FOR NEW DESIGNS | Multicell Battery Gas Gauge with Temperature, Voltage and Current Measurement |
| Ideal Diodes and PowerPath Controllers 2 | ||
| LTC2953 | RECOMMENDED FOR NEW DESIGNS | Push Button On/Off Controller with Voltage Monitoring |
| LTC4417 | RECOMMENDED FOR NEW DESIGNS | Prioritized PowerPath™ Controller |
| Overvoltage & Overcurrent Protectors 1 | ||
| LTC4365 | RECOMMENDED FOR NEW DESIGNS | Overvoltage, Undervoltage and Reverse Supply Protection Controller |
| Supervisory Circuits & Reset ICs 1 | ||
| LTC2935 | PRODUCTION | Ultra-Low Power Supervisor with Power-Fail Output, Selectable Thresholds |
Evaluation Kits
LTC4001EUF Demo Board