LTC4009
PRODUCTIONHigh Efficiency, Multi-Chemistry Battery Charger
- Part Models
- 12
- 1ku List Price
- Starting From $4.48
Overview
- General Purpose Battery Charger Controller
- Efficient 550kHz Synchronous Buck PWM Topology
- ±0.5% Output Float Voltage Accuracy
- Programmable Charge Current: 4% Accuracy
- Programmable AC Adapter Current Limit: 3% Accuracy
- No Audible Noise with Ceramic Capacitors
- Wide Input Voltage Range: 6V to 28V
- Wide Output Voltage Range: 2V to 28V
- Indicator Outputs for AC Adapter Present, Charging, C/10 Current Detection and Input Current Limiting
- Analog Charge Current Monitor
- Micropower Shutdown
- Thermally Enhanced 20-Pin 4mm × 4mm × 0.75mm QFN Package
The LTC4009 is a constant-current/constant-voltage battery charger controller. It uses a synchronous quasiconstant frequency PWM control architecture that will not generate audible noise with ceramic bulk capacitors. Charge current is set by the combination of external sense, input and programming resistors. With no built-in termination, the LTC4009 family charges a wide range of batteries under external control.
The LTC4009 features a fully adjustable output voltage, while the LTC4009-1 and LTC4009-2 can be pin-programmed for lithium-ion/polymer battery packs of 1-, 2-, 3- or 4-series cells. The LTC4009-1 provides output voltage of 4.1V/cell, and the LTC4009-2 is a 4.2V/cell version.
The device includes AC adapter input current limiting which maximizes the charge rate for a fixed input power level. An external sense resistor programs the input current limit, and the ICL status pin indicates when the battery charge current is being reduced as a result of AC adapter current limiting.
The CHRG status pin is active during all charging modes, including special indication for low charge current.
Applications
- Notebook Computers
- Portable Instruments
- Battery Backup Systems
Documentation
Data Sheet 1
User Guide 2
Application Note 1
Technical Articles 1
Product Selector Card 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 |
|---|---|---|---|
| LTC4009CUF#PBF | 20-Lead QFN (4mm x 4mm x 0.75mm w/ EP) | ||
| LTC4009CUF#TRPBF | 20-Lead QFN (4mm x 4mm x 0.75mm w/ EP) | ||
| LTC4009CUF-1#PBF | 20-Lead QFN (4mm x 4mm x 0.75mm w/ EP) | ||
| LTC4009CUF-1#TRPBF | 20-Lead QFN (4mm x 4mm x 0.75mm w/ EP) | ||
| LTC4009CUF-2#PBF | 20-Lead QFN (4mm x 4mm x 0.75mm w/ EP) | ||
| LTC4009CUF-2#TRPBF | 20-Lead QFN (4mm x 4mm x 0.75mm w/ EP) | ||
| LTC4009IUF#PBF | 20-Lead QFN (4mm x 4mm x 0.75mm w/ EP) | ||
| LTC4009IUF#TRPBF | 20-Lead QFN (4mm x 4mm x 0.75mm w/ EP) | ||
| LTC4009IUF-1#PBF | 20-Lead QFN (4mm x 4mm x 0.75mm w/ EP) | ||
| LTC4009IUF-1#TRPBF | 20-Lead QFN (4mm x 4mm x 0.75mm w/ EP) | ||
| LTC4009IUF-2#PBF | 20-Lead QFN (4mm x 4mm x 0.75mm w/ EP) | ||
| LTC4009IUF-2#TRPBF | 20-Lead QFN (4mm x 4mm x 0.75mm w/ EP) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Jan 20, 2022 - 21_0269 Addition of Alternate Assembly Site ASE Taiwan for Select LFCSP Products |
||
| LTC4009CUF#PBF | PRODUCTION | |
| LTC4009CUF#TRPBF | PRODUCTION | |
| LTC4009CUF-1#PBF | PRODUCTION | |
| LTC4009CUF-1#TRPBF | PRODUCTION | |
| LTC4009CUF-2#PBF | PRODUCTION | |
| LTC4009CUF-2#TRPBF | PRODUCTION | |
| LTC4009IUF#PBF | PRODUCTION | |
| LTC4009IUF#TRPBF | PRODUCTION | |
| LTC4009IUF-1#PBF | PRODUCTION | |
| LTC4009IUF-1#TRPBF | PRODUCTION | |
| LTC4009IUF-2#PBF | PRODUCTION | |
| LTC4009IUF-2#TRPBF | PRODUCTION | |
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 Charger ICs 1 | ||
| LTM8061 | RECOMMENDED FOR NEW DESIGNS | 32V, 2A μModule (Power Module) Li-Ion/Polymer Battery Charger |
| 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 | ||
| LTC2955 | RECOMMENDED FOR NEW DESIGNS | Pushbutton On/Off Controller with Automatic Turn-On |
| LTC4417 | RECOMMENDED FOR NEW DESIGNS | Prioritized PowerPath™ Controller |
| Overvoltage & Overcurrent Protectors 1 | ||
| LTC4365 | RECOMMENDED FOR NEW DESIGNS | Overvoltage, Undervoltage and Reverse Supply Protection Controller |
Tools & Simulations
LTspice
Models for the following parts are available in LTspice:
- LTC4009
- LTC4009-1
- LTC4009-2
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
LTC4009-2 Multicell Li-Ion Battery Charger Board