LTC4089-3 - USB Power Manager with High Voltage Switching Charger
Features
- Seamless Transition Between Power Sources: Li-Ion Battery, USB, and 6V to 36V External Supply
- High Efficiency 1.2A Charger from 6V to 36V Input with Adaptive Output Control
- 3.95V Float Voltage Improves Battery Lifespan and High Temperature Safety Margin
- Load Dependent Charging from USB Input
- Guarantees Current Compliance 215m Internal Ideal Diode plus Optional External Ideal Diode Controller Provides Low Loss Power Path When External Supply/USB Not Present
- Constant-Current/Constant-Voltage Operation with Thermal Feedback to Maximize Charging Rate without Risk of Overheating
- Selectable 100% or 20% Current Limit (e.g., 500mA/100mA) from USB Input
- Preset 3.95V Charge Voltage with ±0.8% Accuracy
- C/10 Charge Current Detection Output
- NTC Thermistor Input for Temperature Qualified Charging
- Tiny (6mm × 3mm × 0.75mm) 22-Lead DFN Package
Typical Application
Description
The LTC®4089-3 is a USB power manager plus high voltage Li-Ion battery charger. This device controls the total current used by the USB peripheral for operation and battery charging. Battery charge current is automatically reduced such that the sum of the load current and the charge current does not exceed the programmed input current limit. The LTC4089-3 also accommodates high voltage power supplies, such as 12V AC/DC wall adapters, Firewire, or automotive power.
The LTC4089-3 provides an adaptive output that tracks the battery voltage for high efficiency charging from the high voltage input. This 3.95V version of the the standard LTC4089 is intended for applications which have extended battery lifetime requirements or those that require high temperature (approximately >60°C) operation or storage. Under these conditions, a reduced float voltage will trade-off initial cell capacity for the benefit of increased capacity retention over the life of the battery. The charge current is programmable and an end-of-charge status output (CHRG) indicates full charge. Also featured are programmable total charge time, an NTC thermistor input used to monitor battery temperature while charging and automatic recharging of the battery.
| Part Number | Float Voltage | NTC Hot Threshold | Bat-Track HV Output |
|---|---|---|---|
| LTC4089 | 4.2V | 29% Vvntc | Yes |
| LTC4089-1 | 4.1V | 32.6% Vvntc | No |
| LTC4089-3 | 3.95V | 32.6% Vvntc | Yes |
| LTC4089-5 | 4.2V | 29% Vvntc | No |
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 |
|---|---|---|---|---|---|
| LTC4089EDJC-3#PBF | 6x3 DFN-22 | DJC | E | 05-08-1714 | Yes |
| LTC4089EDJC-3#TRPBF | 6x3 DFN-22 | DJC | E | 05-08-1714 | 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 | |
|---|---|---|---|---|---|---|
| LTC4089EDJC-3#PBF | 6x3 DFN-22 | E | $4.21 | $2.95 | Yes | |
| LTC4089EDJC-3#TRPBF | 6x3 DFN-22 | E | $3.01 | 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.Click here to view our complete list of demo boards
Applications
- Portable USB Devices—GPS Receivers, Cameras,MP3 Players, PDAs
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Design Tools
Linear Technology provides a variety of custom design simulation tools and device models to allow even novice designers to quickly and easily evaluate circuits using high performance switching regulators, amplifiers, data converters, filters and more. Please visit our Design Tools page to view and download:
- LTspice - A powerful SPICE simulator, schematic capture and waveform viewer with enhancements and models for easing the simulation of switching regulators
- LTpowerCAD - A complete power supply selection, synthesis and design tool
- LTpowerPlay - A development environment supporting Linear Technology's Digital Power System Management (PSM) products
- PScope & QuikEval - USB-based product demonstration and data acquisition system for use with our ADCs, DACs, and more
- Linduino - Arduino compatible system for developing and distributing firmware libraries and example code
- LinearLab Tools - A collection of Matlab and Python programs that provide direct access to Linear Technology’s data converter evaluation boards
- And More!
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.
