LTC4090/LTC4090-5 - USB Power Manager with 2A High Voltage Bat-Track Buck Regulator
Features
- Seamless Transition Between Power Sources: Li-Ion Battery, USB, and 6V to 38V Supply (60V Max)
- 2A Output High Voltage Buck Regulator with Bat-Track™ Adaptive Output Control (LTC4090)
- Internal 215mΩ Ideal Diode Plus Optional External Ideal Diode Controller Provides Low Loss Power Path When External Supply / USB Not Present
- Load Dependent Charging from USB Input Guarantees Current Compliance
- Full Featured Li-Ion Battery Charger
- 1.5A Maximum Charge Current with Thermal Limiting
- NTC Thermistor Input for Temperature Qualified Charging
- Tiny (3mm × 6mm × 0.75mm) 22-Pin DFN Package
Typical Application
Description
The LTC4090/LTC4090-5 are USB power managers plus high voltage Li-Ion/Polymer battery chargers. The devices control 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 LTC4090/LTC4090-5 also accommodate high voltage power supplies, such as 12V AC/DC wall adapters, FireWire, or automotive power.
The LTC4090 provides a Bat-Track adaptive output that tracks the battery voltage for high efficiency charging from the high voltage input. The LTC4090-5 provides a fixed 5V output from the high voltage input to charge single cell Li-Ion batteries. 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.
| Float Voltage (V) | NTC Hot Threshold | Bat-Track Adaptive HV Output | |
|---|---|---|---|
| LTC4090 | 4.2V | 29% VVNTC | Yes |
| LTC4090-3 | 3.95V | 32.6% VVNTC | Yes |
| LTC4090-5 | 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 |
|---|---|---|---|---|---|
| LTC4090EDJC-5#PBF | 6x3 DFN-22 | DJC | E | 05-08-1714 | Yes |
| LTC4090EDJC-5#TRPBF | 6x3 DFN-22 | DJC | E | 05-08-1714 | Yes |
| LTC4090EDJC#PBF | 6x3 DFN-22 | DJC | E | 05-08-1714 | Yes |
| LTC4090EDJC#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 | |
|---|---|---|---|---|---|---|
| LTC4090EDJC-5#PBF | 6x3 DFN-22 | E | $4.64 | $3.25 | Yes | |
| LTC4090EDJC-5#TRPBF | 6x3 DFN-22 | E | $3.31 | Yes | ||
| LTC4090EDJC#PBF | 6x3 DFN-22 | E | $4.64 | $3.25 | Yes | |
| LTC4090EDJC#TRPBF | 6x3 DFN-22 | E | $3.31 | 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 |
|---|---|---|---|
| DC1210A | LTC4090EDJC Demo Board | Dual Input USB Power Manager 6V to 36VIN, (60V Transients), Li-Ion Charger, Up to 1.5A IOUT | $150.00 | |
| Buy Now | |||
Applications
- HDD-Based Media Players
- Personal Navigation Devices
- Other USB-Based Handheld Products
- Automotive Accessories
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Design Tools
LTspice
LTspice® software is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice
Models for the following parts are available in LTspice:
LTC4090
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.
