LTC4089-1 - 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
- Load Dependent Charging from USB Input Guarantees Current Compliance
- 215mΩ 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 4.1V Charge Voltage with 0.8% Accuracy
- C/10 Charge Current Detection Output
- NTC Thermistor Input for Temperature Qualified Charging
- Tiny (6mm x 3mm x 0.75mm) 22-Pin DFN Package
Typical Application
Description
The LTC4089-1 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 LTC4089-1 also accommodates high voltage power supplies, such as 12V AC-DC wall adapters, FireWire, or automotive power.
The LTC4089-1 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 is 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
For complete and up to date package information and drawings, please refer to our packaging page
DFN-22
Order Info
- Part numbers ending in PBF are lead free. Please contact LTC marketing for information on lead based finish parts.
- 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 | Pins | Temp | Price (1-99) | Price (1k)* | RoHS Data |
|---|---|---|---|---|---|---|
| LTC4089EDJC | DFN | 22 | E | $4.21 | $2.95 | View |
| LTC4089EDJC#PBF | DFN | 22 | E | $4.21 | $2.95 | View |
| LTC4089EDJC#TR | DFN | 22 | E | $3.01 | View | |
| LTC4089EDJC#TRPBF | DFN | 22 | E | $3.01 | View | |
| LTC4089EDJC-1 | DFN | 22 | E | $4.21 | $2.95 | View |
| LTC4089EDJC-1#PBF | DFN | 22 | E | $4.21 | $2.95 | View |
| LTC4089EDJC-1#TR | DFN | 22 | E | $3.01 | View | |
| LTC4089EDJC-1#TRPBF | DFN | 22 | E | $3.01 | View | |
| LTC4089EDJC-3#PBF | DFN | 22 | E | $4.21 | $2.95 | View |
| LTC4089EDJC-3#TRPBF | DFN | 22 | E | $3.01 | View | |
| LTC4089EDJC-5 | DFN | 22 | E | $4.21 | $2.95 | View |
| LTC4089EDJC-5#PBF | DFN | 22 | E | $4.21 | $3.01 | View |
| LTC4089EDJC-5#TR | DFN | 22 | E | $3.01 | View | |
| LTC4089EDJC-5#TRPBF | DFN | 22 | E | $3.01 | View | |
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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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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.