This datasheet details the LTC3554 family of micropower, highly integrated power management and battery charger ICs for single-cell Li-Ion/Polymer applications.
The LTC3554 family are micropower, highly integrated power management and battery charger ICs designed specifically for USB applications. They feature a PowerPath manager with automatic load prioritization, an ideal diode, and two synchronous step-down switching regulators.
Key features include seamless transition between input power sources (Li-Ion/Polymer battery and USB), programmable charge current with thermal limiting, and instant-on operation with discharged batteries. The device is available in a 3mm × 3mm × 0.75mm 20-lead QFN package.
| Standby Mode Quiescent Current (All Outputs On) | 10μA |
|---|---|
| Input Current Limit (Maximum) | 500mA |
| Operating Junction Temperature Range | -40°C to 85°C |
| Package Type | 20-Lead (3mm × 3mm) Plastic QFN |
| Ideal Diode On-Resistance | 240mΩ |
The device automatically limits input current to a maximum of either 100mA or 500mA.
The quiescent current drawn from the battery with all supplies enabled in standby mode is only 10μA.
The reset time is 5 seconds for the LTC3554/LTC3554-1 and 14 seconds for the LTC3554-2/LTC3554-3.