The LTC3455 is a complete power management solution for a variety of portable applications. The device contains two synchronous step-down DC/DC converters, a USB power controller, a full-featured Li-Ion battery charger, a Hot Swap output, a low-battery indicator, and numerous internal protection features.
The LTC3455 is a power‑management IC that combines two synchronous step‑down converters, a USB power controller, a Li‑ion battery charger, hot‑swap output, and low‑battery detection. It can draw power from a single‑cell Li‑ion battery, a USB port, or a 5 V wall adapter, automatically selecting the best source.
The device is supplied in a 24‑lead 4 mm × 4 mm plastic QFN package with an exposed‑pad ground. Detailed pin functions, electrical characteristics, and typical performance graphs are provided, along with a typical application circuit that shows how to use the LTC3455 with external components such as inductors, capacitors, and supporting DC/DC converters.
| Package type | 24‑Lead (4 mm × 4 mm) Plastic QFN |
|---|---|
| DC/DC converter efficiency | Up to 96 % |
It can be powered from a single‑cell Li‑ion battery, a USB port, or a 5 V wall adapter.
The device is offered in a 24‑lead plastic QFN package measuring 4 mm × 4 mm with an exposed‑pad ground.