The LTC3455 is a high-efficiency DC/DC converter that can be used in portable devices. It features 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 complete power management solution designed for portable applications such as handheld computers, digital cameras, and MP3 players. It integrates two high-efficiency synchronous step-down DC/DC converters, a USB power manager, a full-featured Li-Ion battery charger, and a Hot Swap output for SDIO and memory cards.
The device manages power from three sources: a single-cell Li-Ion battery, a USB port, and a 5V wall adapter. It features accurate USB current limiting (500mA/100mA), thermal regulation to maximize charging rates without overheating, and the ability to discharge all outputs to ground during shutdown.
| Switching Frequency | 1.2 MHz to 1.8 MHz |
|---|---|
| Package Type | 24-Pin Exposed-Pad QFN |
| PMOS Switch On-Resistance (Vmax) | 0.15 Ohm |
The device provides a solution for obtaining power from three different power sources: a single-cell Li-Ion battery, a USB port, and a wall adapter.
The device is available in a 4mm x 4mm x 0.8mm 24-Pin Dual DC/DC Converter with USB Power Manager and Li-Ion Battery Charger.