The LTC3455 is a high efficiency single-chip USB power management IC that supports three power sources: AC adapter, USB cable and Li-ion battery. It also integrates two high efficiency synchronous buck converters that can provide low voltage power for most USB-powered peripherals.
This document is an application design note for the Linear Technology LTC3455, a highly integrated USB power management IC. The device manages power flow between AC adapters, USB cables, and Li-ion batteries while complying with USB standards in a 4mm x 4mm QFN package.
The LTC3455 utilizes an intermediate bus architecture to generate low voltage rails for peripherals using two high-efficiency synchronous buck converters. It also provides power-on reset signals, a Hot Swap output for memory cards, and an uncommitted gain block suitable as a comparator or LDO controller.
The LTC3455 comes in a 4mm x 4mm QFN package.
It manages power flow between AC adapters, USB cables, and Li-ion batteries, provides power-on reset signals, and includes a Hot Swap output.