LTC3456是2-Cell, Multi-Output DC/DC Converter with USB Power Manager

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LTC3456 - LTC3456是2-Cell, Multi-Output DC/DC Converter with USB Power Manager

LTC3456是Linear公司的一款PMIC (DC-DC、PowerPath 和电池充电器)产品，LTC3456是2-Cell, Multi-Output DC/DC Converter with USB Power Manager，本站介绍了LTC3456的封装应用图解、特点和优点、功能等，并给出了与LTC3456相关的凌力尔特元器件型号供参考。

LTC3456 - 2-Cell, Multi-Output DC/DC Converter with USB Power Manager

LTC3456 - 2-Cell, Multi-Output DC/DC Converter with USB Power Manager - Linear Technology（凌力尔特）

功能描述

The LTC3456 is a complete power management system IC optimized for a variety of portable applications. The device generates two separate power rails: a 3.3V (fixed) Main supply and a 1.8V (adjustable) Core supply. In addition, the LTC3456 contains a USB power manager, a Hot Swap output, a low-battery indicator and an alwaysalive VMAX output. The LTC3456 takes power from one of three sources: a Wall adapter, a USB port or a 2-cell Alkaline/NiCd/NiMH battery, in that order of priority. Current drawn from the USB port is accurately limited to 100mA or 500mA based on the state of the USBHP pin.

The Main and Core switchers are all high efficiency, 1MHz fixed frequency PWM converters. Availability in a small (4mm × 4mm × 0.75mm) 24-pin QFN package makes the LTC3456 ideal for space-sensitive portable devices.

特点

Seamless Transition Between 2-Cell Battery, USB and AC Wall Adapter Input Power Sources

Main Output: Fixed 3.3V Output

Core Output: Adjustable from 0.8V to VBATT(MIN)

Hot SwapTM Output for Memory Cards

All Outputs Discharged to Ground During Shutdown

Power Supply Sequencing: Main and Hot Swap Outputs Come Up After Core Output

Accurate USB Current Limiting

High Frequency Operation: 1MHz

High Efficiency: Up to 92%

Small (4mm × 4mm × 0.75mm) 24-Pin QFN Package

应用