本文介紹了LTCR3589主要特性，方框圖以及典型應(yīng)用電路。Linear 公司的LTCR3589是帶時(shí)序和I2C的八輸出電源穩(wěn)壓器，是ARM和基于ARM處理器以及手提微處理器系統(tǒng)的完整的電源管理解決方案。LTCR3589包括用于核，存儲(chǔ)器和SoC的三個(gè)同步降壓DC/DC轉(zhuǎn)換器，用于I/O的同步降壓-升壓穩(wěn)壓器，以及三個(gè)用于低噪音模擬電源的250mA LDO穩(wěn)壓器。

LTCR3589主要特性：

Triple I2C Adjustable High Efficiency Step-Down DC/DC Converters: 1.6A, 1A, 1A

High Efficiency 1.2A Buck-Boost DC/DC Converter

Triple 250mA LDO Regulators

Pushbutton ON/OFF Control with System Reset

Flexible Pin-Strap Sequencing Operation

I2C and Independent Enable Control Pins

Power Good and Reset Outputs

Dynamic Voltage Scaling and Slew Rate Control

Selectable 2.25MHz or 1.12MHz Switching Frequency

Always Alive 25mA LDO Regulator

8μA Standby Current

40-Pin 6mm × 6mm × 0.75mm QFN

LTCR3589應(yīng)用：

Handheld Instruments and Scanners

Portable Industrial Devices

Automotive Infotainment

Medical Devices

High End Consumer Devices

Multirail Systems

Supports Freescale i.MX, Marvell PXA and Other Application Processors

圖1。LTCR3589方框圖

圖2。LTCR3589典型應(yīng)用電路圖（1）

圖3。LTCR3589典型應(yīng)用電路圖（2）