描述 Description

The MIC2225 is a dual output regulator featuring a high efficiency 2MHz PWM synchronous buck (step-down) regulator and a 300mA LDO. The MIC2225 is an ultra-low noise, small size, and high efficiency solution for portable power applications, providing core and I/O supply rails for applications like application processors, camera DSPs and multimedia chipsets.In PWM mode, the MIC2225 operates with a constant 2MHz frequency. The MIC2225 switching regulator operates from 2.7V to 5.5V input and features internal power MOSFETs that can supply up to 600mA output current in PWM mode.

特性 Features

DC-DC Converter
? 2.7V to 5.5V supply voltage
? 2MHz PWM mode
? Output current to 600mA
? >95% efficiency
? 100% maximum duty cycle
? Fixed output voltage option down to 1V
? Ultra-fast transient response
? Stable with 2.2μF ceramic output capacitor
? Fully integrated MOSFET switches
? Micropower shutdown (1mA in shutdown)
? Thermal shutdown and current limit protection
? Pb-free 10-pin 2mm x 2mm?package
? -40°C to +125°C junction temperature range
LDO
? VIN?range 2.7V to 5.5V
? 300mA output current
? Output voltage down to 0.8V
? Thermal shutdown protection
? Current limit protection

簡介

MIC2225屬于集成電路（IC）的線性穩(wěn)壓器控制器。由制造生產(chǎn)的MIC2225穩(wěn)壓器 - 線性 + 開關此產(chǎn)品族中的產(chǎn)品用于構建執(zhí)行 DC-DC 轉換或電壓調節(jié)功能的電路，采用的是開關模式和線性穩(wěn)壓器功能的組合。雖然具體的拓撲各不相同，但此類產(chǎn)品的主要目的是將開關模式技術的效率優(yōu)勢與線性穩(wěn)壓技術的低噪聲特性結合在一起。