MIC2225中文资料Ultra Small Dual Channel DC/DC + LDO数据手册Microchip规格书

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

简介

MIC2225属于集成电路（IC）的线性稳压器控制器。由制造生产的MIC2225稳压器 - 线性 + 开关此产品族中的产品用于构建执行 DC-DC 转换或电压调节功能的电路，采用的是开关模式和线性稳压器功能的组合。虽然具体的拓扑各不相同，但此类产品的主要目的是将开关模式技术的效率优势与线性稳压技术的低噪声特性结合在一起。