描述 Description

The?MIC2205 is a high efficiency 2MHz PWM synchronous buck (step-down) regulator that features a LowQ? size, and high efficiency solution for portable power applications.In PWM mode, the MIC2205 operates with a constant frequency 2MHz PWM control. ?Under light load conditions, such as in system sleep or standby modes, the PWM switching operation can be disabled to reduce switching losses. In this light load LowQ? mode, the LDO maintains the output voltage and draws only 18μA of quiescent current. The LDO mode of operation saves battery life while not introducing spurious noise and high ripple as experienced with pulse skipping or bursting mode regulators.The MIC2205 operates from 2.7V to 5.5V input and features internal power MOSFETs that can supply up to 600mA output current in PWM mode. It can operate with a maximum duty cycle of 100% for use in low-dropout conditions.

特性 Features

? 2.7V to 5.5V supply voltage
? 18μA quiescent current
? Low noise,?75mVrms
? Output current to 600mA
? >95% efficiency
? 100% maximum duty cycle
? Fixed output voltage option available
? Ultra-fast transient response
? Stable with 1μF ceramic output capacitor
? Fully integrated MOSFET switches
? 40oC to 125oC junction temperature range
? Thermal shutdown and current limit protection

簡介

MIC2205屬于集成電路（IC）的穩(wěn)壓器-DC-DC開關穩(wěn)壓器。由制造生產(chǎn)的MIC2205穩(wěn)壓器 - DC-DC 開關穩(wěn)壓器DC-DC 開關穩(wěn)壓器 PMIC（電源管理集成電路）產(chǎn)品族中的產(chǎn)品是元器件級設備，用于需要穩(wěn)定 DC 輸入電壓和/或?qū)⑵滢D(zhuǎn)換為不同幅度的輸出電壓的應用。這些器件與稱為“控制器”PMIC 的類似產(chǎn)品的區(qū)別在于集成了主開關元件，設備提供的電力會通過該元件。