Product Description

The ON Semiconductor’s SmartOR CMPWR101 is a low dropout regulator that delivers up to 250 mA of load current at a fixed 3.3 V output. An internal threshold level (typically 4.1 V) is used to prevent the regulator from being operated below dropout voltage. The device continuously monitors the input supply and will automatically disable the regulator when VCC falls below the threshold level. When the regulator is disabled, a low impedance, fully integrated switch is enabled which allows the output to be directly powered from an auxiliary 3.3 V supply.

Features

? Automatic Detection of VCC Input Supply

? Glitch?Free Output During Supply Transitions

? Built?In Hysteresis During Supply Selection

? 250 mA Output Maximum Load Current

? Fully Integrated VAUX Switch

? Overload Current Protection

? Short Circuit Current Protection

? Operates from Either VCC or VAUX

? 8?Pin SOIC Package

? These Devices are Pb?Free and are RoHS Compliant

Applications

? PCI Adapter Cards

? Network Interface Cards (NICs)

? Dual Power Systems

? Systems with Standby Capabilities

CMPWR101屬于集成電路（IC） > 線性 + 開關穩(wěn)壓器。安森美半導體公司制造生產的CMPWR101穩(wěn)壓器 - 線性線性穩(wěn)壓器用于提供穩(wěn)定的輸出電壓，無論負載電流、輸入電壓或環(huán)境因素如何變化，這些輸出電壓通常都要保持不變。它們的工作原理要求輸入電壓維持在高于所需的輸出電壓，而且要超出某個最小量，并且在工作時會將輸入端的任何多余電壓轉換為熱量。對于大多數(shù)應用而言，雖然這種穩(wěn)壓器的效率低于開關模式的穩(wěn)壓器，但它們通常更適合對噪聲高度敏感的應用。