描述 Description

The MIC3490 is a 100mA, highly accurate, low dropout regulator with high input voltage and ultra-low ground current. This combination of high input voltage and low ground current makes the MIC3490 ideal for multi-cell Li-Ion battery systems.A μCap LDO design, the MIC3490 is stable with either ceramic or tantalum output capacitors. It only requires a 2.2μF capacitor for stability.Features of the MIC3490 include enable input, thermal shutdown, current limit, reverse battery protection, and reverse leakage protection.Available in fixed and adjustable output voltage versions, the MIC3490 is offered in the SOT-23-5 package with a junction temperature range of -40°C to +125°C.The MIC3490 is pin to pin compatible with LM3490 which has been obsoleted.

特性 Features

? Wide input voltage range: 2.3V to 36V
? Ultra-low ground current: 18μA
? Low dropout voltage of 270mV at 100mA
? High output accuracy of ±2.0% over temperature
? μCap: stable with ceramic or tantalum capacitors
? Excellent line and load regulation specifications
? Zero off-mode current
? Reverse battery protection
? Reverse leakage protection
? Thermal shutdown and current limit protection
? IttyBitty? SOT-23-5 package

簡介

MIC3490屬于集成電路（IC）的線性+開關穩(wěn)壓器。由制造生產的MIC3490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。