MIC3490-3.0YM5-TR屬于集成電路（IC）的線性+開關穩(wěn)壓器。由微芯科技股份有限公司制造生產(chǎn)的MIC3490-3.0YM5-TR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。

General Description

The MIC3490 is a 100 mA, highly accurate,

low-dropout regulator with high input voltage and

ultra-low ground current. This combination of high

voltage and low ground current makes the MIC3490

ideal for multi-cell Li-Ion battery systems.

As a μCap LDO design, the MIC3490 is stable with

either ceramic or tantalum output capacitors. It only

requires a 2.2 μF output capacitor for stability.

Features of the MIC3490 include enable input, thermal

shutdown, current limit, reverse battery protection and

reverse leakage protection.

Available in five output voltage options (1.8V, 2.5V,

3.0V, 3.3V and 5.0V), the MIC3490 is offered in a 5-pin

SOT23 package with a junction temperature range of

-40°C to + 125°C.

特性 Features

? Wide Input Voltage Range: 2.3V to 36V

? Ultra-Low Ground Current: 18 μA

? Low Dropout Voltage of 270 mV at 100 mA

? High Output Accuracy of ±2.0 Overtemperature

? μCap: Stable with Ceramic or Tantalum

Capacitors

? Excellent Line and Load Regulation Specifications

? Near Zero Shutdown Current: Typical 0.1 μA

? Reverse Battery Protection

? Reverse Leakage Protection

? Thermal Shutdown and Current-Limit Protection

? SOT23-5 Package

? The MIC3490 is Pin-to-Pin Compatible with

LM3940

Applications

? Keep-Alive Supply in Notebook and Portable

Computers

? USB Power Supply

? Logic Supply for High-Voltage Batteries

? Automotive Electronics

? Battery-Powered Systems

? 3 to 4-Cell Li-Ion Battery Input Range