描述 Description

The MCP1755/MCP1755S is a 16 volt, high PSRR voltage regulator with short circuit current foldback. The MCP1755/MCP1755S regulator provides up to 300 mA of current. The input operating voltage range is specified from 3.6V to 16V continuous, 18V absolute maximum, making it ideal for automotive and commercial 12 VDC systems. The MCP1755/ MCP1755S typically delivers 70 dB of ripple rejection at 1 kHz, making the device ideal for AC sensitive applications like GFCI and AFCI circuit breaker designs. The Current Foldback feature is a true short circuit current foldback. The device current will fall back towards 10 mA under short circuit conditions. When the short is removed, the device will recover and continue operating.

特性 Features

High PSRR: >70 dB @ 1 kHz typical
68.0 μA Typical Quiescent Current
Input Operating Voltage Range: 3.6V to16.0V
300 mA Output Current for all output voltages
Low Dropout Voltage, 300 mV typical @ 300 mA
0.85% Typical Output Voltage Tolerance
Standard Output Voltage Options (1.8V, 2.5V, 3.0V, 3.3V, 5.0V)
Output voltage range 1.8V to 5.5V in 0.1Vincrements
Output Voltage Tolerances of ±2.0% over entiretemperature range
Stable with minimum 1.0 μF output capacitance
Power Good Output
Shutdown Input
True Current Foldback Protection
Short-Circuit Protection
Overtemperature Protection

簡介

MCP1755S屬于集成電路（IC）的線性+開關(guān)穩(wěn)壓器。由制造生產(chǎn)的MCP1755S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(fù)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(zhuǎn)換為熱量。對于大多數(shù)應(yīng)用而言，雖然這種穩(wěn)壓器的效率低于開關(guān)模式的穩(wěn)壓器，但它們通常更適合對噪聲高度敏感的應(yīng)用。