描述 Description

The AAT3238 MicroPower? Low Dropout Linear Regulator is ideally suited for portable applications where very fast transient response, extended battery life, and small size are critical. The AAT3238 has been specifically designed for high-speed turn-on and turn-off performance, fast transient response, and good power supply ripple rejection (PSRR), and is reasonably low noise, making it ideal for powering sensitive circuits with fast switching requirements.
Other features include low quiescent current (typically 70μA) and low dropout voltage, typically less than 400mV at the maximum output current level of 300mA. The device is output short-circuit protected and has a thermal shutdown circuit for additional protection under extreme operating conditions.
The AAT3238 also features a low-power shutdown mode for extended battery life. A reference bypass pin has been provided to improve PSRR performance and output noise, by connecting a small external capacitor from the reference output to ground.
The AAT3238 is available in a space-saving 6-pin SOT23 or an 8-pin SC70JW package in factory-programmed voltages.

特性 Features

·Low dropout: 400mV at 300mA
·Guaranteed 300mA output
·High accuracy: ±1.5%
·70μA quiescent current
·Fast line and load transient response
·High-speed device turn-on and shutdown
·High power supply ripple rejection
·Low self noise
·Short-circuit protection
·Over-temperature protection
·Uses low ESR ceramic capacitors
·Noise reduction bypass capacitor
·Shutdown mode for longer battery life
·Low temperature coefficient
·Factory-programmed output voltages
·6-pin SOT23 or 8-pin SC70JW package

簡(jiǎn)介

AAT3238屬于集成電路（IC）的線性+開關(guān)穩(wěn)壓器。由制造生產(chǎn)的AAT3238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(gè)最小量，并且在工作時(shí)會(huì)將輸入端的任何多余電壓轉(zhuǎn)換為熱量。對(duì)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(duì)噪聲高度敏感的應(yīng)用。