AAT3238数据手册集成电路（IC）的线性+开关稳压器规格书PDF

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

简介

AAT3238属于集成电路（IC）的线性+开关稳压器。由制造生产的AAT3238稳压器 - 线性线性稳压器用于提供稳定的输出电压，无论负载电流、输入电压或环境因素如何变化，这些输出电压通常都要保持不变。它们的工作原理要求输入电压维持在高于所需的输出电压，而且要超出某个最小量，并且在工作时会将输入端的任何多余电压转换为热量。对于大多数应用而言，虽然这种稳压器的效率低于开关模式的稳压器，但它们通常更适合对噪声高度敏感的应用。