AAT3218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 AAT3218 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 AAT3218 has been specifically designed for high-speed turn-on and turnoff 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 200mV at the maximum output current level of 150mA. The device is output short-circuit protected and has a thermal shutdown circuit for additional protection under extreme operating conditions.
The AAT3218 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 device reference output to ground.
The AAT3218 is available in a Pb-free, space-saving 5-pin SOT23 or 8-pin SC70JW package in 16 factory-programmed voltages: 1.2V, 2.3V, 2.8V, 2.85V, or 3.5V.Please note: AAT3218IJS-1.2-T1 is being discontinued and is not recommended for new designs.

特性 Features

·Low Dropout: 200mV at 150mA
·Guaranteed 150mA 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 and Over-Temperature Protection
·Uses Low Equivalent Series Resistance (ESR) Ceramic Capacitors
·Output Noise Reduction Bypass Capacitor
·Shutdown Mode for Longer Battery Life
·Low Temperature Coefficient
·6 Factory-Programmed Output Voltages
·SOT23 5-Pin or SC70JW 8-Pin Package

简介

AAT3218属于集成电路（IC）的线性+开关稳压器。由制造生产的AAT3218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。