CAT6218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 CAT6218 is a 300 mA CMOS low dropout regulator that provides fast response time during load current and line voltage changes.The quick-start feature allows the use of an external bypass capacitor to reduce the overall output noise without affecting the turn-on time of just 150 µs.With zero shutdown current and low ground current of 55 µA typical, the CAT6218 is ideal for battery-operated devices with supply voltages from 2.3 V to 5.5 V. An internal under voltage lockout circuit disables the output at supply voltages under 2.1 V typical.The CAT6218 offers 1% initial accuracy and low dropout voltage, 180 mV typical at 300 mA. Stable operation is provided with a small value ceramic capacitor, reducing required board space and component cost.Other features include fold-back current current limit and thermal protection.The device is available in the low profile (1 mm max height) 5-lead thin SOT23 package.

特性 Features

• Guaranteed 300 mA output current
• Low dropout voltage of 180 mV typical at 300 mA
• Stable with 1 µF ceramic output capacitor
• External 10 nF bypass capacitor for low noise
• Quick-start feature
• No-load ground current of 55 µA typical
• Full-load ground current of 80 µA typical
• ±1.0% initial accuracy (VOUT ≥ 2.0V)
• ±2.0% accuracy over temperature (VOUT ≥ 2.0V)
• “Zero” current shutdown mode
• Fold-back current limit and undervoltage lockout
• Thermal protection
• Thin SOT23-5 package

应用 Application

• Cellular phones
• Battery powered devices
• Consumer electronics

简介

CAT6218属于集成电路（IC）的线性+开关稳压器。由制造生产的CAT6218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。