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

應(yīng)用 Application

? Cellular phones
? Battery powered devices
? Consumer electronics

簡介

CAT6218屬于集成電路（IC）的線性+開關(guān)穩(wěn)壓器。由制造生產(chǎn)的CAT6218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。