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.

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 ≥ 2.0 V)

• ±2.0 Accuracy Over Temperature (VOUT ≥ 2.0 V)

• “Zero” Current Shutdown Mode

• Fold−back Current Limit and Under−voltage Lockout

• Thermal Protection

• Thin SOT23−5 Package

• These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS Compliant

Applications

• Cellular Phones

• Battery−powered Devices

• Consumer Electronics