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