Microchip Technology MIC5219YM5-T5

Description
The MIC5219 is a linear voltage regulator with high peak output current capability, very low dropout voltage, and better than 1% output voltage accuracy. Dropout is typically 10mV at light loads and less than 500mV at full load. The MIC5219 is designed to provide a peak output current for start-up conditions where higher inrush current is demanded. It features a 500mA peak output rating. Continuous output current is limited only by package and layout.
The MIC5219 can be enabled or shut down by a CMOS or TTL compatible signal. When disabled, power consumption drops nearly to zero. Dropout ground current is minimized to help prolong battery life. Other key features include reversed-battery protection, current limiting, overtemperature shutdown, and low noise performance with an ultra-low-noise option.

Features
500mA output current capability
Low 500mV maximum dropout voltage at full load
Extremely tight load and line regulation
Tiny SOT-23-5 and MM8™ power MSOP-8 package
Ultra-low-noise output
Low temperature coefficient
Current and thermal limiting
Reversed-battery protection
CMOS/TTL-compatible enable/shutdown control
Near-zero shutdown current

Applications
Laptop, notebook, and palmtop computers
Cellular telephones and battery-powered equipment
Consumer and personal electronics
PC Card Vcc and Vpp regulation and switching
SMPS post-regulator/DC-to-DC modules
High-efficiency linear power supplies