General Description

The MIC39100, MIC39101, and MIC39102 are 1A low-dropout linear voltage regulators that provide low-voltage, high-current output from an extremely small package. Utilizing Micrel’s proprietary Super βeta PNP™ pass element, the MIC39100/1/2 offers extremely low dropout (typically 410mV at 1A) and low ground current (typically 11mA at 1A).

Features

•  Fixed and adjustable output voltages to 1.24V

•  410mV typical dropout at 1A

  Ideal for 3.0V to 2.5V conversion

  Ideal for 2.5V to 1.8V conversion

•  1A minimum guaranteed output current

•  1% initial accuracy

•  Low ground current

•  Current limiting and thermal shutdown

•  Reversed-battery protection

•  Reversed-leakage protection

•  Fast transient response

•  Low-profile SOT-223 package

•  Power SO-8 package

Applications

•  LDO linear regulator for PC add-in cards

•  PowerPC™ power supplies

•  High-efficiency linear power supplies

•  SMPS post regulator

•  Multimedia and PC processor supplies

•  Battery chargers

•  Low-voltage microcontrollers and digital logic