General Description

The MIC37100, MIC37101, and MIC37102 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 MIC37100/01/02 offers extremely low dropout (typically 280mV at 1A) and low ground current (typically 11mA at 1A).

Features

• Fixed and adjustable output voltages to 1.24V

• µCap Regulator, 10µF ceramic output capacitor stable

• 280mV typical dropout at 1A

– Ideal for 3.0V to 2.5V conversion

– Ideal for 2.5V to 1.8V, 1.65V or 1.5V conversion

• 1A minimum guaranteed output current

• 1 initial accuracy

• Low ground current

• Current limiting and thermal shutdown

• Reversed-leakage protection

• Fast transient response

• Low-profile SOT-223 package

• Power SO-8 package

• S-PAK package (MIC37102 only)

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