General Description

The MIC3975 is a 750mA 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 MIC3975 offers extremely low dropout (typically 300mV at 750mA) and low ground current (typically 6.5mA at 750mA).

Features

• Fixed and adjustable output voltages to 1.24V

• 300mV typical dropout at 750mA

Ideal for 3.0V to 2.5V conversion

Ideal for 2.5V to 1.8V or 1.65V conversion

• Stable with ceramic capacitor

• 750mA 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 MSOP-8

Applications

• Fiber optic modules

• 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