General Description

The MIC39150, MIC39151, and MIC39152 are 1.5A LDO voltage regulators that provide a low voltage, high current output with a minimum of external components. Utilizing Micrel’s proprietary Super βeta PNP® pass element, the MIC39150/1/2 offers extremely low dropout (typically 375mV at 1.5A) and low ground current (typically 17mA at 1.5A).

The MIC39150/1/2 are ideal for PC add-in cards that need to convert from 3.3V to 2.5V or 2.5V to 1.8V with a guaranteed maximum dropout voltage of 500mV over all operating conditions. The MIC39150/1/2 exhibit fast transient response for heavy switching applications and requires only 10µF of output capacitance to maintain stability and achieve fast transient response.

Features

• 1.5A minimum guaranteed output current

• 500mV maximum dropout voltage over temperature

–Ideal for 3.0V to 2.5V conversion

–Ideal for 2.5 to 1.8V or 1.65V conversion

• 1% initial accuracy

•Low ground current

• Current limiting and Thermal shutdown

• Reversed-battery and reversed lead insertion protection

•Reversed-leakage protection

• Fast transient response

• TTL/CMOS compatible enable pin (MIC39151/2 only)

• Error flag output (MIC39151 only)

• Adjustable output (MIC39152 only)

• Power D-Pak package (TO-252) Adjustable only

• Power D²Pak package (TO-263)

Applications

• Low-voltage digital ICs

• LDO linear regulator for PC add-in cards

• High-efficiency linear power supplies

• SMPS post regulator

• Low-voltage microcontrollers

• StrongARM™ processor supply