General Description

The MIC5253 is an efficient, CMOS voltage regulator optimized for ultra-low-noise applications. It offers 1.5% initial accuracy, extremely low dropout voltage (165mV at 100mA), and low ground current (typically 95µA at full load). The MIC5253 provides a very low noise output, ideal for RF applications where a clean voltage source is required. A noise bypass pin is also available for further reduction of output noise.

Features

• Input voltage range: 2.7V to 5.5V

• Teeny™ SC-70-5 package

• Ultra-low output noise: 30µV(rms)

• 100mA continuous output current, 150mA peak current

• Stability with ceramic output capacitors

• Ultralow dropout: 165mV @ 100mA

• High output accuracy:

1.5% initial accuracy

3.0% over temperature

• Low ground current: 95µA

• TTL-Logic-controlled enable input

• “Zero” off-mode current

• Thermal shutdown and current limit protection

Applications

• Cellular phones and pagers

• Cellular accessories

• Battery-powered equipment

• Laptop, notebook, and palmtop computers

• Consumer/personal electronics