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General Description

The MIC5252 is an efficient, precise CMOS voltage regulator optimized for ultra-low-noise applications. It offers 1 initial accuracy, extremely-low dropout voltage (135mV at 150mA) and low ground current (typically 90?A). The MIC5252 provides a very-low-noise output, ideal for RF applications where a clean voltage source is required. The MIC5252 has a high PSRR even at low supply voltages, critical for battery operated electronics. A noise bypass pin is also available for further reduction of output noise.

Designed specifically for handheld and battery-powered devices, the MIC5252 provides a TTL-logic-compatible enable pin. When disabled, power consumption drops nearly to zero.

The MIC5252 also works with low-ESR ceramic capacitors, reducing the amount of board space necessary for power applications, critical in handheld wireless devices.

Features

? Input voltage range: 2.7V to 6.0V

? PSRR = 50dB @ VO + 0.3V

? Ultra-low output noise: 30?V(rms)

? Stability with ceramic output capacitors

? Ultra-low dropout: 135mV @ 150mA

? High output accuracy:

1.0 initial accuracy

2.0 over temperature

? Low quiescent current: 90?A

? Tight load and line regulation

? 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