General Description

The MIC5246 is an efficient, precise CMOS voltage regulator optimized for low-noise applications. The MIC5246 offers better than 1% initial accuracy, extremely-low-dropout volt age (typically 150mV at 150mA) and constant ground current (typically 85µA)over load . The MIC5246 features an error flag that indicates an output fault condition such as overcurrent, thermal shutdown and dropout. The MIC5246 provides a very low noise output, ideal for RF applications where quiet voltage sources are required.

Designed specifically for hand-held and battery-powered devices, the MIC5246 provides a TTL-logic-compatible enable pin. When disabled, power consumption drops nearly to zero.

Features

• Error flag indicates fault condition

• Ultralow dropout—100mV @ 100mA

• Load independent, ultralow ground current: 85µA

• 150mA output current

• Current limiting

• Thermal Shutdown

• Tight load and line regulation

• “Zero” off-mode current

• Stability with low-ESR capacitors

• Fast transient response

• TTL-Logic-controlled enable input

Applications

• Cellular phones and pagers

• Cellular accessories

• Battery-powered equipment

• Laptop, notebook, and palmtop computers

• PCMCIA VCC and VPP regulation/switching

• Consumer/personal electronics

• SMPS post-regulator/dc-to-dc modules

• High-efficiency linear power supplies