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.

特性 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