MIC5247 Datasheet | Micrel Semiconductor

Micrel 150m A Low-Voltage µCap Linear Regulator Preliminary Information General Description The MIC5247 is an efficient, precise low voltage CMOS voltage regulator optimized for ultra-low-noise applications. The MIC5247 offers better than 1% initial accuracy, and 85µA constant ground current over load (typically 85µA). The MIC5247 provides a very low noise output, ideal for RF applications where quiet voltage sources are required. A noise bypass pin is also available for further reduction of output noise. Designed specifically for hand-held and battery-powered devices, the MIC5247 provides a logic patible enable pin. When disabled, power consumption drops nearly to zero. The MIC5247 also works with low-ESR ceramic capacitors, reducing the amount of board space necessary for power applications, critical in hand-held wireless devices. Key Features include current limit, thermal shutdown, a pushpull output for faster transient response, and an active clamp to speed up device turnoff. Available in the Itty Bitty™ SOT-23-5 package, the MIC5247 also offers a range of fixed output voltages. Features - - - - - - - - - - - - - - - - - - - Ultralow noise Low voltage outputs Load independent, ultralow ground current: 85µA 150m A output current Current limiting Thermal Shutdown Tight load and line regulation “Zero” off-mode current Stability with low-ESR capacitors Fast transient response Logic-controlled enable input Cellular phones and pagers Cellular accessories Battery-powered equipment Laptop, notebook, and palmtop puters PCMCIA VCC and VPP regulation/switching Consumer/personal electronics SMPS post-regulator/dc-to-dc modules High-efficiency linear power supplies Applications Ordering Information Part Number MIC5247-1.5BM5 MIC5247-1.8BM5 MIC5247-2.0BM5 MIC5247-2.4BM5 Marking LU15 LU18 LU20 LU24 Voltage 1.5V 1.8V 2.0V 2.4V Junction Temp. Range - 40°C to +125°C - 40°C to +125°C - 40°C to +125°C - 40°C to +125°C Package SOT-23-5 SOT-23-5 SOT-23-5...