MIC5250 Datasheet | Micrel Semiconductor

Micrel Dual 150m A µCap CMOS LDO Regulator Preliminary Information General Description The MIC5250 is an efficient, precise dual CMOS voltage regulator optimized for ultra-low-noise applications. The MIC5250 offers better than 1% initial accuracy, extremely low dropout voltage (typically 150m V at 150m A) and constant ground current over load (typically 100µA). The MIC5250 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 MIC5250 provides TTL logic patible enable pins. When disabled, power consumption drops nearly to zero. The MIC5250 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, pushpull outputs for faster transient response, and active clamps to speed up device turnoff. Available in the 10-lead MSOP (micro-shrink-outline package), the MIC5250 also offers a range of fixed output voltages. Features - Ultralow dropout- 100m V @ 100m A - Ultralow noise- 30µV(rms) - Stability with ceramic, tantalum, or aluminum electrolytic capacitors - Load independent, ultralow ground current - 150m A output current - Current limiting - Thermal Shutdown - Tight load and line regulation - “Zero” off-mode current - Fast transient response - TTL-Logic-controlled enable input Applications - - - - - - - - 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 Ordering Information Part Number MIC5250-2.7BMM MIC5250-2.8BMM MIC5250-3.0BMM MIC5250-3.3BMM Voltage 2.7V 2.8V 3.0V 3.3V Junction Temp. Range - 40°C to +125°C -...