MIC5245

MIC5245 Micrel MIC5245 150mA µCap CMOS LDO Regulator Preliminary Information General Description The MIC5245 is an efficient, precise CMOS voltage regulator optimized for ultra-low-noise applications. The MIC5245 offers better than 1% initial accuracy, extremely low dropout voltage (typically 150mV at 150mA) and constant ground current over load (typically 100µA). The MIC5245 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 MIC5245 provides a TTL logic compatible enable pin. When disabled, power consumption drops nearly to zero. The MIC5245 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 IttyBitty™ SOT-23-5 and power MSO-8 packages, the MIC5245 also offers a range of fixed output voltages. Features Ultralow dropout—100mV @ 100mA Ultralow noise—30µV(rms) Stability with tantalum or ceramic capacitors Load independent, ultralow ground current 150mA output current Current limiting Thermal Shutdown Tight load and line regulation “Zero” off-mode current Fast transient response T...