MIC4950

MIC4950 Hyper Speed Control™ 5A Buck Regulator General Description The MIC4950 is a high-efficiency, 5A synchronous buck regulator with ultra-fast transient response. It is perfectly suited for supplying processor core and I/O voltages from a 5V or 3.3V bus. The MIC4950 provides a switching frequency up to 3.3MHz while achieving peak efficiencies up to 95%. An additional benefit of high-frequency operation is very low output ripple voltage throughout the entire load range with the use of a small output capacitor. The MIC4950 is designed for use with a very small inductor, down to 1µH, and an output ceramic capacitor as small as 10µF, without the need for external ripple injection. A wide range of output capacitor types and values can also be accommodated. The MIC4950 supports safe start-up into a pre-biased output, and offers short-circuit and thermal shutdown protections. The MIC4950 is available in 8-Pin SOIC and 10-Pin 3mm × 4mm DFN packages with an operating junction temperature range from –40°C to +125°C. Datasheets and support documentation are available on Micrel’s web site at: www.micrel.com. Features               Input voltage: 2.7V to 5.5V 5A output current Up to 95% efficiency Up to 3.3MHz operation Safe start-up into a pre-biased output Power Good output Ultra-fast transient response Low output voltage ripple Low RDSON integrated MOSFET switches 0.01µA shutdown current Thermal shutdown and current limit protection Output voltage as low as 0.7V 8-P...