This datasheet provides detailed information on the MIC2169 500kHz PWM synchronous buck control IC. The IC is high-efficiency, easy to use, small package, and can operate from a 3V to 14.5V input voltage without the need for any additional bias voltage. The output voltage can be precisely regulated down to 0.8V. The adaptive all N-Channel MOSFET drive scheme allows efficiencies over 95% across a wide load range. The IC senses current across the high-side N-Channel MOSFET, eliminating the need for an expensive and lossy current-sense resistor. Current limit accuracy is maintained by a positive temperature coefficient that tracks the increasing RDS(ON) of the external MOSFET. Further cost and space are saved by the internal in-rush-current limiting digital soft-start. The IC is available in a 10-pin MSOP package with a wide junction operating range of -40°C to +125°C. All support documentation can be found on Micrel's web site.