The MIC23250 is a high efficiency 4MHz dual 400mA synchronous buck regulator with Hyper Light LoadTM. Hyper Light LoadTM provides all the advantages of standard light load modes, such as low quiescent current and high efficiency but also allows the use of very small output capacitors to maintain low output ripple voltage throughout the entire load range. This benefit is not possible with other light load mode types as they trade off control speed for low standby currents. With Hyper Light LoadTM, the output capacitor can be reduced by up to a factor of 20 saving cost and valuable board space. The tiny package (2mm x 2mm Thin MLF) of MIC23250 also saves crucial board space by using only six external components while regulating two independent outputs up to 400mA each. The device is designed for use with a 1H inductor and a 4.7F output capacitor that enables a sub-1mm height. The MIC23250 has a very low quiescent current of 35A and can achieve over 85% efficiency at 1mA. At higher loads the MIC23250 provides a constant switching frequency around 4MHz while providing peak efficiencies up to 94%.