MIC23050-4YML EVALUATION BOARD

The MIC23050 is a 500mA 4MHz switching regulator with HyperLight Load® mode. The MIC23050 is highly efficient throughout the load range and only draws 20μA of quiescent current. The MIC23050 operates from a 2.7V to 5.5V input and features internal power MOSFETs that can supply up to 500mA of output current. It can operate with a maximumduty cycle of 90%.

The MIC23050 has two modes of operation that is automatically selected by the internal circuitry. Under light load conditions from 1mA to 50mA, the MIC23050 goes into HyperLight Load mode. The MIC23050 HyperLight Load uses a Pulse-Frequency Modulation (PFM) control scheme that controls the off time at light load and keeps constant switching frequency in continuous mode. This allows the device to reduce the amount of switching needed at light loads, thus reducing the switching losses. The MIC23050 can attain 85% efficiency at 1mA output load. When the load is more than 50mA, HyperLight Load automatically switches back to Pulse-Width Modulation (PWM) mode to ensure high efficiency at higher loads. The two modes of operation ensure that the MIC23050 maintains the highest efficiency throughout the load range