MIC23250-C4YMT EVALUATION BOARD

The MIC23250 is a dual 400mA 4MHz switching regulator with HyperLight Load™ mode. The MIC23250 is highly efficient, consuming 33μA of quiescent current to operate both of its outputs. A Sub-1mm height solution is easily attainable using the tiny package (2mm x 2mm x 0.55mm) and only six external components. Small and fast, the MIC23250 can respond to a load transient at ultra-fast speed while reducing output peak-to-peak voltage.

The MIC23250 has two modes of operation that is automatically selected by the internal circuitry. Under light load conditions, the MIC23250 goes into HyperLight Load™ mode. The MIC23250 HyperLight Load™ uses a Pulse-Frequency Modulation (PFM) control scheme that controls the off time at light load. This allows the device to reduce the amount of switching needed at light load, thus reducing the switching losses. The MIC23250 can attain up to 85% efficiency at 1mA output load. At higher output currents of approximately 100mA, HyperLight Load™ mode automatically switches back to Pulse-Width Modulation (PWM) mode to ensure high efficiency up to 94% at higher load. The two modes of operation ensure that the MIC23250 maintains the highest efficiency throughout the entire load range.