MAX25231 Mini Buck Converter Analog Devices MAX25231 Mini Buck Converter is small, synchronous, and integrates high-side and low-side switches. The MAX25231 delivers up to 1.2A, with 3.5V to 36V input voltages, while using only 3.5µA quiescent current at no load. The Converter supports an accurate output voltage of ±2% within the normal operation input range of 6V to 18V. With 65ns minimum on-time capability, the Converter is capable of large input-to-output conversion ratios.