The LTC3801/LTC3801B are constant frequency current mode step-down DC/DC controllers in a low profile (1mm max) 6-lead SOT-23 (ThinSOTTM) package. The parts provide excellent AC and DC load and line regulation with 1.5% output voltage accuracy. The LTC3801 consumes only 195A of quiescent current in normal operation, dropping to 16A under no-load conditions.