65V, 2A Synchronous Step-Down Regulator with 2.5A Quiescent Current Features: Wide Input Voltage Range: 3.4V to 65V Ultralow Quiescent Current Burst Mode® Operation: 2.5μA IQ Regulating 12VIN to 3.3VOUT Output Ripple < 10mVP-P High Efficiency Synchronous Operation: 94% Efficiency at 1A, 12VIN to 5VOUT 92% Efficiency at 1A, 12VIN to 3.3VOUT Fast 30ns Minimum Switch-On Time Low Dropout Under All Conditions: 250mV at 1A Safely Tolerates Inductor Saturation in Overload Low EMI Adjustable and Synchronizable: 200kHz to 2.2MHz Accurate 1V Enable Pin Threshold Internal Compensation Output Soft-Start and Tracking Small Thermally Enhanced 16-Lead MSOP and 24-Lead 3mm × 5mm QFN Packages