LT8614

LT8614 42V, 4A Synchronous Step-Down Silent Switcher with 2.5µA Quiescent Current FEATURES DESCRIPTION n Silent Switcher® Architecture n Ultralow EMI Emissions n High Efficiency at High Frequency n Up to 96% Efficiency at 1MHz, 12VIN to 5VOUT n Up to 94% Efficiency at 2MHz, 12VIN to 5VOUT n Wide Input Voltage Range: 3.4V to 42V n Ultralow Quiescent Current Burst Mode® Operation: n 2.5μA IQ Regulating 12VIN to 3.3VOUT n Output Ripple < 10mVP-P n Fast Minimum Switch On-Time: 30ns n Low Dropout Under All Conditions: 125mV at 1A n Safely Tolerates Inductor Saturation in Overload n Adjustable and Synchronizable: 200kHz to 3MHz n Peak Current Mode Operation n Accurate 1V Enable Pin Threshold n Internal Compensation n Output Soft-Start and Tracking n Small 18-Lead 3mm × 4mm QFN n AEC-Q100 Qualified for Automotive Applications APPLICATIONS n Automotive and Industrial Supplies n General Purpose Step-Down n GSM Power Supplies The LT®8614 step-down regulator features Silent Switcher architecture designed to minimize EMI emissions while delivering high efficiency at frequencies up to 3MHz. Assembled in a 3mm × 4mm QFN, the monolithic construction with integrated power switches and inclusion of all necessary circuitry yields a solution with a minimal PCB footprint. An ultralow 2.5µA quiescent current—with the output in full regulation— enables applications requiring highest efficiency at very small load currents. Transient response remains excellent and output voltage ripple is below...