LT8614 Datasheet | Linear Technology

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 < 10m VP-P n Fast Minimum Switch On-Time: 30ns n Low Dropout Under All Conditions: 125m V at 1A n Safely Tolerates Inductor Saturation in Overload n Adjustable and Synchronizable: 200k Hz to 3MHz n Peak Current Mode Operation n Accurate 1V Enable Pin Threshold n Internal pensation 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 10m VP-P at any load, from zero to full current. The LT8614 allows high VIN to low VOUT conversion at high frequency with a fast minimum top switch on-time of 30ns. Operation is safe in overload even with a saturated inductor. Essential Features are included and easy to use: An opendrain PG pin signals when the output is in regulation. The SYNC pin allows clock synchronization and choice of Burst Mode operation or pulse-skipping mode. Soft-start and tracking functionality is accessed via the...