LT8612

LT8612 42V, 6A Synchronous Step-Down Regulator with 3µA Quiescent Current FEATURES n Wide Input Voltage Range: 3.4V to 42V n Ultralow Quiescent Current Burst Mode® Operation: nn 3μA IQ Regulating 12VIN to 3.3VOUT nn Output Ripple < 10mVP-P n High Efficiency Synchronous Operation: nn 95% Efficiency at 3A, 5VOUT from 12VIN nn 94% Efficiency at 3A, 3.3VOUT from 12VIN n Fast Minimum Switch-On-Time: 40ns n Low Dropout Under All Conditions: 250mV at 3A n Allows Use of Small Inductors n Safely Tolerates Inductor Saturation in Overload Conditions n Adjustable and Synchronizable: 200kHz to 2.2MHz n Current Mode Operation n Accurate 1V Enable Pin Threshold n Internal Compensation n Output Soft-Start and Tracking n Small Thermally Enhanced 3mm × 6mm 28-Lead QFN Package APPLICATIONS n Automotive and Industrial Supplies n General Purpose Step-Down n GSM Power Supplies DESCRIPTION The LT®8612 is a compact, high efficiency, high speed synchronous monolithic step-down switching regulator that consumes only 3µA of quiescent current. Top and bottom power switches are included with all necessary circuitry to minimize the need for external components. Low ripple Burst Mode operation enables high efficiency down to very low output currents while keeping the output ripple below 10mVP-P. A SYNC pin allows synchronization to an external clock. Internal compensation with peak current mode topology allows the use of small inductors and results in fast transient response and good loop...