LT8612 Datasheet | Linear Technology

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 < 10m VP-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: 250m V at 3A n Allows Use of Small Inductors n Safely Tolerates Inductor Saturation in Overload Conditions n Adjustable and Synchronizable: 200k Hz to 2.2MHz n Current Mode Operation n Accurate 1V Enable Pin Threshold n Internal pensation 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 pact, 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 ponents. Low ripple Burst Mode operation enables high efficiency down to very low output currents while keeping the output ripple below 10m VP-P. A SYNC pin allows synchronization to an external clock. Internal pensation with peak current mode topology allows the use of small inductors and results in fast transient response and good loop stability. The EN/UV pin has an accurate 1V threshold and can be used to program VIN undervoltage lockout or to shut down the LT8612 reducing the input supply current to 1µA. A capacitor on the TR/SS pin programs the output voltage ramp rate during start-up. The PG flag signals when VOUT is within ±9% of the programmed output voltage as well as fault conditions. The LT8612 is available in a small 3mm × 6mm 28-lead QFN package with exposed pad for low thermal resistance. L, LT, LTC, LTM, Burst...