The LT3845 is a current mode controller with an integrated biasing regulator that drives N-channel MOSFETs. Current mode operation provides fast line and load transient response, as well as cycle-by-cycle overcurrent protection. The integrated regulator provides IC power directly from the input supply without the need for a separate bias voltage. It maintains high efficiency at light loads with its Burst Mode® operation and 120uA quiescent current, a feature required in many automotive and battery-supplied input applications. Other features include short-circuit protection, adjustable soft-start, thermal shutdown and precision input undervoltage lockout. The LT3845 employs adaptive overlap control, which maintains a constant dead time, preventing shoot-through switch currents, independent of the type, size or operating conditions of the external MOSFET switches.
The LT3845 is offered in a 16-pin thermally enhanced TSSOP package and is rated for operation from -40°C to 125°C. The 1,000-piece price starts at $3.56.