Conv DC-DC Single Step Down 8V to 55V 8-Pin PDIP

The L4978 is a step down monolithic power switching regulator delivering 2A at a voltage between 3.3V and 50V (selected by a simple external divider). Realized in BCD mixed technology, the device uses an internal power D-MOS transistor (with a typical Rdson of 0.25?) to obtain very high efficency and high switching speed.A switching frequency up to 300KHz is achievable (the maximum power dissipation of the packages must be observed). A wide input voltage range between 8V to 55V and output voltages regulated from 3.3V to 50V cover the majority of today’s applications. Features of this new generations of DC-DC converter include pulse-by-pulse current limit, hiccup mode for short circuit protection, voltage feedforward regulation, soft-start, protection against feedback loop disconnection, inhibit for zero current consumption and thermal shutdown.The device is available in plastic dual in line, DIP-8 for standard assembly, and SO16W for SMD assembly.

UP TO 2A STEP DOWN CONVERTER

OPERATING INPUT VOLTAGE FROM 8V TO 55V

PRECISE 3.3V (±1%) INTERNAL REFERENCE VOLTAGE

OUTPUT VOLTAGE ADJUSTABLE FROM 3.3V TO 50V

SWITCHING FREQUENCY ADJUSTABLE UP TO 300KHz

VOLTAGE FEEDFORWARD

ZERO LOAD CURRENT OPERATION

INTERNAL CURRENT LIMITING (PULSE-BYPULSE AND HICCUP MODE)

INHIBIT FOR ZERO CURRENT CONSUMPTION

PROTECTION AGAINST FEEDBACK DISCONNECTION

THERMAL SHUTDOWN

SOFT START FUNCTION