Stmicroelectronics (L4978) DC-DC Switching Buck (Step Down) Regulator

DC-DC Switching Buck (Step Down) Regulator, Adjustable, 8V-55Vin, 3.3V-50Vout,2Aout, DIP-8Product OverviewThe L4978 is a step-down monolithic power Switching Regulator delivering 2A at avoltage between 3.3 and 50V (selected by a simple external divider). Realized inBCD mixed technology, the device uses an internal power D-MOS transistor (with atypical Rdson of 0.25R) to obtain very high efficiency and high switching speed.A switching frequency up to 300kHz is achievable. A wide input voltage rangebetween 8 to 55V and output voltage regulated from 3.3 to 50V cover the majorityof today's applications. Features of this new generation of DC-to-DC converterinclude pulse-by-pulse current limit, hiccup mode for short-circuit protection,voltage feed-forward regulation, soft-start, protection against feedback loopdisconnection, inhibit for zero current consumption and thermal shutdown.Protection against feedback disconnectionInhibit for zero current consumptionZero load current operationInternal current limiting (pulse-by pulse and hiccup mode)Precise 3.3V (±1%) internal reference voltageApplicationsPower ManagementProduct InformationTopology: Buck (Step Down)Input Voltage Min: 8VInput Voltage Max: 55VNo. of Outputs: 1OutputsDC / DC Converter IC Case: DIPNo. of Pins: 8PinsOutput Current: 2AOutput Voltage Min: 3.3VOutput Voltage Max: 50VSwitching Frequency: 300kHzOperating Temperature Max: 150°C