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

DC-DC Switching Buck (Step Down) Regulator, Adjustable, 8V-55Vin, 3.3V-50Vout, 2Aout, DIP-8 Product Overview The L4978 is a step-down monolithic power Switching Regulator delivering 2A at a voltage between 3.3 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 0.25R) to obtain very high efficiency and high switching speed. A switching frequency up to 300kHz is achievable. A wide input voltage range between 8 to 55V and output voltage regulated from 3.3 to 50V cover the majority of today's applications. Features of this new generation of DC-to-DC converter include pulse-by-pulse current limit, hiccup mode for short-circuit protection, voltage feed-forward regulation, soft-start, protection against feedback loop disconnection, inhibit for zero current consumption and thermal shutdown. Protection against feedback disconnection Inhibit for zero current consumption Zero load current operation Internal current limiting (pulse-by pulse and hiccup mode) Precise 3.3V (±1%) internal reference voltage Applications Power Management Product Information Topology: Buck (Step Down) Input Voltage Min: 8V Input Voltage Max: 55V No. of Outputs: 1Outputs DC / DC Converter IC Case: DIP No. of Pins: 8Pins Output Current: 2A Output Voltage Min: 3.3V Output Voltage Max: 50V Switching Frequency: 300kHz Operating Temperature Max: 150°C