Datasheet
L4971 is a 1.5A step down switching regulator that delivers 1.5A 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 0.25Ω) to obtain very high efficency and high switching speed.
User Manual
The L4971 is a 1.5A step-down switching regulator with an input voltage range of 8V to 55V and an output voltage range of 3.3V to 50V. The output voltage can be adjusted using an external divider. The device is fabricated in BCD mixed technology, using an internal power D-MOSFET (with a typical Rdson of 0.25 Ω) to achieve very high efficiency and high switching speed. A switching frequency up to 300KHz is possible (the maximum power dissipation of the packages must be observed). A wide input voltage range of 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, DIP8 for standard assembly, and SO16W for SMD assembly.
