L4978D,Step-Down Switching Regulator,SO16,2A

The L4978D - SO16 is a high-efficiency 2A step-down switching regulator from STMicroelectronics. It operates over a wide input voltage range of 8V to 55V, making it suitable for applications in industrial power supplies, automotive systems, telecommunications, and battery-powered devices. The L4978D delivers a high-efficiency output, capable of converting voltages down to 3.3V from higher input sources, with a precise internal reference voltage of ±1%.

The regulator's output voltage can be adjusted between 3.3V and 50V using a simple external divider, offering flexibility in design. Its switching frequency, which is adjustable up to 300kHz, allows for reduced external component size, making the device ideal for compact, space-constrained designs.

The L4978D features pulse-by-pulse current limiting, thermal shutdown, and soft-start functionality, ensuring safe and reliable operation even under heavy load or short-circuit conditions. With its low zero-load current operation and inhibit mode for zero current consumption, the L4978D is perfect for energy-efficient designs.

Packaged in a SO16 form, the L4978D is designed for surface-mount applications where space and reliability are critical.

• 2A Step-Down Converter – Provides up to 2A of output current for high-performance applications.
• Wide Input Voltage Range – Operates from 8V to 55V, making it versatile for various power supply designs.
• Adjustable Output Voltage – Output voltage adjustable from 3.3V to 50V, with a precise 3.3V internal reference voltage.
• High-Efficiency Operation – Efficiency of up to 87%, with an integrated DMOS transistor and high-speed switching capability.
• Switching Frequency up to 300kHz – Allows for compact design with reduced external component size.
• Advanced Protection Features – Includes pulse-by-pulse current limiting, thermal shutdown, and protection against feedback disconnection.