L4978 2A Step Down Switching Regulator IC SMD Package

With its soft-start, current limiting, and thermal shutdown features, the L4978 ensures safe and stable operation under all conditions. The switching frequency (typically 100 kHz) can be synchronized externally for noise-sensitive applications.

The IC supports both adjustable and fixed output voltage versions, allowing flexible use in multiple system designs. Its compact SMD package ensures efficient thermal management and easy PCB integration.

• 2A step-down (buck) switching regulator
• High efficiency (up to 90%) with low power loss
• Wide input voltage range (8V to 55V) for flexible applications
• Adjustable output voltage up to 50V
• Integrated internal NPN power switch for compact design
• Fixed-frequency PWM control (100 kHz) for predictable operation
• Soft-start function limits inrush current at power-up
• Overcurrent and thermal shutdown protection
• Low ripple and excellent load regulation
• Synchronization capability with external clock
• Compact and thermally efficient SMD package

Applications:

• Automotive power supplies and battery regulators
• Industrial control systems
• Microcontroller and logic power regulation
• Telecommunication and networking equipment
• Embedded systems and instrumentation
• Point-of-load (POL) converters
• General-purpose DC-DC conversion