STMicroelectronics Buck Converter Surface Mount 3.5V 300μA Output, 2.25W HSOP L5973AD

The STMicroelectronics L5973AD is a high-performance buck converter in a surface mount HSOP package, engineered to provide a reliable and accurate regulated 3.5V output from a wide range of input voltages. This device is well-suited for integration into power management subsystems within industrial, instrumentation, and embedded electronic devices.

At the core of the L5973AD is a monolithic DC-DC switching regulator, capable of accepting input voltages from as low as 4V up to 36V, making it an ideal choice for battery-powered equipment, distributed power architectures, or any design requiring robust step-down voltage conversion. The converter supplies an output current of up to 300μA, which is particularly effective for low-power circuits, sensor interfaces, and auxiliary modules within larger systems.

This converter features a high efficiency of 90%, contributing to low thermal dissipation even under continuous use. Its line regulation of 10mV and load regulation of 15mV ensure consistent voltage output despite input fluctuations or varying load conditions, supporting stable equipment operation over time. The 2.25W power rating allows for dependable performance in demanding environments and under diverse electrical loads.

Engineered with an 8-pin HSOP package, the compact design measures just 5mm in length, 4mm in width, and 1.7mm in depth, supporting the development of dense circuit layouts and space-constrained PCB designs. Its broad operating temperature range of -40°C to 150°C enables application in both industrial and automotive contexts, where extreme environmental conditions may be encountered.

Typical use cases include powering sensors, control logic, modular circuits, communication devices, or any embedded subsystem requiring a stable step-down regulated voltage with stringent power and efficiency requirements. The surface mount form factor allows for efficient assembly in automated production lines and maintenance-friendly replacement.

The STMicroelectronics L5973AD's rugged electrical performance, miniature footprint, and broad tolerance to environmental extremes make it a preferred solution in industrial automation, instrumentation, consumer electronics, and precision control circuits. Explore additional DC-DC Converters and power supply solutions from STMicroelectronics and related industrial power management categories on EnvMart.