L6981C50DR

Voltage Regulators - DC DC Switching Regulators Overview

The L6981C50DR is a synchronous step-down converter manufactured by STMicroelectronics, designed for high-efficiency power management in compact systems. It operates with an input voltage range of 3.5 V to 38 V and delivers a fixed output voltage of 5 V at up to 1.5 A DC. The device features a low quiescent current of 20 µA and a shutdown current of 2 µA. It utilizes a peak current mode architecture with internal compensation, housed in an SO-8 package. The operating temperature range spans from -40 °C to +150 °C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Synchronous buck topology with integrated power switches for high efficiency across all load conditions
• Internal compensation network minimizes external component count and design complexity
• Low quiescent current operation suitable for battery-powered applications
• Integrated protection functions including thermal shutdown and pulse-by-pulse current limiting

Voltage Regulators - DC DC Switching Regulators Applications

• 24 V industrial bus-powered systems
• HVAC power supplies
• Battery-powered equipment
• Decentralized intelligent nodes
• Smart sensors and always-on devices

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'C50' confirms the 5 V fixed output variant when ordering. Confirm the 'DR' suffix indicates reel packaging if bulk supply is required. Ensure the SO-8 package type matches the PCB footprint requirements. Cross-reference the manufacturer part number directly with official STMicroelectronics documentation to avoid confusion with similar L6981 variants.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 5 V output is required from a wide input voltage range up to 38 V. The internal compensation simplifies layout compared to externally compensated regulators. Consider the SO-8 package for space-constrained designs requiring surface mount technology. Evaluate the 1.5 A output current capability against peak load demands to ensure adequate thermal performance within the specified temperature range.

Voltage Regulators - DC DC Switching Regulators Part Context

The L6981 series comprises synchronous step-down converters available in multiple output voltage configurations. The L6981C50DR specifically provides a fixed 5 V output, distinguishing it from adjustable or other fixed voltage variants like the 3.3 V version. This family shares common architectural features such as peak current mode control and low standby currents, tailored for industrial and consumer power management needs.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Publicly confirmed substitute part numbers are not provided in the source material. Verify compatibility with existing circuit designs before considering alternative components.