L6981N50DR

Voltage Regulators - DC DC Switching Regulators Overview

The L6981N50DR is a synchronous step-down switching regulator manufactured by STMicroelectronics. It operates with an input voltage range of 3.5 V to 38 V and provides a fixed output voltage of 5 V. The device delivers a maximum DC output current of 1.5 A. Key electrical parameters include a typical quiescent current of 17 μA for fixed output versions, a shutdown current of 2 μA, and an operating junction temperature range from -40 °C to +150 °C. It utilizes a SO-8L surface-mount package.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Synchronous buck topology with internal compensation network
• Low consumption mode (LCM) optimized for high efficiency at light loads
• Integrated thermal shutdown and pulse-by-pulse current protection

Voltage Regulators - DC DC Switching Regulators Applications

• Battery-powered industrial systems
• Noise-sensitive application power stages
• General-purpose point-of-load regulation

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'N' against the official datasheet to confirm it denotes the Low Consumption Mode variant. Ensure the ordering code matches the required fixed 5 V output specification. Confirm package type is SO-8L. Cross-reference the manufacturer part number directly with STMicroelectronics documentation to avoid substitution errors.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a 5 V output is required from a wide input voltage range up to 38 V. The LCM version is appropriate for applications prioritizing light-load efficiency. Consider the LNM variant if constant switching frequency and minimized ripple are critical requirements. Verify that the 1.5 A current rating meets the load demands.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the L6981 series of monolithic synchronous step-down regulators. The series includes variants with different output voltages and operational modes, such as the L6981C33DR which offers a 3.3 V output. The family is designed for compact power solutions in industrial and consumer electronics.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

The L6981C33DR serves as a functional substitute within the same series, offering identical electrical characteristics except for a fixed 3.3 V output instead of 5 V. Other L6981 variants may be considered if output voltage adjustments are permissible.