L6981CDR

Voltage Regulators - DC DC Switching Regulators Overview

The L6981CDR is a synchronous monolithic step-down switching regulator from STMicroelectronics, designed for industrial power systems. It delivers up to 1.5 A DC output current with an operating input voltage range of 3.5 V to 38 V. The device supports adjustable output voltages from 0.85 V to VIN and features a low consumption mode (LCM) optimized for high efficiency at light loads. Packaged in an SO-8L format, it integrates internal compensation, a 2 μA shutdown current, and pulse-by-pulse current protection.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Implements peak current mode architecture with internal compensation to minimize design complexity
• Features Low Consumption Mode (LCM) to maximize efficiency at light loads with controlled ripple
• Includes enable/disable functionality via EN pin with typical 2 μA shutdown current
• Integrates thermal shutdown and overvoltage protection to prevent thermal runaway

Voltage Regulators - DC DC Switching Regulators Applications

• Industrial power systems requiring wide input voltage ranges
• Battery-powered applications needing high light-load efficiency
• Noise-sensitive applications utilizing Low Noise Mode variants
• Point-of-load regulation in compact embedded designs

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix against official documentation to confirm operational mode. The CDR suffix typically denotes the Low Consumption Mode variant within the L6981 series. Ensure compatibility with required output voltage ranges and thermal management strategies. Confirm package integrity and RoHS compliance status prior to integration into final hardware designs.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a wide input voltage range up to 38 V is required alongside high efficiency at light loads. The internal compensation simplifies external component count compared to non-compensated alternatives. Consider the SO-8L package size constraints and thermal dissipation requirements for the target application environment.

Voltage Regulators - DC DC Switching Regulators Part Context

The L6981CDR belongs to the L6981 family of synchronous buck converters. This series includes variants such as the L6981NDR, which offers Low Noise Mode capabilities. The family shares common architectural features like peak current mode control and robust protection mechanisms, tailored for different noise and efficiency priorities.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct substitutes include other L6981 series variants like the L6981NDR for noise-critical applications. Cross-reference electrical parameters and package dimensions to ensure mechanical and functional compatibility without redesigning the PCB layout.