LD2982AM47R

Overview

The LD2982AM47R is a fixed-output low-dropout linear voltage regulator manufactured by STMicroelectronics. It provides a stable 4.7 V output with a maximum load current of 50 mA. The device features a very low quiescent current of 150 µA and a supply current of up to 1.2 mA. It includes logic-controlled inhibit functionality for power management. Protection features include overcurrent and thermal shutdown. The component is housed in an SC-74A (SOT-753) package, designed for space-saving applications requiring efficient single-output voltage conversion.

Feature Summary

• Fixed 4.7 V output voltage with 50 mA maximum load capability
• Logic-controlled inhibit function for system power management
• Integrated overcurrent and thermal protection mechanisms
• Low quiescent current consumption for energy efficiency

Applications

• Portable electronic devices requiring stable 4.7 V rails
• Battery-powered systems needing low standby current
• Embedded circuits with logic-controlled power sequencing
• Space-constrained PCB designs utilizing SOT-753 packages

Procurement Notes

Verify the exact suffix '47R' corresponds to the 4.7 V fixed output variant. Confirm RoHS compliance status as documentation may vary by production batch. Ensure the SC-74A/SOT-753 package marking matches your assembly requirements. Cross-reference the manufacturer part number with official STMicroelectronics databases to avoid counterfeit components.

Selection Notes

Select this component when a precise 4.7 V regulation is required with minimal board space. The 50 mA output current limits suitability for high-power loads. Consider the inhibit pin requirement for active power control. Evaluate the dropout voltage characteristics against your input voltage range to ensure stable regulation under varying load conditions.

Part Context

This part belongs to the LD2982 series of low-dropout regulators from STMicroelectronics. The series offers various fixed output voltages and package options. The LD2982AM47R specifically targets applications needing a 4.7 V rail with integrated protection and enable control. It complements other LDOs in the portfolio offering different current ratings or voltage outputs.

Replacement Considerations

Check for direct substitutes within the LD2982 family with compatible output voltages. Verify pin compatibility for SC-74A packages. Ensure replacement parts maintain similar quiescent current and protection feature sets. Consult official cross-reference lists for validated alternatives.