LD2982BM35R

Overview

The LD2982BM35R is a fixed-output linear voltage regulator from STMicroelectronics, providing a stable 1.8 V output with a maximum load current of 50 mA. It features an ultra-low dropout voltage of 120 mV at the rated load and maintains low noise performance with 30 µVRMS output ripple. The device operates within a standard SOT-23-5 package, designed for applications requiring precise voltage regulation in space-constrained environments.

Feature Summary

• Ultra-low dropout voltage capability ensures efficient operation even with minimal input-to-output voltage differentials.
• Low quiescent current consumption extends battery life in portable electronic devices.
• Fixed 1.8 V output provides stable power supply without external feedback components.

Applications

• Portable consumer electronics requiring stable low-voltage power rails
• Battery-powered systems where energy efficiency is critical
• Embedded circuits needing low-noise voltage regulation

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and check for obsolete status indicators, as some variants may be discontinued. Ensure packaging matches design requirements and validate part markings against official datasheets to prevent counterfeit risks.

Selection Notes

Select this regulator when a fixed 1.8 V output is required with minimal dropout characteristics. Consider thermal management due to the small SOT-23-5 package size. Evaluate input voltage range relative to the 120 mV dropout specification under expected load conditions to ensure stable regulation.

Part Context

Part of the LD2982 series of low-dropout regulators designed for low-power applications. The BM35 suffix indicates the specific 1.8 V output variant in the SOT-23-5 package. This series emphasizes low noise and high PSRR for sensitive analog circuits.

Replacement Considerations

Check for pin-compatible alternatives within the same LD2982 family offering different output voltages. Verify that substitute parts maintain similar dropout voltage and quiescent current specifications to ensure circuit compatibility without redesign.

FAQ

What is the typical output noise voltage of the LD2982BM35R?

The typical output noise voltage is 30 µVRMS over the frequency range of 10 Hz to 100 kHz.

Does the LD2982BM35R include short-circuit protection?

Yes, the device incorporates internal circuitry to protect against short-circuit conditions on the output.