LD2982BM15R

Overview

The LD2982BM15R is an ultra-low dropout voltage regulator from STMicroelectronics, designed for low noise and low power applications in battery-powered systems. It features a fixed 1.5 V output voltage with ±0.5% tolerance (A version). The device operates with very low quiescent current of 80 μA typical at no load and less than 1 μA in off mode when the inhibit pin is pulled low. It supports logic-controlled electronic shutdown via pin 3 (TTL compatible) and is stable with low ESR ceramic capacitors. The unit provides guaranteed output current up to 50 mA and includes internal current and thermal limiting protection.

Feature Summary

• Ultra-low dropout voltage performance suitable for efficient power management
• Logic-controlled electronic shutdown function for standby power reduction
• Stable operation with low ESR ceramic output capacitors
• Internal current and thermal limit protection mechanisms

Applications

• Battery-powered instrumentation systems
• Industrial control boards
• Audio systems requiring low noise regulation
• Switching Mode Power Supply (SMPS) auxiliary rails

Procurement Notes

Verify the specific suffix 'M15R' against official STMicroelectronics documentation to confirm the fixed 1.5 V output voltage and SOT23-5L package configuration. Ensure compatibility with low ESR ceramic capacitors as specified in the datasheet. Confirm that the A-version tolerance requirements align with design specifications if precise voltage accuracy is critical. Cross-reference the inhibit pin functionality with system standby logic requirements.

Selection Notes

Select this component for designs requiring minimal quiescent current consumption and stable regulation with ceramic capacitors. The 1.5 V fixed output is suitable for powering low-voltage digital logic or analog circuits. The TTL-compatible inhibit pin allows direct microcontroller control for power management strategies. Consider the 50 mA output current capability and thermal limitations for the intended load profile.

Part Context

The LD2982 series belongs to STMicroelectronics' family of ultra-low dropout linear regulators. These devices are engineered for applications demanding low noise and high efficiency in portable and battery-operated equipment. The series offers various fixed output voltages and packages, with the LD2982BM15R specifically providing a 1.5 V output in a compact SOT23-5L package.

Replacement Considerations

Check for other LD298x variants with different output voltages or package options if the 1.5 V requirement changes. Verify pinout compatibility with alternative LDOs from ST or other manufacturers before substitution.