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Product Detailed Parameters
- Description：IC REG LINEAR 3.1V 50MA SOT23-5
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR)
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：16V
- Voltage - Output (Min/Fixed)：3.1V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：0.225V @ 50mA
- Current - Output：50mA
- Current - Quiescent (Iq)：150 µA
- Current - Supply (Max)：1.2 mA
- PSRR：45dB (1kHz)
- Control Features：Enable
- Protection Features：Over Current, Over Temperature
- Operating Temperature：-40°C ~ 125°C
- Mounting Type：Surface Mount
- Package / Case：SC-74A, SOT-753
- Supplier Device Package：SOT-23-5
- Grade：-
- Qualification：-
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Overview
The LD2982BM31R is a fixed-output low-dropout linear regulator manufactured by STMicroelectronics. It provides a stable 3.1V output with a maximum continuous current of 50mA. The device features a very low dropout voltage of 120mV at full load and maintains a typical quiescent current of 150µA. It includes an enable control feature for power management and offers protection against overcurrent and thermal overload. Packaged in a compact SOT-23-5 surface-mount case, it operates within a temperature range suitable for industrial applications.
Feature Summary
- Fixed 3.1V output voltage with 50mA current capability
- Very low dropout voltage ensures efficiency under varying loads
- Low quiescent current consumption extends battery life
- Integrated enable pin allows precise power control
Applications
- Portable consumer electronics requiring stable low-voltage rails
- Battery-powered devices needing efficient linear regulation
- Embedded systems utilizing microcontrollers or sensors
- Industrial control modules with space constraints
Procurement Notes
Verify the part status as obsolete before procurement planning. Confirm compatibility with existing PCB footprints and thermal requirements. Check for available alternative components from the same manufacturer family if supply chain continuity is critical. Ensure ordering suffixes match specific package and temperature grade requirements.
Selection Notes
Select this component when a fixed 3.1V rail is required with minimal board space. Consider its 50mA limit for load demands. Evaluate the dropout characteristics against input voltage variations. Compare quiescent current specifications with other LDOs for power-sensitive designs. Verify thermal dissipation capabilities in the intended enclosure.
Part Context
This regulator belongs to the LD2982 series of low-dropout linear regulators from STMicroelectronics. The series offers various fixed output voltages and packages. The BM31R suffix indicates the specific 3.1V output version in an SOT-23-5 package. Related parts include different voltage variants like LD2982BM18R and LD2982AM36R.
Replacement Considerations
Public confirmed substitute part numbers are not explicitly listed in the provided documentation. Users should consult official STMicroelectronics resources for cross-reference data or compatible alternatives within the LD298x family.
