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Product Detailed Parameters
- Description：IC REG LINEAR 1.8V 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)：1.8V
- 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 LD2982BM18R is a fixed-output linear voltage regulator from STMicroelectronics, providing a nominal output of 1.8V with a maximum load current of 50mA. It features a very low dropout voltage of 225mV at full load and supports input voltages up to 16V. The device is housed in a compact SOT-23-5 surface-mount package. Designed for low-noise applications, it includes an inhibit function and is compatible with low ESR capacitors. This component has reached the end-of-life status and is no longer manufactured by the original producer.
Feature Summary
- Fixed 1.8V output with 50mA maximum current capability
- Very low dropout voltage performance under load
- Integrated inhibit control function for power management
- Compatible with low equivalent series resistance (ESR) capacitors
Applications
- Portable battery-powered electronic devices
- Low-noise analog circuit power supplies
- Embedded systems requiring stable fixed voltage rails
- Consumer electronics with space-constrained designs
Procurement Notes
This specific part number is officially obsolete and no longer in production by STMicroelectronics. Procurement must focus on verified surplus or secondary market sources. Buyers should validate authenticity through authorized distributors or certified refurbishers. Ensure that any available units match the original specifications and packaging standards before integration into new designs.
Selection Notes
Designers seeking this regulator should consider its obsolete status when planning long-term production runs. Alternative components with similar electrical characteristics and pin compatibility should be evaluated for future-proofing. Verify that substitute parts meet the required input voltage range, output stability, and noise specifications to maintain system integrity without redesigning the PCB layout.
Part Context
The LD2982 series represents STMicroelectronics' line of low-dropout regulators designed for efficiency and noise reduction. The BM18R suffix indicates the specific 1.8V fixed output variant within this family. These regulators are engineered for applications where power efficiency and signal purity are critical, utilizing advanced semiconductor processes to minimize quiescent current and thermal dissipation.
Replacement Considerations
Publicly confirmed substitutes include the LP2985AIM5-1.8/NOPB from Texas Instruments. This alternative offers comparable fixed 1.8V output and low-dropout performance. Engineers should verify pinout compatibility and thermal requirements before swapping components in existing designs.
FAQ
Is the LD2982BM18R currently in active production?
No, the LD2982BM18R is classified as obsolete and is no longer manufactured by STMicroelectronics.
What is the maximum input voltage for this regulator?
The maximum input voltage supported by the LD2982BM18R is 16V.
