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Product Detailed Parameters
- Description：IC REG LINEAR 4V 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)：4V
- 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 LD2982AM40R is a fixed-output low-dropout (LDO) voltage regulator manufactured by STMicroelectronics. It provides a stable 4.0 V output with a maximum continuous current of 50 mA. The device supports an input voltage range up to 16 V and features a typical dropout voltage of 3 mV at zero load current. Packaged in a compact SOT-23-5L surface-mount case, it is designed for applications requiring low noise and high power supply rejection ratio (PSRR). This component is classified as obsolete and is no longer in active production.
Feature Summary
- Fixed 4.0 V output voltage
- Low dropout operation
- Compact SOT-23-5L package
Applications
- Portable battery-powered devices
- Embedded systems power supplies
- RF circuit biasing
Procurement Notes
This part number is officially marked as obsolete by the manufacturer. Procurement should focus on verified substitute components or alternative manufacturers offering equivalent specifications. Verify that replacement parts meet the required electrical parameters, including output voltage tolerance, current capacity, and package dimensions, to ensure compatibility with existing designs.
Selection Notes
Select this component only if legacy design compatibility is required. For new designs, consider modern equivalents with improved availability. Ensure the application does not exceed the 50 mA output current limit. Verify thermal performance under expected load conditions, as the small SOT-23-5L package has limited heat dissipation capabilities compared to larger packages.
Part Context
The LD2982 series represents STMicroelectronics' line of ultra-low noise LDO regulators. The AM40R suffix indicates the specific 4.0 V fixed output variant in the SOT-23-5L package. This series was designed for sensitive analog and RF circuits requiring clean power rails with minimal ripple and noise.
Replacement Considerations
The LP2985AIM5-4.0/NOPB from Texas Instruments is listed as a similar available substitute. Verify pinout compatibility and electrical parameter alignment before substitution.
