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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 LD2982AM31R is a fixed-output ultra-low-drop voltage regulator manufactured by STMicroelectronics. It provides a fixed output voltage of 3.1 V with a maximum guaranteed output current of 100 mA. The device features an ultra-low quiescent current of 80 μA in on mode and less than 1 μA in sleep mode when the inhibit pin is pulled low. It operates within a temperature range of -40 °C to 125 °C and utilizes a SOT-23-5L package.
Feature Summary
- Ultra-low dropout voltage operation suitable for low noise applications
- Logic-controlled electronic shutdown via TTL-compatible inhibit pin
- Designed for use with low ESR ceramic capacitors
Applications
- Cellular phones
- Palmtop or laptop computers
- Personal digital assistants (PDA)
- Camcorders and cameras
Procurement Notes
Verify the specific suffix 'M31R' against official STMicroelectronics documentation to confirm the exact 3.1 V output voltage rating. Ensure compatibility with the SOT-23-5L package dimensions and thermal requirements for your design. Cross-reference the datasheet version to validate the electrical characteristics and operating temperature range.
Selection Notes
Select this component for battery-powered systems requiring low power consumption and stable voltage regulation. The low quiescent current makes it efficient for portable devices. Verify that the load current does not exceed 100 mA and that the input voltage remains within the specified dropout limits for reliable performance.
Part Context
This part belongs to the LD2981 series of ultra-low drop voltage regulators with inhibit functionality. The series is characterized by very low quiescent current, internal current and thermal limiting, and fast dynamic response to line and load changes. It is designed to work with low ESR ceramic capacitors.
Replacement Considerations
Check for other variants within the LD2981 series offering different fixed output voltages if the 3.1 V specification is flexible. Verify package compatibility and ensure any substitute maintains the same inhibit logic and thermal protection features.
