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Product Detailed Parameters
- Description：IC REG LINEAR 5V 100MA SOT23-5
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：16V
- Voltage - Output (Min/Fixed)：5V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：0.375V @ 100mA
- Current - Output：100mA
- Current - Quiescent (Iq)：150 µA
- Current - Supply (Max)：2.6 mA
- PSRR：63dB (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 LD2981ABM50TR is a fixed-output low-dropout linear voltage regulator manufactured by STMicroelectronics. It provides a precise 5.0 V output with a maximum load current of 100 mA. The device features an ultra-low quiescent current of 80 µA in active mode and less than 1 µA in shutdown mode when the inhibit pin is activated. It operates within an input voltage range up to 16 V and maintains stability using low ESR ceramic capacitors. The component is housed in a surface-mount SOT-23-5L package, ensuring compact integration for portable electronics.
Feature Summary
- Ultra-low dropout voltage performance ensures efficient power regulation under minimal input-output differentials.
- Logic-controlled electronic shutdown via TTL-compatible inhibit pin enables effective standby power management.
- Internal protection mechanisms include thermal limiting and current limiting to safeguard against overload conditions.
Applications
- Cellular phone power systems
- Palmtop and laptop computer regulators
- Personal digital assistant (PDA) circuits
- Camcorder and camera power supplies
Procurement Notes
Verify the specific suffix 'ABM' confirms the SOT-23-5L package and ±0.75% output voltage tolerance. Confirm the '50' designation corresponds to the fixed 5.0 V output level. Ensure compatibility with low ESR ceramic output capacitors as required for stability. Check RoHS compliance status for environmental regulations.
Selection Notes
Select this component for applications requiring low noise and high efficiency in battery-powered devices. The ±0.75% tolerance offers higher precision compared to standard versions. Consider the SOT-23-5L package for space-constrained designs. Evaluate the need for the inhibit function to manage system standby currents effectively.
Part Context
This part belongs to the LD2981 family of ultra-low drop voltage regulators designed for low noise and low power consumption. The series supports various fixed output voltages including 2.5 V, 3.0 V, 3.3 V, and 5.0 V. It is engineered for portable consumer electronics where power efficiency and small form factors are critical design constraints.
Replacement Considerations
Public confirmed substitute part numbers are not available in the provided documentation. Verify cross-reference availability through official manufacturer channels before substitution.
