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Product Detailed Parameters
- Description：IC REG LINEAR 3.3V 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)：3.3V
- 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 LD2981ABM33TR is a fixed-output low-dropout (LDO) linear voltage regulator manufactured by STMicroelectronics. It provides a stable 3.3 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, making it suitable for battery-powered applications. It operates within an input voltage range of 2.5 V to 16 V and maintains high accuracy with ±0.75% output voltage tolerance. Integrated protections include thermal limiting and current limiting. The component is housed in a compact SOT-23-5 surface-mount package.
Feature Summary
- Logic-controlled electronic shutdown via inhibit pin for power management
- Ultra-low dropout voltage performance for efficient power usage
- Designed for stability with low ESR ceramic output capacitors
Applications
- Battery-powered portable electronics
- Personal digital assistants (PDA)
- Camcorders and cameras
Procurement Notes
Verify the specific suffix 'ABM' to confirm the SOT-23-5 package, 3.3 V fixed output, and A-grade ±0.75% accuracy. Ensure compatibility with low ESR ceramic capacitors as required for stability. Confirm RoHS compliance status through official manufacturer documentation prior to integration.
Selection Notes
Select this component when a fixed 3.3 V rail is required with minimal static power consumption. The logic-controlled shutdown feature allows system-level power savings. Verify that the application environment stays within the -40 °C to +125 °C operating temperature range and that input voltage does not exceed 16 V.
Part Context
This part belongs to the LD2981 series of ultra-low drop voltage regulators from STMicroelectronics. The series is characterized by low noise and fast dynamic response. Variants differ by output voltage, package type (SOT-23-5 or SOT-89), and accuracy grade. This specific model utilizes the SOT-23-5 form factor.
Replacement Considerations
Cross-reference with other LD2981 variants such as LD2981CM33TR for package differences or LD2981ABU33TR for SOT-89 packaging. Verify pinout compatibility and electrical specifications before substitution.
