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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 LD2981CM33TR is a fixed-output low-dropout (LDO) linear voltage regulator manufactured by STMicroelectronics. It provides a fixed output voltage of 3.3 V with a maximum continuous output current of 100 mA. The device supports a maximum input voltage of 16.0 V and operates within an extended temperature range of -40°C to +125°C. Key electrical parameters include a typical quiescent current of 80 µA in active mode, a maximum supply current of 2.6 mA, and a dropout voltage of 375 mV at full load. The component utilizes a SOT-23-5 surface-mount package.
Feature Summary
- Features logic-controlled electronic shutdown via the inhibit pin for power management
- Designed for stable operation using low ESR ceramic output capacitors
- Includes internal protection against overcurrent and thermal overload conditions
Applications
- Battery-powered portable electronic systems
- Cellular phone power regulation
- Personal digital assistant (PDA) circuits
- Camcorder and camera power supplies
Procurement Notes
Verify the specific suffix 'M' indicates the SOT-23-5 package configuration when sourcing replacements. Confirm that the 'C' grade meets the required operating temperature specifications for your application environment. Ensure compatibility with standard surface-mount assembly processes for the specified footprint.
Selection Notes
Select this component when a fixed 3.3 V rail is required with minimal board space due to the compact SOT-23-5 package. It is suitable for applications prioritizing low static current consumption during active operation. Consider the 100 mA current limit when designing for peak load requirements.
Part Context
This part belongs to the LD2981 family of ultra-low drop voltage regulators from STMicroelectronics. The series is characterized by low noise and fast dynamic response to line and load changes. Variants within the family offer different fixed output voltages and package options, such as SOT-89, while maintaining similar protection features and performance characteristics.
Replacement Considerations
Compatible substitutes include other LD2981 variants with identical pinouts and functionality, such as LD2981ABM33TR or LD2981CU33TR, provided the package type and output voltage tolerance meet the design requirements.
