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Product Detailed Parameters
- Description：IC REG LINEAR 3.3V 100MA 8-SOIC
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR)
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：18V
- Voltage - Output (Min/Fixed)：3.3V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：0.5V @ 100mA
- Current - Output：100mA
- Current - Quiescent (Iq)：1 mA
- Current - Supply (Max)：3 mA
- PSRR：80dB ~ 60dB (120Hz ~ 10kHz)
- Control Features：Enable
- Protection Features：Over Current, Over Temperature
- Operating Temperature：-40°C ~ 125°C
- Mounting Type：Surface Mount
- Package / Case：8-SOIC (0.154", 3.90mm Width)
- Supplier Device Package：8-SOIC
- Grade：-
- Qualification：-
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Overview
The LE33ABD-TR is a positive fixed linear voltage regulator from the STMicroelectronics L78L and LE33 series, housed in an 8-pin SO (Small Outline) surface-mount package. It provides a stable 3.3V output with a maximum continuous current of 100mA. The device features a low dropout characteristic and includes internal thermal overload protection and short-circuit current limiting for robust operation. It operates within an input voltage range up to 24V and supports junction temperatures up to 125°C.
Feature Summary
- Fixed 3.3V output voltage regulation
- Low dropout linear regulation capability
- Integrated thermal overload and short-circuit protection
Applications
- Portable battery-powered equipment
- Embedded control systems
- General-purpose power supply stages
Procurement Notes
Verify the exact suffix against the manufacturer's official datasheet to confirm pinout compatibility and electrical tolerances. Ensure the procurement channel provides original components with traceable documentation. Cross-reference the part number with the specific revision level required for your design to avoid functional discrepancies in regulatory compliance or performance specifications.
Selection Notes
Select this component when a compact surface-mount solution is required for low-current 3.3V regulation. The 8-pin SO package offers space efficiency compared to traditional through-hole options. Consider the thermal dissipation requirements of the PCB layout due to the small form factor. Verify that the input voltage does not exceed the maximum rating to ensure reliable long-term operation under varying load conditions.
Part Context
This part belongs to the STMicroelectronics LE33 series of very low drop voltage regulators with inhibit functionality. The series is designed for applications requiring efficient power management in portable devices. The LE33ABD-TR variant specifically utilizes tape-and-reel packaging for automated assembly processes, distinguishing it from bulk or tube-packaged equivalents in the same family.
Replacement Considerations
Compatible substitutes include the LE33CD-TR and LE33A variants from STMicroelectronics, provided pinout and electrical characteristics match the design requirements. Verify package dimensions and thermal properties before substitution.
