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Product Detailed Parameters
- Description：IC REG LINEAR 1.2V 1A SOT-223-3L
- Series：-
- Mfr：TAEJIN
- Package：Tape & Reel (TR)
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：20V
- Voltage - Output (Min/Fixed)：1.2V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：1.3V @ 1A
- Current - Output：1A
- Current - Quiescent (Iq)：10 mA
- Current - Supply (Max)：-
- PSRR：75dB (120Hz)
- Control Features：-
- Protection Features：Over Current, Over Temperature
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：TO-261-4, TO-261AA
- Supplier Device Package：SOT-223-3L
- Grade：-
- Qualification：-
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Overview
The LM1117GS-1.2 is a fixed-output positive low-dropout linear regulator manufactured by TAEJIN, delivering up to 1A of continuous output current. It provides a precise 1.2V output voltage with a maximum dropout voltage of 1.3V at full load. The device features internal current limiting and thermal shutdown protection for system reliability. Designed for surface-mount applications, it utilizes the SOT-223-3L package and operates within a junction temperature range of -40°C to +125°C.
Feature Summary
- Provides stable 1.2V fixed output voltage with high line and load regulation accuracy
- Delivers up to 1A continuous output current with low dropout voltage characteristics
- Includes built-in overcurrent protection and thermal shutdown circuitry
- Designed for surface-mount integration using the compact SOT-223-3L package
Applications
- Active SCSI terminators
- Portable and notebook computer power supplies
- SMPS post-regulators
- Motherboard clock supply circuits
- Battery charger systems
Procurement Notes
Verify the manufacturer marking on the component body matches TAEJIN specifications. Confirm the part number suffix corresponds to the 1.2V fixed output variant. Ensure the package type is SOT-223-3L. Check datasheet revisions for any updates to electrical parameters or pin configurations before finalizing procurement orders.
Selection Notes
Select this regulator when a stable 1.2V rail is required for digital logic or peripheral interfaces. Ensure the input voltage remains below the 20V absolute maximum rating. Verify that the output capacitor meets the minimum capacitance requirement for stability. Consider thermal dissipation requirements based on the voltage differential and load current in the specific application environment.
Part Context
This component belongs to the LM1117 series of low-dropout regulators, widely used in portable electronics and embedded systems. The GS suffix indicates the specific surface-mount packaging configuration. It serves as a cost-effective solution for converting higher voltage rails to lower logic levels while maintaining low noise performance suitable for sensitive analog and digital circuits.
Replacement Considerations
Compatible substitutes include LM1117GS-ADJ for adjustable voltage applications and other variants within the LM1117 family such as LM1117GS-1.5 or LM1117GS-1.8 for different fixed voltage requirements. Cross-manufacturer equivalents like AMS1117 may be considered if pin compatibility and electrical ratings are verified.
