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Product Detailed Parameters
- Description：IC REG LIN POS ADJ 1A SOT-223-3L
- Series：-
- Mfr：TAEJIN
- Package：Tape & Reel (TR)
- Output Configuration：Positive
- Output Type：Adjustable
- Number of Regulators：1
- Voltage - Input (Max)：12V
- Voltage - Output (Min/Fixed)：1.25V
- Voltage - Output (Max)：12V
- Voltage Dropout (Max)：1.3V @ 1A
- Current - Output：1A
- Current - Quiescent (Iq)：120 µA
- 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-ADJ is a low dropout positive voltage regulator manufactured by TAEJIN. It provides an adjustable output voltage ranging from 1.25V to 13.8V with a maximum continuous output current of 1A. The device features a typical dropout voltage of 1.2V at full load and includes internal current limiting and thermal shutdown protection. It operates within a junction temperature range of -40°C to +125°C and utilizes a SOT-223-3L surface mount package.
Feature Summary
- Adjustable output voltage configuration via external resistors
- Integrated thermal shutdown and current limit protection
- Low dropout performance under full load conditions
Applications
- Active SCSI terminators
- Portable and notebook computer power supplies
- SMPS post regulators
- Motherboard clock supplies
- Battery chargers
Procurement Notes
Verify the manufacturer designation on the component marking, as multiple vendors produce this part number family. Confirm that the specific ordering suffix matches the required tape and reel packaging format for automated assembly processes. Ensure the datasheet revision aligns with your design specifications before finalizing procurement orders.
Selection Notes
Select this component when a single-ended positive voltage rail requires up to 1A of drive capability in a compact surface-mount footprint. The adjustable version allows precise voltage setting using standard resistor networks. Consider the thermal resistance characteristics of the SOT-223-3L package to determine if additional copper area or heat sinking is necessary for high-power dissipation scenarios.
Part Context
This device belongs to the LM1117 series of low dropout linear regulators designed for general-purpose power management applications. The series offers both fixed and adjustable output variants across various packages. The LM1117GS-ADJ specifically denotes the adjustable variant housed in the SOT-223-3L package, providing flexibility for custom voltage requirements while maintaining industry-standard pinouts.
Replacement Considerations
LM1117IDT-ADJ/NOPB
FAQ
What is the minimum output capacitance required for stability?
An output capacitor of 10µF or larger is required for output stability.
How does the dropout voltage vary with load current?
The dropout voltage is specified as 1.2V at a 1A output current and decreases as the output current decreases.
