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Product Detailed Parameters
- Description：IC REG LINEAR POS ADJ SOT23-3L
- 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)：1.2V @ 300mA
- Current - Output：300mA
- 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-236-3, SC-59, SOT-23-3
- Supplier Device Package：SOT-23-3L
- Grade：-
- Qualification：-
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Overview
The LM1117GSF-ADJ is a three-terminal adjustable positive-voltage low dropout regulator manufactured by TAEJIN (HTC Korea). It delivers an output current up to 300mA with a maximum input voltage of 20V. The device features a reference voltage of 1.25V typical, line regulation of 0.1% typical, and load regulation of 0.2% typical. It operates within a junction temperature range of -40°C to +125°C and utilizes a SOT-23-3L surface mount package.
Feature Summary
- Low dropout performance with 1.2V dropout at full load
- Integrated internal current and thermal protection mechanisms
- Adjustable output voltage configuration via external resistors
- Designed for battery-powered applications with low quiescent current
Applications
- Active SCSI terminators
- Portable and notebook computers
- SMPS post regulators
- Motherboard clock supplies
- Battery chargers
Procurement Notes
Verify the manufacturer designation as HTC Korea or TAEJIN when sourcing this component. Confirm the specific package type is SOT-23-3L and that the suffix ADJ indicates the adjustable version. Ensure the datasheet revision matches the required electrical characteristics for your design constraints.
Selection Notes
Select this regulator for designs requiring a compact SOT-23 footprint with moderate current capabilities. Consider the thermal resistance limits of the SOT-23 package when calculating power dissipation. Verify that the application circuit includes the necessary output capacitance to maintain stability under varying load conditions.
Part Context
This component belongs to the LM1117 series of low dropout linear regulators. While other variants in the family may offer higher current ratings or different packages, the LM1117GSF specifically targets space-constrained portable electronics. It provides a cost-effective solution for stepping down voltages efficiently in mobile devices.
Replacement Considerations
LM1117GSF-ADJ
FAQ
What is the minimum output capacitance required for stability?
A capacitor of 10µF or larger is needed at the output to ensure stability.
How does the dropout voltage behave with load current?
The dropout voltage is 1.2V at a full load of 300mA and decreases as the output current decreases.
