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Product Detailed Parameters
- Description：IC REG LINEAR 5V 300MA SOT23-3L
- Series：-
- Mfr：TAEJIN
- Package：Tape & Reel (TR)
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：15V
- Voltage - Output (Min/Fixed)：5V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：1.2V @ 300mA
- Current - Output：300mA
- 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-236-3, SC-59, SOT-23-3
- Supplier Device Package：SOT-23-3L
- Grade：-
- Qualification：-
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Overview
The LM1117GSF-5.0 is a positive-voltage low dropout regulator manufactured by TAEJIN (HTC Korea). It provides a fixed 5.0V output with a maximum continuous current of 300mA. The device operates within an input voltage range up to 20V and maintains stability with a minimum load capacitor of 10µF. Key electrical parameters include a typical line regulation of 0.1% and load regulation of 0.2%. The component features a dropout voltage of 1.2V at full load and supports an operating junction temperature range from -40°C to +125°C.
Feature Summary
- Provides fixed 5.0V output or adjustable operation via external resistors
- Integrates internal current limiting and thermal shutdown protection
- Utilizes compact SOT-23 surface mount package for space-constrained designs
- Delivers high efficiency linear regulation with low quiescent current
Applications
- Active SCSI terminators
- Portable and notebook computer power supplies
- SMPS post regulators
- Motherboard clock supplies
- Battery chargers
Procurement Notes
Verify the manufacturer designation as TAEJIN (HTC Korea) rather than Texas Instruments, as part numbers may be shared across different foundries. Confirm the specific suffix 'GSF' corresponds to the SOT-23-3L package and 5.0V fixed output variant. Ensure compliance with Moisture Sensitivity Level 3 requirements during storage and handling.
Selection Notes
Select this component when a compact footprint is required for 300mA applications, as it differs from higher-current 800mA variants. Verify that the application circuit includes a minimum 10µF output capacitor to ensure stability. Consider thermal dissipation limits in the SOT-23 package if the voltage differential between input and output is significant under heavy loads.
Part Context
This regulator belongs to the LM1117 series of low-dropout linear voltage regulators. While the base model name is common across manufacturers like Texas Instruments and HTC Korea, the specific 'GSF' suffix and TAEJIN branding indicate a distinct manufacturing source and package configuration. It serves as a low-power alternative to standard three-terminal regulators.
Replacement Considerations
LM1117GSF-ADJ
FAQ
What is the minimum output capacitance required for stability?
A minimum output capacitor of 10µF is required to ensure stability and improve transient response.
How does the dropout voltage behave at full load?
The dropout voltage is specified as 1.2V when the output current is at its maximum rating of 300mA.
