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Product Detailed Parameters
- Description：IC REG LINEAR 1.8V 1A SOT89
- 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)：1.8V
- 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-243AA
- Supplier Device Package：SOT-89
- Grade：-
- Qualification：-
Download product information
Overview
The LM1117F-1.8 is a fixed-output low dropout linear regulator manufactured by TAEJIN (HTC Korea). It provides a stable 1.8V output with a maximum continuous current of 1.0A. The device operates within an input voltage range up to 20V and features a typical dropout voltage of 1.2V at full load. Line regulation is typically 0.1%, and load regulation is typically 0.2%. It includes internal current limiting and thermal shutdown protection, ensuring reliable operation across a junction temperature range of -40°C to 125°C.
Feature Summary
- Delivers up to 1.0A of continuous output current for high-power applications
- Maintains stable regulation with very low dropout voltage under full load conditions
- Incorporates built-in internal current limiting and thermal overload protection mechanisms
Applications
- Active SCSI terminators
- Portable and notebook computers
- Battery chargers
- SMPS post regulators
Procurement Notes
Verify the manufacturer marking on the component surface matches the official datasheet specifications. Confirm the package type corresponds to SOT-89-3L as indicated in the ordering information. Ensure the part number suffix aligns with the required 1.8V fixed output variant before finalizing procurement orders.
Selection Notes
Select this component when a fixed 1.8V rail is required with up to 1A capacity. Consider the SOT-89 package for space-constrained designs requiring surface mount assembly. Evaluate thermal dissipation requirements based on the specific ambient temperature and copper plane area available on the PCB layout.
Part Context
This device belongs to the LM1117 series of low dropout voltage regulators produced by HTC Korea. The series offers both adjustable and fixed output versions in multiple packages including SOT-223, TO-252, and SOT-89. The LM1117F-1.8 specifically denotes the fixed 1.8V output variant housed in the SOT-89 surface mount package.
Replacement Considerations
LM1117S-1.8
FAQ
What is the minimum output capacitor value required for stability?
An output capacitor of 10 µF or larger is required for output stability.
Does the LM1117F-1.8 include short circuit protection?
Yes, the device features internal current limiting and thermal protection.
