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Product Detailed Parameters
- Description：IC REG LINEAR 5V 1A TO252-3
- 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)：5V
- 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-252-3, DPAK (2 Leads + Tab), SC-63
- Supplier Device Package：TO-252-3
- Grade：-
- Qualification：-
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Overview
The LM1117RS-5.0 is a low dropout positive-voltage regulator manufactured by HTC Korea, designed to deliver up to 1.0A of output current. It provides a fixed 5.0V output and operates within an input voltage range of up to 20V. The device features a typical line regulation of 0.1% and load regulation of 0.2%. Dropout voltage is specified at 1.2V when delivering 1.0A. It includes internal current limiting and thermal protection mechanisms. The component is housed in a TO-252 (DPAK) surface-mount package with three terminals.
Feature Summary
- Delivers continuous output current up to 1.0A across the full operating temperature range
- Features very low dropout voltage performance that decreases as output current reduces
- Includes built-in internal current limit and thermal shutdown protection for circuit safety
- Offers high line and load regulation accuracy for stable power supply applications
Applications
- Active SCSI terminators
- Portable and notebook computers
- High efficiency linear regulators
- SMPS post regulators
- Motherboard clock supplies
Procurement Notes
Verify the manufacturer origin, as HTC Korea produces this specific variant distinct from Texas Instruments equivalents. Confirm the package type matches the required PCB footprint, specifically the TO-252 configuration. Ensure the ordering suffix corresponds to the correct fixed 5.0V output version. Check moisture sensitivity level requirements during storage and handling procedures.
Selection Notes
Select this component when a fixed 5.0V rail is required with up to 1A capacity. Consider the TO-252 package for its thermal dissipation capabilities compared to smaller packages. Evaluate the maximum input voltage against the system supply to ensure it remains below the 20V absolute maximum rating. Account for thermal resistance limits if ambient temperatures are high or copper area is restricted.
Part Context
This part belongs to the LM1117 series of low dropout linear regulators produced by HTC Korea. The series includes adjustable versions and various fixed output voltages such as 1.2V, 1.5V, 1.8V, 2.5V, and 3.3V. The RS designation indicates the TO-252 surface-mount package option, distinguishing it from SOT-223 and SOT-89 variants within the same product family.
Replacement Considerations
LM1117S-5.0 (SOT-223 package)
FAQ
What is the maximum input voltage allowed for the LM1117RS-5.0?
The absolute maximum input voltage rating is 20V.
Does the LM1117RS-5.0 require an external heat sink?
A heat sink may be required depending on the power dissipation and ambient temperature. If the calculated junction-to-ambient thermal resistance falls near or below 105°C/W for the TO-252 package, proper copper plane area or a heat sink is necessary.
