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Product Detailed Parameters
- Description：IC REG LINEAR 1.8V 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)：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-252-3, DPAK (2 Leads + Tab), SC-63
- Supplier Device Package：TO-252-3
- Grade：-
- Qualification：-
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Overview
The LM1117RS-1.8 is a fixed-output low dropout voltage regulator manufactured by HTC, designed for 1A continuous output current. It provides a stable 1.8V output with a maximum dropout voltage of 1.3V at full load. The device operates within an input voltage range up to 20V and supports junction temperatures from -40°C to +125°C. It utilizes the TO-252 (DPAK) surface-mount package and includes internal thermal shutdown and current limiting protection.
Feature Summary
- Delivers up to 1.0A of continuous output current
- Features very low dropout voltage performance
- Includes built-in internal current and thermal protection
- Offers high line and load regulation stability
Applications
- Active SCSI Terminators
- Portable and notebook computers
- SMPS post regulators
- Motherboard clock supplies
- Disk drives and battery chargers
Procurement Notes
Verify that the component originates from HTC or authorized distributors. Confirm the specific 'RS' suffix indicates the TO-252 package variant. Ensure the marking matches 'LM1117C 1.8'. Check datasheet revisions for any updates to electrical characteristics or thermal resistance values before finalizing procurement specifications.
Selection Notes
Select this part when a fixed 1.8V rail is required with up to 1A capacity. Ensure the input voltage remains below the 20V absolute maximum rating. Verify that the application environment allows for adequate heat dissipation, as power dissipation limits may restrict the usable output current in smaller packages without external cooling.
Part Context
This component belongs to the LM1117 series of positive LDO regulators. The 'RS' designation specifically identifies the TO-252 surface-mount package variant. Other variants include SOT-223 and SOT-89 packages. The series is widely used in portable electronics due to its efficiency and robust protection features.
Replacement Considerations
Compatible substitutes include LM1117S-1.8 (SOT-223) and LM1117F-1.8 (SOT-89). Cross-manufacturer equivalents such as the TI LM1117DTX-1.8 are functionally similar but require verification of pinout compatibility and thermal performance differences.
