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Product Detailed Parameters
- Description：IC REG LINEAR 1.8V 800MA TO220-3
- Series：-
- Mfr：National Semiconductor
- Package：Bulk
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：15V
- Voltage - Output (Min/Fixed)：1.8V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：1.3V @ 800mA
- Current - Output：800mA
- Current - Quiescent (Iq)：10 mA
- Current - Supply (Max)：-
- PSRR：-
- Control Features：Current Limit
- Protection Features：Over Current, Over Temperature
- Operating Temperature：0°C ~ 125°C (TJ)
- Mounting Type：Through Hole
- Package / Case：TO-220-3
- Supplier Device Package：TO-220-3
- Grade：-
- Qualification：-
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Overview
The LM1117T-1.8 is a fixed positive low-dropout linear regulator manufactured by National Semiconductor, now part of Texas Instruments. It provides a fixed output voltage of 1.8V with a maximum output current capability of 800mA. The device features a typical dropout voltage of 1.2V at full load and operates within an input voltage range of 3.9V to 10V. It is housed in a TO-252 (DPAK) surface-mount package with three terminals. The unit includes internal thermal overload protection and current limiting.
Feature Summary
- Fixed 1.8V output voltage for stable power supply applications
- Low dropout performance allowing operation with minimal input-output differential
- Integrated thermal shutdown and current limiting for circuit protection
Applications
- Battery-powered systems requiring efficient voltage regulation
- Post-regulation for switching power supplies
- Embedded logic power rails
Procurement Notes
Verify the manufacturer origin as National Semiconductor or Texas Instruments when sourcing. Confirm the package type is TO-252 and the output voltage is strictly 1.8V. Ensure the component meets required safety standards and check for lead-free compliance if necessary for your assembly process.
Selection Notes
Select this component when a fixed 1.8V rail is needed with up to 800mA capacity. It is suitable for replacing older linear regulators where lower dropout voltage improves efficiency. Ensure the input voltage remains within the specified maximum limit to prevent damage.
Part Context
This part belongs to the LM1117 family of low-dropout linear regulators. The 'T' suffix indicates the TO-252 surface-mount package, while '-1.8' specifies the fixed 1.8V output variant. The family is known for its robustness and ease of use in various power management designs.
Replacement Considerations
Compatible substitutes include the LM1117DTX-1.8 and LM1117DT-1.8 from other manufacturers like Rochester Electronics, provided they maintain the same 1.8V output and TO-252 package dimensions.
