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Product Detailed Parameters
- Description：IC REG LINEAR 2.5V 800MA SOT-223
- Series：-
- Mfr：National Semiconductor
- Package：Bulk
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：15V
- Voltage - Output (Min/Fixed)：2.5V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：1.2V @ 800mA
- Current - Output：800mA
- Current - Quiescent (Iq)：5 mA
- Current - Supply (Max)：10 mA
- PSRR：75dB (120Hz)
- Control Features：-
- Protection Features：Over Current, Over Temperature
- Operating Temperature：0°C ~ 125°C
- Mounting Type：Surface Mount
- Package / Case：TO-261-4, TO-261AA
- Supplier Device Package：SOT-223
- Grade：-
- Qualification：-
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Overview
The LM1117MP-2.5 is a fixed positive low-dropout linear regulator manufactured by National Semiconductor, now part of Texas Instruments. It provides a stable 2.5V output with a maximum load current capability of 800mA. The device features a typical dropout voltage of 1.3V at full load and operates within an input voltage range of 3.9V to 10V. It includes internal current limiting and thermal shutdown protection for circuit safety.
Feature Summary
- Fixed positive voltage regulation with high accuracy
- Integrated current limiting and thermal shutdown protection
- Low dropout voltage characteristic for efficient power conversion
Applications
- SCSI-2 active termination
- Post regulator for switching DC/DC converters
- Battery charger circuits
- Battery powered instrumentation
Procurement Notes
Verify the manufacturer designation carefully, as National Semiconductor was acquired by Texas Instruments. Ensure the specific suffix matches the required package type and temperature grade. Confirm RoHS compliance status if environmental regulations apply to your assembly process. Cross-reference datasheets from both legacy National and current TI sources for consistency.
Selection Notes
Select this component when a fixed 2.5V rail is required with moderate current demands up to 800mA. Consider the thermal dissipation capabilities of the chosen package, such as SOT-223 or TO-252, based on the expected power loss. Ensure the input voltage remains sufficiently above the output to maintain regulation within the specified dropout limits.
Part Context
This part belongs to the LM1117 series of low-dropout regulators, which are designed to replace standard three-terminal adjustable regulators like the LM317 in many applications due to their lower dropout voltage and simpler fixed-output configurations. The series is widely used in portable electronics and industrial control systems requiring stable, efficient linear regulation.
Replacement Considerations
Compatible substitutes include the LM1117MPX-2.5/NOPB and LM1117DT-2.5/NOPB from Texas Instruments. These variants offer identical electrical specifications and pinouts, ensuring direct replacement without circuit redesign.
