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Product Detailed Parameters
- Description：IC REG LINEAR 500MA TO220-5
- Series：-
- Mfr：National Semiconductor
- Package：Tube
- Output Configuration：-
- Output Type：-
- Number of Regulators：1
- Voltage - Input (Max)：-
- Voltage - Output (Min/Fixed)：-
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：-
- Current - Output：500mA
- Current - Quiescent (Iq)：-
- Current - Supply (Max)：-
- PSRR：-
- Control Features：-
- Protection Features：-
- Operating Temperature：-40°C ~ 125°C
- Mounting Type：Through Hole
- Package / Case：TO-220-5
- Supplier Device Package：TO-220-5
- Grade：-
- Qualification：-
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Overview
The LM2927T is a low dropout voltage regulator manufactured by National Semiconductor, housed in a five-pin TO-220 package. It provides a nominal output voltage of 5V with a maximum load current capability of 750mA. The device operates within an extended junction temperature range from -40°C to 125°C. Key electrical characteristics include a typical dropout voltage of 0.6V at full load and a line regulation of 0.08%. The component integrates delayed reset functionality for power supply sequencing applications.
Feature Summary
- Integrated delayed reset circuitry for controlled power-up sequencing
- Low dropout operation ensuring efficient voltage regulation under varying input conditions
- Robust thermal performance supporting high ambient temperatures up to 125°C
Applications
- Power supply sequencing systems requiring delayed reset signals
- Battery-powered equipment utilizing low dropout regulators
- Industrial control systems operating in high-temperature environments
Procurement Notes
Verify the manufacturer origin as National Semiconductor or Texas Instruments, noting that NSC was acquired by TI. Confirm the specific suffix 'T' corresponds to the standard TO-220-5 package variant. Ensure the datasheet version matches the required operational specifications, particularly regarding the delayed reset timing parameters and thermal resistance values defined in the official documentation.
Selection Notes
Select this component when a fixed 5V output is required with high current capacity up to 750mA. The TO-220-5 package is suitable for applications needing effective heat dissipation without additional heatsinks in moderate loads. Consider the delayed reset feature if system startup sequencing is critical. Verify that the input voltage remains within the specified limits to maintain regulation and prevent thermal overload during continuous operation.
Part Context
The LM2927T belongs to the LM2926 series of low dropout regulators designed for demanding linear regulation tasks. This series emphasizes stability and efficiency in battery-operated devices. The TO-220-5 package distinguishes it from smaller surface-mount variants, offering higher thermal handling capabilities. It serves as a robust solution for industrial and commercial electronics requiring reliable voltage stabilization.
Replacement Considerations
Cross-reference with LM2926 series components for similar low dropout characteristics. Verify pin compatibility and thermal requirements before substituting with other 5V regulators. Ensure any alternative part supports the same delayed reset functionality if required by the design.
