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LM2940S-5.0
+Lista de MateriaisIC REG LIN 5V 1A DDPAK/TO263-3
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FabricanteTexas Instruments
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Peça do Fabricante #LM2940S-5.0
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Pacote TO-263
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Especificações
| Atributo | Valor |
| Package | Tube |
| ProductStatus | Not For New Designs |
| OutputConfiguration | Positive |
| OutputType | Fixed |
| NumberofRegulators | 1 |
| Voltage-Input(Max) | 26V |
| Voltage-Output(Min/Fixed) | 5V |
| VoltageDropout(Max) | 1V @ 1A |
| Current-Output | 1A |
| Current-Quiescent(Iq) | 10 mA |
| Current-Supply(Max) | 15 mA |
| PSRR | 64dB (120Hz) |
| ProtectionFeatures | Over Current, Over Temperature, Reverse Polarity, Short Circuit |
| OperatingTemperature | -40°C ~ 125°C |
| MountingType | Surface Mount |
| Package/Case | TO-263-4, D²Pak (3 Leads + Tab), TO-263AA |
Visão Geral
Description
Key specifications include:
- Input Voltage Range: Typically up to 26V.
- Output Current: Up to 1A.
- Output Voltage: Fixed at 5.0V.
- Quiescent Current: Low, enhancing efficiency.
- Protection Features: Includes current limiting and thermal shutdown to prevent damage under fault conditions.
The LM2940S-5.0 is favored for its reliability and ease of use, with a minimal number of external components needed for operation. Its low dropout level makes it particularly useful in battery-powered applications where maximizing battery life is critical. Its internal circuitry ensures stable operation even with input voltage fluctuations, enhancing its utility in diverse environments.
Equivalent
1. MIC29300-5.0WT by Microchip Technology
2. LD1117S50 by STMicroelectronics
3. KA378R05 by ON Semiconductor
4. NCP1117ST50T3G by ON Semiconductor
5. LP2953-5.0 by Texas Instruments
These alternatives offer similar voltage regulation capabilities but ensure to verify specific electrical characteristics and package compatibility for direct replacements.
Features
1. Low Dropout Voltage: Typically around 0.5V at full load, allowing the device to maintain regulation even with a relatively low input voltage.
2. Output Current: Capable of supplying up to 1A of output current.
3. Stability: Requires only a 22µF electrolytic capacitor on the output for stability across the full range of input voltages and load conditions.
4. Thermal Protection: Includes over-temperature shutdown to prevent damage from excessive heat.
5. Short-circuit Protection: Current limiting to protect against output short circuits.
6. Low Quiescent Current: Typically around 10mA, which helps in applications requiring energy efficiency.
7. Reverse Battery Protection: Designed to protect the regulator from damage if the battery is connected backward.
8. Wide Input Voltage Range: Typically operates with input voltages from 6V to 26V.
These features make the LM2940S-5.0 suitable for a variety of applications including automotive, industrial, and consumer electronics.
Pinout
1. Pin 1 (Input): This is the input pin where the unregulated voltage is applied. It must be higher than the desired output voltage plus the dropout voltage.
2. Pin 2 (Ground): This is the ground pin and serves as the reference point for the input and output voltages.
3. Pin 3 (Output): This is the output pin where the regulated 5.0V is provided.
The LM2940S-5.0 is designed to provide a stable 5.0V output with low dropout voltage and is capable of delivering up to 1A of output current. It features low quiescent current and good line and load regulation, making it suitable for various applications in electronics that require a stable power supply.