仕様
| 属性 | 値 |
| Package / Case | Tape & Reel (TR),Cut Tape (CT) |
| Part Status | Not For New Designs |
| Output Configuration | Positive |
| Output Type | Fixed |
| Number of Regulators | 1 |
| Voltage - Input (Max) | 26V |
| Voltage - Output (Min/Fixed) | 5V |
| Voltage Dropout (Max) | 1V @ 1A |
| Current - Output | 1A |
| Current - Quiescent (Iq) | 10 mA |
| Current - Supply (Max) | 15 mA |
| PSRR | 64dB (120Hz) |
| Protection Features | Over Current, Over Temperature, Reverse Polarity, Short Circuit |
| Operating Temperature | -40°C ~ 125°C |
| Mounting Type | Surface Mount |
概要
Description
The LM2940SX-5.0 is a low dropout voltage regulator integrated circuit designed to provide a stable 5.0V output voltage. It features a low dropout voltage of approximately 0.5V at full load, making it ideal for applications where input and output voltage differentials are minimal. The device can deliver up to 1A of output current with minimal external components, which simplifies design and reduces space requirements.
Key features include excellent line and load regulation, low quiescent current draw, and built-in protections against overcurrent and thermal overload. This makes the LM2940SX-5.0 suitable for battery-powered applications, automotive systems, and any other scenarios requiring efficient voltage regulation. The device is available in a TO-263 surface-mount package, enhancing its suitability for compact designs. Additionally, it supports a wide operating temperature range, ensuring reliable performance in various environmental conditions. The LM2940SX-5.0 is valued for its reliability, efficiency, and ease of use in maintaining a stable voltage supply in electronics applications.
Key features include excellent line and load regulation, low quiescent current draw, and built-in protections against overcurrent and thermal overload. This makes the LM2940SX-5.0 suitable for battery-powered applications, automotive systems, and any other scenarios requiring efficient voltage regulation. The device is available in a TO-263 surface-mount package, enhancing its suitability for compact designs. Additionally, it supports a wide operating temperature range, ensuring reliable performance in various environmental conditions. The LM2940SX-5.0 is valued for its reliability, efficiency, and ease of use in maintaining a stable voltage supply in electronics applications.
Equivalent
The LM2940SX-5.0 is a low-dropout (LDO) voltage regulator. Equivalent products typically have similar output voltage, current capacity, and dropout voltage. Some alternatives include:
1. MIC29302 - A similar LDO with a 5V output.
2. AMS1117-5.0 - Offers 5V output with comparable specs.
3. LT1086-5 - Another 5V LDO regulator.
4. NCP1117ST50T3G - A 5V output regulator with similar features.
Always verify specifications and pin compatibility when choosing equivalents.
1. MIC29302 - A similar LDO with a 5V output.
2. AMS1117-5.0 - Offers 5V output with comparable specs.
3. LT1086-5 - Another 5V LDO regulator.
4. NCP1117ST50T3G - A 5V output regulator with similar features.
Always verify specifications and pin compatibility when choosing equivalents.
Features
The LM2940SX-5.0 is a low dropout regulator (LDO) designed for applications requiring a stable 5.0V output. Key features include:
1. Low Dropout Voltage: Typically around 0.5V at a full load of 1A, allowing for efficient operation close to the output voltage level.
2. Output Current: Capable of delivering up to 1A of output current.
3. Stability: Requires only a 22μF output capacitor for stability, making it easy to design with.
4. Low Quiescent Current: Minimizes power consumption in the absence of a load, enhancing efficiency especially in battery-powered applications.
5. Reverse Battery Protection: Prevents damage if the battery is connected backward.
6. Reverse Transient Protection: Handles transient reverse voltage conditions without harm.
7. Load Dump Protection: Provides resilience against voltage spikes as high as 60V.
8. Wide Input Voltage Range: Operates effectively over a broad input voltage range (up to 26V).
9. Thermal and Short-circuit Protection: Includes integrated safeguards to prevent damage under fault conditions.
These features make the LM2940SX-5.0 suitable for automotive and other portable applications requiring reliable power delivery and protection mechanisms.
1. Low Dropout Voltage: Typically around 0.5V at a full load of 1A, allowing for efficient operation close to the output voltage level.
2. Output Current: Capable of delivering up to 1A of output current.
3. Stability: Requires only a 22μF output capacitor for stability, making it easy to design with.
4. Low Quiescent Current: Minimizes power consumption in the absence of a load, enhancing efficiency especially in battery-powered applications.
5. Reverse Battery Protection: Prevents damage if the battery is connected backward.
6. Reverse Transient Protection: Handles transient reverse voltage conditions without harm.
7. Load Dump Protection: Provides resilience against voltage spikes as high as 60V.
8. Wide Input Voltage Range: Operates effectively over a broad input voltage range (up to 26V).
9. Thermal and Short-circuit Protection: Includes integrated safeguards to prevent damage under fault conditions.
These features make the LM2940SX-5.0 suitable for automotive and other portable applications requiring reliable power delivery and protection mechanisms.
Pinout
The LM2940SX-5.0 is a low dropout voltage regulator from the LM2940 series. It typically comes in a surface-mount package, such as the TO-263 (D²PAK), with a 3-pin configuration. Here’s a brief overview of its pin count and functions:
1. Pin 1 - Input: This is the voltage input pin where the unregulated input voltage is applied. It is the pin through which the regulator receives the power supply that needs to be stepped down.
2. Pin 2 - Ground (GND): This is the ground pin of the regulator and acts as the reference point for the output voltage. It is connected to the ground plane of the circuit.
3. Pin 3 - Output: This pin provides the regulated 5V output. It is where the stable, low dropout output voltage is supplied to the load.
The LM2940SX-5.0 is designed to provide a regulated 5V output with a dropout voltage of approximately 0.5V at 1A, making it suitable for applications requiring efficient voltage regulation close to the input voltage level.
1. Pin 1 - Input: This is the voltage input pin where the unregulated input voltage is applied. It is the pin through which the regulator receives the power supply that needs to be stepped down.
2. Pin 2 - Ground (GND): This is the ground pin of the regulator and acts as the reference point for the output voltage. It is connected to the ground plane of the circuit.
3. Pin 3 - Output: This pin provides the regulated 5V output. It is where the stable, low dropout output voltage is supplied to the load.
The LM2940SX-5.0 is designed to provide a regulated 5V output with a dropout voltage of approximately 0.5V at 1A, making it suitable for applications requiring efficient voltage regulation close to the input voltage level.
Manufacturer
The LM2940SX-5.0 is a low dropout voltage regulator manufactured by Texas Instruments. Texas Instruments, often abbreviated as TI, is an American technology company headquartered in Dallas, Texas. It is one of the largest semiconductor companies in the world and specializes in designing and manufacturing a wide range of semiconductor products, including analog chips, digital signal processors, and microcontroller units. TI's products are used in various applications, such as industrial, automotive, personal electronics, and communications equipment. The company is known for its innovation in electronics and has a strong focus on research and development to advance technology in the semiconductor industry.
Application
The LM2940SX-5.0 is a low-dropout voltage regulator commonly used in various applications. Its primary areas include:
1. Automotive Electronics: Power supply for electronic control units and sensors.
2. Consumer Electronics: Voltage regulation in devices like TVs, audio equipment, and gaming consoles.
3. Telecommunications: Power supply for communication devices and networking equipment.
4. Industrial Equipment: Used in control systems and instrumentation for stable voltage supply.
5. Computing: Power management in computers and peripheral devices.
6. Embedded Systems: Provides stable power in microcontroller-based projects and IoT devices.
Its low dropout voltage and high output accuracy make it ideal for battery-powered and low-voltage applications.
1. Automotive Electronics: Power supply for electronic control units and sensors.
2. Consumer Electronics: Voltage regulation in devices like TVs, audio equipment, and gaming consoles.
3. Telecommunications: Power supply for communication devices and networking equipment.
4. Industrial Equipment: Used in control systems and instrumentation for stable voltage supply.
5. Computing: Power management in computers and peripheral devices.
6. Embedded Systems: Provides stable power in microcontroller-based projects and IoT devices.
Its low dropout voltage and high output accuracy make it ideal for battery-powered and low-voltage applications.
Package
The LM2940SX-5.0 is a low dropout (LDO) voltage regulator typically available in a surface-mount SOT-223 package. This package is designed for efficient thermal performance and space-saving on circuit boards. It provides a fixed output voltage of 5.0V, making it suitable for various electronic applications requiring stable voltage regulation.
