規格
| 屬性 | 價值 |
| Package | Bulk,Tube |
| ProductStatus | Active |
| OutputConfiguration | Positive |
| OutputType | Adjustable |
| NumberofRegulators | 1 |
| Voltage-Input(Max) | 40V |
| Voltage-Output(Min/Fixed) | 1.2V |
| Voltage-Output(Max) | 37V |
| Current-Output | 1.5A |
| Current-Quiescent(Iq) | 10 mA |
| PSRR | 80dB ~ 65dB (120Hz) |
| ProtectionFeatures | Over Current, Over Temperature, Short Circuit |
| OperatingTemperature | -40°C ~ 125°C |
| MountingType | Through Hole |
| Package/Case | TO-220-3 |
概述
Description
The LM317BTG is a popular adjustable voltage regulator used in electronics to maintain a stable output voltage. It operates within a voltage range of 1.25V to 37V and can deliver up to 1.5A of load current. The device is known for its versatility and ease of use, requiring only two external resistors to set the output voltage. It features internal current limiting, thermal overload protection, and safe area compensation, making it robust and reliable for various applications.
The LM317BTG is commonly used in power supply circuits, battery chargers, and adjustable power supplies. Its TO-220 package allows for effective heat dissipation, which is crucial for maintaining performance. The device's ability to provide a constant voltage output in varying input conditions makes it ideal for applications where precise voltage regulation is necessary.
Overall, the LM317BTG is a widely used component due to its simplicity, efficiency, and reliability in delivering adjustable voltage regulation solutions in both hobbyist and professional electronic projects.
The LM317BTG is commonly used in power supply circuits, battery chargers, and adjustable power supplies. Its TO-220 package allows for effective heat dissipation, which is crucial for maintaining performance. The device's ability to provide a constant voltage output in varying input conditions makes it ideal for applications where precise voltage regulation is necessary.
Overall, the LM317BTG is a widely used component due to its simplicity, efficiency, and reliability in delivering adjustable voltage regulation solutions in both hobbyist and professional electronic projects.
Equivalent
The LM317BTG is a voltage regulator IC, and its equivalents include the LM317 series from other manufacturers such as LM317T LM317ATand LM317K. Other compatible alternatives are the L78xx adjustable series and the LT1086. These alternatives typically have similar voltage regulation capabilities and pin configurations, allowing them to be used interchangeably in most applications. Make sure to check the specific requirements of your application to ensure compatibility.
Features
The LM317BTG is a versatile, adjustable voltage regulator with a few key features:
1. Output Voltage Range: It allows for an adjustable output voltage from 1.25V to 37V, making it highly flexible for various applications.
2. Output Current: Capable of providing over 1.5A of output current, suitable for medium-power applications.
3. Line Regulation: It offers a high level of line regulation, typically maintaining ±0.01%/V, which ensures stable output despite input voltage variations.
4. Load Regulation: Exhibits load regulation of 0.1%, ensuring consistent performance under varying load conditions.
5. Thermal Overload Protection: It includes built-in thermal overload protection to prevent damage from overheating.
6. Current Limiting: Features current limiting to protect against excessive currents that could harm the circuit.
7. Safe Operating Area Protection: Designed to prevent the device from being damaged under various operating conditions.
8. Dropout Voltage: Has a dropout voltage of approximately 3V.
These features make the LM317BTG suitable for use in a wide range of applications, including power supplies and battery chargers.
1. Output Voltage Range: It allows for an adjustable output voltage from 1.25V to 37V, making it highly flexible for various applications.
2. Output Current: Capable of providing over 1.5A of output current, suitable for medium-power applications.
3. Line Regulation: It offers a high level of line regulation, typically maintaining ±0.01%/V, which ensures stable output despite input voltage variations.
4. Load Regulation: Exhibits load regulation of 0.1%, ensuring consistent performance under varying load conditions.
5. Thermal Overload Protection: It includes built-in thermal overload protection to prevent damage from overheating.
6. Current Limiting: Features current limiting to protect against excessive currents that could harm the circuit.
7. Safe Operating Area Protection: Designed to prevent the device from being damaged under various operating conditions.
8. Dropout Voltage: Has a dropout voltage of approximately 3V.
These features make the LM317BTG suitable for use in a wide range of applications, including power supplies and battery chargers.
Pinout
The LM317BTG is a three-terminal adjustable voltage regulator. It is designed to provide output voltages ranging from 1.25V to 37V with a current output capability of up to 1.5A. The device typically comes in a TO-220 package and has three pins:
1. Input (Vin): The pin where the unregulated input voltage is applied. It should be at least 3V higher than the desired output voltage for proper regulation.
2. Output (Vout): This pin provides the regulated output voltage. The voltage is adjustable using a pair of external resistors connected to the Adjust pin.
3. Adjust (Adj): This pin is used to set the output voltage. By connecting a resistor divider between the output and ground, the output voltage can be adjusted according to the formula: Vout = 1.25V * (1 + R2/R1) + Iadj * R2, where Iadj is the adjust pin current, typically around 50µA and R1 and R2 are the resistor values.
The LM317BTG is commonly used in applications requiring a simple and flexible voltage regulation solution, such as power supplies and battery chargers.
1. Input (Vin): The pin where the unregulated input voltage is applied. It should be at least 3V higher than the desired output voltage for proper regulation.
2. Output (Vout): This pin provides the regulated output voltage. The voltage is adjustable using a pair of external resistors connected to the Adjust pin.
3. Adjust (Adj): This pin is used to set the output voltage. By connecting a resistor divider between the output and ground, the output voltage can be adjusted according to the formula: Vout = 1.25V * (1 + R2/R1) + Iadj * R2, where Iadj is the adjust pin current, typically around 50µA and R1 and R2 are the resistor values.
The LM317BTG is commonly used in applications requiring a simple and flexible voltage regulation solution, such as power supplies and battery chargers.
Manufacturer
The LM317BTG is a voltage regulator manufactured by ON Semiconductor. ON Semiconductor, now known as onsemi, is a leading global supplier of semiconductor-based solutions. The company focuses on delivering high-performance, energy-efficient solutions for a range of applications including automotive, industrial, cloud power, and Internet of Things (IoT). Onsemi is known for its comprehensive portfolio that includes power management, analog, sensors, logic, timing, connectivity, discrete, SoC, and custom devices. The company is dedicated to innovation and sustainability, striving to provide solutions that contribute to reducing energy consumption and improving efficiency across various industries.
Application
The LM317BTG is a versatile voltage regulator used in various applications. It is commonly employed in power supply circuits to provide a stable output voltage from a varying input voltage. This makes it suitable for battery chargers, adjustable power supplies, and voltage regulation in embedded systems. It is also used in current regulation for driving LEDs or charging batteries. The LM317BTG is often found in consumer electronics, laboratory equipment, and DIY projects where precise voltage control is essential. Its ability to output a wide range of voltages makes it useful in prototyping and circuit development.
Package
The LM317BTG is typically available in a TO-220 package. This is a standard package used for voltage regulators, featuring three pins and a metal tab for heat dissipation.
