LM317BT

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LM317BT

IC REG LINEAR POS ADJ 1.5A TO220

  • Nhà sản xuất
  • Ông. Phần #LM317BT
  • Gói TO-220-3
  • Bảng dữ liệu
  • Có sẵn5252

100% gốc & amp; Mới

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Bảo hành 365 ngày

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Thông số kỹ thuật

Package Tube
ProductStatus Obsolete
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

Tổng quan

Description

The LM317BT is a popular adjustable three-terminal voltage regulator designed to provide output voltages ranging from 1.25V to 37V with a maximum output current of 1.5A. It is widely used in electronic circuits for its versatility and ease of use. Key features include thermal regulation, overload protection, and a safe operating area protection, which enhance its reliability under varying load conditions.
This voltage regulator requires only two external resistors to set the output voltage, making it straightforward to implement. The device is housed in a TO-220 package, facilitating easy mounting and heat dissipation. The LM317BT is favored in applications where precise voltage regulation is necessary, such as in power supplies, battery chargers, and embedded systems. Additionally, its ability to regulate a wide range of voltages makes it suitable for both fixed and adjustable power supplies.
Overall, the LM317BT is valued for its robustness, flexibility, and reliable performance in various electronic applications.

Features

The LM317BT is a versatile three-terminal adjustable voltage regulator. Key features include:
1. Adjustable Output Voltage: It provides an output voltage range from 1.25V to 37V, making it suitable for a wide range of applications.
2. Output Current: It can supply more than 1.5A of load current, providing robust performance for demanding applications.
3. Line Regulation: It offers excellent line regulation, typically 0.01%/V, ensuring stable output despite input voltage changes.
4. Load Regulation: It features good load regulation with a typical value of 0.1%, maintaining steady output even with varying load conditions.
5. Thermal Protection: The LM317BT includes built-in thermal overload protection to prevent overheating.
6. Current Limiting: It has internal current limiting, offering protection against overcurrent conditions.
7. Safe Operating Area Protection: Ensures reliable operation by maintaining the device within its safe operating limits.
8. Package: Typically available in a TO-220 package, which is easy to mount and provides efficient heat dissipation.
These features make the LM317BT a popular choice for various applications including power supplies, battery chargers, and adjustable voltage regulators.

Package

The LM317BT is a voltage regulator with an adjustable output. It typically comes in a TO-220 package, which is a standard type of package for power semiconductors that allows for easy heat dissipation and mounting onto heat sinks.

Pinout

The LM317BT is a three-terminal adjustable voltage regulator. It is capable of supplying a constant output voltage that ranges from 1.25V to 37V, with a load current of up to 1.5A. The LM317BT is packaged in a TO-220 package, which is a common type for power transistors and voltage regulators.
Pin Count and Functions:
1. Input (Pin 1): This is where the unregulated input voltage is applied. The input voltage must be higher than the desired output voltage by at least 3V for proper regulation.
2. Output (Pin 2): This pin provides the regulated output voltage. It is connected to the load and is where the regulated voltage is available.
3. Adjust (Pin 3): This pin is used to adjust the output voltage. By connecting a resistor divider between the output and adjust pins, the output voltage can be set to the desired level.
The LM317BT is well-suited for applications requiring adjustable voltage regulation and provides features like thermal overload protection and current limiting for safe operation.

Manufacturer

The LM317BT is a voltage regulator typically manufactured by several companies, including Texas Instruments, ON Semiconductor (now onsemi), and STMicroelectronics, among others. These companies are well-known semiconductor manufacturers that design and produce a wide range of electronic components.
1. Texas Instruments (TI): An American technology company, TI is one of the largest manufacturers of semiconductors globally, providing products for various industries, including automotive, industrial, and consumer electronics.
2. onsemi (formerly ON Semiconductor): A leading supplier of high-performance silicon solutions for energy-efficient electronics, onsemi focuses on automotive, industrial, and communication markets.
3. STMicroelectronics: A Franco-Italian multinational that develops and manufactures a broad portfolio of semiconductor products, serving applications in power management, automotive, and IoT.
All these companies specialize in the design and production of semiconductor devices and play significant roles in the global electronics supply chain.

Application

The LM317BT is a versatile voltage regulator commonly used in applications requiring a stable output voltage. Its application areas include power supplies for electronic devices, battery chargers, adjustable voltage regulators for lab equipment, and voltage regulation in communication devices. It is also used in DIY electronics projects for providing a precise voltage for microcontrollers and sensors, as well as in automotive electronics for stable power supply requirements. Its adjustability and thermal protection features make it suitable for a wide range of uses.

Equivalent

Equivalent products to the LM317BT voltage regulator include:
1. LM317T - General equivalent with similar specifications.
2. L78S12CV - Offers a fixed output with similar characteristics.
3. NTE956 - A generic alternative with comparable performance.
4. L78MXX series - Offers fixed output with close functionality.
5. ON Semiconductor MC7800 Series - Provides fixed voltage options with similar applications.
These equivalents provide similar voltage regulation capabilities, ensuring compatibility in most circuits where the LM317BT is used.

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