Overview
The LM2576-5.0BU TR is a high-efficiency, step-down (buck) switching voltage regulator produced by Microchip Technology. This component is designed to provide a fixed 5V output voltage and is capable of delivering up to 3A of output current. It is part of the LM2576 series, which is widely recognized for its simplicity, reliability, and efficiency in power management applications. The LM2576-5.0BU TR is particularly suitable for applications requiring a stable and efficient power supply with minimal external components.
Key Specifications
| Parameter | Value | Unit | Notes |
|---|---|---|---|
| Output Voltage | 5 | V | Fixed |
| Output Current | 3 | A | Maximum |
| Input Voltage Range | 4 to 40 | V | |
| Switching Frequency | 52 | kHz | Typical |
| Efficiency | 75 to 88 | % | Depending on conditions |
| Operating Temperature Range | -40 to 125 | °C | |
| Package | TO-263 | SMD |
Key Features
- High efficiency step-down voltage regulation.
- Requires minimal external components, simplifying design and reducing cost.
- Built-in frequency compensation and fixed frequency oscillator.
- Features thermal shutdown and current limit protection.
- Available in a compact TO-263 package, suitable for space-constrained applications.
Applications
The LM2576-5.0BU TR is versatile and can be used in a variety of applications. It is ideal for powering devices in industrial control systems, automotive electronics, and consumer electronics. Its ability to efficiently convert higher input voltages to a stable 5V output makes it particularly useful in battery-powered devices, portable instruments, and as a replacement for less efficient linear regulators in existing designs.
Q & A
What is the maximum input voltage for the LM2576-5.0BU TR?
The maximum input voltage is 40V.
Can the LM2576-5.0BU TR be used in automotive applications?
Yes, it is suitable for automotive electronics, providing stable voltage for various in-car devices.
What is the typical efficiency of the LM2576-5.0BU TR?
Efficiency typically ranges from 75% to 88%, depending on the operating conditions.
Does the LM2576-5.0BU TR require external cooling?
In many applications, it does not require a heatsink due to its high efficiency, but thermal management should be considered based on the specific application and environment.
What is the purpose of the thermal shutdown feature?
Thermal shutdown protects the device from overheating by shutting it down temporarily if the temperature exceeds a safe threshold.
Is the output voltage adjustable?
No, the LM2576-5.0BU TR provides a fixed 5V output.
What type of package does the LM2576-5.0BU TR come in?
It comes in a TO-263 package, which is a surface-mount type.
Can this device handle input voltage fluctuations?
Yes, it can handle input voltages from 4V to 40V, making it robust against fluctuations.
What is the switching frequency of the LM2576-5.0BU TR?
The switching frequency is typically 52kHz.
Is the LM2576-5.0BU TR RoHS compliant?
According to the available data, it is not RoHS compliant.
