Overview
The LM2576HVT-5.0 is a high-efficiency step-down (buck) switching regulator produced by National Semiconductor. This model is part of the SIMPLE SWITCHER® series, designed to simplify the design of switch-mode power supplies. It is widely used in power management applications due to its ability to deliver up to 3A of output current with minimal external components. The LM2576HVT-5.0 is particularly suitable for industrial, automotive, and consumer electronics, offering a fixed 5V output voltage. Its high input voltage range (up to 60V) and robust design make it a competitive choice for various power supply solutions.
Key Specifications
| Parameter | Value | Unit | Notes |
|---|---|---|---|
| Output Current | 3 | A | |
| Switching Frequency | 52 | kHz | |
| Output Type | Fixed | ||
| Output Voltage | 5 | V | |
| Input Voltage Range | 4 to 60 | V | |
| Topology | Step-Down | ||
| Output Configuration | Positive | ||
| Package | TO-220-5 | ||
| Operating Temperature | -40 to +125 | °C | |
| Storage Temperature | -65 to +150 | °C |
Key Features
- High efficiency step-down switching regulator.
- Fixed 5V output voltage with ±4% accuracy.
- Wide input voltage range (4V to 60V).
- Internal frequency compensation and fixed-frequency oscillator (52kHz).
- Built-in thermal shutdown and current limit protection.
- Requires minimal external components for operation.
Applications
The LM2576HVT-5.0 is widely used in various applications, including industrial automation, automotive electronics, and consumer electronics. It is particularly effective in power supply designs for devices requiring a stable 5V output, such as microcontrollers, sensors, and communication modules. Its robust design and high input voltage tolerance make it suitable for harsh environments and battery-powered systems.
Q & A
1. What is the maximum output current of the LM2576HVT-5.0?
The maximum output current is 3A.
2. What is the switching frequency of this regulator?
The switching frequency is 52kHz.
3. Can the LM2576HVT-5.0 handle input voltages above 40V?
Yes, it can handle input voltages up to 60V.
4. What is the output voltage accuracy?
The output voltage accuracy is ±4%.
5. Is the LM2576HVT-5.0 suitable for automotive applications?
Yes, its robust design and wide input voltage range make it suitable for automotive applications.
6. Does this regulator require external components for operation?
It requires minimal external components, simplifying the design process.
7. What protection features are included?
It includes thermal shutdown and current limit protection.
8. What is the operating temperature range?
The operating temperature range is -40°C to +125°C.
9. What is the package type of the LM2576HVT-5.0?
It comes in a TO-220-5 package.
10. Is the LM2576HVT-5.0 a step-up or step-down regulator?
It is a step-down (buck) regulator.
