LM2576T-5.0 Buck 5V 3A 40V DC-DC Converters DIP IC TO-220-5
The LM2576T-5.0 is a monolithic switching regulator IC designed for efficient DC-DC step-down (buck) voltage conversion. It provides a fixed 5V output with up to 3A load current, making it suitable for powering microcontrollers, embedded systems, and other digital circuits. The device integrates the main switching regulator functions in a single chip, simplifying power supply design and reducing the number of external components required.
Operating with a wide input voltage range up to 40V, the LM2576 series offers improved efficiency compared to traditional linear regulators. It features internal frequency compensation, a fixed switching frequency oscillator, and built-in protection functions such as thermal shutdown and current limiting. Its TO-220-5 through-hole package allows easy mounting and good heat dissipation, making it widely used in industrial electronics, embedded systems, and power supply modules.
Features:
- Fixed 5V output voltage.
- 3A output current capability.
- Wide input voltage range: 4V to 40V.
- High efficiency up to 77%.
- Requires only four external components.
- 52kHz fixed frequency operation.
- TTL shutdown capability.
- Low power standby mode.
- Thermal shutdown and current limit protection.
Specification:
| Category | Details |
|---|---|
| Model Number | LM2576T-5.0 |
| Voltage Regulators – DC DC Switching Regulators | Step-Down (Buck) Converter |
| Part Status | Active |
| Function | Step-Down |
| Output Configuration | Positive |
| Topology | Buck |
| Output Type | Fixed |
| Number of Outputs | 1 |
| Voltage – Input (Min) | 4V |
| Voltage – Input (Max) | 40V |
| Voltage – Output (Min/Fixed) | 5V |
| Current – Output | 3A |
| Frequency – Switching | 52kHz |
| Synchronous Rectifier | No |
| Operating Temperature | -40°C ~ 125°C (TJ) |
| Mounting Type | Through Hole |
| Package / Case | TO-220-5 |
Pinout:
| Pin Number | Pin Name | Description |
|---|---|---|
| 1 | VIN | Supply input (40V max). Requires bypass capacitor to GND. |
| 2 | OUTPUT | Switching output. Internal MOSFET connects to inductor and diode. |
| 3 | GND | Ground reference. |
| 4 | FB | Feedback (fixed 5V version). Connect directly to output for regulation. |
| 5 | ON/OFF | Enable. Logic low enables operation; logic high shuts down. Do not float. |
Footprint:
Applications:
- High-efficiency step-down voltage regulation.
- Pre-regulator for linear regulators.
- On-card switching regulators.
- Power supplies for microcontrollers and digital circuits.
- Battery chargers.
- Distributed power systems.
Package Include:
- 1x LM2576T-5.0 Buck 5V 3A 40V DC-DC Converters DIP IC TO-220-5.