TEXAS INSTRUMENTS LM2576HVT-ADJ Step Down Regulator, 3A, TO-220

The LM2576HVT-ADJ from Texas Instruments is a monolithic adjustable step-down (buck) switching regulator in a 5-pin TO-220 package. It integrates all active functions required for a high-efficiency switching power supply, needing only four external components. This regulator features a fixed 52 kHz internal oscillator, internal frequency compensation, and offers excellent line and load regulation, making it a straightforward and reliable solution for power management designs.

The wide 4V to 60V input voltage range and adjustable output from 1.23V to 57V, with a continuous 3A output current, allow flexible use in a variety of applications. It delivers high efficiency (up to 77%), which reduces heat sink requirements and saves space. A TTL shutdown capability enables a low-power standby mode with a typical 50µA standby current. Integrated thermal shutdown and current limit protection ensure safe operation under fault conditions.

The LM2576HVT-ADJ is designed to operate over a -40°C to 125°C temperature range, making it suitable for demanding environments. It is pin-compatible with popular three-terminal linear regulators, providing a higher efficiency alternative that simplifies power supply design. This regulator is optimised for use with standard series of inductors, streamlining the design process.

Specifications

• Output Type: Adjustable
• No. of Outputs: 1
• Topology: Buck (Step Down)
• Input Voltage Range: 4V to 60V
• Output Voltage Range: 1.23V to 57V
• Output Current: 3A
• IC Case / Package: TO-220
• No. of Pins: 5
• Switching Frequency: 52 kHz
• Operating Temperature Range: -40°C to 125°C
• Product Range: LM2576xx