Step-down (buck) regulator Texas Instruments LM2576HVT adjustable 4–60 V input, 1.23–57 V output, TO-220-5

The Texas Instruments LM2576HVT adjustable step-down (buck) regulator in a TO-220-5 package is designed for efficient DC–DC conversion where a wide input range and adjustable output are required. The device accepts input voltages from 4 V to 60 V and provides an adjustable output from 1.23 V up to 57 V. Its through-hole TO-220-5 form factor facilitates mechanical mounting and heatsinking, making it suitable for power supplies, industrial electronics, and battery-powered applications that need reliable point-of-load regulation.

Advantages

The regulator offers a wide input voltage range and a large adjustable output span, enabling use across varied systems without multiple part variants. The switching topology delivers higher efficiency compared with linear regulators, reducing heat dissipation for the same power transfer. The TO-220-5 package supports straightforward through-hole assembly and improved thermal management through heatsinks. Integrated control functions simplify external component requirements for typical buck regulator designs.

Suitable for

• Power supply modules and bench power projects
• Industrial control electronics and automation systems
• Battery-powered devices and battery management subsystems
• Point-of-load regulation on printed circuit boards
• Voltage conversion for sensors, actuators, and microcontrollers

Key specifications

• Input voltage range: 4 V to 60 V
• Adjustable output voltage range: 1.23 V to 57 V
• Switching regulator (step-down / buck) topology
• TO-220-5 through-hole package for heatsinking
• Designed for point-of-load and intermediate power conversion

How to use

Design the external inductor, diode, input and output capacitors, and feedback resistors according to the regulator’s application guidelines to achieve the desired output voltage and stable operation. Mount the TO-220-5 package to a suitable heatsink if required by the power dissipation. Place the input decoupling close to the regulator, maintain short traces for the switching node, and follow recommended PCB layout practices to minimize EMI. Verify output voltage with a multimeter and check thermal behaviour under expected load conditions.

Recommendations

For reliable operation, select external components (inductor, diode, capacitors) rated for the intended current and voltage margins, and ensure adequate thermal management when operating at higher input voltages or loads. Follow manufacturer application notes for loop compensation and EMI mitigation to achieve stable regulation and maintain efficiency.