ONSEMI Buck Step-Down Switching Regulator Fixed 5V 1A TO-263-5

The ONSEMI Buck (Step-Down) Switching Regulator provides a fixed 5V output and 1A current, offering a highly efficient solution for power supply design. Designed to minimise the number of external components, this switch-mode power supply simplifies the design process while delivering significantly higher efficiency compared to popular 3-terminal linear regulators, particularly at higher input voltages.

This regulator includes robust protection features such as cycle-by-cycle current limiting and thermal shutdown, ensuring full protection under fault conditions. It also features TTL shutdown capability, allowing for a low power standby mode. The device utilises readily available standard inductors, further streamlining circuit design and component sourcing.

With an input voltage range of 4.75V to 40V and a nominal switching frequency of 52kHz, this surface-mount regulator is well-suited for demanding environments. It operates reliably across a wide temperature range from -40°C to 125°C, making it an excellent choice for industrial and power management applications.

Key Specifications

• Output Voltage: Fixed 5V
• Output Current: 1A
• Input Voltage Range: 4.75V to 40V
• Topology: Buck (Step-Down)
• Package: TO-263-5 (D2PAK)
• Mounting: Surface Mount
• Efficiency: 77%
• Switching Frequency: 52kHz