Texas Instruments TPS5430DDA Step Down Regulator, 5.5-36V in, 1.22-31V 3A Out,

The Texas Instruments TPS5430DDA is a high-efficiency, adjustable DC-DC switching buck regulator designed to deliver robust power management in a compact HSOP-8 package. It integrates a high-performance, 110-mΩ N-channel MOSFET switch, enabling conversion efficiencies of up to 95%. This makes it an ideal choice for designs where thermal performance and power loss are critical concerns.

This regulator accepts a wide input voltage range from 5.5V to 36V, making it suitable for regulating various power sources, including 24V industrial buses. It provides an adjustable output from 1.22V to 31V, capable of delivering a continuous output current of up to 3A. The fixed 500kHz switching frequency allows for the use of smaller external filter components, saving valuable board space.

Key Features & Protections

• Integrated Design: Features internal loop compensation, which minimises the external component count and simplifies circuit design.
• Voltage Feed-Forward: This technology improves line regulation and transient response for more stable output under varying load conditions.
• Comprehensive Protection: The system is safeguarded by overcurrent limiting, overvoltage protection, and thermal shutdown.
• Control & Efficiency: An active-high enable (ENA) pin reduces shutdown supply current to typically 18µA. Other integrated features include an undervoltage-lockout (UVLO) circuit and a slow-start circuit to limit inrush current during start-up.

With an operating junction temperature range of –40°C to 125°C, this regulator is built for reliability in demanding environments. Its small footprint and high level of integration make it a versatile solution for optimising power supply designs across multiple sectors.