TPS54040DGQR | Texas Instruments

Step-Down Converter, TPS54040DGQR, Texas Instruments

The TPS54040DGQR device is a 42-V, 0.5-A, step-down regulator with an integrated high-side MOSFET. Current-mode control provides simple external compensation and flexible component selection. A low-ripple pulse-skip mode reduces the no-load, regulated output supply current to 116 µA. Using the enable pin, shutdown supply current is reduced to 1.3 µA when the enable pin is low. Undervoltage lockout is internally set at 2.5 V, but can be increased using the enable pin. The output-voltage startup ramp is controlled by the slow-start pin, which can also be configured for sequencing/tracking. An open-drain power-good signal indicates the output is within 93% to 107% of its nominal voltage. A wide switching-frequency range allows efficiency and external component size to be optimized. Frequency foldback and thermal shutdown protect the part during an overload condition.

Features

• High Efficiency at Light Loads with a Pulse Skipping Eco-Mode
• Synchronizes to External Clock
• Adjustable Slow Start/Sequencing