TPS54140ADRCR

The TPS54140A device is a 42V, 1.5A, step-down regulator with an integrated high-side MOSFET. It uses current mode control for simple external compensation and flexible component selection. Its low-ripple pulse skip mode reduces the no-load regulated output supply current to 116μA. Using the enable pin, shutdown supply current can be reduced to 1.3μA. The undervoltage lockout voltage is internally set to 2.5V but can be raised using the enable pin. The output voltage startup ramp is controlled by the slow-start pin, which can also be configured to control sequencing/tracking. An open-drain power-good signal indicates that the output is within 94% to 107% of its nominal voltage. The wide switching frequency range allows optimization of efficiency and external component size. Frequency foldback and thermal shutdown protect the device under overload conditions.

Applications

• 12V and 24V industrial and commercial low-power systems
• Automotive aftermarket accessories: video, GPS, entertainment systems

Key features

• Input voltage range: 3.5V to 42V
• 200mΩ high-side MOSFET
• High efficiency Eco-mode™ at light loads via pulse skipping
• Tighter enable threshold than TPS54140 for more accurate UVLO voltage
• Adjustable UVLO voltage and hysteresis
• 116μA quiescent current
• 1.3μA shutdown current
• 100kHz to 2.5MHz switching frequency synchronizable to external clock
• Adjustable soft-start/sequencing
• UV and OV power-good output
• 0.8V internal voltage reference
• MSOP10 package with PowerPAD and 3mm×3mm VSON-10 package
• Supported by WEBENCH and SwitcherPro software tools