TPS54140A

Product Folder Sample & Buy Technical Documents Tools & Software Support & Community Reference Design TPS54140A SLVSB55C – MAY 2012 – REVISED OCTOBER 2015 TPS54140A 1.5-A, 42-V Step-Down DC/DC Converter with Eco-mode™ 1 Features 1 3.5-V to 42-V Input Voltage Range 200-mΩ High-Side MOSFET High Efficiency at Light Loads with a Pulse Skipping Eco-mode™ Tighter Enable Threshold than TPS54140 for More Accurate UVLO Voltage Adjustable UVLO Voltage and Hysteresis 116-μA Operating Quiescent Current 1.3-μA Shutdown Current 100-kHz to 2.5-MHz Switching Frequency Synchronizes to External Clock Adjustable Slow Start/Sequencing UV and OV Power Good Output 0.8-V Internal Voltage Reference MSOP10 and 3-mm × 3-mm VSON-10 Package With PowerPAD™ Supported by WEBENCH® and SwitcherPro™ Software Tool 2 Applications 12-V and 24-V Industrial and Commercial Low Power Systems Aftermarket Auto Accessories: Video, GPS, Entertainment SPACE Simplified Schematic VIN VIN PWRGD TPS54140A BOOT EN SS /TR PH RT /CLK COMP VSENSE VOUT GND 3 Description The TPS54140A device is a 42-V, 1.5-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. Undervoltage lockout is internally set at 2.5 V, but can be inc...