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

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 increased using the enable pin. The output voltage startup ramp is controlled by the slow start pin that can also be configured for sequencing/tracking. An open drain power good signal indicates the output is within 94% to 107% of its nominal voltage.

A wide switching frequency range allows efficiency and external component size to be optimized. Frequency fold back and thermal shutdown protects the part during an overload condition.