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

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 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.