1 Features

1• 3.5- to 42-V Input Voltage Range

• 200-mΩ High-Side MOSFET

• High Efficiency at Light Loads with a Pulse

Skipping Eco-mode™

• 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 and Sequencing

• UV and OV Power-Good Output

• Adjustable UVLO Voltage and Hysteresis

• 0.8-V Internal Voltage Reference

• MSOP10 Package With PowerPAD™

• Supported by WEBENCH® Software Tool

(www.TI.com/WEBENCH)

2 Applications

• 12-V and 24-V Industrial and Commercial Low

Power Systems

• Aftermarket Auto Accessories: Video, GPS,

Entertainment

3 Description

The TPS54140 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, the 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 and

tracking. An open-drain power-good signal indicates the output is within 94% to 107% of the nominal

voltage.

A wide switching frequency range allows efficiency

and external component size to be optimized.

Frequency foldback and thermal shutdown protects

the device during an overload condition.

The TPS54140 device is available in a 10-pin

thermally enhanced MSOP PowerPAD package.