TPS54140ADRCR.A中文资料德州仪器数据手册PDF规格书

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.