TPS54140ADRCR集成电路（IC）的稳压器-DC-DC开关稳压器规格书PDF中文资料

TPS54140ADRCR属于集成电路（IC）的稳压器-DC-DC开关稳压器。由德州仪器制造生产的TPS54140ADRCR稳压器 - DC-DC 开关稳压器DC-DC 开关稳压器 PMIC（电源管理集成电路）产品族中的产品是元器件级设备，用于需要稳定 DC 输入电压和/或将其转换为不同幅度的输出电压的应用。这些器件与称为“控制器”PMIC 的类似产品的区别在于集成了主开关元件，设备提供的电力会通过该元件。

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.