LV14540中文資料德州儀器數據手冊PDF規(guī)格書

1 Features

? 4V to 40V input range

? 5A continuous output current

? 100mΩ high-side MOSFET

? Minimum on time: 100ns

? Current mode control

? Adjustable switching frequency from 200kHz to

2MHz

? Frequency synchronization to external clock

? Internal compensation for ease of use

? High duty cycle operation supported

? Precision enable input

? 1μA shutdown current

? Thermal, overvoltage and short protection

? 8-pin HSOIC with PowerPAD? integrated circuit

package

2 Applications

? Automotive battery regulation

? Industrial power supplies

? Telecom and datacom systems

? Battery powered systems

3 Description

The LV14540 is a 40V, 5A, step-down regulator with

an integrated high-side MOSFET. With a wide input

range from 4V to 40V, the device is designed for

various applications from industrial to automotive for

power conditioning from unregulated sources. A wide

adjustable switching frequency range allows either

efficiency or external component size to be optimized.

Internal loop compensation means that the user is

free from the tedious task of loop compensation

design. Internal loop compensation also minimizes the

external components of the device. A precision enable

input allows simplification of regulator control and

system power sequencing. The device also has builtin

protection features such as cycle-by-cycle current

limit, thermal sensing and shutdown due to excessive

power dissipation, and output overvoltage protection.