1 Features

• 4V to 40V input range

• 3.5A continuous output current

• Ultra-low 40μA operating quiescent current

• 90mΩ high-side MOSFET

• 75ns minimum switch-on time

• Current mode control

• Adjustable switching frequency from 200kHz to

2.5MHz

• Frequency synchronization to external clock

• Internal compensation for ease of use

• High duty cycle operation supported

• Precision enable input

• 1μA shutdown current

• External soft start

• Thermal, overvoltage, and short protection

• 8-pin HSOIC with PowerPAD™ package

2 Applications

• Automotive battery regulation

• Industrial power supplies

• Telecom and datacom systems

• Battery powered system

3 Description

The LMR14030 is a 40V, 3.5A, 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. The regulator quiescent current is 40μA in

sleep mode, which is designed for battery powered

systems. An ultra-low 1μA current in shutdown mode

can further prolong battery life. 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.

This 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 built-in protection features such

as cycle-by-cycle current limit, thermal sensing and

shutdown due to excessive power dissipation, and

output overvoltage protection.