1 Features

• 4V to 40V input range

• 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 LMR14050 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. 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. 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 built-in

protection features such as cycle-by-cycle current

limit, thermal sensing and shutdown due to excessive

power dissipation, and output overvoltage protection.