1 Features

• New product available:

– LMR51440 4 to 36-V, 4-A, 200-kHz to 1.1-MHz

synchronous converter

• For faster time to market:

– TLVM13640 3 to 36-V, 4-A, 200-kHz to 2.2-MHz

power module

• 4-V to 40-V input range

• 3.5-A continuous output current

• 100-mΩ high-side MOSFET

• 100-ns minimum on time

• Current mode control

• 200-kHz to 2-MHz adjustable switching frequency

• Frequency synchronization to external clock

• Internal compensation for ease of use

• High duty cycle operation supported

• Precision enable input

• 1-μA shutdown current

• Thermal, overvoltage, and short protection

• 8-Pin SOIC with PowerPAD™ package

2 Applications

• Automotive battery regulation

• Industrial power supplies

• Telecom and datacom systems

• Battery powered systems

3 Description

The LV14340 is a 40-V, 3.5-A step-down regulator

with an integrated high-side MOSFET. With a wide

input range from 4 V to 40 V, 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. This feature 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.

The LV14340 is available in an 8-pin HSOIC with

exposed pad for low thermal resistance.