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LV14340 40V, 3.5A, 2MHz, Step-Down Converter

1 Features

•New product available:

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

synchronous converter

•For faster time to market:

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

power module

•4V to 40V input range

•3.5A continuous output current

•100mΩ high-side MOSFET

•100ns minimum on time

•Current mode control

•200kHz to 2MHz adjustable switching frequency

•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 SOIC with PowerPAD

™

package

2 Applications

•Automotive battery regulation

•Industrial power supplies

•Telecom and datacom systems

•Battery powered systems

space

3 Description

The LV14340 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. 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 built-

in 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.

Package Information

PART NUMBERPACKAGE

(1)

PACKAGE SIZE

(2)

LV14340DDA (HSOIC, 8)4.9mm × 6mm

(1)For more information, see Section 10.

(2)The package size (length × width) is a nominal value and

includes pins, where applicable.

BOOT

SW

L

C

BOOT

FB

VIN

V

IN

up to 40 V

GND

C

OUT

EN

C

IN

SS

RT/SYNC

V

OUT

C

SS

D

R

FBT

R

FBB

R

T

Simplified Schematic

I

OUT

(A)

Efficiency (%)

01234

60

70

80

90

100

D001

V

IN

= 12 V, g

SW

= 500 kHz

V

OUT

= 5 V

V

OUT

= 3.3 V

Efficiency vs Output Current

LV14340

SNVSAD7C – JUNE 2015 – REVISED DECEMBER 2024

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

Produktspecifikationer