LTM8031

1

8031fb

Typical applicaTion

DescripTion

Ultralow Noise EMC 36V, 1A

DC/DC µModule Regulator

meet the radiated emissions requirements of EN55022.

Conducted emission requirements can be met by adding

standardfiltercomponents.Includedinthepackagearethe

switching controller, power switches, inductor, filters and

all support components. Operating over an input voltage

range of 3.6V to 36V, the LTM8031 supports an output

voltage range of 0.8V to 10V, and a switching frequency

range of 200kHz to 2.4MHz, each set by a single resistor.

Only the bulk input and output filter capacitors are needed

to finish the design. The low profile package (2.82mm)

enables utilization of unused space on the bottom of PC

boards for high density point of load regulation.

TheLTM8031ispackagedinathermallyenhanced,compact

(9mm

×15mm)andlowprofile(2.82mm)overmoldedland

grid array (LGA) package suitable for automated assembly

by standard surface mount equipment. The LTM8031 is

RoHS compliant.

Ultralow Noise 5V/1A DC/DC µModule Regulator

FeaTures

applicaTions

n

Complete Step-Down Switch Mode Power Supply

n

Wide Input Voltage Range: 3.6V to 36V

n

1A Output Current

n

0.8V to 10V Output Voltage

n

Switching Frequency from 200kHz to 2.4MHz

n

EN55022 Class B Compliant with Margin

n

Current Mode Control

n

(e4) RoHS Compliant Package with Gold Pad Finish

n

Programmable Soft-Start

n

Pin Compatible with the LTM8032

n

Low Profile (9mm

× 15mm × 2.82mm)

Surface Mount LGA Package

n

Automotive Battery Regulation

n

Power for Portable Products

n

Distributed Supply Regulation

n

Industrial Supplies

n

Wall Transformer Regulation

LTM8031 EMI Performance

L

, LT, LTC, LTM, µModule, Burst Mode, Linear Technology and the Linear logo are registered

trademarks of Linear Technology Corporation. All other trademarks are the property of their

respective owners.

RT

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47.5k

44.2k

*RUNNING VOLTAGE RANGE.

SEE APPLICATIONS FOR START-UP DETAILS

FIN

1µF

10µF

5V

1A

RUN/SS

7VDC TO 36VDC

PGOOD

BIAS

LTM8031

AUX

OUT

SYNC GND

8031 TA01a

ADJ

FREQUENCY (MHz)

0

50

70

800

8031 TA01b

30

EN55022

CLASS B

LIMIT

10

40

60

80

20

0

–10

200

100

400

300

600 700

900

500

1000