LTM4653

1

Rev 0

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TYPICAL APPLICATION

FEATURES

DESCRIPTION

EN55022B Compliant 58V, 4A

Step-Down DC/DC

μModule Regulator

4A, 24V Output Low EMI DC/DC μModule Regulator

with Analog Output Current Indicator

APPLICATIONS

n

Complete Low EMI Switch Mode Power Supply

n

EN55022 Class B Compliant

n

Wide Input Voltage Range: 3.1V to 58V

n

Up to 4A Output Current

n

n

±1.67% Total DC Output Voltage Error Over Line,

Load and Temperature (–40°C to 125°C)

n

Parallel and Current Share with Multiple LTM4653s

n

Analog Output Current Indicator

n

Programmable Input Voltage Limiting

n

Constant-Frequency Current Mode Control

n

Power Good Indicator and Programmable Soft-Start

n

Overcurrent/Overvoltage/Overtemperature Protection

n

15mm × 9mm × 5.01mm BGA Package

n

Avionics, Industrial Control and Test Equipment

n

Video, Imaging and Instrumentation

n

48V Telecom and Network Power Supplies

n

RF Systems

All registered trademarks and trademarks are the property of their respective owners. Protected

by U.S. Patents, including 5481178, 5705919, 5847554, 6580258.

Radiated Emission Scan in a 10m Chamber

PINS NOT USED IN

THIS CIRCUIT:

CLKIN, PGOOD, COMPb

ISETa

GND

ISETb

RUN

VINREG

COMPa

LTM4653

UP TO 4A

ANALOG OUTPUT

CURRENT INDICATOR

10µF

×2

LOAD

124k

10nF

499

481k

4.7 F

4.7 F

28V TO 58V

4653 TA01a

SGND

PGND

IMONa

IMONb

50

60

70

40

30

20

10

–10

0

FREQUENCY (MHz)

30

830

130

230

330

430

530

630

730

930 1000

4653 TA01b

[1] HORIZONTAL

[2] VERTICAL

QPK LIMIT

FORMAL

MEAS DIST 10m

SPEC DIST 10m

+

The LTM®4653 is an ultralow noise 58V, 4A DC/DC step-

emissions requirements of EN55022. Conducted emis-

sion requirements can be met by adding standard filter

components. Included in the package are the switching

controller, power MOSFETs, inductor, filters and support

components.

Operating over an input voltage range of 3.1V to 58V, the

LTM4653 supports an output voltage range of 0.5V to

to 3MHz (400kHz default), each set by a single resistor.

For high load currents, the LTM4653 can be paralleled in

clock. Only the bulk input and output filter capacitors are

needed to finish the design.

The LTM4653 is offered in a 15mm × 9mm × 5.01mm

BGApackagewithSnPborRoHScompliantterminalfinish.