LTM4612

1

4612f

PGOOD

RUN

COMP

TRACK/SS

FCB

MARG0

MARG1

MPGM

0.01μF

10μF

100pF

12V

5A

22V

TO 36V

PLLIN

CLOCK SYNC

LTM4612

SGND

PGND

MARGIN

CONTROL

100k

2M

5.23k

392k

5% MARGIN

4612 TA01

TYPICAL APPLICATION

FEATURES

APPLICATIONS

DESCRIPTION

Ultralow Noise

DC/DC µModule

input and output, 5A switching mode DC/DC power supply.

Included in the package are the switching controller, power

FETs, inductor and all support components. Operating

over an input voltage range of 5V to 36V, the LTM4612

supports an output voltage range of 3.3V to 15V, set by a

single resistor. Only bulk input and output capacitors are

needed to finish the design.

High switching frequency and an adaptive on-time current

mode architecture enables a very fast transient response

to line and load changes without sacrificing stability.

The onboard input filter and noise cancellation circuits

achieve low noise coupling, thus effectively reducing the

electromagnetic interference (EMI)—see Figures 4 and 8.

with an external clock for reducing undesirable frequency

currents.

The LTM4612 is offered in a space saving and thermally

enhanced 15mm

× 15mm × 2.8mm LGA package, which

enables utilization of unused space on the bottom of PC

boards for high density point-of-load regulation. The

LTM4612 is Pb-free and RoHS compliant.

12V/5A Ultralow Noise μModule with 22V to 36V Input

(LTM4612MPV)

(15mm

× 15mm × 2.8mm) LGA Package

, LT, LTC, LTM and PolyPhase are registered trademarks of Linear Technology

Corporation. μModule is a trademark of Linear Technology Corporation. All other

trademarks are the property of their respective owners.

Efficiency vs Load Current at 12V Output

OUTPUT CURRENT (A)

0

70

95

100

1

2

3

60

85

65

90

55

50

80

75

4

5

4612 TA01b