Linear Technology DC1297B - LTM4612EV Demo Board | EN55022B Compliant DC1297B DC1297B Datenbogen

LTM4612

1

4612fb

EN55022B Compliant

36V

IN

, 15V

OUT

, 5A,  

DC/DC µModule Regulator

The LTM

®

4612 is a EN55022 Class B certified high voltage 

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.  

Furthermore, the DC/DC µModule

®

 regulator can be syn-

chronized with an external clock to reduce undesirable 

frequency harmonics and allow PolyPhase

®

 operation for 

high load 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.

L

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

trademarks and LTpowerCAD is a trademark of Linear Technology Corporation. All other 

trademarks are the property of their respective owners.

n

  Complete Low EMI Switch Mode Power Supply

n

  EN55022 Class B Compliant 

n

  Wide Input Voltage Range: 5V to 36V

n

  3.3V to 15V Output Voltage Range

n

  5A DC, 7A Peak Output Current

n

  Low Input and Output Referred Noise

n

  Output Voltage Tracking and Margining

n

  Power Good Tracks with Margining

n

  PLL Frequency Synchronization

n

 ±1.5% Set Point Accuracy

n

  Current Foldback Protection (Disabled at Start-Up)

n

  Parallel/Current Sharing

n

  Ultrafast Transient Response 

n

  Current Mode Control

n

  Programmable Soft-Start

n

  Output Overvoltage Protection 

n

  –55°C to 125°C Operating Temperature Range 

(LTM4612MPV) 

n

  Small Surface Mount Footprint, Low Profile  

(15mm × 15mm × 2.8mm) LGA Package

n

  Telecom and Networking Equipment

n

  Industrial and Avionic Equipment

n

  RF Systems

FREQUENCY (MHz)

30

dBµV/m

30

70

128.1

226.2

324.3

10

60

20

0

–10

50

40

422.4

520.5

618.6

716.7

814.8

912.9

1010

EN55022 CLASS B LIMIT

4612 TA01b

PGOOD
RUN
COMP
INTV

CC

DRV

CC

f

SET

TRACK/SS

FCB

MARG0
MARG1

MPGM

V

OUT

V

FB

V

IN

0.01µF

10µF

100pF

C

OUT

V

OUT

5V

5A

C

IN

V

IN

7V

TO 36V

PLLIN

CLOCK SYNC

LTM4612

SGND

V

D

PGND

MARGIN

CONTROL

100k

2M

13.7k

392k

5% MARGIN

4612 TA01