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dc2448abf
DEMO MANUAL
DC2448A-B
Description
LTM4636
High Efficiency, PolyPhase 120A
Step-Down Power µModule Regulator
Demonstration circuit DC2448A-B features a PolyPhase
®
design using the
LTM
®
4636EY
, a 40A high efficiency,
switch mode step-down power µModule
®
regulator. The
input voltage range is from 4.7V to 15V. When V
IN
< 5.5V,
short PVCC to VIN with R1 = 0Ω, and set R3 = 0Ω and
remove R2. The output voltage range is 0.6V to 3.3V. The
DC2448A-B can deliver a nominal 120A output current. As
explained in the data sheet, output current derating is nec-
essary for certain V
IN
, V
OUT
, and thermal conditions. The
board operates in continuous conduction mode in heavy
load conditions. For high efficiency at low load currents,
the MODE_PLLIN jumper selects pulse-skipping mode
for noise sensitive applications or Burst Mode
®
operation
L
, LT, LTC, LTM, Linear Technology, Burst Mode, µModule, PolyPhase and the Linear logo
are registered trademarks of Analog Devices, Inc. All other trademarks are the property of their
respective owners.
BoarD photo
in less noise sensitive applications. The MODE_PLLIN
pin also allows the LTM4636 to synchronize to an exter-
nal clock signal. The phases of the three LTM4636s are
0 degrees, 120 degrees and 240 degrees. DC2448A-B has
the option of choosing both internal and external com-
pensation circuit for LTM4636. The LTM4636 data sheet
must be read in conjunction with this demo manual prior
to working on or modifying demo circuit DC2448A-B.
Design files for this circuit board are available at
http://www.linear.com/demo/DC2448A-B
All manuals and user guides at all-guides.com
