Linear ANALOG DEVICES DC2448A-A Demo Manual

Description
Demonstration circuit DC2448A-A features a PolyPhase
design using the LTM 4636EY, a 40A high efficiency,
®
switch mode step-down power µModule
input voltage range is from 4.7V to 15V. When V
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-A can deliver a nominal 80A output current. As
explained in the data sheet, output current derating is nec-
essary for certain V , V
IN OUT
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
BoarD photo
Step-Down Power µModule Regulator
regulator. The
®
< 5.5V,
IN
, and thermal conditions. The
High Efficiency, PolyPhase 80A
noise sensitive applications or Burst Mode
®
less noise sensitive applications. The MODE_PLLIN pin
also allows the LTM4636 to synchronize to an external
clock signal. The phase shift between the two phases is
180 degree. DC2448A-A has the option of choosing both
internal and external compensation 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-A.
Design files for this circuit board are available at
http://www.linear.com/demo/DC2448A-A
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.
DEMO MANUAL
DC2448A-A
LTM4636
operation in
®
dc2448aaf
1