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dc1759af
DEMO MANUAL DC1759A
DESCRIPTION
LTM4620A
High Efficiency, Dual 13A Step-Down
Power µModule Regulator
Demonstration circuit 1759A features the LTM
®
4620AEV,
the high efficiency, high density, dual 13A, switch mode
step-down power module regulator. The input voltage is
from 5.5V to 16V. The output voltage is programmable
from 0.6V to 5V. DC1759A can deliver 13A maximum
current from each channel. As explained in the data sheet,
output current derating is necessary for certain V
IN
, V
OUT
,
and thermal conditions. The board operates in continuous
conduction mode in heavy load conditions. For high effi-
ciency at low load currents, the MODE jumper (JP1) selects
pulse-skipping mode for noise sensitive applications or
Burst Mode
®
operation in less noise sensitive applications.
Two outputs can be connected in parallel for a single 26A
output solution with optional jumper resistors. The board
allows the user to program how its output ramps up and
L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks
of Linear Technology Corporation. All other trademarks are the property of their respective
owners.
down through the TRACK/SS pin. The output can be set
up to either coincidentally or ratiometrically track with
another supply’s output. Remote output voltage sensing
is available for improved output voltage regulation at
the load point. These features and the availability of the
LTM4620AEV in a compact 15mm × 15mm × 4.41mm
LGA package make it ideal for use in many high density
point-of-load regulation applications. The LTM4620A data
sheet must be read in conjunction with this demo manual
for working on or modifying the demo circuit 1759A.
Design files for this circuit board are available at
http://www.linear.com/demo
Figure 1. LTM4620A/DC1759A Demo Board
Specifications are at T
A
= 25°C
