Linear Technology DC2455A-C Demo Manual

Description
Demonstration Circuit 2455A-C features PolyPhase
using the LTM 4650EY-1
®
high density, dual 25A, switch mode step-down power
module regulator. The input voltage is from 4.5V to 15V.
The output voltage is jumper selectable from 0.9V to 1.8V.
DC2455A-C can deliver nominal 200A output current. As
explained in the data sheet, output current de-rating is
necessary for certain V
LTM4650-1 on DC2455A-C always operate in continuous
conduction mode. The switching frequency can be pro-
grammed through a resistor or can be synchronized to an
external clock signal. The board allows the user to program
how its output voltage ramps up and down through the
Arrow.com.
Downloaded from
High Efficiency, PolyPhase 200A Step-Down
(B-grade), the high efficiency,
, V , and thermal conditions. The
IN OUT
Figure 1. 4× LTM4650-1, 200A PolyPhase LTM4650-1/DC2455A-C Demo Board
DEMO MANUAL DC2455A-C
Power µModule
4× LTM4650EY-1, 200A
design TRACK pin. The output voltage is tightly regulated between
®
+
"V " and "V
O O
which improves output voltage regulation at heavy loads.
These features and the availability of the LTM4650EY-1
in a compact 16mm × 16mm × 5.01mm BGA package
make it ideal for use in many high-density point-of-load
regulation applications. The LTM4650-1 data sheet must
be read in conjunction with this demo manual for working
on or modifying the demo circuit DC2455A-C.
Design files for this circuit board are available at
http://www.linear.com/demo/DC2455A-C
L, LT, LTC, LTM, Linear Technology, the Linear logo, µModule, PolyPhase and TimerBlox are
registered trademarks of Linear Technology Corporation. All other trademarks are the property
of their respective owners.
LTM4650EY-1
Regulator
®
–
" through remote output voltage sensing
dc2455acf
1