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dc1738af
DEMO MANUAL DC1738A
Description
LTM8028
36V
IN
, UltraFast, Low Output
Noise, 5A µModule Regulator
Demonstration circuit 1738A features the
LTM
®
8028
, a
µModule
®
step-down converter that integrates both a high
efficiency switching regulator and a 5A UltraFast™ linear
regulator, resulting in a low noise solution suitable for high
speed data applications. The demo circuit is designed for
an input voltage of 6V to 36V and an operating frequency
of 250kHz. The output voltage is digitally programmable
from 0.8V to 1.8V in 50mV increments by adjusting the
three tri-state inputs VO0, VO1, and VO2.
The user may adjust the output voltage over a continuous
±10% range by applying a voltage to MARGA. A PGOOD
signal indicates that the output is within 10% of the target
L
, LT, LTC, LTM, Linear Technology, the Linear logo and µModule are registered trademarks
and UltraFast is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
BoarD photo
voltage. The SENSEP pin creates a Kelvin sense connec-
tion to account for voltage drops due to PCB resistances
between the regulator and the load.
The LTM8028 data sheet gives a complete description of
the part, operation and application information. The data
sheet must be read in conjunction with this demo manual
prior to working on or modifying DC1738A.
Design files for this circuit board are available at
http://www.linear.com/demo
