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dc1743af
DEMO MANUAL DC1743A
Description
LTM4613
8A, High Voltage Power
µModule Regulator
Demonstration circuit DC1743A features the LTM
®
4613EV,
an EN55022 class B certified, high input and output voltage,
high efficiency, switch mode step-down power µModule
®
regulator. The input voltage range is from 5V to 36V. The
output voltage is jumper programmable from 3.3V to 12V
with a rated load current of 8A. Derating is necessary
for certain V
IN
, V
OUT
, frequency and thermal conditions:
please refer to LTM4613 data sheet for derating curves.
Only input and output capacitors are needed externally.
The DC1743A offers the TRACK/SS pin allowing the user
to program output tracking or soft-start period. Output
perForMAnce sUMMArY
BoArD photo
voltage margining can also be realized through jumper
position selections.
Higher efficiency at low load currents is achieved by setting
the MODE pin jumper to DCM. The PLL pin is available
to synchronize the LTM4613EV to an external clock. The
LTM4613 data sheet must be read in conjunction with
this demo manual prior to working on or modifying demo
circuit DC1743A.
Design files for this circuit board are available at
http://www.linear.com/demo
(T
A
= 25°C)
PARAMETER
CONDITIONS
VALUE
Input Voltage Range
5V to 36V
Output Voltage V
OUT
Jumper Selectable
3.3V, 5V, 12V; ± 2%
Maximum Continuous Output Current
Derating Is Necessary for Certain Operating Conditions. See Data Sheet
for Details.
8A
DC
Default Operating Frequency
V
OUT
= 12V
V
OUT
= 5V
V
OUT
= 3.3V
600kHz
250kHz
165kHz
Efficiency
V
IN
= 12V, V
OUT
= 5V, I
OUT
= 8A
93.0% See Figure 3
Load Transient
V
IN
= 12V, V
OUT
= 5V
See Figure 4
L
, LT, LTC, LTM, µModule, Linear Technology and the Linear logo are registered trademarks of
Linear Technology Corporation. All other trademarks are the property of their respective owners.
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