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DEMO MANUAL DC1083A-B
QUICK START PROCEDURE
Demonstration circuit 1083A-B is an easy way to evaluate
the performance of the LTM4603HV. Please refer to Figure 1
for proper measurement equipment setup and follow the
procedure below:
1. Place jumpers in the following positions for a typical
1.5V OUT application:
5. To measure input and output ripple, please refer to
Figure 2 for proper setup.
6. For optional load transient test, apply adjustable pulse
signal between IOSTEP CLK and GND pins. Pulse ampli-
tude sets the current step. The pulse signal should have
very small duty cycle (<5%) to limit the thermal stress
MARG0
LO
MARG1
LO
RUN
ON
VOUT SELECT
1.5V
on the transient load circuit. The output transient current
can be monitored at BNC connector J3 (10mV/A), the
output voltage can be monitor at BNC connector J4.
2. With power off, preset the load to 0A and V IN supply to
be less than 28V. Connect the input power supply, load
and meters as shown in Figure 1.
7. For margining function test, place jumper MARG0 and
MARG1 in the configurations shown in the following
table, measure the output voltage at J4.
3. Turn on the power at the input. The output voltage
should be 1.5V ± 2%.
4. Once the proper output voltage is established, adjust the
load within the operating range and observe the output
voltage regulation, ripple voltage, efficiency and other
MARG1
LO
LO
HI
HI
MARG0
LO
HI
LO
HI
ΔVOUT
0
5%
–5%
0
parameters.
DC1083AB F01
Figure 1. Test Setup of DC1083A-B (DRV CC Bias Supply is Optional)
dc1083abf
2
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