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DEMO MANUAL DC1194A
QUICK START PROCEDURE
Demonstration circuit 1194A is easy to set up to evalu-
ate the performance of the LTM8020. Refer to Figure 4
for proper measurement equipment setup and follow the
procedure below:
NOTE: Do not hot-plug the V IN terminal at high input
voltage. The absolute maximum voltage on V IN is 40V
and hot-plugging a power supply through wire leads to
the demonstration circuit can cause the voltage on the
extremely low ESR ceramic input capacitor to ring to
twice its DC value. In order to protect the IC, a higher
ESR aluminum electrolytic capacitor is placed at the input
terminals. This may protect against some, but not all, input
transients due to hot-plugging with a power supply. See
Application Note 88 for more details.
1. Connect the power supply (with power off), load, and
meters as shown in Figure 4.
2. After all connections are made, turn on input power
and verify that the output voltage is 3.3V.
NOTE: If the output voltage is too low, temporarily
disconnect the load to make sure that the load is not
set too high.
3. 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 parameters.
–
+
A
–
A
+
+
+
–
V
V
+
–
+
LOAD
–
–
OPTIONAL
DC1194A F04
Figure 4. Proper Measurement Equipment Setup
dc1194af
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