Quick Start Procedure - Linear Technology DC2056A Demo Manual

DEMO MANUAL DC2056A

QUICK START PROCEDURE

Demonstration circuit 2056A is easy to set up to evaluate
the performance of the LTC3637. Refer to Figure 1 for
the proper measurement equipment setup and follow the
procedure below:
1. With power off, connect the input power supply (set
for 0V) to VIN and GND (input return).
2. Select 5V output using jumper JP1 (B position) and
JP2 (A position). Select ON position for JP3.
3. Connect the 5V output load between VOUT and GND
(Initial load: no load).
4. Connect the DVMs to the input and outputs.
5. Turn on the input power supply and slowly increase to
12V. Check for the proper output voltages. (5V output
should be within 5V ±2%.)
6. Once the proper output voltages are established, ad-
just the loads within the operating range and observe
the output voltage regulation, ripple voltage and other
parameters.
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7. With power off, move jumpers JP1 and JP2 to the other
fixed voltage settings (1.8V or 3.3V). Repeat steps 5
and 6. Check for the proper out-put voltage and other
parameters.
Note: When measuring the output or input voltage ripple,
do not use the long ground lead on the oscilloscope probe.
See Figure 2 for the proper scope probe technique. Short,
stiff leads need to be soldered to the (+) and (–) terminals
of an output capacitor. The probe's ground ring needs to
touch the (–) lead and the probe tip needs to touch the
(+) lead.
Additional Notes
1. CAUTION: Be careful when testing with high voltage.
High voltage can result in an electric shock if care
is not taken.
2. For 5V output, V input voltage should be at least 5V
IN
or higher.
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