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dc1238bf
DEMO MANUAL DC1238B
QUICK START PROCEDURE
Demonstration circuit 1238 is an easy way to evaluate the
performance of the LTM8021. Refer to figure 1 for proper
measurement equipment setup and follow the procedure
below:
NOTE. When measuring the input or output voltage ripple,
care must be taken to avoid a long ground lead on the
oscilloscope probe. Measure the input or output voltage
ripple by touching the probe tip directly across the VIN or
VOUT and GND terminals. See Figure 2 for proper scope
probe technique.
1. Place JP1 on the ON position.
2. With power off, connect the input power supply to VIN
and GND.
3. Turn on the power at the input.
NOTE. Make sure that the input voltage does not exceed
the maximum rated input voltage of the LTM8021.
4. Check for the proper output voltage. VOUT = 5V ±3%
NOTE. If there is no output, temporarily disconnect the
load to make sure that the load is not set too high.
5. 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.
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