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LT3090 Datasheet(PDF) 2 Page - Linear Technology

Part No. LT3090
Description  –36V, 600mA Negative Linear Regulator with Programmable Current Limit
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Maker  LINER [Linear Technology]
Homepage  http://www.linear.com
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LT3090 Datasheet(HTML) 2 Page - Linear Technology

   
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dc1948af
DEMO MANUAL DC1948A
Quick start proceDure
Demonstration circuit 1948A is easy to set up to evalu-
ate the performance of the LT3090. 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 terminals of the input or output capacitors. See
Figure 2 for proper scope probe technique.
1. Use JP2 to set the desired output voltage.
2. Put JP4 on ON position.
3. With power off, connect the input power supply to VIN
and GND.
4. Turn on the power at the VIN.
NOTE. Make sure that the VIN voltage does not exceed
–36V.
5. Check for the proper output voltages:
NOTE. If there is no output, temporarily disconnect the
load to make sure that the load is not set too high or
is shorted.
6. Once the proper output voltages are established, adjust
the loads within the operating range and observe the
output voltage regulation, efficiency and other param-
eters.
NOTE. Make sure that the power dissipation is limited
below the thermal limit.
Figure 2. Measuring Input or Output Ripple
Figure 1. DC1948A Proper Equipment Setup


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