UG-439
Evaluation Board User Guide
Rev. A | Page 8 of 13
MEASURING OUTPUT VOLTAGE
Figure 16 shows how the evaluation board can be connected to
a voltage source and a voltmeter for basic output voltage accuracy
measurements. It shows a voltage source connected to VIN1 and a
voltmeter connected to VOUT1S, which is the output voltage sense
terminal of Buck 1. JEN1 is connected to VIN1 via a shunt that
enables Buck 1; JEN2, JEN3, and JEN4 are connected to ground,
disabling the other channels.
When measuring the voltages on VOUT2, VOUT3, and VOUT4,
ensure that the respective channels are enabled, and the volt meters
are connected to the respective outputs. A resistor can be used as
the load for the regulator. Ensure that the resistor has a power
rating adequate to handle the power expected to be dissipated
across it. An electronic load can also be used as an alternative.
Ensure that the voltage source supplies enough current for the
expected load levels.
Figure 16. Output Voltage Measurement
+
–
VOLTAGE
SOURCE
+
–
1.99711
VOLTMETER
10895-
013
