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6 Test Procedure
6.1 Line/Load Regulation and Efficiency Measurement Procedure
1. Set up the EVM as described in Section 5 and Figure 3.
2. Ensure load is set to constant resistance mode and to sink 0 A
DC
.
3. Ensure all configuration settings are as per Section 6.
4. Increase V
IN
from 0 V to 12 V. Using V1 to measure input voltage.
5. Use V2 to measure V
OUT
voltage.
6. Vary load from 0 A
DC
to 10 A
DC
, V
OUT
should remain in load regulation.
7. Vary V
IN
from 9 V to 13.2 V, V
OUT
should remain in line regulation.
8. Decrease load to 0 A.
9. Decrease V
IN
to 0 V.
6.2 List of Test Points
Table 2. Test Point Functions
TEST POINTS NAME DESCRIPTION
TP1 V
IN
Input voltage measurement point
TP2 GND Ground for V
IN
measurements
TP3 PGOOD Power Good monitoring point
TP4 SW Switch Node monitoring point
TP5 V
OUT
Output Voltage measurement point
TP6 GND Ground for output voltage measurements
6.3 Equipment Shutdown
1. Shut down load
2. Shut down V
IN
3. Shut down fan
7
SLUU480–February 2011 Synchronous Buck NexFET Power Block
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