AN2566 Datasheet, PDF (23/29 Pages) STMicroelectronics – PM6680 evaluation kit dual step-down controller

AN2566
Test setup and performance summary
Figure 18. Device current consumption vs. input voltage
STANDBY MODE INPUT BATTERY CURRENT
184
vs INPUT VOLTAGE
182
180
178
176
174
172
8
10 12 14 16 18 20 22 24 26 28
INPUT VOLTAGE [V]
10.6
Switching frequency vs. load current
Figure 19 and Figure 20 show the switching frequency variation with the load current in
PWM mode, skip mode and no-audible skip mode. 12 V is applied at the V_IN+ and V_IN- test
points.
Figure 19. 1.5 V output switching frequency vs. load current
1.5V SWITCHING FREQUENCY
250
vs LOAD CURRENT
PWM
200
150
100
50
NO AUD. SKIP
0
SKIP
0.01
0.1
1
10
LOAD CURRENT [A]
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