QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 1232
HIGH VOLTAGE 500mA 200kHz BUCK CONVERTER WITH BURST MODE
2
transient voltage suppressor diode can be added be-
tween VIN and GND terminals to absorb any high
voltage transient ringing that may occur due to hot-
plugging.
1.
After all connections are made with power off, turn
on input power and verify that the output voltage is
3.3V.
NOTE:
If the output voltage is low, disconnect the
load to make sure that it is not too high.
2.
Once the output voltage is established, adjust the
load within the operating range and observe the
output voltage regulation, ripple voltage, efficiency
and other parameters.
Figure 1.
DC1232A Typical Efficiency
Figure 2.
DC1232 Typical Supply Current in Burst Mode
Figure 3.
Output Ripple with Burst Mode Defeat. With Burst Mode
Enabled, zero load ripple may be as high as 30mV under the
same conditions.
