FSDM07652RB Fairchild Semiconductor, FSDM07652RB Datasheet - Page 13

• Manufacturer Part Number: FSDM07652RB
• Description: SMPS Power Switch, Built-in Soft Start Improved (Green)
• Manufacturer: Fairchild Semiconductor

5. Burst operation : In order to minimize power dissipation
in standby mode, the FSDM07652RB enters burst mode
operation.
decreases. As shown in Figure 8, the device automatically
enters burst mode when the feedback voltage drops below
V
output voltages start to drop at a rate dependent on standby
current load. This causes the feedback voltage to rise. Once
it passes V
voltage then falls and the process repeats. Burst mode
operation alternately enables and disables switching of the
power Sense FET thereby reducing switching loss in
Standby mode.
BURL
Vds
V
0.5V
Ids
0.7V
Vo
Vo
FB
set
(500mV). At this point switching stops and the
Figure 8. Waveforms of burst operation
BURH
As the load decreases, the feedback voltage
(700mV) switching resumes. The feedback
T1
Switching
disabled
T2 T3
Switching
disabled
T4
time
FSDM07652RB
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