FSDM0465RE_07 FAIRCHILD [Fairchild Semiconductor], FSDM0465RE_07 Datasheet - Page 14

• Manufacturer Part Number: FSDM0465RE_07
• Manufacturer: FAIRCHILD [Fairchild Semiconductor]

FSDM0465RE, FSDM0565RE, FSDM07652RE Rev. 1.0.2
© 2006 Fairchild Semiconductor Corporation
5. Burst Operation: To minimize power dissipation in
standby mode, the FSDM0x65RE enters burst-mode
operation. As the load decreases, the feedback voltage
decreases. As shown in Figure 21, the device
automatically enters burst mode when the feedback
voltage drops below V
switching stops and the output voltages start to drop at a
rate dependent on standby current load. This causes the
feedback voltage to rise. Once it passes V
switching resumes. The feedback voltage then falls and
the process repeats. Burst-mode operation alternately
enables and disables switching of the power SenseFET,
thereby reducing switching loss in standby mode.
FSDM0565RE Rev: 00
V
V
V
0.7V
0.5V
I
Vo
DS
DS
FB
O
set
Figure 21. Waveforms of Burst Operation
T1
Switching
disabled
BURL
T2 T3
(500mV). At this point,
Switching
disabled
BURH
T4
(700mV),
time
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