mc33680ftb ON Semiconductor, mc33680ftb Datasheet - Page 11

• Manufacturer Part Number: mc33680ftb
• Description: Dual Dc-dc Regulator For Electronic Organizer
• Manufacturer: ON Semiconductor

Loading Current, I
Loading Current, I
VMAIN Zoom−In
VMAIN Zoom−In
Coil Current
Feedback Voltage
Coil Current
V@SW
VMAIN
Feedback Voltage
VREF
LOAD
V@SW
VMAIN
VREF
LOAD
VMAIN + 1 V
t
dl
I
t
pk
dl
M2 OFF
M1 ON
M2 OFF
VMAIN + 1 V
M1 ON
I
pk
Figure 20. Waveforms of Discontinuous Conduction Mode
Figure 19. Waveforms of Continuous Conduction Mode
t
dh
t
dh
M1 OFF
0 V
M1 OFF
M2 ON
0 V
Cycle Starts
Cycle Starts
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M2 OFF
M1 ON
11
T
M2 OFF
ON
V
T
M1 ON
ON
IN
T
SW
M1 OFF
T
M2 ON
SW
M1 OFF
M2 OFF
M1 ON
M2 OFF
M1 ON
M1 OFF
M1 OFF
M2 ON