IRDC3821A International Rectifier, IRDC3821A Datasheet - Page 8

• Manufacturer Part Number: IRDC3821A
• Description: BOARD EVAL SYNC BUCK CONVERTER
• Manufacturer: International Rectifier

TYPICAL OPERATING WAVEFORMS
Vin=Vcc=12.0V, Vo=1.8V, Io=0-9A, Room Temperature, No Air Flow
Rev 0.0
01/07/2008
Fig. 11: Inductor node voltage at 9A load
Fig. 9: Pre-Bias Start up, 0A Load
Ch
Vin
Fig.7: Start up into 9A Load
1
:V
Ch
in
, Ch
1
:V
Ch
in
2
, Ch
:V
1
:LX, Ch
SS
2
, Ch
:V
Vout
SS
Iout
3
, Ch
:V
4
:I
out
out
3
, Ch
:V
out
Vss
4
:I
out
Fig. 12: Shorted Hiccup Condition Recovery
Ch
Fig. 10: Output Voltage Ripple, 9A load
1
:V
Fig. 8: Start up into 9A Load,
Vin
in
, Ch
2
Ch
:V
Ch
SS
3
: V
2
:V
, Ch
out ,
SS
, Ch
Ch
3
IRDC3821A
Vout
:V
4
out
: I
3
out
:V
Vss
,
Ch
out
4
:V
PGood
8