ir3831 International Rectifier Corp., ir3831 Datasheet - Page 23

• Manufacturer Part Number: ir3831
• Description: Synchronous Buck Regulator For Ddr Applications
• Manufacturer: International Rectifier Corp.

02/20/09
TYPICAL OPERATING WAVEFORMS
Vin=12.0V, Vcc=5V, Vo=0.75V, Io=0- ±8A, Room Temperature, No Air Flow
Fig. 18: Inductor node at 8A, sourcing
Fig. 20: Output Voltage Ripple, 8A,
Fig. 16: Start up at 8A, sourcing
current Ch
sourcing current, Ch
current, Ch
Ch
3
:SS, Ch
1
:V
3
:SW, Ch
out
4
, Ch
:PGood
2
2
:V
: V
4
:I
DDQ
out
out
,
Fig. 19: Inductor node at -3A, sinking
Fig. 21: Short (Hiccup) Recovery
Fig. 17: Start up with Prebias, 0A
Load Ch
Ch
current, Ch
2
:V
out
1
, Ch
:V
out
3
, Ch
:V
3
IR3831MPbF
:SW , Ch
SS
2
:V
, Ch
DDQ,
4
:PGood
4
Ch
:I
out
3
:SS
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