9 2
9 0
8 8
8 6
3 .3 5
3 .3 4
3 .3 3
3 .3 2
8 4
Vin=12V
Vout=3.3V
3 .3 1
Vin=12V
Vout=3.3V
3 .3 0
8 2
0 .5
1 .0
1 .5
2 .0
0 .0
0 .5
1 .0
L o a d C u r re n t (A )
1 .5
2 .0
L o a d
C u rre n t (A )
Figure 1. Efficiency vs Load
Vin=12V
Vout=3.3V
Vout
Iout (1A/div)
Figure 3. Load Step Response: 1->2A
Vout
Figure 2. Load Regulation
Vin=12V
Vout=3.3V
Vout
Iout (1A/div)
Figure 4. Load Step Response: 0->2A
Vout
Vin
SoftStart
Vin
SoftStart
Iout (1A/div)
Figure 5. Start-Up Response: No Load
Vout
Iout (1A/div)
Figure 6. Start-Up Response: 1A Load
Vin
SoftStart
SoftStart
Vout
Iout (1A/div)
Ichoke(10A/div)
Figure 7. Start-Up Response: 2A Load
3
Figure 8. Output Load Short Circuit
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