Efficiency and Load Regulation
Performance
Unless otherwise indicated, VIN = 12 V, VOUT1 = 5 V, VOUT2 = 3.3
V, IOUT1 = 3 A, IOUT2 = 3 A and f
SW = 1 MHz.
Figure 8-2 Efficiency, VOUT = 5
V
Figure 8-4 Load Regulation, VOUT = 5
V, PFM Mode
Figure 8-3 Efficiency, VOUT = 3.3
V
Figure 8-5 Load Regulation, VOUT =
3.3 V, PFM ModeWaveforms and Plots
Figure 8-6 Start-up and Shut-down,
VOUT1 = 5 V
Figure 8-8 Enable ON and OFF, VOUT1 =
5 V
| VOUT1 = 5 V, IOUT1 = 1.5 A
to 3 A at 1 A/µs |
Figure 8-10 Load Transient Rising
(CH1)
| VOUT2 = 3.3 V, IOUT2 = 3 A
to 6 A at 1 A/µs |
Figure 8-12 Load Transient Rising
(CH2)
Figure 8-14 Bode Plot (CH1)
Figure 8-7 Start-up and Shut-down,
VOUT2 = 3.3 V
Figure 8-9 Enable ON and OFF, VOUT2 =
3.3 V
| VOUT1 = 5 V, IOUT1 = 3 A to
1.5 A at 1 A/µs |
Figure 8-11 Load Transient Falling
(CH1)
| VOUT2 = 3.3 V, IOUT2 = 6 A
to 3 A at 1 A/µs |
Figure 8-13 Load Transient Falling
(CH2)
Figure 8-15 Bode Plot (CH2)Thermal Performance
| VOUT1 = 5 V,
VOUT2 = 3.3 V, IOUT1 = 3 A, IOUT2 = 3 A,
FSW = 1 MHz |
Figure 8-16 Infrared Thermal Image:
VIN = 12 V
| VOUT1 = 5 V,
VOUT2 = 3.3 V, IOUT1 = 3 A, IOUT2 = 3 A,
FSW = 1 MHz |
Figure 8-17 Infrared Thermal Image:
VIN = 36 VEMI Performance
| VOUT1 = 5 V,
VOUT2 = 3.3 V, IOUT1 = 3 A,
IOUT2 = 3 A, FSW = 1
MHz |
Figure 8-18 CISPR 11/32 Class B
Conducted Emissions: VIN = 12 V
| VOUT = 5 V,
VOUT2 = 3.3 V, IOUT1 = 3 A,
IOUT2 = 3 A, FSW = 1
MHz |
Figure 8-20 CISPR 11/32 Class B
Radiated Emissions: VIN = 24 V
| VOUT = 5 V,
VOUT2 = 3.3 V, IOUT1 = 3 A,
IOUT2 = 3 A, FSW = 1
MHz |
Figure 8-19 CISPR 11/32 Class B
Conducted Emissions: VIN = 24 V