Product # DQ63318QMA04

Phone 1-888-567-9596

Doc.# 005-2DQ638H Rev. A

1/10/03

Page 6

Performance Curves

48Vin 3.3/1.8Vout 40W

Quarter

Quarter

Brick Dual

Brick Dual

1.7

1.72

1.74

1.76

1.78

1.8

1.82

1.84

1.86

1.88

1.9

3.2

3.22

3.24

3.26

3.28

3.3

3.32

3.34

3.36

3.38

3.4

1.8V_48Vin

3.3V_48Vin

1.7

1.72

1.74

1.76

1.78

1.8

1.82

1.84

1.86

1.88

1.9

13.3/0

11/1.3

9/2.4

7/3.5

5/4.5

3/5.6

1/6.7

0/7.3

3.2

3.22

3.24

3.26

3.28

3.3

3.32

3.34

3.36

3.38

3.4

1.8V_48Vin

3.3V_48Vin

Figure 7: Load regulation vs. load current with power fixed at full load

(40W) and load currents split as shown between 1.8V and 3.3V outputs,

at nominal input voltage.

Figure 8: Load regulation vs. load current with power fixed at 60%

load (24W) and load currents split as shown between 1.8V and 3.3V

outputs, at nominal input voltage.

Figure 9: Load regulation vs. output power from 5W load to full load

with 75% load on 1.8V output and 25% load on 3.3V output at nominal

input voltage.

Figure 10: . Load regulation vs. output power from 4.4W load to full

load with 25% load on 1.8V output and 75% load on 3.3V output at

nominal input voltage.

1.7

1.72

1.74

1.76

1.78

1.8

1.82

1.84

1.86

1.88

1.9

5.0

10.0

15.0

20.0

25.0

30.0

35.0

40.0

Total Output Power (W)

3.2

3.22

3.24

3.26

3.28

3.3

3.32

3.34

3.36

3.38

3.4

1.8V_48Vin

3.3V_48Vin

perature for airflow rates of 0 to 400 LFM, air flowing from pin 1 to pin

3. Full load (22A) on 1.8V output and no load on 3.3V output.

1.7

1.72

1.74

1.76

1.78

1.8

1.82

1.84

1.86

1.88

1.9

4.4

9

13.3

17.7

22

26.5

31

35

40

Total Output Power (W)

3.2

3.22

3.24

3.26

3.28

3.3

3.32

3.34

3.36

3.38

3.4

1.8V_48Vin

3.3V_48Vin

across the converter is from pin 1 to pin 3 (nominal input voltage)

0

2

4

6

8

10

12

14

16

18

20

22

0

2540

5570

85

400 LFM (2.0 m/s)

300 LFM (1.5 m/s)

200 LFM (1.0 m/s)

100 LFM (0.5 m/s)

0 LFM (0 m/s)

Semiconductor junction temperature is

within 1

°C of surface temperature

Input voltage effects cross regu-

lation by maximum of 9mV

Input voltage effects cross regu-

lation by maximum of 2mV

Input voltage effects cross regu-

lation by maximum of 2mV

Input voltage effects cross regu-

lation by maximum of 2mV