Product # PQ60033EGx20

Phone 1-888-567-9596

www.synqor.com

Doc.# 005-0005349 Rev. A

09/23/09

Page 6

Input:

Output:

Current:

Package:

35-75 V

3.3 V

20 A

Eighth-brick

Technical Specification

0

2

4

6

8

10

12

14

16

18

20

0

25

40

55

70

85

Ambient Air Temperature (

400 LFM (2.0 m/s)

300 LFM (1.5 m/s)

200 LFM (1.0 m/s)

100 LFM (0.5 m/s)

50 LFM (0.25 m/s)

Figure 7: Maximum output power-derating curves vs. ambient air temperature

for airflow rates of 50 LFM through 400 LFM with air flowing from input to

output (nominal input voltage).

Figure 8: Thermal plot of converter at 17 amp load current (57W) with 55°C air

flowing at the rate of 200 LFM. Air is flowing across the converter from input to

output (nominal input voltage).

Figure 9: Turn-on transient at full load (resistive load) (10 ms/div). Input

voltage pre-applied. Ch 1: Vout (1V/div). Ch 2: ON/OFF input (5V/div)

Figure 10: Turn-on transient at zero load (10 ms/div). Ch 1: Vout (1V/div). Ch

2: ON/OFF input (5V/div).

Figure 11: Output voltage response to step-change in load current (50%-75%-

50% of Iout(max); dI/dt = 0.1A/µs). Load cap: 10µF, 100 mΩ ESR tantalum cap

and 1µF ceramic cap. Ch 1: Vout (100mV/div), Ch 2: Iout (5A/div).

Figure 12: Output voltage response to step-change in load current (50%-75%-

50% of Iout(max): dI/dt = 5A/µs). Load cap: 470µF, 30 mΩ ESR tantalum cap

and 1µF ceramic cap. Ch 1: Vout (100mV/div), Ch 2: Iout (5A/div).

Semiconductor junction temperature is

within 1°C of surface temperature