Input:
Output:
35-75 V
1.8 V
Current:
Package:
40 A
Quarter-brick
Technical Specification
40
35
30
25
20
15
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
10
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
0 LFM (0 m/s)
5
0
0
25
40
55
70
85
Ambient Air Temperature (oC)
Semiconductor junction temperature is
within 1 C of surface temperature
°
Figure 7: Maximum output power derating curves vs. ambient air tem-
perature for airflow rates of 0 LFM through 400 LFM with air flowing
lengthwise from output to input (nominal input voltage).
Figure 8: Thermal plot of converter at 40 amp load current with 55°C
air flowing at the rate of 200 LFM. Air is flowing lengthwise from out-
put to input (nominal input voltage).
Figure 9: Turn-on transient at full rated load (resistive load) (2
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 current (2 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%-
Figure 12: Output voltage response to step-change in load current (50%-75%-
50% of Iout(max); dI/dt = 0.1A/
µ
s). Load cap: 10
µ
F, 100 m
Ω
ESR tantalum capac-
50% of Iout(max): dI/dt = 1A/
µs). Load cap: 470µF, 30 mΩ ESR tantalum
itor and 1 F ceramic capacitor. Ch 1: Vout (100mV/div), Ch 2: Iout (10A/div).
µ
capacitor and 1 F ceramic cap. Ch 1: Vout (100mV/div), Ch 2: Iout (10A/div).
µ
Product # PQ60018QTA40
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2QT618C Rev. C
09/08/05
Page 6
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