Technical Specification
20
18
16
14
Input:
Output:
Current:
Package:
35-75 V
1.8 V
20 A
Eighth-brick
I
out
(A)
12
10
8
400 LFM (2.0 m/s)
6
4
2
0
0
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
50 LFM (0.25 m/s)
25
40
55
o
70
85
Ambient Air Temperature ( C)
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 50 LFM through 400 LFM with air flowing
from input to output (nominal input voltage).
Figure 8:
Thermal plot of converter at 20 amp load current 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) (4 ms/div).
Input voltage pre-applied. Ch 1: Vout (500mV/div). Ch 2: ON/OFF
input (5V/div)
Figure 10:
Turn-on transient at zero load (4 ms/div). Ch 1: Vout
(500mV/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/µ s). Load cap: 10µ F, 100 mW ESR tan-
talum cap and 1µ F ceramic cap. Ch 1: Vout (100mV/div), Ch 2: Iout (5A/div).
Product # PQ60018EGL20
Phone 1-888-567-9596
Figure 12
:
Output voltage response to step-change in load current (50%-
75%-50% of Iout(max): dI/dt = 5A/µ s). Load cap: 470µ F, 30 mW ESR tanta-
lum cap and 1µ F ceramic cap. Ch 1: Vout (100mV/div), Ch 2: Iout (5A/div).
Doc.# 005-2EG618G Rev. B
1/22/08
Page 6
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