Input: 9-36 V
Output: 1.8 V
Current: 40 A
Part ꢀo.: IQ18018QTC40
Technical Specification
100
95
90
85
80
75
70
65
60
18
16
14
12
10
8
6
9 Vin
9 Vin
4
18 Vin
36 Vin
18 Vin
36 Vin
2
0
0
5
10
15
20
25
30
35
40
0
5
10
15
20
25
30
35
40
Load Current (A)
Load Current (A)
Figure 1: Efficiency at nominal output voltage vs. load current for
Figure 2: Power dissipation at nominal output voltage vs. load current
minimum, nominal, and maximum input voltage at 25
°C.
for minimum, nominal, and maximum input voltage at 25°C.
50
45
40
35
30
25
20
50
45
40
35
30
25
20
15
10
5
15
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
10
200 LFM (1.0 m/s)
5
100 LFM (0.5 m/s)
0
0
0
25
40
55
70
85
0
25
40
55
70
85
Ambient Air Temperature (°C)
Ambient Air Temperature (°C)
Figure 3: Encased converter (without heatsink) max. output power derating vs.
ambient air temperature for airflow rates of 100 LFM through 400 LFM. Air flows
across the converter from pin 3 to pin 1 (nominal input voltage).
Figure 4: Encased converter (with 1/4” heatsink) max. output power derating vs.
ambient air temperature for airflow rates of 100 LFM through 400 LFM. Air flows
across the converter from pin 3 to pin 1 (nominal input voltage).
Figure 5: Output voltage response to step-change in load current (50%-75%-
Figure 6: Output voltage response to step-change in input voltage
50% of Iout(max); dI/dt = 0.2 A/µs). Load cap: 1
µF ceramic and 15
µF tantalum
(300 V/ms). Load cap: 100 µF, electrolytic output capacitance. Ch 1: Vout
capacitors. Ch 1: Vout (200 mV/div), Ch 2: Iout (10 A/div).
(200 mV/div), Ch 2: Vin (10 V/div).
Product # IQ18xxxQTCxx
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-IQ18QTX Rev. B
09/23/08
Page 7
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