Product # IQ36xxxQTCxx Phone 1-888-567-9596 www.synqor.com Doc.# 005-IQ36QTX Rev. A 06/06/08 Page 16
Technical Specification
Input:
Output:
Current:
Part no.:
18-75 V
15 V
8.0 A
IQ36150QTC08
Parameter Min. Typ. Max. Units notes & Conditions
InPUT ChARACTeRISTICS
MaximumInputCurrent 9.7 A 18V
IN
;trimup;incurrentlimit
No-LoadInputCurrent 90 110 mA
DisabledInputCurrent 2.0 4.0 mA
ResponsetoInputTransient 0.55 V 1000V/msinputtransient;100µFoutputcap.
InputTerminalRippleCurrent 310 mA RMS
RecommendedInputFuse 20 A Fastactingexternalfuserecommended
InputFilterComponentValues(L\C) 1.0\6.6 µH\µF Internalvalues;seeFigureE
OUTPUT ChARACTeRISTICS
OutputVoltageSetPoint 14.85 15.00 15.15 V
OutputVoltageRegulation
OverLine +0.1 +0.3 %
OverLoad +0.1 +0.3 %
OverTemperature -225 225 mV
TotalOutputVoltageRange 14.625 15.375 V Oversample,line,load,temperature&life
OutputVoltageRippleandNoise1 20MHzbandwidth
Peak-to-Peak 75 110 mV FullLoad
RMS 15 30 mV FullLoad
OperatingOutputCurrentRange 0 8.0 A Subjecttothermalderating
OutputDCCurrent-LimitInception 8.8 9.6 10.4 A OutputVoltage10%Low
OutputDCCurrent-LimitShutdownVoltage 6.4 V
Back-DriveCurrentLimitwhileEnabled 0.25 A Negativecurrentdrawnfromoutput
Back-DriveCurrentLimitwhileDisabled 0 16 50 mA Negativecurrentdrawnfromoutput
MaximumOutputCapacitance 1000 µF Voutnominalatfullload(resistiveload)
OutputVoltageduringLoadCurrentTransient
ForaStepChangeinOutputCurrent(0.1A/µs) 570 mV 50%to75%to50%I
OUT
max
SettlingTime 50 µs Towithin1%V
OUT
nom
OutputVoltageTrimRange -20 +10 % MeasuredacrossPins8&4;CommonFigure3
OutputVoltageRemoteSenseRange +10 % MeasuredacrossPins8&4
OutputOver-VoltageProtection 117 122 127 % Overfulltemprange;%ofnominalV
OUT
LoadCurrentScaleFactor 100 SeeOutputLoadCurrentapp.noteonourweb
eFFICIenCy
100%Load 91 % SeeFigure1forefficiencycurve
50%Load 92 % SeeFigure1forefficiencycurve
note 1:Outputisterminatedwith1µFceramicand15µFlow-ESRtantalumcapacitors.

Forapplicationsrequiringreducedoutputvoltagerippleandnoise,consultSynQorapplicationssupport(e-mail:support@synqor.com)
IQ36150QTC08 eleCTRICAl ChARACTeRISTICS (15 VOUT)
TA=25°C,airflowrate=300LFM,VIN=36VDCunlessotherwisenoted;fulloperatingtemperaturerangeis-40°Cto+100°C
ambienttemperaturewithappropriatepowerderating.
Specificationssubjecttochangewithoutnotice.
Product # IQ36xxxQTCxx Phone 1-888-567-9596 www.synqor.com Doc.# 005-IQ36QTX Rev. A 06/06/08 Page 17
Technical Specification
Input:
Output:
Current:
Part no.:
18-75 V
15 V
8.0 A
IQ36150QTC08
0
2
4
6
8
10
12
14
16
0 1 2 3 4 5 6 7 8
Load Current (A)
Power Dissipation (W)
18 Vin
36 Vin
75 Vin
60
65
70
75
80
85
90
95
100
012345678
Load Current (A)
Efficiency (%)
18 Vin
36 Vin
75 Vin
Figure 1: Efficiency at nominal output voltage vs. load current for
minimum, nominal, and maximum input voltage at 25
°
C. Figure 2: Power dissipation at nominal output voltage vs. load current
for minimum, nominal, and maximum input voltage at 25
°
C.
Ambient Air Temperature (°C)
Iout (A)
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
1
2
3
4
5
6
7
8
9
025 40 55 70 85
Ambient Air Temperature (°C)
Iout (A)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
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%-
50% of Iout(max); dI/dt = 0.1 A/
µ
s). Load cap: 1
µ
F ceramic and 15
µ
F tantalum
capacitors. Ch 1: Vout (1 V/div), Ch 2: Iout (2.5 A/div).
Figure 6: Output voltage response to step-change in input voltage
(250 V/ms). Load cap: 100
µ
F, electrolytic output capacitance. Ch 1: Vout
(500 mV/div), Ch 2: Vin (20 V/div).