Technical Specification
Input:
Output:
Current:
Part no.:
18-75 V
1.8 V
40 A
IQ36018QTC40
IQ36018QTC40 eleCTRICal ChaRaCTeRISTICS (1.8 V
OUT
)
T
A
= 25 °C, airflow rate = 300 LFM, V
IN
= 36 V
DC
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.
InPUT ChaRaCTeRISTICS
Maximum Input Current
No-Load Input Current
Disabled Input Current
Response to Input Transient
Input Terminal Ripple Current
Recommended Input Fuse
Input Filter Component Values (L\C)
OUTPUT ChaRaCTeRISTICS
Output Voltage Set Point
Output Voltage Regulation
Over Line
Over Load
Over Temperature
Total Output Voltage Range
Output Voltage Ripple and Noise
1
Peak-to-Peak
RMS
Operating Output Current Range
Output DC Current-Limit Inception
Output DC Current-Limit Shutdown Voltage
Back-Drive Current Limit while Enabled
Back-Drive Current Limit while Disabled
Maximum Output Capacitance
Output Voltage during Load Current Transient
For a Step Change in Output Current (0.2 A/µs)
Settling Time
Output Voltage Trim Range
Output Voltage Remote Sense Range
Output Over-Voltage Protection
Load Current Scale Factor
eFFICIenCy
100% Load
50% Load
Parameter
Min.
1.782
-27
1.755
0
44
0
-20
117
Typ.
75
2.0
0.09
260
1.0\6.6
1.800
+0.1
+0.1
85
15
48
0.6
1.2
16
70
100
122
700
84
86
Max.
6.3
90
4.0
20
1.818
+0.3
+0.3
27
1.845
170
30
40
52
50
10,000
+10
+10
127
Units notes & Conditions
A
mA
mA
V
mA
A
µH\µF
V
%
%
mV
V
mV
mV
A
A
V
A
mA
µF
mV
µs
%
%
%
%
%
18 V
IN
; trim up; in current limit
1000 V/ms input transient; 100 µF output cap.
RMS
Fast acting external fuse recommended
Internal values; see Figure E
Over sample, line, load, temperature & life
20 MHz bandwidth
Full Load
Full Load
Subject to thermal derating
Output Voltage 10% Low
Negative current drawn from output
Negative current drawn from output
Vout nominal at full load (resistive load)
50% to 75% to 50% I
OUT
max
To within 1% V
OUT
nom
Measured across Pins 8 & 4; Common Figure 3
Measured across Pins 8 & 4
Over full temp range; % of nominal V
OUT
See Output Load Current app. note on our web
See Figure 1 for efficiency curve
See Figure 1 for 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)
Product # IQ36xxxQTCxx
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-IQ36QTX Rev. B
09/23/08
Page 6
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