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IQ18-HPC Datasheet PDF : 28 Pages
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Technical Specification
Input: 9 - 36 V
Output: 3.3 V
Current: 50 A
Part No.: IQ18033HPC50
IQ18033HPC50 Electrical Characteristics (3.3 Vout)
Ta = 25 °C, airflow rate = 300 LFM, Vin = 18 V dc unless otherwise noted; full operating temperature range is -40 °C to +100 °C baseplate temperature with
appropriate power derating. Specifications subject to change without notice.
Parameter
Min. Typ. Max. Units Notes & Conditions
INPUT CHARACTERISTICS
Maximum Input Current
28.0
A Vin min; trim up; in current limit
No-Load Input Current
210
260
mA
Disabled Input Current
3
4
mA
Response to Input Transient
0.16
V 500 V/ms; see Figure 6
Input Terminal Ripple Current
440
mA RMS
Recommended Input Fuse
3.0
A Fast acting external fuse recommended
OUTPUT CHARACTERISTICS
Output Voltage Set Point
3.267
3.3
3.333
V
Output Voltage Regulation
Over Line
±0.1
±0.3
%
Over Load
±0.1
±0.3
%
Over Temperature
-50
50
mV
Total Output Voltage Range
3.218
3.383
V Over sample, line, load, temperature & life
Output Voltage Ripple and Noise
20 MHz bandwidth; see Note 1
Peak-to-Peak
0
80
160
mV Full load
RMS
12
20
mV Full load
Operating Output Current Range
0
50
A Subject to thermal derating
Output DC Current-Limit Inception
55.0
60.0
65.0
A Output voltage 10% Low
Output DC Current-Limit Shutdown Voltage
1.8
V
Back-Drive Current Limit while Enabled
1.5
A Negative current drawn from output
Back-Drive Current Limit while Disabled
0.1
mA Negative current drawn from output
Maximum Output Capacitance
10,000
µF Vout nominal at full load (resistive load)
Output Voltage during Load Current Transient
Step Change in Output Current (0.1 A/µs)
120
mV 50% to 75% to 50% Iout max
Settling Time
200
µs To within 1% Vout nom
Output Voltage Trim Range
-20
10
% Across Pins 8&4; Common Figures 3-5; see Note 2
Output Voltage Remote Sense Range
10
% Across Pins 8&4
Output Over-Voltage Protection
3.9
4.0
4.2
V Over full temp range
EFFICIENCY
100% Load
86
% See Figure 1 for efficiency curve
50% Load
89
% 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, consu
SynQor applications support (e-mail: support@synqor.com)
Product # IQ18xxxHPCxx
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-005029 Rev. B
04/13/09
Page 8
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