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SQM48T/S20 DC-DC Converter Data Sheet
36-75 VDC Input; 1.2-3.3 VDC @ 20A Outputs
Electrical Specifications: SQM48T/S20015 (1.5 Volt Out)
Conditions: T A =25 oC, Airflow=300 LFM (1.5 m/s), Vin=48 VDC, Vout=1.5 VDC, unless otherwise specified.
P arameter
N otes
M in
T yp
M ax
U nits
Input Characteristics
20 ADC, 1.5 VDC Out @ 36 VDC
Maximum Input Current
Input Stand-by Current
Input No Load Current (0 load on the output)
Input Reflected-Ripple Current
Input Voltage Ripple Rejection
In
Vin = 48 V, converter disabled
Vin = 48 V, converter enabled
25 MHz bandwidth
120 Hz
3
27
6
TBD
1.0
ADC
mADC
mADC
mA PK-PK
dB
Output Characteristics
Output Voltage Set Point (no load)
-40 oC to 85 oC
1.485
1.500
1.515
VDC
Output Regulation
Over Line
Over Load
±2
±2
±4
±4
mV
mV
Output Voltage Range
Over line, load and temperature 2
1.477
1.523
VDC
Output Ripple and Noise - 25 MHz
Full load + 10 μ F tantalum + 1 μ F
bandwidth
External Load Capacitance
Output Current Range
ceramic
Plus full load (resistive)
0
30
50
20,000
20
mV PK-PK
μ F
ADC
Current Limit Inception
Peak Short-Circuit Current
RMS Short-Circuit Current
Non-latching
Non-latching. Short=10m ? .
Non-latching
21
24
30
27.5
44
6.7
ADC
A
Arms
Dynamic Response
Load Change 25% of Iout Max, di/dt = 0.1A/ μ s Co = 1 μ F ceramic
80
mV
Settling Time to 1%
di/dt = 5A/ μ s
Co = 450 μ F POS + 1 μ F ceramic
140
100
mV
μs
Efficiency
100% Load
50% Load
Additional Notes: 2. -40oC to 85oC.
25
20
15
500 LFM (2.5 m/s)
10
400 LFM (2.0 m/s)
0.95
0.90
0.85
0.80
84.5
86.5
%
%
5
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
30 LFM (0.15 m/s)
0.75
0.70
72 V
48 V
36 V
0
20
30
40
50
60
70
80
90
0.65
0
5
10
15
20
25
Ambient Temperature [°C]
Fig. 1.5V.1: Available load current vs. ambient air
temperature and airflow rates for SQM48T20015 converter
with D height pins mounted vertically with air flowing from
pin 3 to pin 1, MOSFET temperature ? 120 ? C, Vin = 48 V.
Load Current [Adc]
Fig. 1.5V.2: Efficiency vs. load current and input voltage for
SQM48T/S20015 converter mounted vertically with air
flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s) and
Ta = 25 ? C.
MCD10208 Rev. 1.0, 08-Jul-10
Page 24 of 33
www.power-one.com
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