
Electrical Characteristics: -55°C to +125°C TC, 28 VDC Vin, 100% load, unless otherwise specified.
DUAL OUTPUT MODELS
SMRT2805D
SMRT2812D
SMRT2815D
unItS
parameter
COnDItIOnS
MIn
TYP
MAX
MIn
TYP
MAX
MIn
TYP
MAX
Output VOltage
VOut a
4.90
5.00
5.10 11.76 12.00 12.24 14.70 15.00 15.30
VDC
VOut b
4.90
5.00
5.10 11.76 12.00 12.24 14.70 15.00 15.30
Output Current 2, 3
VOut a
—
3.0
—
1.46
—
1.17
VOut b
—
3.0
—
1.46
—
1.17
A
Output pOwer 2, 3
VIn = 19 tO 56 VDC
VOut a
0
—
15
0
—
17.5
0
—
17.5
W
VOut b
0
—
15
0
—
17.5
0
—
17.5
Output rIpple
10 khz - 20 mhz
—
200
—
200
—
180
mV p-p
lIne regulatIOn 2
VIn = 19, 50 VDC
—
30
—
5
25
—
5
30
mV
lOaD regulatIOn
—
5
40
—
5
50
—
5
40
mV
VIn = 19, 50 VDC
—
70
—
100
—
70
tOtal regulatIOn 1
VOUT
all COnDItIOnS OF
lIne, lOaD, agIng,
temp anD raDIatIOn
±4.6
—
±5.4
±10.9
—
±13.1 ±14.0
—
±16.0
VDC
Input VOltage 4
COntInuOuS
19
28
56
19
28
56
19
28
56
VDC
tranSIent 120 ms
0
—
80
0
—
80
0
—
80
V
Input Current
InhIbIteD 4
—
50
—
50
—
50
mA
nO lOaD
—
110
—
110
—
110
Input rIpple
Current 4
10 kHz - 20 MHz
—
10
50
—
10
150
—
10
50
mA p-p
eFFICIenCy
66
—
75
—
75
—
%
lOaD Fault 5, 6
pOwer DISSIpatIOn
—
28
—
20
—
20
W
reCOVery 1
—
25
—
25
—
25
ms
Step lOaD
reSpOnSe 6, 7, 8
tranSIent
—
±450
—
±450
—
±575
mV pk
reCOVery
—
3
—
2
—
3
ms
Step lIne
reSpOnSe 1, 6, 7
19 - 50 - 19 VIn
tranSIent
—
±500
—
±1000
—
±700
mv pk
reCOVery
—
4
—
3
—
4
ms
Start-up 9
Delay
nO lOaD anD Full
—
25
—
20
—
25
ms
OVerShOOt
—
50
—
350
—
150
mV pk
CapaCItIVe lOaD1
tC = 25°C
unCOnDItIOnally
Stable, Start-up
Delay InCreaSeD
—
5000
—
5000
—
5000
F
notes
1. guaranteed by design, not tested.
2. The specified maximum current/power is available from each output.
3. To maintain tight regulation over the full input voltage range a minimum load of 2% of full load should be used on all outputs.
4. Converters meet MIL-STD-461 specification revisions for conducted emissions C-CE03 and D-/E-/F-CE-102. The actual value of input ripple current is much less, the
limit in the characteristic table is based on measurement resolution..
5. Maximum power dissipation when output is shorted.
6. Recovery time is measured from application of the transient to point at which VOUT is within 1% of VOUT at final value.
7. Transition time >10 s.
8. Half load to/from full load.
9. Measured from release of inhibit or input voltage step
Crane Aerospace & Electronics Power Solutions
www.craneae.com/interpoint
Page 12 of 22
sMrt28 single, Dual and triple space Dc/Dc converters
28 VOLt Input – 35 Watt – space quaLIFIeD
SMRT28 Rev F - 2011.01.24