Crane Aerospace & Electronics Power Solutions
SMRT Single, Dual and Triple DC/DC Converters
28 VOLT INPUT – 35 WATT
Electrical Characteristics: -55°C to +125°C Tc, 28 VDC Vin, 100% load, unless otherwise specified.
SINGLE OUTPUT MODELS
SMRT283R3S
SMRT2805S
UNITS
PARAMETER
CONDITIONS
MIN
3.23
—
TYP
3.30
—
MAX MIN
3.37 4.90
TYP
5.00
—
MAX
5.10
6.0
30
OUTPUT VOLTAGE
OUTPUT CURRENT
VDC
A
4
6.97
23
0
4
OUTPUT POWER
VIN = 19 TO 56 VDC
10 KHZ - 20 MHZ
0
—
0
—
W
OUTPUT RIPPLE
—
—
200
30
—
—
—
—
200
30
mV p-p
mV
LINE REGULATION
VIN = 19, 28, 50 VDC
—
5
5
LOAD REGULATION
TOTAL REGULATION
—
5
40
5
40
mV
ALL CONDITIONS OF
LINE, LOAD, AGING,
TEMP AND RADIATION
3.0
—
3.6 4.7
—
5.3
VOUT
6, 7
INPUT VOLTAGE
CONTINUOUS
19
0
28
—
—
—
10
—
—
—
—
—
56 19
28
—
—
—
10
—
—
—
—
—
56
80
VDC
V
TRANSIENT 100 ms
80
50
0
6
INPUT CURRENT
INHIBITED
—
—
—
—
66
—
50
mA
NO LOAD
—
110
50
110
50
8
INPUT RIPPLE CURRENT
EFFICIENCY
10 kHz - 20 MHz
—
mA p-p
%
65
—
—
—
2
LOAD FAULT
POWER DISSIPATION
28
28
W
5
STEP LOAD RESPONSE
TRANSIENT
RECOVERY
-450
—
450 -450
450
3
mV pk
ms
3
—
1
STEP LINE RESPONSE
19 - 56 - 19 VIN
TRANSIENT
-500
500 -500
500
mV pk
RECOVERY
—
—
4
—
—
4
ms
3
START-UP
DELAY
NO LOAD AND FULL
—
—
—
—
35
50
—
—
—
—
25
50
ms
3
OVERSHOOT
mV pk
1
CAPACITIVE LOAD
UNCONDITIONALLY
STABLE, START-UP
DELAY INCREASED
TC = 25°C
—
—
5000
—
—
5000
ꢀF
Notes
1. Guaranteed by design, not tested.
2. Maximum power dissipation when output is shorted.
3. Measured from release of inhibit or input voltage step.
4. Minimum value pre-load on all outputs of 2% of full load should be used on all outputs at TID of 100k rads(Si) and greater to ensure tight regulation
over full input voltage range.
5. Half load to/from full load; Transition time ≥ 10 μs.
6. Converter should not be inhibited or operated below 19 Vin above 5x10 rads (Si) total dose.
4
7. If 3.3S model is trimmed to the high end of its range, then minimum Vin = 22 V.
8. Converters meet MIL-STD-461 specification revisions for conducted emissions C-CE03 and D-/E-CE-102. The actual value of input ripple current
is much less, the limit in the characteristic table is based on measurement resolution.
www.craneae.com
Page 7 of 17
Rev B – 20080213
CRANE [ Crane Aerospace & Electronics. ]
