Electrical Characteristics: -55°C to +125°C Tc, 28 VDC Vin, 100% load, unless otherwise specified.

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.

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.

SINGLE OUTPUT MODELS

SMRT283R3S

SMRT2805S

UNITS

PARAMETER

CONDITIONS

MIN

TYP

MAX

MIN

TYP

MAX

OUTPUT VOLTAGE

3.23

3.30

3.37

4.90

5.00

5.10

VDC

—

—

6.97

0

—

6 . 0

A

0

—

23

0

—

30

W

OUTPUT RIPPLE

—

—

200

—

—

200

mV p-p

LINE REGULATION

—

5

3 0

—

5

3 0

mV

LOAD REGULATION

—

5

4 0

—

5

4 0

mV

TOTAL REGULATION

ALL CONDITIONS OF

LINE, LOAD, AGING,

TEMP AND RADIATION

3.0

—

3.6

4.7

—

5.3

CONTINUOUS

19

28

56

0

—

80

19

28

56

0

—

80

VDC

V

TRANSIENT 100 ms

INPUT CURRENT

—

—

50

—

—

110

—

—

50

—

—

110

mA

NO LOAD

10 kHz - 20 MHz

—

10

50

—

10

50

mA p-p

EFFICIENCY

65

—

—

66

—

—

%

LOAD FAULT

—

—

28

—

—

28

W

TRANSIENT

-450

—

450

—

—

3

-450

—

450

—

—

3

mV pk

ms

RECOVERY

TRANSIENT

-500

—

500

—

—

4

-500

—

500

—

—

4

mV pk

ms

RECOVERY

START-UP

NO LOAD AND FULL

—

—

35

—

—

50

—

—

25

—

—

50

ms

mV pk

UNCONDITIONALLY

STABLE, START-UP

DELAY INCREASED

TC = 25°C

—

—

5000

—

—

5000

μF

Crane Aerospace & Electronics Power Solutions

www.craneae.com

Page 7 of 17

Rev B – 20080213

SMRT Single, Dual and Triple DC/DC Converters

28 VOLT INPUT – 35 WATT