3
SMSA SERIES
5 WATT
DC/DC CONVERTERS
Electrical Characteristics: 25°C Tc, 28 VDC Vin, 100% load, radiation level O, unless otherwise specified.
Notes
1. Up to 4 watts (80% of full power) is available from either output providing the
opposite output is carrying 20% of total power.
2. Shows regulation effect on the minus output during the defined cross loading
conditions, with 80% and 20% referring to the total output power of the
converter. See Figures 15 and 16.
3. Indefinite short circuit protection not guaranteed above 125°C (case).
4. Recovery time is measured from application of the transient to point at which
VOUT is within 1% of VOUT at final value.
5. Guaranteed but not tested.
DUAL OUTPUT MODELS
SMSA 2805D
SMSA2812D
SMSA2815D
PARAMETER
CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
OUTPUT VOLTAGE
+VOUT
4.95
5.00
5.05
11.88
12.00
12.12
14.85
15.00
15.15
VDC
–VOUT
4.9
5.0
5.1
11.76
12.00
12.24
14.70
15.00
15.30
OUTPUT CURRENT1
VIN = 16 to 40 VDC
Tc = –55°C to +125°C
—
±500
800
—
±208
333
—
±167
267
mA
OUTPUT POWER1
VIN = 16 to 40 VDC
Tc = –55°C to +125°C
—
5
—
5
—
5
W
OUTPUT RIPPLE VOLT.
10 kHz - 2 MHz
—
300
—
80
300
—
120
300
mV p-p
LINE REGULATION
Vin = 16 to 40 VDC
Tc = –55°C to +125°C
+VOUT
—
20
100
—
20
100
—
10
50
mV
–VOUT
—
40
200
—
40
200
—
40
180
LOAD REGULATION
NO LOAD TO FULL
Tc = –55°C to +125°C
+VOUT
—
10
120
—
10
120
—
10
50
mV
–VOUT
—
100
400
—
100
400
—
50
200
CROSS REGULATION2
+PO = 30 - 70 %, –PO =70 - 30%
—
5
8
—
3.7
6
—
3
6
%
–PO = 30 - 70 %, +PO = 70 - 30%
INPUT VOLTAGE
NO LOAD TO FULL
CONTINUOUS
16
28
40
16
28
40
16
28
40
VDC
TRANSIENT5 50 msec
—
50
—
50
—
50
V
INPUT CURRENT
NO LOAD
—
30
50
—
40
63
—
38
60
FULL LOAD
—
248
—
235
—
235
—
mA
INHIBITED
—
3
5
—
3
5
—
3
5
INPUT RIPPLE
10 kHz TO 10 MHz
—
50
200
—
50
200
—
50
200
CURRENT
Tc = –55°C to +125°C
—
60
300
—
60
300
—
60
300
mA p-p
EFFICIENCY
65
70
—
67
73
—
68
73
—
%
LOAD FAULT3, 4
POWER DISSIPATION
SHORT CIRCUIT
—
1.3
1.8
—
1.3
1.7
—
1.3
1.6
W
RECOVERY
—
50
—
1
30
—
1
50
ms
STEP LOAD
50% - 100% - 50% BALANCED
RESPONSE
TRANSIENT
—
±200
±550
—
±200
±550
—
±220
±600
mV
RECOVERY4, 5
—
200
500
—
200
500
—
200
500
s
STEP LINE RESP.4, 5
TRANSIENT
16 TO 40 VDC
—
±200
±500
—
±200
±500
—
±600
±1500
40 TO 16 VDC
—
±200
±500
—
±200
±500
—
±600
±1500
mV pk
RECOVERY
16 TO 40 VDC
—
300
750
—
300
750
—
500
1200
40 TO 16 VDC
—
800
2000
—
800
2000
—
500
1200
s
START-UP
DELAY
—
10
30
—
10
30
—
10
25
ms
OVERSHOOT5
—
0
500
—
0
500
—
0
500
mV pk