MSM SERIES
5 WATT
DC/DC CONVERTERS
TYPICAL CHARACTERISTICS
INHIBIT
ABSOLUTE MAXIMUM RATINGS
Output Voltage Temperature Coefficient
• 200 ppm/°C typical
Inhibit – TTL Open Collector
• Logic low (output disabled)
Input Voltage
• 16 to 40 VDC
Temperature Rise (Still Air)
• 18°C / watt dissipated, typical
Input to Output Capacitance
• 100 pF typical
Undervoltage Lockout
• 10 V input typical
Current Limit
• 160% of full load typical
Isolation
• 100 megohm minimum at 500 V
Conversion Frequency (kHz)
• 25°C, 200 min, 300 typ, 400 max
Inhibit Pin Voltage (unit enabled)
• 10 V, typical
• Inhibit pin current 0.34 mA typ
• Referenced to input common
• Logic high (output enabled) open collector
Output Power
• 5 W
Power Dissipation
• 1.9 W
Lead Soldering Temperature (10 sec per lead)
• 300°C
Storage Temperature Range (Base plate)
• –55°C to +130°C
RECOMMENDED OPERATING CONDITIONS
Input Voltage Range
• 16 to 40 VDC continuous
• 80 V for 120 msec transient
Case Operating Temperature (Tc)
• –55°C to +125°C full power
• –55°C to +130°C absolute
Derating Output Power/Current (Tc)
• Linearly from 100% at 125°C to 0% at 130°C
Electrical Characteristics: 25°C Tc, 28 VDC Vin, 100% load, unless otherwise specified.
SINGLE OUTPUT MODELS
PARAMETER
OUTPUT VOLTAGE
MSM283R3S
MSM2805S
MSM2812S
MSM2815S
CONDITIONS
Tc = 25°C
MIN TYP MAX MIN TYP MAX MIN TYP MAX MIN TYP MAX
3.25 3.3 3.35 4.93
UNITS
VDC
A
5
5.08 11.82 12 12.18 14.78 15 15.23
OUTPUT CURRENT
V
V
= 16 TO 40 VDC
—
1.52
—
—
1.0
—
—
0.42
—
—
0.33
—
IN
OUTPUT POWER
= 16 TO 40 VDC
0
—
5
0
—
5
0
—
5
0
—
5
W
IN
OUTPUT RIPPLE
VOLTAGE
LINE REGULATION
10 kHz - 2 MHz
Tc = –55°C TO +125°C
= 16 TO 40 VDC
—
—
—
250
1800
60
—
—
—
—
—
—
200
1500
80
—
—
—
—
—
—
180
1200
120
—
—
—
—
—
—
150
1000
150
—
—
—
mV p-p
mV
V
IN
LOAD REGULATION
INPUT VOLTAGE
NO LOAD TO FULL
INPUT CURRENT
NO LOAD TO FULL
CONTINUOUS
TRANSIENT 120 ms
NO LOAD
—
16
0
150
28
—
40
80
—
—
—
—
—
—
—
16
0
250
28
—
40
80
—
—
—
—
—
—
—
16
0
350
28
—
40
80
—
—
—
—
—
—
—
16
0
400
28
—
40
80
—
—
—
—
—
—
mV
VDC
V
—
—
—
—
—
—
—
—
—
—
28
—
—
—
—
—
—
25
—
—
—
—
—
—
20
—
—
—
—
—
—
16
FULL LOAD
242
4.5
30
180
74
235
4.5
25
150
76
230
4.5
20
120
78
223
4.5
15
100
80
mA
INHIBITED
INPUT RIPPLE
CURRENT
10k Hz - 10 MHz
Tc = –55°C TO +125°C
Tc = 25°C
mA p-p
%
EFFICIENCY
LOAD FAULT
POWER DISSIPATION
OVERLOAD
—
—
—
1.9
1
—
—
—
—
—
—
1.8
0.9
8.5
—
—
—
—
—
—
1.7
0.8
8
—
—
—
—
—
—
1.5
0.7
7.5
—
—
—
W
1
SHORT CIRCUIT
2
RECOVERY
9
ms
OUTPUT CURRENT
TRIP POINT
—
—
2.2
2.3
—
—
—
—
1.5
1.6
—
—
—
—
0.7
0.8
—
—
—
—
0.56
0.6
—
—
A
SHORT CIRCUIT
50 %–100%– 50%
STEP LOAD
RESPONSE
3
TRANSIENT
—
—
350
0.8
—
—
—
—
350
0.8
—
—
—
—
400
1.0
—
—
—
—
400
1.0
—
—
mV pk
ms
2
RECOVERY
STEP LINE
RESPONSE
16 TO 40 TO 16 V
IN
3
TRANSIENT
—
—
—
—
400
1.5
4
—
—
—
—
—
—
—
—
400
1.5
4
—
—
—
—
—
—
—
—
500
2.0
4
—
—
—
—
—
—
—
—
500
2.0
4
—
—
—
—
mV pk
ms
ms
2
RECOVERY
DELAY
START-UP
0 TO 28 VIN
OVERSHOOT
250
300
350
400
mV pk
Notes:
1. Short circuit is measured with a 50 mohm resistive load.
2. Time to settle within 1% of V
OUT
3. Transition ≥ 10 µs.
2
CRANE [ Crane Aerospace & Electronics. ]
