MEJ1 Series
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5.2kVDC Isolated 1W DC/DC Converters
SELECTION GUIDE
Order Code
V V mA % mVp-p % kHrs
MEJ1S0303SC 3.3 3.3 303 410 8.5 11 42 55 67 70 3653
MEJ1S0305SC 3.3 5 200 400 9 10 33 45 68 71.5 3810
FEATURES
MEJ1S0503SC 5 3.3 303 280 6.5 8 20 40 66 69 4117
MEJ1S0505SC 5 5 200 270 5.5 7 24 40 68 72 4082
n Basic/supplementary isolation to
MEJ1S0509SC 5 9 111 265 4.5 5 20 40 70 74 3939
2
UL 60950
MEJ1S0512SC 5 12 83 260 4.5 7 22 40 71 74 3816
2 MEJ1S0515SC 5 15 66 260 5 6 22 40 72 75 3412
n UL60601 (3rd Ed) recognition
MEJ1S1203SC 12 3.3 303 110 6 7 25 45 69 72 3461
n Single and dual outputs
MEJ1S1205SC 12 5 200 110 5 6 21 40 71 74.5 3319
Contact Factory
MEJ1S1209SC 12 9 111 105 4 5 18 40 73 76.5 3218
n UL 94V-0 package material
MEJ1S1212SC 12 12 83 105 3.5 5 19 40 73 76.5 3494
MEJ1S1215SC 12 15 66 105 4 5 16 40 73 77 3150
n SIP package style
MEJ1S1505SC 15 5 200 90 5 6 23 45 70 74 3048
n 5.2kVDC isolation
MEJ1S1509SC 15 9 111 85 4 5 18 40 72 76 2963
MEJ1S1512SC 15 12 83 85 4 5 20 40 72 76.5 2733
n 3.3V, 5V, 12V, 15V & 24V inputs
MEJ1S1515SC 15 15 66 85 4 5 19 35 73 76.5 2333
MEJ1S2405SC 24 5 200 55 5 6 23 40 71 75 3353
n 3.3V, 5V, 9V, 12V & 15V output
MEJ1S2409SC 24 9 111 55 4 7 17 40 72 77 2940
n Internal SMD construction
MEJ1S2412SC 24 12 83 55 4 5 19 40 72 78 2987
MEJ1S2415SC 24 15 66 55 3.5 5 17 40 74 78 2517
n Fully encapsulated with toroidal magnetics
MEJ1D0503SC 5 3.3 151 280 6 8 19 40 67 70 4511
MEJ1D0505SC 5 5 100 275 5 6 23 35 69 72 4012
n Pin compatible with the MEV, NMV, NMK,
MEJ1D0509SC 5 9 55 265 4 6 16 35 69 74 3492
MEJ2, & NMJ series
MEJ1D0512SC 5 12 42 260 4 5 15 30 72 74.5 3485
MEJ1D0515SC 5 15 33 260 4 5 13 35 71 75.5 2844
PRODUCT OVERVIEW
MEJ1D1203SC 12 3.3 151 110 5.5 6 19 40 70 73 3461
MEJ1D1205SC 12 5 100 110 4.5 5 18 40 72 75.5 3317
The MEJ1 series are single and dual output DC/DC
MEJ1D1209SC 12 9 55 110 4 5 15 35 73 77 2908
converters in a 7 pin SIP package style offering an
MEJ1D1212SC 12 12 42 110 3.5 5 14 30 74 76.5 2911
isolation and insulation upgrade path from the NMV
MEJ1D1215SC 12 15 33 110 4 5 11 35 73 77 2713
& MEV1 series. The MEJ1 series has UL60950
MEJ1D1505SC 15 5 100 90 4.5 5 19 40 72 75 3274
and UL60601 recognition, which makes it ideal for
MEJ1D1509SC 15 9 55 85 4 5 14 35 73 76.5 3229
applications where safety and miniaturisation are
MEJ1D1512SC 15 12 42 85 3.5 5 13 35 73 77 2872
of paramount importance.
MEJ1D1515SC 15 15 33 85 3.5 5 20 35 73 76.5 2440
MEJ1D2405SC 24 5 100 55 4.5 5 19 40 72 76.5 3316
MEJ1D2409SC 24 9 55 55 3.5 5 17 35 73 78 3208
MEJ1D2412SC 24 12 42 55 3.5 5 12 35 74 78 3362
MEJ1D2415SC 24 15 33 55 3.5 5 14 35 74 78.5 2697
INPUT CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Continuous operation, 3V input types 2.97 3.3 3.63
Continuous operation, 5V input types 4.5 5 5.5
Continuous operation, 12V input types 10.8 12 13.2
Voltage range V
Continuous operation, 15V input types 13.5 15 16.5
Continuous operation, 24V input types 21.6 24 26.4
3.3V input types 40
5V input types 24
Input reflected ripple mA
12V & 15V input types 12
24V input types 8
1. Calculated using MIL-HDBK-217 FN2 calculation model with nominal input voltage at full load.
For full details go to 2. See safety approvals section for limitations of use.
www.murata-ps.com/rohs 3. See ripple & noise test method.
All specifications typical at T A=25C, nominal input voltage and rated output current unless otherwise specified.
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KDC_MEJ1C.A01 Page 1 of 9
Dual Single
Nominal Input
Voltage
Output Voltage
Output Current
Input Current
(Typ)
Load Regulation
(Typ)
Load Regulation
(Max)
Ripple & Noise
3
(Typ)
Ripple & Noise
3
(Max)
Efficiency
(Min)
Efficiency
(Typ)
1
MTTFMEJ1 Series
5.2kVDC Isolated 1W DC/DC Converters
OUTPUT CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
2
Rated Power TA=-40C to 85C 1 W
Voltage Set Point Accuracy See tolerance envelopes
Line regulation High VIN to low VIN 1.1 1.2 %/%
ABSOLUTE MAXIMUM RATINGS
Short-circuit protection 48 Hours
Lead temperature 1mm from case for 10 seconds 260C
Input voltage VIN, MEJ1x03xxSC 5V
Input voltage VIN, MEJ1x05xxSC 7V
Input voltage VIN, MEJ1x12xxSC 15V
Input voltage VIN, MEJ1x15xxSC 18V
Input voltage VIN, MEJ1x24xxSC 28V
ISOLATION CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Isolation test voltage Flash tested for 1 second 5200 VDC
Resistance Viso= 500VDC 1 G
Isolation capacitance 3 pF
GENERAL CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Switching frequency All types 50 kHz
TEMPERATURE CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Specification All output types (see safety approval section for limitations) -40 85
Storage -55 125
MEJ1S1212SC, MEJ1S1512SC, MEJ1S2412SC, MEJ1D1215SC, MEJ1D1512SC,
13
MEJ1D2412SC, MEJ1D2415SC, MEJ1S1215SC, MEJ1S1509SC, MEJ1S2409SC
MEJ1D1205SC, MEJ1D1209SC, MEJ1D2405SC, MEJ1D2409SC, MEJ1S1209SC,
C
MEJ1S1515SC, MEJ1S2415SC, MEJ1D1212SC, MEJ1D1509SC, MEJ1S0515SC,
Case Temperature above ambient
MEJ1S2405SC, MEJ1D0512SC, MEJ1D0515SC, MEJ1D1515SC, MEJ1S1505SC , 17
MEJ1D0505SC, MEJ1D0509SC, MEJ1D1203SC, MEJ1D1505SC, MEJ1S0509SC,
MEJ1S0512SC, MEJ1S1205SC
MEJ1S0505SC, MEJ1S1203SC, MEJ1D0503SC, MEJ1S0303SC, MEJ1S0305SC,
21
MEJ1S0503SC
Cooling Free air convection
TEMPERATURE DERATING GRAPH
1.0
Safe
0.5
Operating Area
0.2
-40 0 40 85
Ambient Temperature (C)
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KDC_MEJ1C.A01 Page 2 of 9
Output Power (W)