www.murata-ps.com
MEU1 Series
Isolated 1W Single Output DC/DC Converters
SELECTION GUIDE
Input Current at Rated Load
Isolation Capacitance (Typ.)
pF
76
79
79
81
81
77
81
81
83
83
83
84
86
87
28
30
34
40
33
29
34
47
45
39
43
71
91
91
Load Regulation (Max.)
Load Regulation (Typ.)
Nominal Input Voltage
Ripple & Noise (Max.)
Ripple & Noise (Typ.)
Efficiency (Min.)
Efficiency (Typ.)
Output Current
Output Voltage
Order Code
FEATURES
UL60950 recognised
Single isolated output
1kVDC isolation
Efficiency up to 87%
Wide temperature performance at full
1 watt load, –40°C to 85°C
Power density 2.62W/cm
3
3.3V, 5V, and 12V input
3.3V, 5V, 9V, 12V and 15V output
Custom solutions available
PCB mounting
Footprint reduction of over 26% from
previous generations of 1W DC/DC’s
MEU1S0303ZC
MEU1S0305ZC
MEU1S0309ZC
MEU1S0312ZC
MEU1S0315ZC
MEU1S0503ZC
MEU1S0505ZC
MEU1S0509ZC
MEU1S0512ZC
MEU1S0515ZC
MEU1S1205ZC
MEU1S1209ZC
MEU1S1212ZC
MEU1S1215ZC
V
3.3
3.3
3.3
3.3
3.3
5
5
5
5
5
12
12
12
12
V
3.3
5
9
12
15
3.3
5
9
12
15
5
9
12
15
mA
303
200
111
83
67
303
200
111
83
67
200
111
83
67
11
9
10
9
8
9
7
9
8
6
5
6
5
4
%
14
12
13
12
10
12
9
12
10
8
7
9
7
6
mVp-p
27
21
16
15
14
26
19
17
17
12
21
17
15
15
50
45
40
40
40
50
45
40
40
35
45
40
40
40
mA
385
373
376
369
371
249
244
245
239
239
100
100
100
100
73
76
75
77
77
74
78
77
78
78
79
80
82
84
%
kHrs
3084
3125
3960
3343
3140
2762
3354
2952
3317
2600
3742
2732
2438
2980
INPUT CHARACTERISTICS
Parameter
Voltage range
Conditions
Continuous operation, 3.3V input types
Continuous operation, 5V input types
Continuous operation, 12V input types
3.3V & 5V Input types
12V Input types
Min.
2.97
4.5
10.8
Typ.
3.3
5.0
12.0
3
5
Max.
3.63
5.5
13.2
15
15
Units
V
DESCRIPTION
The MEU1 series is a new range of ultra miniature
through hole 1W DC/DC converters, available in
a ZIP style pinout. The MEU1 series offers 1W
of available output power over the industrial
temperature range of -40ºC to 85ºC. They are
ideally suited for providing local supplies on
control system boards.
With the added benefit of 1kVDC galvanic
isolation to reduce switching noise and allows
the device to be configured to provide an isolated
negative rail in systems where only positive rails
exist.
Reflected ripple current
mA p-p
OUTPUT CHARACTERISTICS
Parameter
Rated Power
Voltage Set Point Accuracy
Line regulation
Conditions
T
A
=-40°C to 85°C
See tolerance envelope
High V
IN
to low V
IN
0303
All other types
Min.
Typ.
Max.
1.0
Units
W
1.0
1.0
1.25
1.2
%/%
ISOLATION CHARACTERISTICS
Parameter
Isolation test voltage
Resistance
Conditions
Flash tested for 1 second
Viso= 1000VDC
Min.
1000
10
Typ.
Max.
Units
VDC
GΩ
GENERAL CHARACTERISTICS
Parameter
Switching frequency
Conditions
Min.
Typ.
85
Max.
Units
kHz
1. Calculated using MIL-HDBK-217F FN2 with nominal input voltage at full load.
All specifications typical at T
A
=25°C, nominal input voltage and rated output current unless otherwise specified.
For full details go to
www.murata-ps.com/rohs
www.murata-ps.com/support
KDC_MEU1.C02
Page 1 of 8
MTTF
1
MEU1 Series
Isolated 1W Single Output DC/DC Converters
ABSOLUTE MAXIMUM RATINGS
Lead temperature 1.5mm from case for 10 seconds
Input voltage V
IN
, MEU1S03 types
Input voltage V
IN
, MEU1S05 types
Input voltage V
IN
, MEU1S12 types
260°C
5.5V
7V
15V
TEMPERATURE CHARACTERISTICS
Parameter
Specification
Storage
Case Temperature above ambient
Cooling
Conditions
All output types
MEU1S03
All other types
Free air convection
Min.
-40
-50
Typ.
Max.
85
125
30
25
Units
°C
TOLERANCE ENVELOPES
The voltage tolerance envelopes show typical load regulation characteristics for this product series. The tolerance envelope is the maximum output voltage variation due to
changes in output loading and set point accuracy.
MEU1S0303ZC
+11%
+10%
+6%
MEU1S0305ZC
Output Voltage
0.5%
-6%
10
25
75
50
Output Load Current (%)
100
Output Voltage
+6%
+1%
-4.5%
10
25
75
50
Output Load Current (%)
100
MEU1S0309ZC
+13%
+11%
MEU1S0312ZC
Output Voltage
Output Voltage
+4%
0%
-3.5%
10
25
75
50
Output Load Current (%)
100
+5%
0.5%
-3%
10
25
75
50
Output Load Current (%)
100
www.murata-ps.com/support
KDC_MEU1.C02
Page 2 of 8
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