NMA 5V, 12V & 15V Series
WWW.MURATA.COM
Isolated 1W Dual Output DC-DC Converters
Output Current
Input Current at
Rated Load
Efficiency
Isolation
Capacitance
MTTF1
V
mA
mA
%
pF
kHrs
FEATURES
NMA0505DC
NMA0512DC
NMA0515DC
NMA0505SC
NMA0509SC
NMA0512SC
NMA0515SC
NMA1205DC
NMA1212DC
NMA1215DC
NMA1205SC
NMA1209SC
NMA1212SC
NMA1215SC
5
5
5
5
5
5
5
12
12
12
12
12
12
12
±5
±12
±15
±5
±9
±12
±15
±5
±12
±15
±5
±9
±12
±15
±100
±42
±33
±100
±55
±42
±33
±100
±42
±33
±100
±55
±42
±33
289
260
256
289
267
260
256
120
111
110
120
113
111
110
69
77
78
69
75
77
78
69
75
76
69
74
75
76
28
34
36
28
32
34
36
33
55
54
33
46
55
54
3103
1579
1065
3103
2257
1579
1065
2193
1303
932
2193
1734
1303
932
Efficiency up to 80%
Wide temperature performance at full
1 Watt load, –40°C to 85°C
Dual output from a single input rail
Industry standard pinout
Power sharing on output
1kVDC isolation ‘Hi Pot Test’
5V & 12V inputs
5V, 9V, 12V & 15V outputs
NMA0509DC
NMA1512SC
NMA1515SC
5
15
15
±9
±12
±15
±55
±42
±33
267
87
84
75
78
80
32
68
84
2257
790
523
NMA1209DC
NMA1505DC
NMA1505SC
NMA1512DC
NMA1515DC
12
15
15
15
15
±9
±5
±5
±12
±15
±55
±100
±100
±42
±33
113
91
91
87
84
74
71
71
78
80
46
39
39
68
84
1734
1941
1941
790
523
Recommended
Alternative
Output Voltage
V
Order Code
Package
Style
Nominal Input
Voltage
SELECTION GUIDE
DIP
SIP
DIP
SIP
Internal SMD construction
Fully encapsulated with toroidal
magnetics
DIP
SIP
MEA1D0509SC
MEA1D1512SC
MEA1D1515SC
No external components required
MTTF up to 3.1 million hours
Pin compatible with NKA & MEA1 series
No electrolytic or tantalum capacitors
DIP
SIP
DIP
NKA1209SC
Contact Murata
Contact Murata
Contact Murata
NMV1515SC
DESCRIPTION
The NMA series of industrial temperature range
DC-DC converters are the standard building
blocks for on-board distributed power systems.
They are ideally suited for providing dual rail
supplies on primarily digital boards with the added
benefit of galvanic isolation to reduce switching
noise. All of the rated power may be drawn from a
single pin provided the total load does not exceed
1 watt.
For full details go to
https://www.murata.com/englobal/products/power/rohs
INPUT CHARACTERISTICS
Parameter
Conditions
Min.
Typ.
Max.
Voltage range
Continuous operation, 5V input types
Continuous operation, 12V input types
Continuous operation, 15V input types
4.5
10.8
13.5
5
12
15
20
5.5
13.2
16.5
40
Reflected ripple current
Units
V
mA p-p
1. Calculated using MIL-HDBK-217FN2 calculation model with nominal input voltage at full load.
All specifications typical at TA=25°C, nominal input voltage and rated output current unless otherwise specified.
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KDC_NMA.N01 Page 1 of 9
NMA 5V, 12V & 15V Series
Isolated 1W Dual Output DC-DC Converters
OUTPUT CHARACTERISTICS
Parameter
Rated Power
Voltage Set Point Accuracy
Line regulation
Load Regulation
10% load to rated load
Conditions
TA=-40°C to 120°C, see derating graph
See tolerance envelope
High VIN to low VIN
5V & 12V input
15V input
Ripple and Noise1
Min.
5V output types
9V output types
12V output types
15V output types
5V output types
12V output types
15V output types
BW=DC to 20MHz, 5V output types
BW=DC to 20MHz, 9V output types
BW=DC to 20MHz, 12V output types
BW=DC to 20MHz, 15V output types
Typ.
Max.
Units
1
W
1.0
10
9
6.5
6
5.5
2.6
2.3
10
7
7.5
8
1.2
12.5
10
7.5
7.0
10
3.0
3.0
20
15
15
15
%/%
Typ.
Max.
%
mV p-p
ISOLATION CHARACTERISTICS
Parameter
Conditions
Min.
Isolation test voltage
Resistance
Flash tested for 1 second
Viso= 1000VDC
1000
Parameter
Conditions
Min.
Switching frequency
5V input types
12V input types
15V input types
Units
VDC
GΩ
10
GENERAL CHARACTERISTICS
Typ.
Max.
110
140
90
Units
kHz
TEMPERATURE CHARACTERISTICS
Parameter
Conditions
Min.
Specification
Storage
All output types
-40
-50
Case Temperature above ambient
Cooling
0505, 1205
0509, 0512, 0515, 1209, 1212, 1215
1505
1512, 1515
Free air convection
Typ.
Max.
Units
85
130
33
28
26
17
°C
ABSOLUTE MAXIMUM RATINGS
Lead temperature 1.5mm from case for 10 seconds
Wave Solder
Input voltage VIN, NMA05 types
Input voltage VIN, NMA12 types
Input voltage VIN, NMA15 types
260°C
Wave Solder profile not to exceed the profile recommended in IEC 61760-1
Section 6.1.3. Please refer to application notes for further information.
7V
15V
18V
1. See Ripple & Noise characterisation method.
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KDC_NMA.N01 Page 2 of 9
NMA 5V, 12V & 15V Series
Isolated 1W Dual Output DC-DC Converters
TECHNICAL NOTES
ISOLATION VOLTAGE
‘Hi Pot Test’, ‘Flash Tested’, ‘Withstand Voltage’, ‘Proof Voltage’, ‘Dielectric Withstand Voltage’ & ‘Isolation Test Voltage’ are all terms that relate to the same thing, a test voltage,
applied for a specified time, across a component designed to provide electrical isolation, to verify the integrity of that isolation.
Murata Power Solutions NMA series of DC-DC converters are all 100% production tested at their stated isolation voltage. This is 1kVDC for 1 second.
A question commonly asked is, “What is the continuous voltage that can be applied across the part in normal operation?”
For a part holding no specific agency approvals, such as the NMA series, both input and output should normally be maintained within SELV limits i.e. less than 42.4V peak, or
60VDC. The isolation test voltage represents a measure of immunity to transient voltages and the part should never be used as an element of a safety isolation system. The part
could be expected to function correctly with several hundred volts offset applied continuously across the isolation barrier; but then the circuitry on both sides of the barrier must be
regarded as operating at an unsafe voltage and further isolation/insulation systems must form a barrier between these circuits and any user-accessible circuitry according to safety
standard requirements.
REPEATED HIGH-VOLTAGE ISOLATION TESTING
It is well known that repeated high-voltage isolation testing of a barrier component can actually degrade isolation capability, to a lesser or greater degree depending on materials,
construction and environment. The NMA series has toroidal isolation transformers, with no additional insulation between primary and secondary windings of enamelled wire. While
parts can be expected to withstand several times the stated test voltage, the isolation capability does depend on the wire insulation. Any material, including this enamel (typically
polyurethane) is susceptible to eventual chemical degradation when subject to very high applied voltages thus implying that the number of tests should be strictly limited. We
therefore strongly advise against repeated high voltage isolation testing, but if it is absolutely required, that the voltage be reduced by 20% from specified test voltage.
This consideration equally applies to agency recognised parts rated for better than functional isolation where the wire enamel insulation is always supplemented by a further
insulation system of physical spacing or barriers.
RoHS COMPLIANT INFORMATION
This series is compatible with RoHS soldering systems with a peak wave solder temperature of
260°C for 10 seconds. Please refer to application notes for further information. The pin termination
finish on the SIP package type is Tin Plate, Hot Dipped over Matte Tin with Nickel Preplate. The DIP
types are Matte Tin over Nickel Preplate. Both types in this series are backward compatible with Sn/
Pb soldering systems. For further information, please visit www.murata-ps.com/rohs
PART NUMBER STRUCTURE
NMA XX XX S C
Series name
RoHS compliant
Input voltage
Package type
Output voltage
S - SIP
D - DIP
M - Surface mount
Z - ZIP
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KDC_NMA.N01 Page 3 of 9
NMA 5V, 12V & 15V Series
Isolated 1W Dual Output DC-DC Converters
CHARACTERISATION TEST METHODS
Ripple & Noise Characterisation Method
Ripple and noise measurements are performed with the following test configuration.
C1
1μF X7R multilayer ceramic capacitor, voltage rating to be a minimum of 3 times the output voltage of the DC-DC converter
10μF tantalum capacitor, voltage rating to be a minimum of 1.5 times the output voltage of the DC-DC converter with an ESR of less
than 100mΩ at 100 kHz
C3
100nF multilayer ceramic capacitor, general purpose
R1
450Ω resistor, carbon film, ±1% tolerance
R2
50Ω BNC termination
T1
3T of the coax cable through a ferrite toroid
RLOAD
Resistive load to the maximum power rating of the DC-DC converter. Connections should be made via twisted wires
Measured values are multiplied by 10 to obtain the specified values.
C2
Differential Mode Noise Test Schematic
DC/DC Converter
OSCILLOSCOPE
C1 C2 C3
+
SUPPLY
Input
-
+
R1
T1
R2
Y INPUT
Output
-
R LOAD
APPLICATION NOTES
Minimum load
The minimum load to meet datasheet specification is 10% of the full rated load across the specified input voltage range. Lower than 10% minimum loading will result in
an increase in output voltage, which may rise to typically double the specified output voltage if the output load falls to less than 5%.
Capacitive loading and start up
Typical start up times for this series, with a typical input voltage rise time of 2.2μs and output capacitance of 10μF, are shown in the table below. The product
series will start into a capacitance of 47μF with an increased start time, however, the maximum recommended output capacitance is 10μF.
Typical Start-Up Wave Form
NMA0505xC
NMA0509xC
NMA0512xC
NMA0515xC
NMA1205xC
NMA1209xC
Start-up time
μs
2018
6610
14520
20200
1061
3935
NMA1212xC
NMA1215xC
NMA1505xC
NMA1512xC
NMA1515xC
Start-up time
μs
9765
15980
1060
1627
6275
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KDC_NMA.N01 Page 4 of 9
NMA 5V, 12V & 15V Series
Isolated 1W Dual Output DC-DC Converters
APPLICATION NOTES (Continued)
Output Ripple Reduction
By using the values of inductance and capacitance stated, the output ripple at the rated load is lowered to 5mV p-p max.
Component selection
Capacitor: It is required that the ESR (Equivalent Series Resistance) should be as low as possible, ceramic types are recommended.
The voltage rating should be at least twice (except for 15V output), the rated output voltage of the DC-DC converter.
Inductor: The rated current of the inductor should not be less than that of the output of the DC-DC converter. At the rated current, the DC resistance of the inductor
should be such that the voltage drop across the inductor is 20MHz.
L
DC
Power
Source
NMA0505xC
NMA0509xC
NMA0512xC
NMA0515xC
NMA1205xC
NMA1209xC
NMA1212xC
NMA1215xC
NMA1505xC
NMA1512xC
NMA1515xC
L, μH
22
100
150
220
22
47
150
220
22
150
220
Inductor
SMD
82223C
82104C
82154C
82224C
82223C
82473C
82154C
82224C
82223C
82154C
82224C
Through Hole
11R223C
11R104C
11R154C
11R224C
11R223C
11R473C
11R154C
11R224C
11R223C
11R154C
11R224C
C
Load
DC
Capacitor
C, μF
2.2uF
0.47uF
0.33uF
1uF
2.2uF
1uF
0.33uF
1uF
2.2uF
0.33uF
2.2uF
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KDC_NMA.N01 Page 5 of 9
NMA 5V, 12V & 15V Series
Isolated 1W Dual Output DC-DC Converters
TOLERANCE ENVELOPES
The voltage tolerance envelope shows typical load regulation characteristics for this product series. The tolerance envelope is the maximum output voltage variation due to
changes in output loading.
All variants
10%
Typica
l
Output Voltage
5%
Load L
ine
2.5%
0%
-2.5%
-7.5%
10
25
50
75
Output Load Current (%)
100
TEMPERATURE DERATING GRAPH
Output Power (W)
1.5
1.0
0.5
85°C
Safe Operating Area
120°C
0
-40
100
50
0
Ambient Temperature (°C)
150
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KDC_NMA.N01 Page 6 of 9
NMA 5V, 12V & 15V Series
Isolated 1W Dual Output DC-DC Converters
PACKAGE SPECIFICATIONS
MECHANICAL DIMENSIONS
PIN CONNECTIONS - 14 PIN DIP
SIP package
DIP package
Pin
Function
1
-VIN
7
NC
8
OV
9
+VOUT
11
-VOUT
14
+VIN
NMAXXXXSC
XWWYY
PIN CONNECTIONS - 7 PIN SIP
Pin
Function
1
+VIN
2
-VIN
4
-VOUT
5
OV
6
+VOUT
Unless otherwise stated all dimensions in mm ±0.25mm.
All pins on a 2.54mm pitch and within 0.25mm of true position.
For SIP products, from date code D2224 onwards, products have an embossed
logo on the top of the case. Prior to this date, SIP products have a flat surface finish.
Weight: 2.4g (DIP) 2.1g (SIP)
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KDC_NMA.N01 Page 7 of 9
NMA 5V, 12V & 15V Series
Isolated 1W Dual Output DC-DC Converters
PACKAGE SPECIFICATIONS (Continued)
RECOMMENDED FOOTPRINT DETAILS
7 Pin SIP Package
14 Pin DIP Package
TUBE OUTLINE DIMENSIONS
7 Pin SIP Tube
14 Pin DIP Tube
9.3 [0.366]
12.0 [0.472]
12.43 [0.489]
14.5 [0.571]
18.0 [0.709]
5.07±0.80 [0.200±0.03]
5.05 [0.199]
Unless otherwise specified all dimensions in mm [inches] ±0.55mm [0.022].
Tube length (14 Pin DIP) : 520mm [20.472] ±2.0 [0.079].
Tube length (7 Pin SIP) : 520mm [20.472] ±2.0 [0.079].
5.0 [0.197]
Tube Quantity : 25
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KDC_NMA.N01 Page 8 of 9
NMA 5V, 12V & 15V Series
Isolated 1W Dual Output DC-DC Converters
DISCLAIMER
Unless otherwise stated in the datasheet, all products are designed for standard commercial and industrial applications and NOT for safety-critical and/or life-critical
applications.
Particularly for safety-critical and/or life-critical applications, i.e. applications that may directly endanger or cause the loss of life, inflict bodily harm and/or loss or severe
damage to equipment/property, and severely harm the environment, a prior explicit written approval from Murata is strictly required. Any use of Murata standard products for any safety-critical, life-critical or any related applications without any prior explicit written approval from Murata shall be deemed unauthorised use.
These applications include but are not limited to:
•
Aircraft equipment
•
Aerospace equipment
•
Undersea equipment
•
Power plant control equipment
•
Medical equipment
•
Transportation equipment ( automobiles, trains, ships, etc.)
•
Traffic signal equipment
•
Disaster prevention / crime prevention equipment
•
Data Processing equipment
Murata makes no express or implied warranty, representation, or guarantee of suitability, fitness for any particular use/purpose and/or compatibility with any application or device of the buyer, nor does Murata assume any liability whatsoever arising out of unauthorised use of any Murata product for the application of the buyer. The
suitability, fitness for any particular use/purpose and/or compatibility of Murata product with any application or device of the buyer remain to be the responsibility and
liability of the buyer.
Buyer represents and agrees that it has all the necessary expertise to create and implement safeguards that anticipate dangerous consequences of failures, monitor failures and their consequences, lessen the likelihood of failures that might cause harm, and take appropriate remedial actions. Buyer will fully indemnify and hold
Murata, its affiliated companies, and its representatives harmless against any damages arising out of unauthorised use of any Murata products in any safety-critical and/
or life-critical applications.
Remark: Murata in this section refers to Murata Manufacturing Company and its affiliated companies worldwide including, but not limited to, Murata Power Solutions.
This product is subject to the following operating requirements
and the Life and Safety Critical Application Sales Policy:
Refer to: https://www.murata.com/en-eu/products/power/requirements
Murata Power Solutions (Milton Keynes) Ltd. makes no representation that the use of its products in the circuits described herein, or the use
of other technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do
not imply the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifications are subject to change
without notice.
© 2022 Murata Power Solutions (Milton Keynes) Ltd.
www.murata.com
KDC_NMA.N01 Page 9 of 9