NMR Series
Isolated 1W Single Output DC/DC Converters
KDC_NMR.D02 Page 1 of 5
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SELECTION GUIDE
Order
Code
Nominal
Input
Voltage
Output
Voltage
Output
Current
Input
Current at
Rated Load
Load
Regulation
Ripple &
Noise3Efficiency Isolation
Capacitance MTTF1
V V mA mA Typ. Max. Typ. Max. % pF kHrs
NMR100C 5 5 200 290 12.5 13.4 6 10 69 28 1847
NMR101C 5 12 83 260 6.90 7.70 4.6 10 77 33 981
NMR102C 5 15 67 253 6.50 7.50 4.3 10 79 40 667
NMR106C 12 5 200 121 12.5 13.4 5.3 10 69 36 1485
NMR107C 12 12 83 110 6.90 7.70 5 10 76 58 869
NMR108C 12 15 67 110 6.50 7.50 4 10 76 56 613
NMR112C 15 5 200 93 8.1 10 14 20 69 27 2110
NMR113C 15 12 83 85 3.3 4 12 15 77 58 1790
NMR114C 15 15 67 84 2.8 3.5 14 20 78 67 1560
NMR118C 24 5 200 60 6.80 10 8 15 70 61 1253
NMR119C 24 12 83 53 2.80 4.0 7 15 78 98 784
NMR120C 24 15 67 52 2.50 3.50 8 15 80 122 566
INPUT CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Voltage range
Continuous operation, 5V input types 4.5 5 5.5
V
Continuous operation, 12V input types 10.8 12 13.2
Continuous operation, 15V input types 13.5 15 16.5
Continuous operation, 24V input types 21.6 24 26.4
Reflected ripple current 5V & 12V input types 1.6 2 mA p-p
15V & 24V input types 5 10
OUTPUT CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Rated Power2TA=-40°C to 85°C 1.0 W
Voltage Set Point Accuracy See tolerance envelope
Line regulation High VIN to low VIN 1.0 1.2 %/%
ISOLATION CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Isolation voltage Flash tested for 1 second 1000 VDC
Resistance Viso=1000VDC 10 GΩ
ABSOLUTE MAXIMUM RATINGS
Lead temperature 1.5mm from case for 10 seconds 300°C
Internal power dissipation 550mW
Input voltage VIN, NMR100C, NMR101C, NMR102C 7V
Input voltage VIN, NMR106C, NMR107C, NMR108C 15V
Input voltage VIN, NMR112C, NMR113C, NMR114C 18V
Input voltage VIN, NMR118C, NMR119C, NMR120C 28V
1. Calculated using MIL-HDBK-217FN2 with nominal input voltage at full load.
2. See derating graph.
3. See ripple & noise characterisation method.
All specifications typical at TA=25°C, nominal input voltage and rated output current unless otherwise specified.
FEATURES
RoHS compliant
1kVDC isolation
Efficiency up to 80%
Wide temperature performance at full
1 watt load, –40°C to 85°C
Power density up to 0.90W/cm3
UL 94V-0 package material
Footprint from 1.17cm2
Industry standard pinout
5V, 12V, 15V & 24V input
5V, 12V & 15V output
No heatsink required
Internal SMD construction
Fully encapsulated with toroidal magnetics
Custom solutions available
No electrolytic or tantalum capacitors
DESCRIPTION
The NMR 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 single rail supplies on
primarily digital boards with the added benefit of
galvanic isolation to reduce switching noise. Sur-
face mount technology and advanced packaging
materials produce rugged reliable performance
over an extended temperature range from -40ºC
to 85ºC.
NMR Series
Isolated 1W Single Output DC/DC Converters
KDC_NMR.D02 Page 2 of 5
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GENERAL CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Switching frequency
5V input types 110
kHz
12V input types 160
15V input types 90
24V input types 80
TEMPERATURE CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Specification All output types -40 85
°C
Storage -50 130
Case Temperature above ambient 5V output types 33
All other output types 28
Cooling Free air convection
TOLERANCE ENVELOPES
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 NMR 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 NMR 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 NMR series has toroidal isolation transformers, with no additional insulation between primary and secondary windings of enameled 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 recognized 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.
+7%
Output Load Current (%)
Output Voltage
+4.5%
-5%
-2.5%
0%
Typical Load Line
VNOM
100
75
50
25
10
+4%
Output Load Current (%)
Output Voltage
+2%
-3%
-1%
+1%
Typical Load Line
VNOM
100
75
50
25
10
+10%
Output Load Current (%)
Output Voltage
+5%
-7.5%
-2.5%
+2.5%
Typical Load Line
VNOM
100
75
50
25
10
+2%
NMR118 NMR113, NMR 114, NMR119, NMR120 All other types
RoHS COMPLIANCE INFORMATION
This series is compatible with RoHS soldering systems with a peak wave solder temperature of 300ºC for 10 seconds. The pin termination finish
on this product series is Tin Plate, Hot Dipped over Matte Tin with Nickel Preplate. The series is backward compatible with Sn/Pb soldering
systems.
For further information, please visit www.murata-ps.com/rohs
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.
NMR Series
Isolated 1W Single Output DC/DC Converters
KDC_NMR.D02 Page 3 of 5
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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.
Ripple & Noise Characterisation Method
Ripple and noise measurements are performed with the following test configuration.
C1 1µF X7R m ultilayer ceramic capacitor, voltage rating to be a minimum of 3 times the output voltage of the DC/DC converter
C2 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 100m at 100 kHz
C3 100nF multilayer ceramic capacitor, general purpose
R1 450 resistor, carbon film, ±1% tolerance
R2 50 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.
Differential Mode Noise Test Schematic
OSCILLOSCOPE
Y INPUT
SUPPLY
C1 C2 C3 R1 T1 R2
Input Output
DC/DC Converter
R LOAD
+
+
-
-
Typical Start-Up Wave Form
Start-up time Start-up time
µs µs
NMR100C 2301 NMR112C 744
NMR101C 5570 NMR113C 1908
NMR102C 8289 NMR114C 6620
NMR106C 783 NMR118C 671
NMR107C 4770 NMR119C 5335
NMR108C 4850 NMR120C 6370
NMR Series
Isolated 1W Single Output DC/DC Converters
KDC_NMR.D02 Page 4 of 5
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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 <2% of the rated voltage of the DC/DC converter. The SRF (Self Resonant Frequency) should be
>20MHz.
DC
DC
L
CLoad
Power
Source
Inductor Capacitor
L, µH SMD Through Hole C, µF
NMR100C 10 82103C 11R103C 4.7
NMR101C 47 82473C 11R473C 1
NMR102C 47 82473C 11R473C 1
NMR106C 10 82103C 11R103C 4.7
NMR107C 47 82473C 11R473C 1
NMR108C 47 82473C 11R473C 1
NMR112C 10 82103C 11R103C 4.7
NMR113C 47 82473C 11R473C 1
NMR114C 47 82473C 11R473C 1
NMR118C 10 82103C 11R103C 4.7
NMR119C 47 82473C 11R473C 1
NMR120C 47 82473C 11R473C 1
NMR Series
Isolated 1W Single Output DC/DC Converters
KDC_NMR.D02 Page 5 of 5
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Murata Power Solutions, Inc. 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. © 2012 Murata Power Solutions, Inc.
Murata Power Solutions, Inc.
11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A.
ISO 9001 and 14001 REGISTERED
This product is subject to the following operating requirements
and the Life and Safety Critical Application Sales Policy:
Refer to: http://www.murata-ps.com/requirements/
PACKAGE SPECIFICATIONS
MECHANICAL DIMENSIONS PIN CONNECTIONS - 7 PIN SIP
Pin Function
1+VIN
2-VIN
4-VOUT
6+VOUT
TUBE OUTLINE DIMENSIONS
RECOMMENDED FOOTPRINT DETAILS
All dimensions in inches ±0.01 (mm ±0.25mm). All pins on a 0.1 (2.54) pitch and within
±0.01 (0.25) of true position.
Weight: 2.1g
7 Pin SIP Package
0.77
(19.50)
0.236
(6.00)
0.394
(10.00)
0.181 (4.60)
0.141 (3.60)
0.0118 (0.30)
0.0079 (0.20)
0.5 (12.70)
0.05
(1.25)
0.074±0.02
(1.88±0.50)
0.022 (0.55)
0.0178 (0.45)
0.1 (2.54)
NMR100C
XYYWWi
1 2 4 6
)0-&4
TEMPERATURE DERATING GRAPH
150100
50
0
-40
0
0.5
1.0
1.5
Safe Operating Area
85°C
Ambient Temperature (°C)
Output Power (W)
120°C
All dimensions in inches ±0.01 (mm ±0.25mm)
All dimensions in inches ±0.01 (mm ±0.25mm) Tube quantity: 25
