NTH Series
Isolated 2W Dual Output SM DC/DC Converters
KDC_NTH.C03 Page 1 of 6
www.murata-ps.com
www.murata-ps.com/support
For full details go to
www.murata-ps.com/rohs
SELECTION GUIDE
Order Code1
Nominal
Input
Voltage
Output
Voltage
Output
Current
Input
Current at
Rated Load
Efficiency Isolation
Capacitance MTTF2
V V mA mA % pF kHrs
NTH0505MC 5 ±5 ±200 500 80 27 2175
NTH0509MC 5 ±9 ±111 494 81 34 913
NTH0512MC 5 ±12 ±83 488 82 39 465
NTH0515MC 5 ±15 ±67 476 84 37 257
NTH1205MC 12 ±5 ±200 208 80 35 675
NTH1209MC 12 ±9 ±111 201 83 57 472
NTH1212MC 12 ±12 ±83 198 84 66 315
NTH1215MC 12 ±15 ±67 198 84 63 204
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
Reflected ripple current 5V input types 40 mA p-p
12V input types 30
OUTPUT CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Rated power 3TA=-40°C to 85°C 2.0 W
Voltage set point
accuracy
NTHXX05, 10% to 100% load -5.0 7.5 %
All other variants, 10% to 100% load -5.0 5.0
Line regulation High VIN to low VIN 1.0 1.2 %/%
Load regulation210% load to rated load, 5V output types 5.0 10 %
10% load to rated load, all other output types 3.0 10
Ripple & noise
BW=DC to 20MHz, 5V output types 150 200
mV p-p
BW=DC to 20MHz, 9V output types 100 150
BW=DC to 20MHz, 12V output types 80 150
BW=DC to 20MHz, 15V output types 70 150
ISOLATION CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Isolation test voltage Flash tested for 1 second 1000 VDC
Resistance Viso= 500VDC 1 10 GΩ
GENERAL CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Switching frequency All 5V input types 95 kHz
All 12V input types 90
ABSOLUTE MAXIMUM RATINGS
Internal power dissipation 550mW
Input voltage VIN, NTH05 types 7V
Input voltage VIN, NTH12 types 15V
1. If components are required in tape and reel format suffix order code code with -R, e.g. NTH0505MC-R.
2. Calculated using MIL-HDBK-217F with nominal input voltage at full load.
3. See derating graph.
All specifications typical at TA=25°C, nominal input voltage and rated output current unless otherwise specified.
DESCRIPTION
The NTH series of miniature surface mounted
DC/DC converters employ leadframe technol-
ogy and transfer moulding techniques to bring
all of the benefits of IC style packaging to hy-
brid circuitry. The component lead termination
of this product range is lead-free compatible,
therefore the converter can be soldered in a
lead-free soldering process. Co-planarity of the
lead positions is based upon IEC 191-6:1990.
The devices are suitable for all applications
where high volume production is envisaged.
FEATURES
RoHS compliant
Efficiency up to 84%
Wide temperature performance at full
2 Watt load, –40°C to 85°C
UL 94V-0 Package material
Lead frame technology
5V & 12V Input
5V, 9V, 12V & 15V Output
Internal SMD construction
Dual isolated output
1kVDC Isolation
MTTF up to 2.17 million hours
Power density 1.61W/cm3
No heatsink required
Custom solutions available
Multi layer ceramic capacitors
NTH Series
Isolated 2W Dual Output SM DC/DC Converters
KDC_NTH.C03 Page 2 of 6
www.murata-ps.com/support
TEMPERATURE CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Specification All output types -40 85
°C
Storage -55 125
Case temperature rise above
ambient
5V output types 30
All other output types 25
Cooling Free air convection
TOLERANCE ENVELOPE
TEMPERATURE DERATING GRAPH
150100
50
0
-40
0
1.0
2.0
3.0
Safe Operating Area
85°C
Ambient Temperature (°C)
Output Power (W)
RoHS COMPLIANCE INFORMATION
This series is compatible with RoHS soldering
systems with a peak reflow solder temperature
of 245ºC and time above liquidus of 217ºC
for 60 seconds. The pin termination finish on
this product series is Gold, plating thickness
0.1 microns minimum. The series is backward
compatible with Sn/Pb soldering systems.
For further information, please visit www.murata-ps.com/rohs
Output Load Current (%)
Output Voltage
-5.0%
-1.5%
+2.0%
Typical Load Line
10075
50
25
10
+5%
+1.5%
-2.0%
Output Load Current (%)
Output Voltage
-5.0%
-1.25%
+2.5%
Typical Load Line
10075
50
25
10
0%
+7.5%
+3.75%
5V output types All other output types
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 NTH 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 NTH 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 NTH 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.
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.
NTH Series
Isolated 2W Dual Output SM DC/DC Converters
KDC_NTH.C03 Page 3 of 6
www.murata-ps.com/support
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
µs
NTH0505MC 1026
NTH0509MC 3625
NTH0512MC 5750
NTH0515MC 8330
NTH1205MC 691
NTH1209MC 2645
NTH1212MC 3285
NTH1215MC 6120
NTH Series
Isolated 2W Dual Output SM DC/DC Converters
KDC_NTH.C03 Page 4 of 6
www.murata-ps.com/support
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
NTH0505MC 10 82103C 11R103C 4.7
NTH0509MC 22 82223C 11R223C 2.2
NTH0512MC 47 82473C 11R473C 1
NTH0515MC 220 82474C 11R474C 0.22
NTH1205MC 10 82103C 11R103C 4.7
NTH1209MC 22 82223C 11R223C 2.2
NTH1212MC 47 82473C 11R473C 1
NTH1215MC 220 82474C 11R474C 0.22
NTH Series
Isolated 2W Dual Output SM DC/DC Converters
KDC_NTH.C03 Page 5 of 6
www.murata-ps.com/support
PACKAGE SPECIFICATIONS
MECHANICAL DIMENSIONS PIN CONNECTIONS
Pin Function
1-VIN
3+VIN
5NA
9-V
OUT
11 OV
13 +VOUT
14 NA
16 NA
18 -VOUT
22 NC
24 NA
26 NA
NA - Not available for electrical connection.
NC - No internal electrical connection.-
RECOMMENDED FOOTPRINT DETAILS TUBE OUTLINE DIMENSIONS
All dimensions in inches ±0.01 (mm ±0.25mm). All pins on a 0.1 (2.54) pitch. Weight: 2.75g
All dimensions in inches ±0.02 (mm±0.5).
Tube length : 18.70±0.079 (475±2.0). Tube Quantity : 25
113
26 14
35 911
16 18 22 24
0.226 (5.75) 0.207 (5.25)
0.010 (0.25)
0.004 (0.10)
2.74 (0.108) MAX
0.06 (1.52) MAX 0.004 (0.1)
S
0.108 (2.75)
0.700 (17.78)
0.500 (12.70)
0.710 (18.03) 0.690 (17.53)
0.100 (2.54)
0.600 (15.24)
0.008 (0.2)
S
SEATING PLANE
S
±5.0°
0.020 (0.50)
x12 PINS
REFERENCE PLANE
DETAIL A
DETAIL A
12 PINS
0.029 (0.74) 0.025 (0.64)
5.35 (0.236)
6.00 (0.211)
0.008 (0.2)
S
0.012 (0.30)
0.008 (0.20)
x12 PINS
0.0416-0.0534 (1.0565-1.3565)
NTH0505MC
XYYWW
.*/
All dimensions in inches ±0.02 (mm±0.5)
NTH Series
Isolated 2W Dual Output SM DC/DC Converters
KDC_NTH.C03 Page 6 of 6
www.murata-ps.com/support
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. © 2014 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/
TAPE & REEL SPECIFICATIONS
REEL OUTLINE DIMENSIONS TAPE OUTLINE DIMENSIONS
REEL PACKAGING DETAILS
TRAILER SECTION
6.30 (160) MIN
GOODS ENCLOSURE
SECTION
LEADER SECTION
15.75 (400) MIN
CARRIER TAPE START
3.94 (100) MIN
XYYWW
NTH0505MC
XYYWW
NTH0505MC
XYYWW
NTH0505MC
."9
.*/
."9
"5)6#4&$5*0/
Reel Quantity : 400
0.157 (4.00)
0.079 (2.00)
0.722 (18.33)
0.069 (1.75)
0.559 (14.20)
1.260±0.012 (32.00±0.30)
0.726 (18.43)
0.394 (10.00)
0.945 (24.00)
0.024 (0.60) MAX
0.262 (6.65) 0.234 (5.95)
0.008±0.002 (0.20±0.05)
1.118 (28.40)
±0.002 (0.05)
Ø0.079 (Ø2.00) MIN
COVER TAPE
Ø1.50+0.10
-0.00 (Ø0.059+0.004
-0.000 )
(R0.75 )
+0.05
-0.00
R0.030+0.002
-0.000
DIRECTION OF UNREELING
XYYWW
NTH0505MC
A
ll dimensions in inches ±0.02 (mm±0.5)
A
ll dimensions in inches ±0.02 (mm±0.5)
A
ll dimensions in inches ±0.02 (mm±0.5)
