MTU1 Series
www.murata.com
Isolated 1W Single & Dual Output SM DC-DC Converters
1kVDC isolation “Hi Pot Test”
Efficiency up to 88% (Typ.)
MSL level 1
Power density 1.71W/cm3
Wide temperature performance at full
1 Watt load, –40°C to 85°C
UL 94V-0 package material
5V & 12V inputs
5V, 9V, 12V & 15V single & dual outputs
Toroidal magnetics
Custom solutions available
kHrs
60
25
25
25
40
20
20
241
233
230
230
99
229
94
80
83
84
84
80
83
84
83
86
87
87
84
86
88
19
20
21
22
22
21
35
5664
5488
5186
4773
5641
5078
4834
14
26
15
10
10
30
60
25
25
25
235
367
96
95
95
81
79
82
83
84
84
81
87
88
88
18
14
31
40
35
5053
7660
5467
5165
4753
NTA0505MC
NXE1S0305MC
NTE1209MC
NTE1212MC
NTE1215MC
18
8
8
14
7
8
35
20
20
30
20
20
356
228
224
98
95
94
80
83
84
80
82
84
83
87
88
85
87
88
17
19
22
18
27
35
5292
5545
5293
4335
4601
4782
NKA0305SC
NKA0512SC
NKA0515SC
NKA1205SC
NKA1209SC
NKA1215SC
MTU1S0505MC
MTU1S0509MC
MTU1S0512MC
MTU1S0515MC
MTU1S1205MC
MTU1D0509MC
MTU1D1212MC
5
5
5
5
12
5
12
5
9
12
15
5
±9
±12
200
111
83
67
200
±56
±42
7.3
6.1
5.6
5.3
5.6
5.6
3.0
9
7.5
7.5
6.5
8
6.5
4
35
15
15
15
20
7
8
MTU1D0505MC
MTU1S0305MC
MTU1S1209MC
MTU1S1212MC
MTU1S1215MC
5
3.3
12
12
12
±5
5
9
12
15
±100
200
111
83
67
6.6
8.9
3.9
3.5
3.2
8
11.0
6
6
5
MTU1D0305MC
MTU1D0512MC
MTU1D0515MC
MTU1D1205MC
MTU1D1209MC
MTU1D1215MC
3.3
5
5
12
12
12
±5 ±100
±12 ±42
±15 ±33
±5 ±100
±9 ±56
±15 ±33
8.0
5.0
5.1
4.3
3.1
2.6
9.5
6
6.5
5
4
3.5
%
mVp-p
Recommended
Alternative
pF
Load Regulation
(Typ.)
Load Regulation
(Max)
Ripple & Noise
(Typ.)3
Ripple & Noise
(Max.)3
%
mA
INPUT CHARACTERISTICS
Parameter
PRODUCT OVERVIEW
For full details go to
https://www.murata.com/englobal/products/power/rohs
%
V
Voltage range
The devices are suitable for all applications where
high volume production is envisaged.
mA
V
Multi-layer ceramic capacitors
The MTU1 series is a new range of miniature
surface mount, high performance 1W DC-DC
converters. With a footprint reduction of over 50%
from the previous generation of 1W SMD DC-DC,
the MTU1 series offers 1W of available output
power over the full industrial temperature range of
-40ºC to 85ºC. The MTU1 series is more efficient
and offers improved regulation performance for
applications where a wide output voltage variation
can not be tolerated.
MTTF2
Single & dual isolated output
Isolation
Capacitance
Footprint over pins 0.69cm2
Efficiency (Typ.)
UL60950 recognised
Efficiency (Min.)
Patent protected
Input Current at
Full Load
FEATURES
Nominal Input
Voltage
Output
Voltage
Order Code1
Output Current
SELECTION GUIDE
Reflected ripple current
Conditions
Min.
Typ.
Max.
Units
Continuous operation, 3.3V input types
Continuous operation, 5V input types
Continuous operation, 12V input types
3.3V input types
Single output types
5V input types
12V input types
Dual output types
All variants
2.97
4.5
10.8
3.3
5.0
12.0
10
6
5
5
3.63
5.5
13.2
V
Typ.
Max.
Units
1.0
W
1.0
1.1
%/%
Typ.
Max.
Units
mA p-p
OUTPUT CHARACTERISTICS
Parameter
Conditions
Rated power
TA=-40°C to 85°C
See tolerance envelope
High VIN to low VIN
Voltage set point accuracy
Line regulation
Min.
ISOLATION CHARACTERISTICS
Parameter
Conditions
Min.
Isolation voltage
Resistance
Flash tested for 1 second
Viso= 1000VDC
1000
10
VDC
GΩ
1. If components are required in tape and reel format suffix order code with -R, e.g. MTU10505MC-R.
2. Calculated using MIL-HDBK-217 FN2 calculation model with nominal input voltage at full load.
3. See ripple & noise characterisation method.
All specifications typical at TA=25°C, nominal input voltage and rated output current unless otherwise specified.
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KDC_MTU.I01 Page 1 of 10
MTU1 Series
Isolated 1W Single & Dual Output SM DC-DC Converters
GENERAL CHARACTERISTICS
Parameter
Conditions
Switching frequency
MTU1D0305MC
3.3V & 5V input, all output types
(except MTU1D0305MC)
12V input, single output types
12V intput, dual output types
Min.
Typ.
Max.
Units
70
82
kHz
90
100
TEMPERATURE CHARACTERISTICS
Parameter
Conditions
Min.
Specification
Storage
All output types (see safety approval section for limitations)
-40
-55
Case temperature rise above ambient1
Cooling
MTU1xxx05MC
MTU1xxx09MC
MTU1xxx12MC & MTU1xxx15MC
Free air convection
Typ.
Max.
Units
85
125
15
14
11
°C
ABSOLUTE MAXIMUM RATINGS
Input voltage VIN, MTU1S03 types
Input voltage VIN, MTU1S05 types
Input voltage VIN, MTU1S12 types
5.5V
7V
15V
1. Measured after 1 hour continuous operation at nominal VIN full load at the center of each PCB.
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KDC_MTU.I01 Page 2 of 10
MTU1 Series
Isolated 1W Single & Dual Output SM 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 MTU1 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?”
The MTU1 has been recognised by Underwriters Laboratory for functional insulation, 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 MTU1 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.
SAFETY APPROVAL
The MTU1 series has been recognised by Underwriters Laboratory (UL) to UL 60950 for functional insulation to a maximum product PCB temperature of 120°C. Forced air cooling
may be used to maintain this temperature requirement. File number E151252 applies.
The MTU1 Series of converters are not internally fused so to meet the requirements of UL 60950 an anti-surge input line fuse should always be used with ratings as defined below.
MTU1X03xxxC: 0.750A
MTU1X05xxxC: 0.125A
MTU1X12xxxC: 0.315A
All fuses should be UL approved and rated to at least the maximum allowable DC input voltage.
RoHS COMPLIANCE INFORMATION
This series is compatible with RoHS soldering systems with a peak reflow solder temperature of 245ºC as per J-STD-020D.1. Please refer to
application notes for further information. The pin termination finish on this product series is Matte Tin over Nickel Preplate. The series is backward
compatible with Sn/Pb soldering systems. The series has a Moisture Sensitivity Level (MSL) 1. Samples of the product series were tested in accordance with the conditioning described for MSL level 1 in IPS/J-STD-020D.1. The product series passed electrical tests and visual inspection criteria.
For further information, please visit: www.murata-ps.com/rohs
PART NUMBER STRUCTURE
MTU 1 X XX XX M C -RXX
Series name
Packaging code
Power rating
R7 - 7 inch reel
R13 - 13 inch reel
Output type
RoHS compliant
S - Single
D - Dual
T - Triple
Q - Quad
Input voltage
Package type
S - SIP
D - DIP
M - Surface mount
Z - ZIP
Output voltage
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KDC_MTU.I01 Page 3 of 10
MTU1 Series
Isolated 1W Single & Dual Output SM 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.
MTU1S0305MC
MTU1S0505MC
MTU1S0509MC
MTU1S0512MC
MTU1S0515MC
MTU1S1205MC
MTU1S1209MC
MTU1S1212MC
MTU1S1215MC
Start-up time
ms
1.7
0.9
2.7
4.3
7.5
0.9
1.9
3.3
4.7
MTU1D0305MC
MTU1D0505MC
MTU1D0509MC
MTU1D0512MC
MTU1D0515MC
MTU1D1205MC
MTU1D1209MC
MTU1D1212MC
MTU1D1215MC
Start-up time
ms
3.1
1.8
5.7
10.1
19.1
1.5
4
7.5
12.5
Typical Start-Up Wave Form
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KDC_MTU.I01 Page 4 of 10
MTU1 Series
Isolated 1W Single & Dual Output SM 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
Power
Source
DC
C
DC
Load
MTU1S0305MC
MTU1S0505MC
MTU1S0509MC
MTU1S0512MC
MTU1S0515MC
MTU1S1205MC
MTU1S1209MC
MTU1S1212MC
MTU1S1215MC
MTU1D0305MC
MTU1D0505MC
MTU1D0509MC
MTU1D0512MC
MTU1D0515MC
MTU1D1205MC
MTU1D1209MC
MTU1D1212MC
MTU1D1215MC
L, μH
10
10
22
47
47
10
22
47
47
10
10
22
47
47
10
22
47
47
Inductor
SMD
82103C
82103C
82223C
82473C
82473C
82103C
82223C
82473C
82473C
82103C
82103C
82223C
82473C
82473C
82103C
82223C
82473C
82473C
Through Hole
11R103C
11R103C
11R223C
11R473C
11R473C
11R103C
11R223C
11R473C
11R473C
11R103C
11R103C
11R223C
11R473C
11R473C
11R103C
11R223C
11R473C
11R473C
Capacitor
C, μF
10
4.7
2.2
1
1
4.7
2.2
1
1
10
4.7
2.2
1
1
4.7
2.2
1
1
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KDC_MTU.I01 Page 5 of 10
MTU1 Series
Isolated 1W Single & Dual Output SM DC-DC Converters
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.
3.3V Input Types
Single 5V output types (except 3.3V input)
4%
Output Voltage
Output Voltage
9%
1%
-4%
10
25
6%
1.5%
0%
-4%
100
75
50
Output Load Current (%)
10
25
Dual 5V output types (except 3.3V input)
50
75
Output Load Current (%)
100
121505 & 241505
2%
Output Voltage
Output Voltage
7%
1%
-4%
10
25
75
50
Output Load Current (%)
5%
1%
0%
-4%
10
100
25
50
75
100
Output Load Current (%)
TEMPERATURE DERATING GRAPH
1.5
85°C
Output Power (W)
1.0
0.5
0
-40
Safe Operating Area
100
50
0
Ambient Temperature (°C)
150
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KDC_MTU.I01 Page 6 of 10
MTU1 Series
Isolated 1W Single & Dual Output SM DC-DC Converters
EFFICIENCY VS LOAD
MTU1x03xxMC
MTUx05xxMC
90
90
80
80
70
3.3V Dual Output
3.3V Single Output
60
Efficiency (%)
Efficiency (%)
70
50
40
30
50
40
30
20
20
10
10
0
15V
12V
9V
5V
60
0
0
10
20
30
40
50
60
Load (%)
70
80
90
100
110
90
100
0
10
20
30
40
50
60
Load (%)
70
80
90
100
MTU1x12xxMC
90
80
Efficiency (%)
70
15V
12V
9V
5V
60
50
40
30
20
10
0
0
10
20
30
40
50
60
Load (%)
70
80
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KDC_MTU.I01 Page 7 of 10
MTU1 Series
Isolated 1W Single & Dual Output SM DC-DC Converters
PACKAGE SPECIFICATIONS
MECHANICAL DIMENSIONS
PIN CONNECTIONS
8.20 (0.323)
2.54 (0.100)
6
4
5
Pin
1
3
4
5
6
3
1
1.56 (0.061)
Pin
5.08 (0.200)
1
3
4
5
6
8.40±0.45 (0.331±0.018)
Single Output Types
Function
+VIN
-VIN
NC
OV
+VOUT
Dual Output Types
Function
+VIN
-VIN
-VOUT
OV
+VOUT
+0.000
8.50 +0.00
-0.20 ( 0.335-0.008 )
S
0.3 (0.012)
(Typ.)
0.25±0.1
(0.01)
0.60±0.1
(0.024)
x5 PINS
0.10 (0.004) S
SEATING
PLANE
1.80±0.2 (0.071)
1.80±0.2 (0.071)
All dimensions in mm ±0.25mm (inches ±0.01). All pins on a 2.54 (0.1) pitch and within 0.25 (0.01) of true position.
Weight: 0.75g, typ.
TUBE OUTLINE DIMENSIONS
RECOMMENDED FOOTPRINT DETAILS
6.50 (0.256)
2.54 (0.100)
2.54 (0.100)
1.00 (0.039)
2.60 (0.102)
Unless otherwise stated all dimensions in mm (inches).
Tube length: 520mm {20.472) ±2.00 (0.079).
Tube Quantity: 60
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KDC_MTU.I01 Page 8 of 10
MTU1 Series
Isolated 1W Single & Dual Output SM DC-DC Converters
TAPE & REEL SPECIFICATIONS
REEL OUTLINE DIMENSIONS
REEL PACKAGING DETAILS
TAPE OUTLINE DIMENSIONS
Unless otherwise stated all dimensions in mm (inches).
Controlling dimension is mm.
Components shall be orientated within the carrier tape as indicated.
Reel Quantity: 400 pcs.
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KDC_MTU.I01 Page 9 of 10
MTU1 Series
Isolated 1W Single & Dual Output SM 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_MTU.I01 Page 10 of 10
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