MTU1 Series
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Isolated 1W Single & Dual Output SM DC/DC Converters
SELECTION GUIDE
1
Order Code
VV mA % mVp-p mA % % pF kHrs
MTU1S0305MC 3.3 5 200 8.9 11.0 26 60 367 79 81 14 7660
MTU1S0505MC 5 5 200 7.3 9 35 60 241 80 83 19 5664
MTU1S0509MC 5 9 111 6.1 7.5 15 25 233 83 86 20 5488
FEATURES
MTU1S0512MC 5 12 83 5.6 7.5 15 25 230 84 87 21 5186
Patent Protected
MTU1S0515MC 5 15 67 5.3 6.5 15 25 230 84 87 22 4773
MTU1S1205MC 12 5 200 5.6 8 20 40 99 80 84 22 5641
UL60950 recognised
MTU1S1209MC 12 9 111 3.9 6 15 25 96 82 87 31 5467
2
Footprint over pins 0.69cm
MTU1S1212MC 12 12 83 3.5 6 10 25 95 83 88 40 5165
Single & dual isolated output MTU1S1215MC 12 15 67 3.2 5 10 25 95 84 88 35 4753
MTU1D0305MC 3.3 5 100 8.0 9.5 18 35 356 80 83 17 5292
1kVDC Isolation Hi Pot Test
MTU1D0505MC 5 5 100 6.6 8 14 30 235 81 84 18 5053
Efciency up to 88% (Typ.)
MTU1D0509MC 5 9 56 5.6 6.5 7 20 229 83 86 21 5078
MTU1D0512MC 5 12 42 5.0 6 8 20 228 83 87 19 5545
MSL Level 1
MTU1D0515MC 5 15 33 5.1 6.5 8 20 224 84 88 22 5293
3
Power density 1.71W/cm
MTU1D1205MC 12 5 100 4.3 5 14 30 98 80 85 18 4335
MTU1D1209MC 12 9 56 3.1 4 7 20 95 82 87 27 4601
Wide temperature performance at full
MTU1D1212MC 12 12 42 3.0 4 8 20 94 84 88 35 4834
1 Watt load, 40C to 85C
MTU1D1215MC 12 15 33 2.6 3.5 8 20 94 84 88 35 4782
UL 94V-0 Package material
INPUT CHARACTERISTICS
3.3V, 5V & 12V Input
Parameter Conditions Min. Typ. Max. Units
5V, 9V, 12V & 15V single & dual outputs
Continuous operation, 3.3V input types 2.97 3.3 3.63
Voltage range Continuous operation, 5V input types 4.5 5.0 5.5 V
Toroidal magnetics
Continuous operation, 12V input types 10.8 12.0 13.2
Custom solutions available
3.3V input types 10
Single output types 5V input types 6
Multi-layer ceramic capacitors
Reected ripple current mA p-p
12V input types 5
Dual output types All variants 5
PRODUCT OVERVIEW
The MTU1 series is a new range of miniature
ISOLATION CHARACTERISTICS
surface mount, high performance 1W DC/DC
Parameter Conditions Min. Typ. Max. Units
converters. With a footprint reduction of over 50%
Isolation voltage Flash tested for 1 second 1000 VDC
from the previous generation of 1W SMD DC/DC,
Resistance Viso= 1000VDC 10 G
the MTU1 series offers 1W of available output
power over the full industrial temperature range of GENERAL CHARACTERISTICS
-40C to 85C. The MTU1 series is more efcient Parameter Conditions Min. Typ. Max. Units
and offers improved regulation performance for
MTU1D0305MC 70
applications where a wide output voltage variation
3.3V & 5V input, all output types
82
can not be tolerated.
(except MTU1D0305MC)
Switching frequency kHz
The devices are suitable for all applications where 12V input, single output types 90
high volume production is envisaged. 12V intput, dual output types 100
OUTPUT CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Rated power TA=-40C to 85C 1.0 W
Voltage set point accuracy
See tolerance envelope
Line regulation High VIN to low VIN 1.0 1.1 %/%
1. If components are required in tape and reel format sufx order code with -R, e.g. MTU10505MC-R.
For full details go to
2. Calculated using MIL-HDBK-217 FN2 calculation model with nominal input voltage at full load.
www.murata-ps.com/rohs
3. See ripple & noise characterisation method.
All specications typical at TA=25C, nominal input voltage and rated output current unless otherwise specied.
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KDC_MTU.C02 Page 1 of 8
Nominal Input
Voltage
Output
Voltage
Output Current
Load Regulation
(Typ.)
Load Regulation
(Max)
Ripple & Noise
3
(Typ.)
Ripple & Noise
3
(Max.)
Input Current at
Full Load
Efciency (Min.)
Efciency (Typ.)
Isolation
Capacitance
2
MTTFMTU1 Series
Isolated 1W Single & Dual Output SM DC/DC Converters
ABSOLUTE MAXIMUM RATINGS
Input voltage VIN, MTU1S03 types 5.5V
Input voltage VIN, MTU1S05 types 7V
Input voltage VIN, MTU1S12 types 15V
TEMPERATURE CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Specication All output types -40 85
Storage -55 125
MTU1xxx05MC 15 C
1
Case temperature rise above ambient MTU1xxx09MC 14
MTU1xxx12MC & MTU1xxx15MC 11
Cooling Free air convection
1. Measured after 1 hour continuous operation at nominal VIN full load at the center of each PCB.
TECHNICAL NOTES
ISOLATION VOLTAGE
REPEATED HIGH-VOLTAGE ISOLATION TESTING
Hi Pot Test, Flash Tested, Withstand Voltage, Proof Voltage, Dielectric Withstand Volt-
It is well known that repeated high-voltage isolation testing of a barrier component can
age & Isolation Test Voltage are all terms that relate to the same thing, a test voltage,
actually degrade isolation capability, to a lesser or greater degree depending on materi-
applied for a specied time, across a component designed to provide electrical isolation,
als, construction and environment. The MTU1 series has toroidal isolation transformers,
to verify the integrity of that isolation.
with no additional insulation between primary and secondary windings of enameled
Murata Power Solutions MTU1 series of DC/DC converters are all 100% production tested wire. While parts can be expected to withstand several times the stated test voltage,
at their stated isolation voltage. This is 1kVDC for 1 second. the isolation capability does depend on the wire insulation. Any material, including this
enamel (typically polyurethane) is susceptible to eventual chemical degradation when
A question commonly asked is, What is the continuous voltage that can be applied
subject to very high applied voltages thus implying that the number of tests should be
across the part in normal operation?
strictly limited. We therefore strongly advise against repeated high voltage isolation test-
The MTU1 has been recognized by Underwriters Laboratory for functional insulation, both
ing, but if it is absolutely required, that the voltage be reduced by 20% from specied
input and output should normally be maintained within SELV limits i.e. less than 42.4V
test voltage.
peak, or 60VDC. The isolation test voltage represents a measure of immunity to transient
This consideration equally applies to agency recognized parts rated for better than func-
voltages and the part should never be used as an element of a safety isolation system.
tional isolation where the wire enamel insulation is always supplemented by a further
The part could be expected to function correctly with several hundred volts offset applied
insulation system of physical spacing or barriers.
continuously across the isolation barrier; but then the circuitry on both sides of the bar-
rier 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.
SAFETY APPROVAL
The MTU1 series has been recognized by Underwriters Laboratory (UL) to UL 60950 for functional insulation to a maximum product PCB temperature of 120C. 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 dened 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.
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KDC_MTU.C02 Page 2 of 8