MTU2 Series
www.murata-ps.com
Isolated 2W Single & Dual Output SM DC/DC Converters
SELECTION GUIDE
1
Order Code
VV mA % mVp-p mA % % pF kHrs
MTU2S0305MC 3.3 5 400 12.5 15 53 75 740 74 79 15 2650
MTU2S0505MC 5 5 400 9.5 12 47 65 480 78 82 17 2763
MTU2S0524MC 5 24 83 9 11 14 30 460 79 85 18 3060
FEATURES
MTU2S1205MC 12 5 400 7.5 10 40 60 200 72 80 20 2207
Patent Protected
MTU2S2405MC 24 5 400 8 10 30 50 100 73 80 21 2314
MTU2D0505MC 5 5 200 10.5 13 30 55 480 77 82 19 2898
UL 60950 Recognised
MTU2D0512MC 5 12 83 8.5 11 15 35 460 79 85 19 2697
2
Footprint over pins 0.69cm
MTU2D1212MC 12 12 83 6.5 8 15 35 190 77 83 24 2452
Single & dual isolated output
INPUT CHARACTERISTICS
1kVDC Isolation Hi Pot Test
Parameter Conditions Min. Typ. Max. Units
Continuous operation, 3.3V input types 2.97 3.3 3.63
Efciency up to 85% (Typ.)
Continuous operation, 5V input types 4.5 5.0 5.5
Voltage range V
MSL Level 1
Continuous operation, 12V input types 10.8 12.0 13.2
3
Continuous operation, 24V input types 21.6 24 26.4
Power density 3.403W/cm
Reected ripple current All variants 10 mA p-p
3.3V, 5V, 12V & 24V Input
ISOLATION CHARACTERISTICS
5V,12V & 24V single & dual outputs
Parameter Conditions Min. Typ. Max. Units
Custom solutions available
Isolation voltage Flash tested for 1 minute 1000 VDC
Resistance Viso= 1000VDC 10 G
Multi-layer ceramic capacitors
OUTPUT CHARACTERISTICS
PRODUCT OVERVIEW
Parameter Conditions Min. Typ. Max. Units
The MTU2 series is a new range of miniature sur-
Rated power TA=-40C to 85C 2.0 W
face mount, high performance 2W DC/DC convert-
Voltage set point accuracy See tolerance envelope
ers. With a footprint reduction of over 50% from
MTU2S0305MC 1.0 1.3
Line regulation High VIN to low VIN %/%
the previous generations of 2W SMD DC/DC, the
All other variants 1.0 1.2
MTU2 series offers 2W of available output power
over a wide temperature range. The MTU2 series GENERAL CHARACTERISTICS
is more efcient and offers improved regulation
Parameter Conditions Min. Typ. Max. Units
performance for applications where a wide output
MTU2D0505MC 50 kHz
Switching frequency
voltage variation can not be tolerated. The MTU2
All other variants 70
series is pin compatible with the MTU2 series.
ABSOLUTE MAXIMUM RATINGS
The devices are suitable for all applications where
Input voltage VIN, MTU2S03 types 5.5V
high volume production is envisaged.
Input voltage VIN, MTU2S05 types 7V
Input voltage VIN, MTU2S12 types 15V
Input voltage VIN, MTU2S24 types 28V
1. If components are required in tape and reel format sufx order code with -R, e.g. MTU20505MC-R.
2. Calculated using MIL-HDBK-217 FN2 calculation model with nominal input voltage at full load.
3. See ripple & noise characterisation method.
For full details go to
All specications typical at TA=25C, nominal input voltage and rated output current unless otherwise specied.
www.murata-ps.com/rohs
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KDC_MTU2.C02 Page 1 of 9
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
MTTFMTU2 Series
Isolated 2W Single & Dual Output SM DC/DC Converters
TEMPERATURE CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Specication All output types -40 85
Storage -50 125
C
0305, 1205, 2405 30 45
1
Case temperature rise above ambient
25 35
All other variants
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 MTU2 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 MTU2 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 MTU2 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 MTU2 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 MTU2 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.
MTU2S03xxxC: 1.5A
MTU2S05xxxC: 0.63A
MTU2S12xxxC: 0.3A
MTU2S24xxxC: 0.25A
All fuses should be UL approved and rated to at least the maximum allowable DC input voltage.
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KDC_MTU2.C02 Page 2 of 9