254-350-AJAJ/UL - Yokogawa Electric Corporation

MTU2 Series

Isolated 2W Single & Dual Output SM DC/DC Converters

KDC_MTU2.C02 Page 1 of 9

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SELECTION GUIDE

Order Code1

Nominal Input

Voltage

Output

Voltage

Output Current

Load Regulation

(Typ.)

Load Regulation

(Max)

Ripple & Noise

(Typ.)3

Ripple & Noise

(Max.)3

Input Current at

Full Load

Efﬁciency (Min.)

Efﬁciency (Typ.)

Isolation

Capacitance

MTTF2

VVmA % 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

MTU2S1205MC 12 5 400 7.5 10 40 60 200 72 80 20 2207

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

MTU2D0512MC 5 ±12 ±83 8.5 11 15 35 460 79 85 19 2697

MTU2D1212MC 12 ±12 ±83 6.5 8 15 35 190 77 83 24 2452

INPUT CHARACTERISTICS

Parameter Conditions Min. Typ. Max. Units

Voltage range

Continuous operation, 3.3V input types 2.97 3.3 3.63

Continuous operation, 5V input types 4.5 5.0 5.5

Continuous operation, 12V input types 10.8 12.0 13.2

Continuous operation, 24V input types 21.6 24 26.4

Reﬂected ripple current All variants 10 mA p-p

ISOLATION CHARACTERISTICS

Parameter Conditions Min. Typ. Max. Units

Isolation voltage Flash tested for 1 minute 1000 VDC

Resistance Viso= 1000VDC 10 GΩ

OUTPUT CHARACTERISTICS

Parameter Conditions Min. Typ. Max. Units

Rated power TA=-40°C to 85°C 2.0 W

Voltage set point accuracy See tolerance envelope

Line regulation High VIN to low VIN

MTU2S0305MC 1.0 1.3 %/%

All other variants 1.0 1.2

GENERAL CHARACTERISTICS

Parameter Conditions Min. Typ. Max. Units

Switching frequency MTU2D0505MC 50 kHz

All other variants 70

ABSOLUTE MAXIMUM RATINGS

Input voltage VIN, MTU2S03 types 5.5V

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 sufﬁx 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.

All speciﬁcations typical at TA=25°C, nominal input voltage and rated output current unless otherwise speciﬁed.

FEATURES

Patent Protected

UL 60950 Recognised

Footprint over pins 0.69cm2

Single & dual isolated output

1kVDC Isolation “Hi Pot Test”

Efﬁciency up to 85% (Typ.)

MSL Level 1

Power density 3.403W/cm3

3.3V, 5V, 12V & 24V Input

5V,12V & 24V single & dual outputs

Custom solutions available

Multi-layer ceramic capacitors

PRODUCT OVERVIEW

The MTU2 series is a new range of miniature sur-

face mount, high performance 2W DC/DC convert-

ers. With a footprint reduction of over 50% from

the previous generations of 2W SMD DC/DC, the

MTU2 series offers 2W of available output power

over a wide temperature range. The MTU2 series

is more efﬁcient and offers improved regulation

performance for applications where a wide output

voltage variation can not be tolerated. The MTU2

series is pin compatible with the MTU2 series.

The devices are suitable for all applications where

high volume production is envisaged.

MTU2 Series

Isolated 2W Single & Dual Output SM DC/DC Converters

KDC_MTU2.C02 Page 2 of 9

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TEMPERATURE CHARACTERISTICS

Parameter Conditions Min. Typ. Max. Units

Speciﬁcation All output types -40 85

°C

Storage -50 125

Case temperature rise above ambient1 0305, 1205, 2405 30 45

All other variants 25 35

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

‘Hi Pot Test’, ‘Flash Tested’, ‘Withstand Voltage’, ‘Proof Voltage’, ‘Dielectric Withstand Volt-

age’ & ‘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 MTU2 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 MTU2 has been recognized 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 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.

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 materi-

als, construction and environment. The MTU2 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 test-

ing, 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 func-

tional isolation where the wire enamel insulation is always supplemented by a further

insulation system of physical spacing or barriers.

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 120°C. 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 deﬁned 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.

MTU2 Series

Isolated 2W Single & Dual Output SM DC/DC Converters

KDC_MTU2.C02 Page 3 of 9

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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.

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

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.

MTU2D1212MC, MTU2S2405MC & MTU2D0512MC MTU2D0505MC, MTU2S0505MC & MTU2S1205MC

MTU2S0305MC MTU2S0524MC

Output Load Current (%)

Output Voltage

100

5025 10

-3.9%

1.5%

-4.4%

1.8%

Output Load Current (%)

100

7550

25 10

10.2%

Output Voltage

1007550

13.7%

-7.6%

2.2%

5.7%

Output Voltage

Output Load Current (%)

10075

25 10

Output Voltage

9.4%

-5.1%

0.4%

8.9%

2.5%

MTU2 Series

Isolated 2W Single & Dual Output SM DC/DC Converters

KDC_MTU2.C02 Page 4 of 9

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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

µs

MTU2S0305MC 225

MTU2S0505MC 165

MTU2S0524MC 3900

MTU2S1205MC 90

MTU2S2405MC 90

MTU2D0505MC 200

MTU2D0512MC 880

MTU2D1212MC 390

MTU2 Series

Isolated 2W Single & Dual Output SM DC/DC Converters

KDC_MTU2.C02 Page 5 of 9

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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.

Inductor Capacitor

L, µH SMD Through Hole C, µF

MTU2S0305MC 4.7 82472C 11R472C 22

MTU2S0505MC 4.7 82472C 11R472C 22

MTU2S0524MC 47 82473C 11R473C 4.7

MTU2S1205MC 4.7 82472C 11R472C 22

MTU2S2405MC 4.7 82472C 11R472C 10

MTU2D0505MC 4.7 82472C 11R472C 22

MTU2D0512MC 47 82473C 11R473C 4.7

MTU2D1212MC 47 82473C 11R473C 4.7

CLoad

Power

Source

MTU2 Series

Isolated 2W Single & Dual Output SM DC/DC Converters

KDC_MTU2.C02 Page 6 of 9

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EFFICIENCY VS LOAD

3.3V INPUT 5V INPUT

12V INPUT 24V INPUT

0 102030405060708090100

Efficiency (%)

Load (%)

0 102030405060708090100

Efficiency (%)

Load (%)

MTU2D0505MC

MTU2D0512MC

MTU2S0505MC

MTU2S0524MC

0 102030405060708090100

Efficiency (%)

Load (%)

MTU2S1205MC

MTU2D1212MC

0 102030405060708090100

Efficiency (%)

Load (%)

MTU2 Series

Isolated 2W Single & Dual Output SM DC/DC Converters

KDC_MTU2.C02 Page 7 of 9

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TEMPERATURE DERATING

MTU2S0305MC MTU2S0505MC

MTU2S0524MC MTU2S1205MC

MTU2S2405MC MTU2D0505MC

MTU2D0512MC MTU2D1212MC

100

45 50 55 60 65 70 75 80 85

Load (%)

Ambient Temperature OC

100

45 50 55 60 65 70 75 80 85

Load (%)

Ambient Temperature OC

100

45 50 55 60 65 70 75 80 85

Load (%)

Ambient Temperature OC

100

45 50 55 60 65 70 75 80 85

Load (%)

Ambient Temperature OC

100

45 50 55 60 65 70 75 80 85

Load (%)

Ambient Temperature OC

100

45 50 55 60 65 70 75 80 85

Load (%)

Ambient Temperature OC

100

45 50 55 60 65 70 75 80 85

Load (%)

Ambient Temperature OC

100

45 50 55 60 65 70 75 80 85

Load (%)

Ambient Temperature OC

MTU2 Series

Isolated 2W Single & Dual Output SM DC/DC Converters

KDC_MTU2.C02 Page 8 of 9

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PACKAGE SPECIFICATIONS

MECHANICAL DIMENSIONS PIN CONNECTIONS

Single Output Types

Pin Function

1+V

3-V

4 NC

5OV

6+V

OUT

Dual Output Types

Pin Function

1+V

3-V

4-V

OUT

5OV

6+V

OUT

RECOMMENDED FOOTPRINT DETAILS TUBE OUTLINE DIMENSIONS

All dimensions in mm (inches) ±0.05mm (0.002”). Controlling dimension is mm. All pins on a 2.54mm (0.100”) pitch. Weight: 0.79g, typ.

Unless otherwise stated all dimensions in mm±0.25mm (inches).

Tube length: 520mm ±2.00 Tube Quantity: 60

x5 PINS

SEATING PLANE

1.56 [0.061]

(0.35 [0.014])

0.60 [0.024]

5.08±0.10 [0.200±0.004]

0.25 [0.010]

8.50 MAX [0.335]

8.40±0.45 [0.331±0.018]

1.80±0.20 [0.071±0.008]

8.20 [0.323]

2.54±0.10 [0.100±0.004]

1.80±0.20 [0.071±0.008]

0.10 [0.004] S

12.25 (0.482) MAX

0.75±0.15 (0.030±0.006)

6.50 (0.256)

2.54 (0.100)

2.60 (0.102)

1.00 (0.039)

MTU2 Series

Isolated 2W Single & Dual Output SM DC/DC Converters

KDC_MTU2.C02 Page 9 of 9

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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

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

Product Orientation

Pin 1, located nearest to

carrier drive sprocket.

Reel Quantity: 400 pcs.

DIRECTION OF UNREELING

16.00±0.10 (0.630)

24.00±0.30 (0.945±0.012)

11.50±0.1

(0.453)

1.75±0.1

(0.069)

2.00±0.1 (0.079)

4.00±0.1 (0.157)

9.00±0.1

8.50±0.1 (0.335)

8.70±0.1

(0.343)

1.50+0.10

-0.00

(0.059+0.004

-0.000)

0.50±0.05 (0.020)

TRAILER SECTION

160 (6.30) MIN

LEADER SECTION

400 (15.75) MIN

CARRIER TAPE START

100 (3.94) MIN

GOODS

ENCLOSURE

SECTION

XWWYY

MTU2S

0505

MTU2S

0505

MTU2S

0505

330

(12.99) MAX

100

(3.94) MIN

13.00±0.25

(0.51±0.009)

30.40 (1.20) MAX

(AT HUB SECTION)

24.40 (0.96)

2.00(+0.08)

-0.00 (0.00)