MTU2D0512MC

MTU2D0512MC product overview and MTU2 series positioning

Murata Power Solutions MTU2D0512MC is an isolated 2W DC-DC converter in the MTU2 series, designed as a miniature surface-mount module with dual outputs of +12V and -12V from a nominal 5V input. The device is specified for operation across a 4.5V to 5.5V input range and delivers up to 83mA on each output.

Within the Murata Power Solutions MTU2 family, the MTU2D0512MC belongs to the dual-output variants. The series is described as a range of miniature, high-performance 2W DC-DC converters that combines reduced footprint, improved regulation, and high efficiency. Murata states that the MTU2 family provides over 50% footprint reduction compared with previous generations of 2W SMD DC-DC converters while maintaining 2W output capability across a wide temperature range.

The MTU2D0512MC uses a surface-mount 6-SMD module format and is intended for commercial ITE applications. The converter is also RoHS compliant, REACH unaffected, and rated MSL 1.

MTU2D0512MC key electrical specifications and output architecture

The basic configuration of the MTU2D0512MC is a dual isolated output converter with the following principal ratings:

Nominal input voltage: 5V

Input voltage range for continuous operation: 4.5V to 5.5V

Outputs: +12V and -12V

Maximum output current: 83mA per output

Rated output power: 2W

Isolation test voltage: 1000VDC

Typical efficiency: 85%

Operating temperature range: -40°C to 85°C

Because the MTU2D0512MC is a dual-output isolated converter, it is suited to designs that require symmetrical positive and negative rails derived from a low-voltage input supply. A common example is a board powered from a regulated 5V backplane that also needs isolated bipolar rails for signal-conditioning circuits or interface stages. In that situation, the MTU2D0512MC can generate the ±12V rails directly without requiring two separate converter stages.

The module switching frequency for the MTU2D0512MC is listed under the general characteristics for all variants other than MTU2D0505MC at 70kHz typ.

MTU2D0512MC input range, output capability, and efficiency characteristics

The MTU2D0512MC is intended for 5V systems and supports continuous operation from 4.5V to 5.5V. This allows compatibility with regulated 5V rails while preserving converter operation across normal supply tolerance.

For full-load operation, the selection guide lists the nominal input current for the 5V, ±12V model at 460mA. At the output side, each rail can supply up to 83mA. Since the converter is rated at 2W total, the positive and negative rails are part of the same overall power budget.

Efficiency for the MTU2D0512MC is specified as 79% minimum and 85% typical. That efficiency level influences both input current and thermal rise. In practical board design, this means a 2W isolated rail can be generated from a 5V source without the thermal penalty associated with lower-efficiency converter topologies.

The datasheet’s efficiency-versus-load plot for 5V input variants shows that efficiency changes with loading, so designs running well below full load should account for the corresponding efficiency behavior rather than relying only on the full-load typical number.

MTU2D0512MC isolation behavior, insulation limits, and high-potential test guidance

Isolation is one of the main functional characteristics of the MTU2D0512MC. Murata specifies an isolation voltage of 1000VDC, flash tested for 1 minute in the isolation characteristics table, while the technical notes state that all MTU2 series converters are 100% production tested at 1kVDC for 1 second.

The documentation explains how this figure should be interpreted. The test voltage is used to verify the integrity of the isolation barrier and to demonstrate immunity to transient voltage stress. It is not a statement that the converter should be used as a safety isolation barrier at that voltage during continuous operation.

The MTU2 series, including the MTU2D0512MC, is recognized by Underwriters Laboratory for functional insulation. Murata states that both input and output should normally be maintained within SELV limits, defined in the document as less than 42.4V peak or 60VDC.

The documentation also gives a caution about repeated high-voltage isolation testing. The MTU2 series uses toroidal isolation transformers with no additional insulation between primary and secondary windings beyond enamelled wire insulation. Repeated application of high test voltage can gradually degrade the insulation system. For that reason, Murata advises against repeated high-voltage testing. If such testing is unavoidable, the applied voltage should be reduced by 20% from the specified test voltage.

This distinction is useful in practice. For example, when validating an assembled board, an engineer may be tempted to repeat hipot tests at the converter’s nominal isolation rating during multiple production stages. The documentation indicates that such a process can reduce long-term insulation robustness, so any production-screening method should account for that limitation.

MTU2D0512MC regulation, ripple, noise, and performance under load

The MTU2D0512MC is positioned as a converter with improved regulation performance for applications where wide output voltage variation cannot be tolerated. In the selection guide, the dual 5V-input, ±12V-output version is specified with:

Typical load regulation: 8.5%

Maximum load regulation: 11%

Typical ripple and noise: 15mVp-p

Maximum ripple and noise: 35mVp-p

Line regulation for all variants other than MTU2S0305MC is given as 1.0% typical and 1.2% maximum for high-VIN to low-VIN change.

Murata also provides a tolerance envelope showing typical output-voltage variation versus output-load current for the MTU2D0512MC along with MTU2D1212MC and MTU2S2405MC. In that graph, the MTU2D0512MC family grouping shows positive deviation at light load and negative deviation as load approaches full scale. This reflects the behavior of many isolated converter modules, where output voltage can rise noticeably as load decreases.

Ripple and noise measurement method is also explicitly defined. The datasheet uses a test setup with 10µF tantalum and 100nF ceramic capacitors, a 450Ω resistor, 50Ω BNC termination, ferrite toroid coupling, and resistive loading to the converter’s maximum power rating. Measured values are multiplied by 10 to obtain the specified values. Since ripple results depend strongly on measurement technique, the inclusion of the test circuit helps align bench measurements with datasheet expectations.

MTU2D0512MC thermal operating range, derating behavior, and temperature-related considerations

The MTU2D0512MC operates over an ambient temperature range of -40°C to 85°C under the specification conditions given by Murata. Storage temperature range is -50°C to 125°C.

Case temperature rise above ambient for the MTU2D0512MC falls into the “all other variants” category, specified at 25°C typical and 35°C maximum under free-air convection. The datasheet notes that this rise is measured after one hour of continuous operation at nominal input voltage and full load, at the center of each PCB.

Thermal derating information is presented separately for each model. For the MTU2D0512MC, the derating graph shows full load available up to the upper part of the operating range, followed by reduced maximum load as temperature increases toward 100°C. Although the formal operating specification is capped at 85°C, the graph provides additional visibility into thermal margin trends above that point.

Murata also states in the safety approval section that the MTU2 series is recognized to UL 60950 for functional insulation up to a maximum product PCB temperature of 120°C, and that forced-air cooling may be used to maintain this requirement. This means thermal design should evaluate not only ambient air temperature but also local PCB heating from nearby components and airflow conditions.

MTU2D0512MC startup, minimum-load behavior, and capacitive loading limits

Murata specifies that the minimum load required to meet datasheet specifications is 10% of full rated load across the specified input voltage range. Below that threshold, output voltage increases. If the load falls below 5%, the output may rise to typically double the specified output voltage.

For the MTU2D0512MC, that means each output should be loaded sufficiently for regulated operation to remain within expected limits. In a real circuit, if one or both rails are only lightly used during standby or fault conditions, the no-load rise should be considered during component voltage selection.

Typical startup time for the MTU2D0512MC is listed as 88µs with a typical input voltage rise time of 2.2µs and output capacitance of 10µF. The series will start into a capacitance of 47µF with increased startup time, but the maximum recommended output capacitance is 10µF.

This startup behavior can affect system sequencing. For instance, if the ±12V rails are feeding op-amps or interface devices with limited overvoltage tolerance during light-load startup, both the minimum-load requirement and the output-capacitance recommendation should be reflected in the surrounding circuit design.

MTU2D0512MC output ripple reduction methods and external component selection

For applications requiring lower output ripple than the standard converter specification, Murata provides a ripple reduction network for the MTU2D0512MC. By using the recommended inductor and capacitor values, output ripple at rated load can be reduced to 5mVp-p maximum.

For the MTU2D0512MC, the recommended components are:

Inductor: 47µH

Suggested SMD inductor: 82473C

Suggested through-hole inductor: 11R473C

Capacitor: 4.7µF

The component-selection notes add further constraints:

For the capacitor, low ESR is preferred, and ceramic types are recommended. The voltage rating should be at least twice the rated output voltage of the converter, except for 15V outputs.

For the inductor, the rated current should not be less than the output current of the converter.

At rated current, the inductor DC resistance should produce a voltage drop of less than 2% of the rated converter output voltage.

The inductor self-resonant frequency should be greater than 20MHz.

The datasheet illustrates the filtering arrangement on both positive and negative outputs. In practice, this allows designers to trade a small amount of external circuitry for lower ripple, which can be useful in analog front ends, data-conversion support rails, or noise-sensitive interface sections.

MTU2D0512MC packaging, mechanical format, and manufacturing compatibility

The MTU2D0512MC is supplied in a surface-mount 6-SMD module package. Its dimensions are listed as 0.33in × 0.32in × 0.34in, equivalent to 8.4mm × 8.2mm × 8.5mm. Murata also highlights a footprint over pins of 0.69cm² and a power density of 3.403W/cm³ for the series.

The product is compatible with RoHS soldering systems with a peak reflow solder temperature of 245°C in accordance with J-STD-020D.1. The termination finish is matte tin over nickel preplate. The series is also backward compatible with Sn/Pb soldering systems.

With MSL 1 classification, the MTU2D0512MC supports standard moisture-handling expectations for surface-mount assembly. Samples were tested per the MSL 1 conditioning defined in J-STD-020D.1 and passed both electrical and visual inspection criteria according to the datasheet.

MTU2D0512MC safety recognition, fuse guidance, and compliance information

The MTU2D0512MC is part of the MTU2 series recognized by Underwriters Laboratory to UL 60950 for functional insulation. The applicable file number given is E151252.

Murata notes that the MTU2 series is not internally fused. To meet UL 60950 requirements, an anti-surge input line fuse should always be used. For 5V input types such as the MTU2D0512MC, the specified fuse rating is 0.63A.

Environmental and export-related classifications listed for the device include:

RoHS compliant

REACH unaffected

ECCN: EAR99

HTSUS: 8504.40.9580

These data points support design review and compliance documentation where component-level environmental and export classifications are needed.

MTU2D0512MC part-number structure and series context within the Murata Power Solutions MTU2 family

Murata provides a part-number structure for the MTU2 family:

MTU 2 X XX XX M C -RXX

In this structure:

MTU identifies the series name

2 indicates the power rating

The output type position uses S for single, D for dual, and T for triple

The following fields indicate input voltage and output voltage

M identifies the surface-mount package type

C indicates RoHS compliance

Optional suffixes such as -R7 and -R13 refer to reel packaging

Applied to MTU2D0512MC:

MTU = series

2 = 2W family

D = dual output

05 = 5V nominal input

12 = 12V output designation

M = surface mount

C = RoHS compliant

The broader MTU2 series includes both single and dual output options across 3.3V, 5V, 12V, and 24V nominal input families. That context helps place the MTU2D0512MC as the 5V-input, dual ±12V member of the series.

Conclusion

Murata Power Solutions MTU2D0512MC is a compact isolated 2W DC-DC converter that generates ±12V outputs from a 5V input in a 6-SMD surface-mount package. Its datasheet defines a 4.5V to 5.5V operating input range, 83mA output capability per rail, 1000VDC isolation test rating, and 85% typical efficiency. The documentation also gives practical design guidance covering minimum load, startup into capacitive loads, thermal derating, ripple measurement, optional output filtering, fuse selection, and limitations associated with repeated high-voltage isolation testing.

Taken together, these details describe not only the converter’s headline specifications but also the conditions under which the MTU2D0512MC delivers its stated performance on a finished PCB.

Frequently Asked Questions (FAQ)

Q1. What is the input voltage range of the Murata Power Solutions MTU2D0512MC?

A1. The MTU2D0512MC is specified for continuous operation from 4.5V to 5.5V, with 5V as the nominal input.

Q2. What outputs does the MTU2D0512MC provide?

A2. The MTU2D0512MC provides dual isolated outputs of +12V and -12V.

Q3. How much output current can the MTU2D0512MC deliver?

A3. The maximum output current is 83mA on the +12V output and 83mA on the -12V output.

Q4. What is the total output power rating of the MTU2D0512MC?

A4. The MTU2D0512MC is rated for 2W total output power.

Q5. Is the MTU2D0512MC an isolated converter?

A5. Yes. The MTU2D0512MC is an isolated DC-DC converter in the Murata Power Solutions MTU2 series.

Q6. What isolation voltage is specified for the MTU2D0512MC?

A6. The isolation characteristic is specified as 1000VDC. The technical notes state that MTU2 series converters are production tested at 1kVDC for 1 second.

Q7. Can the MTU2D0512MC be used as a safety isolation barrier?

A7. The documentation describes the MTU2 series as recognized for functional insulation, not as a safety isolation element. The stated isolation test voltage is for verifying barrier integrity and transient withstand, not for continuous safety isolation use at that level.

Q8. What continuous voltage levels should normally be maintained across the MTU2D0512MC isolation barrier?

A8. Murata states that both input and output should normally be maintained within SELV limits, defined in the document as less than 42.4V peak or 60VDC.

Q9. Should repeated hipot or high-voltage isolation tests be performed on the MTU2D0512MC?

A9. Murata advises against repeated high-voltage isolation testing because it can degrade the isolation capability over time. If such testing is absolutely required, the applied voltage should be reduced by 20% from the specified test voltage.

Q10. What is the typical efficiency of the MTU2D0512MC?

A10. The MTU2D0512MC has 85% typical efficiency and 79% minimum efficiency.

Q11. What is the typical switching frequency of the MTU2D0512MC?

A11. The typical switching frequency for the MTU2D0512MC is 70kHz.

Q12. What are the typical ripple and noise figures for the MTU2D0512MC?

A12. Typical ripple and noise is 15mVp-p, and the maximum specified ripple and noise is 35mVp-p.

Q13. What is the typical load regulation of the MTU2D0512MC?

A13. The MTU2D0512MC is specified with 8.5% typical load regulation and 11% maximum load regulation.

Q14. What is the line regulation of the MTU2D0512MC?

A14. For all variants other than MTU2S0305MC, line regulation from high VIN to low VIN is 1.0% typical and 1.2% maximum. That includes the MTU2D0512MC.

Q15. What is the operating temperature range of the MTU2D0512MC?

A15. The specified operating temperature range is -40°C to 85°C.

Q16. What is the storage temperature range of the MTU2D0512MC?

A16. The storage temperature range is -50°C to 125°C.

Q17. How much case temperature rise should be expected with the MTU2D0512MC?

A17. For the MTU2D0512MC, which falls under the “all other variants” category, case temperature rise above ambient is specified as 25°C typical and 35°C maximum under free-air convection.

Q18. Does the MTU2D0512MC require a minimum load?

A18. Yes. To meet datasheet specifications, the minimum load is 10% of full rated load across the specified input voltage range.

Q19. What happens if the MTU2D0512MC is operated below its minimum load?

A19. The output voltage will increase. If the load falls below 5%, the output may rise to typically double the specified output voltage.

Q20. What is the typical startup time of the MTU2D0512MC?

A20. The typical startup time is 88µs, based on a typical input voltage rise time of 2.2µs and 10µF output capacitance.

Q21. How much output capacitance can the MTU2D0512MC start into?

A21. The series will start into 47µF with increased startup time, but the maximum recommended output capacitance is 10µF.

Q22. Can output ripple of the MTU2D0512MC be reduced with external components?

A22. Yes. Murata provides a ripple reduction network that can reduce output ripple to 5mVp-p maximum at rated load when the recommended external inductor and capacitor are used.

Q23. What ripple reduction components are recommended for the MTU2D0512MC?

A23. The recommended values are a 47µH inductor and a 4.7µF capacitor. Suggested inductor part references in the datasheet are 82473C for SMD and 11R473C for through-hole.

Q24. What capacitor characteristics are recommended when filtering the MTU2D0512MC output?

A24. Murata recommends low-ESR capacitors, with ceramic types preferred. The voltage rating should be at least twice the rated output voltage of the converter, except for 15V outputs.

Q25. What inductor characteristics are recommended when filtering the MTU2D0512MC output?

A25. The inductor rated current should be at least equal to the converter output current. Its DC resistance should keep voltage drop below 2% of the rated output voltage, and its self-resonant frequency should be above 20MHz.

Q26. What package style does the MTU2D0512MC use?

A26. The MTU2D0512MC is supplied in a surface-mount 6-SMD module package.

Q27. What are the dimensions of the MTU2D0512MC?

A27. The module size is 0.33in × 0.32in × 0.34in, or 8.4mm × 8.2mm × 8.5mm.

Q28. Is the MTU2D0512MC suitable for reflow soldering?

A28. Yes. The MTU2 series is compatible with RoHS soldering systems with a peak reflow temperature of 245°C per J-STD-020D.1. It is also backward compatible with Sn/Pb soldering systems.

Q29. What is the moisture sensitivity level of the MTU2D0512MC?

A29. The MTU2D0512MC is rated MSL 1.

Q30. What terminal finish is used on the MTU2D0512MC?

A30. The pin termination finish is matte tin over nickel preplate.

Q31. Is the MTU2D0512MC internally fused?

A31. No. The MTU2 series is not internally fused.

Q32. What input fuse is recommended for the MTU2D0512MC?

A32. For 5V input types such as the MTU2D0512MC, Murata specifies a 0.63A anti-surge input line fuse to meet UL 60950 requirements.

Q33. What safety standard recognition applies to the MTU2D0512MC?

A33. The MTU2 series is recognized by Underwriters Laboratory to UL 60950 for functional insulation, with file number E151252.

Q34. Is the MTU2D0512MC RoHS compliant?

A34. Yes. The device is listed as RoHS compliant.

Q35. What is the REACH status of the MTU2D0512MC?

A35. The device is listed as REACH unaffected.

Q36. How is the MTU2D0512MC model name interpreted?

A36. In the Murata part-number structure, MTU identifies the series, 2 indicates 2W, D indicates dual output, 05 indicates 5V input, 12 indicates the output-voltage designation, M identifies surface mount, and C indicates RoHS compliance.