NTA Series
www.murata-ps.com
Isolated 1W Dual Output SM DC/DC Converters
SELECTION GUIDE
Nominal Input
Output Output Isolation
2
Input Current at Efciency MTTF
1
Order Code Voltage Current Capacitance
Voltage Rated Load
V V mA mA % pF kHrs
NTA0303MC 3.3 3.3 152 402 75 29 1005
NTA0305MC 3.3 5 100 388 78 30 399
NTA0309MC 3.3 9 55 405 75 34 827
NTA0312MC 3.3 12 42 390 77 40 375
NTA0315MC 3.3 15 33 392 77 42 206
NTA0503MC 5 3.3 152 259 77 31 964
FEATURES
NTA0505MC 5 5 100 290 69 33 1697
NTA0505MEC 5 5 100 251 80 42 367
RoHS compliant
NTA0509MC 5 9 55 267 75 38 682
Efciency up to 78%
NTA0512MC 5 12 42 260 77 44 343
Wide temperature performance at full NTA0515MC 5 15 33 256 78 43 188
NTA1205MC 12 5 100 121 69 50 559
1 Watt load, 40C to 85C
NTA1209MC 12 9 55 113 74 72 375
UL 94V-0 Package material
NTA1212MC 12 12 42 111 75 89 243
2
Footprint over pins 1.64cm
NTA1215MC 12 15 33 110 76 100 154
Lead frame technology
INPUT CHARACTERISTICS
3.3V, 5V & 12V Input
Parameter Conditions Min. Typ. Max. Units
Continuous operation, 3V input types 2.97 3.3 3.63
3.3V, 5V, 9V, 12V & 15V Output
Voltage range Continuous operation, 5V input types 4.5 5 5.5 V
Internal SMD construction
Continuous operation, 12V input types 10.8 12 13.2
Reected ripple current 41 50 mA p-p
Toroidal magnetics
1kVDC Isolation Hi Pot Test
ISOLATION CHARACTERISTICS
MTTF up to 2.1 Million hours
Parameter Conditions Min. Typ. Max. Units
Isolation voltage Flash tested for 1 second 1000 VDC
3
Power density 1.36W/cm
Resistance Viso= 1000VDC 10 G
No heatsink required
GENERAL CHARACTERISTICS
Custom solutions available
Parameter Conditions Min. Typ. Max. Units
Multi-layer ceramic capacitors
0312MC, 0315MC 100
Switching frequency 0303MC, 0305MC, 0503MC, 0505MEC 110 kHz
PRODUCT OVERVIEW
All other variants 115
The NTA series of miniature surface mounted
DC/DC Converters employ leadframe
ABSOLUTE MAXIMUM RATINGS
technology and transfer moulding techniques
Internal power dissipation 700mW
to bring all of the benets of IC style
Input voltage VIN, NTA03 types 5.5V
packaging to hybrid circuitry. Co-planarity of the
Input voltage VIN, NTA05 types 7V
lead positions is based upon IEC 191-6:1990. The
Input voltage VIN, NTA12 types 15V
devices are suitable for all applications where
1. If components are required in tape and reel format sufx order code code with -R, e.g. NTA0505MC-R.
high volume production is envisaged.
2. Calculated using MIL-HDBK-217F with nominal input voltage at full load.
All specications typical at TA=25C, nominal input voltage and rated output current unless otherwise specied.
For full details go to
www.murata-ps.com/rohs
www.murata-ps.com/support
KDC_NTA.I07 Page 1 of 6NTA Series
Isolated 1W Dual Output SM DC/DC Converters
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 1.2 %/%
10% load to rated load, 0303MC & 0503MC 10 15
10% load to rated load, 5V output types 10 12
10% load to rated load, 0309MC 9.0 10
1
Load Regulation 10% load to rated load, 0509MC & 1209MC 6.5 8.0 %
10% load to rated load, 0312MC & 0315MC 11 14
10% load to rated load, 0512MC & 1212MC 6.0 8.5
10% load to rated load, 0515MC & 1215MC 6.0 7.0
BW=DC to 20MHz, 3.3V output types, NTA0305MC & NTA0505MEC 40 80
BW=DC to 20MHz, all other 5V output types 50 100
Ripple and Noise BW=DC to 20MHz, 9V output types 35 80 mV p-p
BW=DC to 20MHz, 12V output types 50 110
BW=DC to 20MHz, 15V output types 65 110
TEMPERATURE CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Specication All output types -40 85
Storage -55 125
0305MC, 0505MEC, 0312MC, 0315MC 19
C
Case temperature rise above 0303MC, 0309MC, 0503MC 25
ambient
0505MC, 1205MC 46
All other variants 35
Cooling Free air convection
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 specied time, across a component designed to provide electrical isolation, to verify the integrity of that isolation.
Murata Power Solutions NTA 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?
For a part holding no specic agency approvals, such as the NTA series, 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 NTA 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 testing, but if it is absolutely required, that the voltage be reduced by 20% from specied test voltage.
This consideration equally applies to agency recognized 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.
TEMPERATURE DERATING GRAPH
1.5
85C
1.0
0.5 Safe Operating Area
0
-40 100 150
0 50
Ambient Temperature (C)
1. 12V input types have typically 3% less load regulation change.
www.murata-ps.com/support
KDC_NTA.I07 Page 2 of 6
Output Power (W)