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MTU1 Series
Isolated 1W Single Output SM DC/DC Converters
SELECTION GUIDE
Efficiency (Min.) Input Current at Full Load Efficiency (Typ.)
Load Regulation (Typ.) Load Regulation (Max)
Output Current
Nominal Input Voltage
Ripple & Noise (Typ.)3
Ripple & Noise (Max.)3
Isolation Capacitance pF
19 20 21 22 22 31 40 35
Output Voltage
Order Code1
V
MTU1S0505MC MTU1S0509MC MTU1S0512MC MTU1S0515MC MTU1S1205MC MTU1S1209MC MTU1S1212MC MTU1S1215MC 5 5 5 5 12 12 12 12
V
5 9 12 15 5 9 12 15
mA
200 111 83 67 200 111 83 67 7.3 6.1 5.6 5.3 5.6 3.9 3.5 3.2
% 9 7.5 7.5 6.5 8 6 6 5
FEATURES
Patent Pending Footprint over pins 0.69cm2 Single isolated output 1kVDC Isolation Efficiency up to 88% (Typ.) MSL Level 1 Power density 1.71W/cm3 Wide temperature performance at full 1 Watt load, -40C to 85C UL 94V-0 Package material 5V & 12V Input 5V, 9V, 12V & 15V output Toroidal magnetics Custom solutions available Multi-layer ceramic capacitors
mVp-p 35 60 15 25 15 25 15 25 20 40 15 25 10 25 10 25
mA
241 233 230 230 99 96 95 95
%
80 83 84 84 80 82 83 84
%
83 86 87 87 84 87 88 88
kHrs
5664 5488 5186 4773 5641 5467 5165 4753
INPUT CHARACTERISTICS
Parameter
Voltage range Reflected ripple current
Conditions
Continuous operation, 5V input types Continuous operation, 12V input types 5V input types 12V input types
Min.
4.5 10.8
Typ.
5.0 12.0 6 5
Max.
5.5 13.2
Units V
mA p-p
ISOLATION CHARACTERISTICS
Parameter
Isolation voltage Resistance
Conditions
Flash tested for 1 second Viso= 1000VDC
Min.
1000 10
Typ.
Max.
Units
VDC G
GENERAL CHARACTERISTICS
Parameter
Switching frequency
Conditions
5V input types 12 input types
Min.
Typ.
82 90
Max.
Units
kHz
PRODUCT OVERVIEW
The MTU1 series is a new range of miniature surface mount, high performance 1W DC/DC converters. With a footprint reduction of over 50% from the previous generation of 1W SMD DC/DC, the MTU1 series offers 1W of available output power over the full industrial temperature range of -40C to 85C. The MTU1 series is more efficient and offers improved regulation performance for applications where a wide output voltage variation can not be tolerated. The devices are suitable for all applications where high volume production is envisaged.
ABSOLUTE MAXIMUM RATINGS
Input voltage VIN, MTU1S05 types Input voltage VIN, MTU1S12 types 7V 15V
OUTPUT CHARACTERISTICS
Parameter
Rated power
Voltage set point accuracy
Conditions
TA=-40C to 85C See tolerance envelope High VIN to low VIN
Min.
Typ.
Max.
1.0
Units
W %/%
Line regulation
1.0
1.1
TEMPERATURE CHARACTERISTICS
Parameter
Specification Storage Case temperature rise above ambient4 Cooling
Conditions
All output types
Min.
-40 -55
Typ.
Max.
85 125
Units
C
All types Free air convection
12
1. If components are required in tape and reel format suffix order code with -R, e.g. MTU10505MC-R. 2. Calculated using MIL-HDBK-217 FN2 calculation model with nominal input voltage at full load. 3. See ripple & noise characterisation method. 4. Measured after 1 hour continuous operation at nominal VIN full load at the center of each PCB. All specifications typical at TA=25C, nominal input voltage and rated output current unless otherwise specified.
For full details go to www.murata-ps.com/rohs
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2011-02-01
KDC_MTU.A03 Page 1 of 6
MTTF2
MTU1 Series
Isolated 1W Single Output SM DC/DC Converters
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 specified time, across a component designed to provide electrical isolation, to verify the integrity of that isolation. Murata Power Solutions MTU1 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 specific agency approvals, such as the MTU1 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 MTU1 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 specified 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
TOLERANCE ENVELOPES
5V output types All other types
5%
Output Voltage
1.5
5.5%
Output Power (W)
Output Voltage
1.0 0.5 0 -40
85C
1.5% VNOM 0%
VNOM
1% 0%
Safe Operating Area
100 50 0 Ambient Temperature (C)
150
10
25
50
75
-4% 100
10
25
50
75
-4% 100
Output Load Current (%)
Output Load Current (%)
The voltage tolerance envelope shows typical load regulation characteristics for this product series. The tolerance envelope is the maximum output voltage variation due to changes in output loading.
RoHS COMPLIANCE INFORMATION
This series is compatible with RoHS soldering systems with a peak reflow solder temperature of 245C as per J-STD-020D. 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/JEDEC STD-020D. The product series passed electrical tests and visual inspection criteria. For further information, please visit: www.murata-ps.com/rohs
1. Measured on centre of input side PCB.
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2011-02-01
KDC_MTU.A03 Page 2 of 6
MTU1 Series
Isolated 1W Single Output SM DC/DC Converters
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 2.2s and output capacitance of 10F, are shown in the table below. The product series will start into a capacitance of 47F with an increased start time, however, the maximum recommended output capacitance is 10F. Start-up time ms 0.9 2.7 4.3 7.5 0.9 1.9 3.3 4.7
Typical Start-Up Wave Form
MTU1S0505MC MTU1S0509MC MTU1S0512MC MTU1S0515MC MTU1S1205MC MTU1S1209MC MTU1S1212MC MTU1S1215MC
Ripple & Noise Characterisation Method
Ripple and noise measurements are performed with the following test configuration.
1F X7R multilayer ceramic capacitor, voltage rating to be a minimum of 3 times the output voltage of the DC/DC converter 10F 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 C2 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.
C1
Differential Mode Noise Test Schematic
DC/DC Converter OSCILLOSCOPE
C1 C2 C3 +
SUPPLY Input
R1
T1
R2
Y INPUT
+
Output
-
-
R LOAD
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2011-02-01
KDC_MTU.A03 Page 3 of 6
MTU1 Series
Isolated 1W Single Output SM DC/DC Converters
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.
L Power Source
DC
C Load
DC
L, H MTU1S0505MC MTU1S0509MC MTU1S0512MC MTU1S0515MC MTU1S1205MC MTU1S1209MC MTU1S1212MC MTU1S1215MC
Inductor SMD
Through Hole
Capacitor C, F
TBD
EFFICIENCY VS LOAD MTU1S05xxMC
90 80 70 Efficiency (%) 60 50 40 30 20 10 0 0 10 20 30 40 50 60 Load (%) 70 80 90 100
Efficiency (%)
MTUS12xxMC
90 80
15V 12V 9V 5V
70 60 50 40 30 20 10 0 0 10 20 30 40
15V 12V 9V 5V
50 60 Load (%)
70
80
90
100
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Technical enquiries email: mk@murata-ps.com, tel: +44 (0)1908 615232
2011-02-01
KDC_MTU.A03 Page 4 of 6
MTU1 Series
Isolated 1W Single Output SM DC/DC Converters
PACKAGE SPECIFICATIONS
MECHANICAL DIMENSIONS - Patent Pending
8.20 (0.323) 2.54 (0.100) 4 6 5
PIN CONNECTIONS Pin
1 3 4 5 6
Function
+VIN -VIN +VOUT OV NC
1 1.56 (0.061) 5.08 (0.200)
3 8.400.45 (0.3310.018)
8.50 +0.00( 0.335+0.000 ) -0.20 -0.008 S SEATING PLANE
0.35 (0.014) (Typ.)
0.600.1 (0.024)
0.250.1 (0.01) x5 PINS c 0.10 (0.004) S
1.800.2 (0.071) 1.800.2 (0.071)
All dimensions in mm 0.25mm (inches 0.01). All pins on a 2.54 (0.1) pitch and within 0.25 (0.01) of true position.
Weight: 0.75g
RECOMMENDED FOOTPRINT DETAILS
6.50 (0.256)
TUBE OUTLINE DIMENSIONS
12.25 (0.482) MAX
2.54 (0.100)
2.54 (0.100)
0.750.15 (0.0300.006) 12.25 (0.482) MAX
1.00 (0.039)
2.60 (0.102)
Unless otherwise stated all dimensions in mm0.25mm (inches). Tube length: 520mm 2.00
Tube Quantity: 60
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Technical enquiries email: mk@murata-ps.com, tel: +44 (0)1908 615232
2011-02-01
KDC_MTU.A03 Page 5 of 6
MTU1 Series
Isolated 1W Single Output SM DC/DC Converters
TAPE & REEL SPECIFICATIONS
REEL OUTLINE DIMENSIONS
330 (12.99) MAX
TAPE OUTLINE DIMENSIONS
8.700.1 (0.343) 0.500.05 (0.020)
100 O (3.94) MIN
2.00(+0.08) (AT HUB SECTION) 24.40 (0.96) -0.00 (0.00)
01.50 +0.10(00.059+0.004 -0.00 -0.000)
DIRECTION OF UNREELING
16.000.10 (0.630)
13.000.25 O (0.510.009)
2.000.1 (0.079)
30.40 (1.20) MAX
8.500.1 (0.335)
4.000.1 (0.157) 1.750.1 (0.069) 11.500.1 (0.453) 24.000.30 (0.9450.012) 9.000.1
REEL PACKAGING DETAILS
MTU1S 0509
MTU1S 0509
MTU1S 0509
XWWYY
TRAILER SECTION 160 (6.30) MIN
Product Orientation Pin 1, located nearest to carrier drive sprocket. Reel Quantity: 300 pcs.
GOODS ENCLOSURE SECTION
XWWYY
XWWYY
CARRIER TAPE START 100 (3.94) MIN LEADER SECTION 400 (15.75) MIN
Murata Power Solutions, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A.
ISO 9001 and 14001 REGISTERED
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 notice. (c) 2011 Murata Power Solutions, Inc.
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2011-02-01
KDC_MTU.A03 Page 6 of 6

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