MTC1 Series
Isolated 1W SM 2:1 Input Single Output DC-DC Converters
KDC_MTC1.E01 Page 1 of 12
All enquiries: www.murata-ps.com/support
www.murata-ps.com
For full details go to
www.murata-ps.com/rohs
　
www.murata-ps.com
SELECTION GUIDE
Order Code1
Input
Voltage
Output
Voltage
Output
Current
Rated Input
Current
Efficiency Ripple and
Noise MTTF2
Nom. Min. Typ. Typ. Max. MIL Telecordia
V V mA mA % % mVp/p mVp/p kHrs kHrs
MTC1S1203MC 12 3.3 303 110 72 75 25 50 1143 17407
MTC1S1205MC 12 5 200 110 77 78.5 25 50 1129 17407
MTC1S1212MC 12 12 83 100 77 79 20 40 977 17407
MTC1S2403MC 24 3.3 303 55 73 75.5 30 55 1042 17109
MTC1S2405MC 24 5 200 55 74 76.5 25 50 990 17109
MTC1S2412MC 24 12 83 55 75 77 25 50 833 17109
INPUT CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Voltage range
12V input types 9 12 18
V
24V input types 18 24 36
Input reflected ripple
current All variants 2 mA p-p
ISOLATION CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Isolation test voltage Production tested for 1 second 3000 VAC
Qualification tested for 1 minute 3000 VAC
Isolation capacitance All variants 7 pF
Resistance Viso = 1kVDC 1 GΩ
OUTPUT CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Rated power All output types 1 W
Minimal load to meet datasheet specification 10 %
Voltage set point accuracy 3V, 5V output types -2.5 2 %
12V output types -3 2
Line regulation Low line to high line ±0.05 ±0.2 %
Load regulation All output types ±0.25 ±0.5 %
Transient response
Peak deviation (25-75%
& 75-25% swing)
2403 variant ±4
%Vout
2405 variant ±3
All other variants ±2
Settling time
(within 5% Vout Nom.)
1203 220
s
1205 260
1212, 2403 & 2405 100
2412 70
1. Components are supplied in tape and reel packaging, please refer to package specification section. Orderable part numbers are
MTC1SXXXXMC-R7 (30 pieces per reel), or MTC1SXXXXMC-R13 (150 pieces per reel)
2. Calculated using MIL-HDBK-217 FN2 and Telecordia SR-332 calculation model with nominal input voltage at full load.
All specifications typical at TA=25°C, nominal input voltage and rated output current unless otherwise specified.
FEATURES
UL 60950 recognised for reinforced
insulation
ANSI/AAMI ES60601-1, 1 MOPP/ 2 MOOPs
recognised
3kVAC isolation test voltage ‘Hi Pot Test’
Continuous short circuit protection
Output Voltage Trim
Remote on/off pin
No electrolytic capacitors
Operating temperature range -40°C to
100°C
2:1 Input Range
PRODUCT OVERVIEW
The MTC1 series of miniature surface mount DC-
DC converters offers a single output voltage from
input voltage ranges of 9-18V and 18-36V. The
MTC1 series regulated output voltage is adjust-
able by ±10% and a remote on/off pin is also
included for application power saving.
The MTC1 ideally suited to applications which
include medical. Industrial, telecommunications,
battery powered systems, and process automa-
tion.
MTC1 Series
Isolated 1W SM 2:1 Input Single Output DC-DC Converters
KDC_MTC1.E01 Page 2 of 12
All enquiries: www.murata-ps.com/support
www.murata-ps.com
GENERAL CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Switching frequency
1203, 2405, 2403 variants 240
kHz
1205, 2412 variants 260
1212 variant 300
Remote on/off pin
Module on, pin unconnected or open collector floating
Module off (refer to application notes) 2 V
12V input types 1.5 mW
24V input types 3.9
TEMPERATURE CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Operation -40 100
°CStorage -50 125
Case temperature above ambient 100% Load, Nom VIN, Still Air 15
ABSOLUTE MAXIMUM RATINGS
Short-circuit protection (for SELV input voltages) Continuous
Remote on/off pin input voltage 6V
Input voltage, MTC1 12V input types 25V
Input voltage, MTC1 24V input types 40V
MTC1 Series
Isolated 1W SM 2:1 Input Single Output DC-DC Converters
KDC_MTC1.E01 Page 3 of 12
All enquiries: www.murata-ps.com/support
www.murata-ps.com
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 MTC1 series of DC-DC converters are all 100% production tested at 3kVAC for 1 second and have been qualification tested at 3kVAC for 1 minute.
A question commonly asked is, “What is the continuous voltage that can be applied across the part in normal operation?”
The MTC1 series has been recognised by Underwriters Laboratory to 250 Vrms Reinforced Insulation, please see safety approval section below.
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. 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.
SAFETY APPROVAL
ANSI/AAMI ES60601-1
The MTC1 series has been recognised by Underwriters Laboratory (UL) to ANSI/AAMI ES60601-1 and provides 1 MOPP (Means Of Patient Protection) and 2 MOOP (Means Of
Operator Protection) based upon a working voltage of 250 Vrms max., between Primary and Secondary. File number E202895 applies.
UL 60950
The MTC1 series has been recognised by Underwriters Laboratory (UL) to UL 60950 for reinforced insulation to a working voltage of 250 Vrms. File number E151252 applies.
Creepage and clearance is 5mm.
FUSING
The MTC1 Series of converters are not internally fused so to meet the requirements of UL an anti-surge input line fuse should always be used with ratings as defined below.
Input Voltage, 12V: 0.5A
Input Voltage, 24V: 0.25A
All fuses should be UL recognised and rated to 125V.
RoHS COMPLIANCE INFORMATION, MSL
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 Gold with Nickel Pre-plate. The series is backward compatible with Sn/Pb soldering systems. The series has a
Moisture Sensitivity Level (MSL) 1.
MTC1 Series
Isolated 1W SM 2:1 Input Single Output DC-DC Converters
KDC_MTC1.E01 Page 4 of 12
All enquiries: www.murata-ps.com/support
www.murata-ps.com
CHARACTERISATION TEST METHODS
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
+
+
-
-
APPLICATION NOTES
Maximum Output Capacitance
Output Voltage Maximum Load Capacitance
VF
3.3 470
5 470
12 220
Start-up times
Part No. Start-up times
ms
MTC1S1203MC 5
MTC1S1205MC 14
MTC1S1212MC 25
MTC1S2403MC 9
MTC1S2405MC 14
MTC1S2412MC 25
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 the maximum output capacitance with increased start times.
Maximum output capacitance should not exceed:
Typical Wave Form:
MTC1 Series
Isolated 1W SM 2:1 Input Single Output DC-DC Converters
KDC_MTC1.E01 Page 5 of 12
All enquiries: www.murata-ps.com/support
www.murata-ps.com
APPLICATION NOTES (Continued)
Control Pin
The MTC1 converters have a shutdown feature which enables the user to disable the converter into a low power state. The control pin connects to the base of an internal
NPN transistor with the converter shut down when the transistor is turned on by an external applied voltage. The converter can also be shut down using a 5V TTL signal (the
unit is OFF for logic High and ON for logic LOW). If the control pin is left open (high impedance), the converter will run normally. A suitable application circuit is shown below.
D1 (e.g. 1N4001) is necessary for correct operation of the MTC1 when the control
signal is LOW. The recommended drive current IB to shut down the MTC1 is 6mA
to 15mA. The value of R1 can be derived as follows:
R1 =
For a switch input:
Calculate the value of R1 from the above equation given switch voltage Vc and
chosen current between 6 and 15mA.
For 5V TTL Signal:
Set R1 to be between 320Ω to 800Ω.
Output Voltage Adjustment
The MTC1S series has a trim capability which is located at pin 3, this allows the user to independently adjust the output voltages by ±10%. Adjustments to the output
voltages can be accomplished via a single fixed resistor as shown in Figures 1 and 2. A single fixed resistor can increase or decrease the output voltage depending on its
connection. Fixed resistors should have low temperature coefficient to minimize sensitivity to changes in temperature.
A single resistor connected from the TRIM pin (pin 3) to the +Vout (pin 4), will decrease the output voltage which is shown in figure 1.
A single resistor connected from the TRIM pin (pin 3) to the -Vout (pin 2) will increase the output voltage which is shown in figure 2.
TRIM DOWN TRIM UP
Accuracy of adjustment is subject to tolerances of resistors and factory adjusted output accuracy. Vout is equal to the desired output voltage.
MTC1S
VIN
VC or
TTL
-VIN
CTRL
R1D1Q1
R2
VC - VD - 0.6
IB
Figure 1. Trim connections to decrease the output voltage Figure 2. Trim connections to increase the output voltage
RTRIM
3
2
4
5
6
1+Vin
-Vin
CTRL
-Vout
TRIM
+Vout
3.3VoutRTRIM =
5VoutRTRIM =
12VoutRTRIM =
18.64k x Vout - 52.3k
3.32 - Vout
33.2k x Vout - 141k
5 - Vout
21.5k x Vout - 171.29k
11.979 - Vout
RTRIM
3
2
4
5
6
1+Vin
-Vin
CTRL
-Vout
TRIM
+Vout
3.3VoutRTRIM =
5VoutRTRIM =
12VoutRTRIM =
14k x Vout - 52.3k
3.32 - Vout
23.2k x Vout - 141k
5 - Vout
12.4k x Vout - 171.29k
11.979 - Vout
MTC1 Series
Isolated 1W SM 2:1 Input Single Output DC-DC Converters
KDC_MTC1.E01 Page 6 of 12
All enquiries: www.murata-ps.com/support
www.murata-ps.com
EFFICIENCY VS LOAD
MTC1S1203MC MTC1S1205MC
MTC1S1212MC MTC1S2403MC
MTC1S2405MC MTC1S2412MC
0
10
20
30
40
50
60
70
80
90
0 20406080100
Efficiency (%)
Load (%)
18 Vin
24 Vin
36 Vin
0
10
20
30
40
50
60
70
80
90
0 20406080100
Efficiency (%)
Load (%)
9 Vin
12 Vin
18 Vin
0
10
20
30
40
50
60
70
80
90
0 20406080100
Efficiency (%)
Load (%)
9 Vin
12 Vin
18 Vin
0
10
20
30
40
50
60
70
80
90
0 20406080100
Efficiency (%)
Load (%)
9 Vin
12 Vin
18 Vin
0
10
20
30
40
50
60
70
80
90
0 20406080100
Efficiency (%)
Load (%)
18 Vin
24 Vin
36 Vin
0
10
20
30
40
50
60
70
80
90
0 20406080100
Efficiency (%)
Load (%)
18 Vin
24 Vin
36 Vin
MTC1 Series
Isolated 1W SM 2:1 Input Single Output DC-DC Converters
KDC_MTC1.E01 Page 7 of 12
All enquiries: www.murata-ps.com/support
www.murata-ps.com
TEMPERATURE DERATING
MTC1S1203MC - 12Vin MTC1S1205MC- 12Vin
MTC1S1212MC- 12Vin MTC1S2403MC- 24Vin
MTC1S2405MC- 24Vin MTC1S2412MC- 24Vin
0
20
40
60
80
100
120
70 75 80 85 90 95 100
Load, %
Temperature, C
No Airflow
100lfm
200lfm
400lfm
0
20
40
60
80
100
120
70 75 80 85 90 95 100
Load, %
Temperature, C
No Airflow
100lfm
200lfm
400lfm
0
20
40
60
80
100
120
70 75 80 85 90 95 100
Load, %
Temperature, C
No Airflow
100lfm
200lfm
400lfm
0
20
40
60
80
100
120
70 75 80 85 90 95 100
Load, %
Temperature, C
No Airflow
100lfm
200lfm
400lfm
0
20
40
60
80
100
120
70 75 80 85 90 95 100
Load, %
Temperature, C
No Airflow
100lfm
200lfm
400lfm
0
20
40
60
80
100
120
70 75 80 85 90 95 100
Load, %
Temperature, C
No Airflow
100lfm
200lfm
400lfm
MTC1 Series
Isolated 1W SM 2:1 Input Single Output DC-DC Converters
KDC_MTC1.E01 Page 8 of 12
All enquiries: www.murata-ps.com/support
www.murata-ps.com
TEMPERATURE DERATING
MTC1S1203MC - 9Vin MTC1S1205MC- 9Vin
MTC1S1212MC- 9Vin MTC1S2403MC- 18Vin
MTC1S2405MC- 18Vin MTC1S2412MC- 18Vin
0
20
40
60
80
100
120
70 75 80 85 90 95 100
Load, %
Temperature, C
No Airflow
100lfm
200lfm
400lfm
0
20
40
60
80
100
120
70 75 80 85 90 95 100
Load, %
Temperature, C
No Airflow
100lfm
200lfm
400lfm
0
20
40
60
80
100
120
70 75 80 85 90 95 100
Load, %
Temperature, C
No Airflow
100lfm
200lfm
400lfm
0
20
40
60
80
100
120
70 75 80 85 90 95 100
Load, %
Temperature, C
No Airflow
100lfm
200lfm
400lfm
0
20
40
60
80
100
120
70 75 80 85 90 95 100
Load, %
Temperature, C
No Airflow
100lfm
200lfm
400lfm
0
20
40
60
80
100
120
70 75 80 85 90 95 100
Load, %
Temperature, C
No Airflow
100lfm
200lfm
400lfm
MTC1 Series
Isolated 1W SM 2:1 Input Single Output DC-DC Converters
KDC_MTC1.E01 Page 9 of 12
All enquiries: www.murata-ps.com/support
www.murata-ps.com
TEMPERATURE DERATING
MTC1S1203MC - 18Vin MTC1S1205MC- 18Vin
MTC1S1212MC- 18Vin MTC1S2403MC- 36Vin
MTC1S2405MC- 36Vin MTC1S2412MC- 36Vin
0
20
40
60
80
100
120
70 75 80 85 90 95 100
Load, %
Temperature, C
No Airflow
100lfm
200lfm
400lfm
0
20
40
60
80
100
120
70 75 80 85 90 95 100
Load, %
Temperature, C
No Airflow
100lfm
200lfm
400lfm
0
20
40
60
80
100
120
70 75 80 85 90 95 100
Load, %
Temperature, C
No Airflow
100lfm
200lfm
400lfm
0
20
40
60
80
100
120
70 75 80 85 90 95 100
Load, %
Temperature, C
No Airflow
100lfm
200lfm
400lfm
0
20
40
60
80
100
120
70 75 80 85 90 95 100
Load, %
Temperature, C
No Airflow
100lfm
200lfm
400lfm
0
20
40
60
80
100
120
70 75 80 85 90 95 100
Load, %
Temperature, C
No Airflow
100lfm
200lfm
400lfm
MTC1 Series
Isolated 1W SM 2:1 Input Single Output DC-DC Converters
KDC_MTC1.E01 Page 10 of 12
All enquiries: www.murata-ps.com/support
www.murata-ps.com
EMC FILTERING AND SPECTRA
FILTERING
The module includes a basic level of filtering. With the addition of an input capacitor of 680nF and input inductor 10µH that are typically required to meet EN 55022 Curve A
Quasi-Peak EMC limit, as shown in the following plots.
MTC1S1203MC MTC1S1205MC
MTC1S1212MC MTC1S2403MC
MTC1S2405MC MTC1S2412MC
0
10
20
30
40
50
60
70
80
1.00E+05 1.00E+06 1.00E+07 1.00E+08
dBuV
Frequency (Hz)
0
10
20
30
40
50
60
70
80
1.00E+05 1.00E+06 1.00E+07 1.00E+08
dBuV
Frequency (Hz)
0
10
20
30
40
50
60
70
80
1.00E+05 1.00E+06 1.00E+07 1.00E+08
dBuV
Frequency (Hz)
0
10
20
30
40
50
60
70
80
1.00E+05 1.00E+06 1.00E+07 1.00E+08
dBuV
Frequency (Hz)
0
10
20
30
40
50
60
70
80
1.00E+05 1.00E+06 1.00E+07 1.00E+08
dBuV
Frequency (Hz)
0
10
20
30
40
50
60
70
80
1.00E+05 1.00E+06 1.00E+07 1.00E+08
dBuV
Frequency (Hz)
MTC1 Series
Isolated 1W SM 2:1 Input Single Output DC-DC Converters
KDC_MTC1.E01 Page 11 of 12
All enquiries: www.murata-ps.com/support
www.murata-ps.com
PACKAGE SPECIFICATIONS
Mechanical Dimensions Pin Connections
Pin Function
1 +Vin
2 -Vout
3 Trim
4 +Vout
5 Ctrl
6 -Vin
Recommended Footprint Details
All dimensions in mm(inches), Controlling dimension is mm. Tolerances (unless otherwise stated) ±0.10(0.004).
Components shown for reference only Weight: 3.4g
1
14.99 [0.590]
14.22 [0.560]
SEATING PLANE
S
11.23±0.47 [0.442±0.019]
6
5
4
3
2
1.14±0.24 [0.045±0.009]
0.89±0.23 [0.03±0.01]
0.25±0.27 [0.010±0.011]
9.91±0.27 [0.39±0.011]
7.62±0.27 [0.300±0.011]
12.45±0.25 [0.490±0.010]
0.25±0.27 [0.010±0.011]
x6 PINS
1.52±0.08 [0.060±0.003]
x6 PINS
1.02±0.05 [0.040±0.002]
12.70±0.28 [0.500±0.011]
14.22±0.27 [0.56±0.011]
12.19±0.27 [0.48±0.011]
x6 PINS 0.10 S
MTC1SXXXXMC
XYYWW
x6 PLACES
1.91 [0.075]
x6 PLACES
1.37 [0.054]
1.52 [0.060]
RECOMMENDED
ISOLATION BARRIER
1.52 [0.060]
9.91 [0.390]
12.19 [0.480] 7.62 [0.300]
12.45 [0.490]
0.25 [0.010]
12.70 [0.500]
0.25 [0.010]
MTC1 Series
Isolated 1W SM 2:1 Input Single Output DC-DC Converters
KDC_MTC1.E01 Page 12 of 12
All enquiries: www.murata-ps.com/support
www.murata-ps.com/support
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. © 2018 Murata Power Solutions, Inc.
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 REEL PACKAGING DETAILS
TAPE OUTLINE DIMENSIONS
0.6 [0.024] MAX
4.5
3.5
[0.177
0.138 ]
28.0 [1.102]
14.8±0.15 [0.583±0.006]#
12.2 [0.480]
15.5±0.15 [0.610±0.006]#
4.0 [0.157]
Ø1.5 +0.1
-0.0
[Ø0.059 +0.004
-0.000 ]
2.0 [0.079]
1.75 [0.069] 14.2±0.1[0.559±0.004]
28.4 [1.118]
32.0±0.3[1.26±0.01]
0.2±0.05[0.008±0.002]
DIRECTION OF UNREELING
Ø2.0 [Ø0.079] MIN
COVER TAPE
3° MAX
3° MAX
XXXX
38.4 [1.512] MAX #
1.50 [0.059]
MIN
Ø20.20 [Ø0.795]
MIN
Ø330 [13.000] MAX
OR
Ø177.8 [7.000] MAX
Ø
[
5.319
]
13.5
12.8 Ø5.043
100 [3.937]
MIN
LEADER SECTION
400 [15.748] MIN
GOODS
ENCLOSURE
SECTION
TRAILER SECTION
160 [6.299] MIN
Tape & Reel specifications shall conform with current EIA-481 standard
Unless otherwise stated all dimensions in mm(inches)
Controlling dimension is mm
# Measured at hub
Tape & Reel specifications shall conform with current EIA-481 standard
Unless otherwise stated all dimensions in mm(inches) ±0.1mm (±0.004 Inches)
Controlling dimension is mm
Components shall be orientated within the carrier tape as indicated
# Measured on a plane 0.3mm above the bottom pocket
Carrier tape pockets shown are
illustrative only - Refer to carrier tape
diagram for actual pocket details.
Reel Quantity: 7” - 30 or 13” - 150