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CME0512SC

P1-P3P4-P6P7-P9P10-P11
CME Series
Isolated 0.75W Single Output Isolated DC/DC Converters
KDC_CME.B01 Page 1 of 11
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SELECTION GUIDE
Order Code
Nominal Input
Voltage
Output
Voltage
Output Current
Input Current
at Rated Load
Load Regulation
Ripple & Noise
Efficiency
Isolation
Capacitance
MTTF
1
V V mA mA
% mV p-p %
pF
MIL. Tel.
Typ. Max. Typ. Max. Min. Typ.
kHrs
CME0505DC 5 5 150
218 10 12 15 25 67 70
30 3400
CME0505SC 5 5 150
218 10 12 15 25 67 70
30 3400
CME0512SC 5 12 63 195 5 7 20 30 72 77 33 2200
3KVDC isolation options
CME0303S3C 3.3 3.3 227 300 9 12 15 25 66 73 30 1230
CME0305S3C 3.3 5 150 300 9 12 15 25 68 73 35 630
CME0505S3C 5 5 150 218 9 12 15 25 65 70 28 2400
CME0512S3C 5 12 63 200 5 7 10 15 70 75 30 630
Short Circuit Protection Options
CME0505SPC 5 5 150 195 7.5 9 11 25 74 76.5 22 2887 47047
CME0505DPC 5 5 150 195 7.5 9 11 25 74 76.5 22 2887 47047
INPUT CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Voltage range
Continuous operation, 3.3V input types 2.97 3.3 3.63
V
Continuous operation, 5V input types 4.5 5.0 5.5
Input short circuit current Short circuit variants 95 mA
Input reflected ripple
current
3.3V input types 1.5 2
mA p-p
5V input types 2 2.5
Short circuit types 3 15
OUTPUT CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Rated Power
2
TA=-40°C to 85°C, see derating graphs 0.75 W
Voltage Set Point Accuracy See tolerance envelope
Line regulation
High V
IN to low VIN ; Short circuit types 1.15 1.2
%/%
High V
IN to low VIN ; All other output types 1.0 1.2
ISOLATION CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Isolation test voltage
C Versions Flash tested for 1 second 1000
VDC
3C Versions Flash tested for 1 second 3000
Resistance Viso= 1000VDC 10 GΩ
GENERAL CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Switching frequency
CME0505XC 120
kHzShort circuit types 91
All other types 135
ABSOLUTE MAXIMUM RATINGS
Lead temperature 1.5mm from case for 10 seconds 260°C
Input voltage V
IN, 3.3V input 5.5V
Input voltage V
IN, 5V input 7V
1. Calculated using MIL-HDBK-217 FN2 and Telcordia SR-332 calculation model with nominal input voltage at full load.
2. See derating curve.
All specifications typical at T
A=25°C, nominal input voltage and rated output current unless otherwise specified.
PRODUCT OVERVIEW
The CME series are a cost effective 0.75W DC/DC
converter series, in industry standard packages
with industry standard pinout, Popular input and
output voltages are available as a lower power
alternative to a 1W DC/DC converter. The galvanic
isolation allows the device to be configured to
provide an isolated negative rail in systems where
only positive rails exist. The wide temperature
range guarantees startup from –40°C and full 0.75
watt output at 85°C. For the short circuit protected
parts (PC) protection is continuous and
auto-resetting on removal of the short circuit.
FEATURES
Short circuit protection options
UL 60950 recognised
Single Isolated output
1kVDC or 3kVDC option ‘Hi Pot Test’
Wide temperature performance at full
0.75W load -40°C to 85°C
Industry Standard Pinout
3.3V and 5V Inputs
3.3V, 5V & 12V outputs
Pin Compatible with LME, MEE1, MEE3,
NKE, NME, & NML series
CME Series
Isolated 0.75W Single Output Isolated DC/DC Converters
KDC_CME.B01 Page 2 of 11
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TEMPERATURE CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Specification All output types -40 85
°C
Storage -50 130
Case temperature rise above
ambient
3.3V & 5V output types 41
12V output types 32
Short circuit types (DIP) 23
Short circuit types (SIP)
24
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 specified time, across a component designed to provide electrical isolation, to verify the integrity of that isolation.
Murata Power Solutions CME series of DC/DC converters are all 100% production tested at their stated isolation voltage. This is 1kVDC for 1 second for C versions and 3kVDC for 1
second for 3C versions.
A question commonly asked is, “What is the continuous voltage that can be applied across the part in normal operation?”
The CME has been recognised 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 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 CME 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.
SAFETY APPROVAL
The CME series has been recognised by Underwriters Laboratory (UL) to UL 60950 for functional insulation in a maximum ambient temperature of 85ºC and/or case temperature
limit of 100ºC for CMExxxxxC, 130ºC for CMExxxxS3C. Case temperature measured on the face opposite the pins.
The CME 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.
CME03xxS3C: 0.9A
CME05xxxxC: 0.5A
All fuses should be UL recognized and rated to 125V.
File number E151252 applies.
CME Series
Isolated 0.75W Single Output Isolated DC/DC Converters
KDC_CME.B01 Page 3 of 11
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RoHS COMPLIANCE INFORMATION
This series is compatible with RoHS soldering systems with a peak wave solder temperature of 260°C for 10 seconds. The pin termination finish
on the SIP package type is Tin Plate, Hot Dipped over Matte Tin with Nickel Preplate. The DIP types are Matte Tin over Nickel Preplate. Both
types in this series are backward compatible with Sn/Pb soldering systems.
For further information, please visit www.murata-ps.com/rohs
TEMPERATURE DERATING GRAPHS
150100
50
0
-40
0
0.75
Safe Operating Area
85°C
Ambient Temperature (°C)
Output Power (W)
150100
50
0
-40
0
0.75
Safe Operating Area
85°C
Ambient Temperature (°C)
Output Power (W)
120°C
0303, 0305 & Short Circuit types.
All other types.
P1-P3P4-P6P7-P9P10-P11

CME0512SC

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Isolated DC/DC Converters 0.75W 5Vin 12Vout 63mA Single Out SIP
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