LME Series www.murata-ps. com Isolated 250mW Single Output DC/DC Converters SELECTION GUIDE Order Code FEATURES RoHS compliant Single output rail 1kVDC isolation High efficiency for low power applications SIP & DIP package styles Power density 0.36W/cm3 UL 94V-0 package material Footprint from 0.69cm2 5V & 12V input 5V, 9V, 12V & 15V output No heatsink required Nominal Input Voltage Output Voltage Output Current V V 5 5 5 5 5 5 5 5 12 12 12 12 12 12 12 12 5 9 12 15 5 9 12 15 5 9 12 15 5 9 12 15 LME0505DC LME0509DC LME0512DC LME0515DC LME0505SC LME0509SC LME0512SC LME0515SC LME1205DC LME1209DC LME1212DC LME1215DC LME1205SC LME1209SC LME1212SC LME1215SC Efficiency Isolation Capacitance mA % pF kHrs 50 28 21 16 50 28 21 16 50 28 21 16 50 28 21 16 70 75 75 75 70 75 75 75 70 75 75 75 70 75 75 75 29 37 41 40 29 37 41 40 38 40 43 45 38 40 43 45 2279 1139 624 357 2279 1139 624 357 536 434 330 237 536 434 330 237 DIP SIP Conditions Min. Typ. Max. Units Voltage range Continuous operation, 5V input types Continuous operation, 12V input types 4.5 10.8 5.0 12 5.5 13.2 V Min. Typ. Max. Units 0.25 W 1.2 15 10 100 %/% mV p-p Max. Units Parameter Conditions MTTF up to 2.2 million hours Rated Power2 Voltage Set Point Accuracy Line regulation Custom solutions available Load Regulation2 Pin compatible with NKE, NME & NML series Ripple and Noise TA=0°C to 70°C See tolerance envelope High VIN to low VIN 10% load to rated load, 5V output types 10% load to rated load, all other types BW=DC to 20MHz, all output types The LME series of DC/DC converters are optimised for low-power operation. They are ideally suited to generating a negative supply where only a positive rail exists. SIP Parameter OUTPUT CHARACTERISTICS DESCRIPTION DIP INPUT CHARACTERISTICS Fully encapsulated with toroidal magnetics PCB mounting Package Style When operated with additional external load capacitance the rise time of the input voltage will determine the maximum external capacitance value for guaranteed start up. The slower the rise time of the input voltage the greater the maximum value of the additional external capacitance for reliable start up. Internal SMD construction No external components required MTTF1 1.0 % ISOLATION CHARACTERISTICS Parameter Conditions Min. Isolation test voltage Resistance Flash tested for 1 second Viso= 500VDC 1000 1 Typ. VDC GΩ GENERAL CHARACTERISTICS Parameter Conditions Switching frequency All input types Min. Typ. 100 Max. Units kHz ABSOLUTE MAXIMUM RATINGS Short-circuit protection3 Lead temperature 1.5mm from case for 10 seconds Input voltage VIN, LME05 types Input voltage VIN, LME12 types For full details go to www.murata-ps.com/rohs www.murata-ps.com 1 second 300°C 7V 15V 1. Calculated using MIL-HDBK-217F with nominal input voltage at full load. 2. See derating curve. 3. Supply voltage must be disconnected at the end of the short circuit duration. All specifications typical at TA=25°C, nominal input voltage and rated output current unless otherwise specified. Technical enquiries - email: [email protected], tel: +44 (0)1908 615232 KDC_LMEC_E03 Page 1 of 5 LME Series Isolated 250mW Single Output DC/DC Converters TEMPERATURE CHARACTERISTICS Parameter Conditions Min. Specification Storage Cooling All output types 0 -55 Units 70 130 °C TOLERANCE ENVELOPE 0.375 +10% +5% VNOM 70°C 0.250 Safe Operating Area 0.125 125°C 0 50 100 Ambient Temperature (°C) 150 Output Voltage Output Power (W) Max. Free air convection TEMPERATURE DERATING GRAPH 0 Typ. Typical L oad Line +2.5% -2.5% -7.5% 10 75 50 25 Output Load Current (%) 100 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 LME 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 LME 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 LME 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. RoHS COMPLIANT INFORMATION This series is compatible with RoHS soldering systems with a peak wave solder temperature of 300°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 www.murata-ps.com Technical enquiries - email: [email protected], tel: +44 (0)1908 615232 KDC_LMEC_E03 Page 2 of 5 LME Series Isolated 250mW Single Output DC/DC Converters PACKAGE SPECIFICATIONS MECHANICAL DIMENSIONS PIN CONNECTIONS - 8 PIN DIP SIP Package DIP Package 0.45 (11.48) 0.386 (9.80) LME0505DC 0.236 (6.00) XYYWW Pin Function 1 4 5 7 -VIN +VIN +VOUT -VOUT PIN CONNECTIONS - 4 PIN SIP 0.453 (11.50) 0.267 (6.80) 0.393 (10.0) LME0505SC XYYWW 0.181 (4.60) 0.142 (3.60) 1 0.022 (0.55) 0.018 (0.45) 1 2 3 0.181 (4.60) 0.142 (3.60) 4 Function 1 2 3 4 -VIN +VIN -VOUT +VOUT 4 0.022 (0.55) 0.018 (0.45) 0.074 (1.89) 0.109 (2.77) 0.043 (1.09) 0.022 (0.55) 0.018 (0.45) Pin 0.0118 (0.30) 0.0078 (0.20) 0.3 (7.62) 7 0.049 (1.25) 5 0.0118 (0.30) 0.0078 (0.20) 0.2 (5.08) 0.3 (7.62) 0.3 (7.62) 0.0763 (1.94) All dimensions in inches ±0.01 (mm ±0.25mm). All pins on a 0.1 (2.54) pitch and within ±0.01 (0.25) of true position. www.murata-ps.com Weight: 1.30g (SIP) 1.48g (DIP) Technical enquiries - email: [email protected], tel: +44 (0)1908 615232 KDC_LMEC_E03 Page 3 of 5 LME Series Isolated 250mW Single Output DC/DC Converters PACKAGE SPECIFICATIONS (continued) RECOMMENDED FOOTPRINT DETAILS 8 Pin DIP Package 4 Pin SIP Package )0-&4 )0-&4 Unless otherwise stated all dimensions in inches (mm ±0.5mm). TUBE OUTLINE DIMENSIONS 4 Pin SIP Tube 8 Pin DIP Tube Unless otherwise stated all dimensions in inches (mm ±0.5mm). Tube length (8 Pin DIP) : 20.47 (520mm ±2mm). Tube length (4 Pin SIP) : 20.47 (520mm ±2mm). Murata Power Solutions, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A. Tel: (508) 339-3000 (800) 233-2765 Fax: (508) 339-6356 Tube Quantity : 35 USA: Mansfield (MA), Tel: (508) 339 3000, email: [email protected] Canada: Toronto, Tel: (866) 740 1232, email: [email protected] UK: Milton Keynes, Tel: +44 (0)1908 615232, email: [email protected] France: Montigny Le Bretonneux, Tel: +33 (0)1 34 60 01 01, email: [email protected] Germany: München, Tel: +49 (0)89-544334-0, email: [email protected] Japan: Tokyo, Tel: 3-3779-1031, email: [email protected] Osaka, Tel: 6-6354-2025, email: [email protected] China: Shanghai, Tel: +86 215 027 3678, email: [email protected] Guangzhou, Tel: +86 208 221 8066, email: [email protected] www.murata-ps.com email: [email protected] ISO 9001 & ISO 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. © 2009 Murata Power Solutions, Inc. www.murata-ps.com Singapore: Parkway Centre, Tel: +65 6348 9096, email: [email protected] Technical enquiries - email: [email protected], tel: +44 (0)1908 615232 KDC_LMEC_E03 Page 4 of 5