LME Series www.murata-ps.com Isolated 250mW Single Output DC-DC Converters MTTF1 High efficiency for low power applications Isolation Capacitance 1kVDC isolation ‘Hi Pot Test’ Efficiency Single output rail Output Current FEATURES Output Voltage Order Code Nominal Input Voltage SELECTION GUIDE V V mA % pF kHrs 5 5 5 5 5 5 12 12 12 12 5 12 5 9 12 15 9 5 12 15 50 21 50 28 21 16 28 50 21 16 70 75 70 75 75 75 75 70 75 75 29 41 29 37 41 40 40 38 43 45 2279 624 2279 1139 624 357 434 536 330 237 LME0505DC LME0512DC LME0505SC LME0509SC LME0512SC LME0515SC LME1209DC LME1205SC LME1212SC LME1215SC Package Style DIP DIP SIP SIP SIP SIP DIP SIP SIP SIP SIP & DIP package styles 5V & 12V input MTTF up to 2.7 million hours LME0509DC LME0515DC LME1205DC LME1209SC LME1212DC LME1215DC Custom solutions available INPUT CHARACTERISTICS Pin compatible with CME, CRE1, NKE, NME, NML, MEE1 & MEE3 series Parameter 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 PRODUCT OVERVIEW OUTPUT CHARACTERISTICS 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. Parameter Conditions Min. Typ. Max. Units Rated Power Voltage Set Point Accuracy Line regulation TA=0°C to 70°C, See derating graph 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 0.25 W 1.2 15 10 100 %/% mV p-p Max. Units 5V, 9V, 12V & 15V output Internal SMD construction No external components required Load Regulation 5 5 12 12 12 12 2 Ripple and Noise 9 15 5 9 12 15 28 16 50 28 21 16 75 75 70 75 75 75 37 40 38 37 43 45 1139 357 536 1139 330 237 DIP DIP DIP SIP DIP DIP Recommended Alternative LME0509SC LME0515SC LME1205SC LME1209DC LME1212SC LME1215SC 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 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 260°C 7V 15V 1. Calculated using MIL-HDBK-217F with nominal input voltage at full load. All specifications typical at TA=25°C, nominal input voltage and rated output current unless otherwise specified. www.murata-ps.com/support KDC_LMEC.G02 Page 1 of 4 LME Series Isolated 250mW Single Output DC-DC Converters TEMPERATURE CHARACTERISTICS Parameter Conditions Min. Specification Storage Cooling All output types 0 -50 Units 70 130 °C TOLERANCE ENVELOPE +10% 0.375 +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 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. 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 enamelled 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 recognised 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 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 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%. www.murata-ps.com/support KDC_LMEC.G02 Page 2 of 4 LME Series Isolated 250mW Single Output DC-DC Converters PACKAGE SPECIFICATIONS MECHANICAL DIMENSIONS PIN CONNECTIONS - 8 PIN DIP DIP Package SIP Package 11.6±0.15 [0.457±0.006] LME XXXXDC XYYWW Pin Function 1 4 5 7 -VIN +VIN +VOUT -VOUT 9.9±0.15 [0.390±0.006] PIN CONNECTIONS - 4 PIN SIP 11.53±0.2 [0 .454±0.008] 10.00±0.25 [0 .394±0.010] 0.40 [0.016] MIN 6.9±0.15 [0.272±0.006] LME XXXXSC XYYWW S 4.10±0.5 [0.161±0.020] 4.10±0.5 [0 .161±0.020] 1 2 3 Pin Function 1 2 3 4 -VIN +VIN -VOUT +VOUT 4 0.5±0.05 [0.020±0.002] 1.99±0.25 [0.078±0.010] 2.54 [0.100] 1 0.50±0.05 [0 .020±0.002] 4 (2.21 [0.087]) 1.14±0.25 [0.045±0.010] 0.25±0.05 [0 .010±0.002] 7.62 [0.300] 7 0.25±0.05 [0.010±0.002] 5 (1.13 [0.044]) +0.15 6.10 -0.20 [ 0.240 +0.006 -0.008 ] 5.08 [0.200] 7.62 [0.300] All dimensions in mm (inches) Controlling dimension is mm. SIP: All pins on a 2.54 (0.100) pitch and within ±0.1 (0.004) of true position from pin 1 at seating plane ‘S’ DIP: All pins on a 2.54 (0.100) pitch and within ±0.25 (0.010) of true position Weight: 1.30g (SIP) 1.48g (DIP) www.murata-ps.com/support KDC_LMEC.G02 Page 3 of 4 LME Series Isolated 250mW Single Output DC-DC Converters PACKAGE SPECIFICATIONS (continued) RECOMMENDED FOOTPRINT DETAILS 8 Pin DIP Package 4 Pin SIP Package 2.54 (0.100) 4 HOLES 0.1 (0.00394) 1.15 (0.0453) Ø 1.00 (0.0394) x4 HOLES Ø 1.15 Ø 0.045 1.00 0.039 [ ] 2.54 (0.1) 2.54 (0.100) 2.54 (0.1) All dimensions in mm (inches) Controlling dimension is mm. TUBE OUTLINE DIMENSIONS 8 Pin DIP Tube 4 Pin SIP Tube 9.3 [0.366] 12.0 [0.472] 12.43 [0.489] 14.5 [0.571] 18.0 [0.709] 5.07±0.80 [0.200±0.03] 5.05 [0.199] Unless otherwise stated all dimensions in inches (mm ±0.5mm). Tube length (8 Pin DIP) : 520mm [20.472] ±2.0 [0.079]. Tube length (4 Pin SIP) : 520mm [20.472] ±2.0 [0.079]. 5.0 [0.197] Tube Quantity : 35 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/ 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. www.murata-ps.com/support KDC_LMEC.G02 Page 4 of 4