LME SERIES Isolated 250mW Single Output DC-DC Converters SELECTION GUIDE Nominal Input Voltage Output Voltage Output Current (V) 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3 5 5 5 5 5 5 5 5 5 5 12 12 12 12 12 12 12 12 (V) 5 5 9 9 12 12 15 15 3.3 3.3 5 5 9 9 12 12 15 15 5 5 9 9 12 12 15 15 (mA) 50 50 28 28 21 21 16 16 76 76 50 50 28 28 21 21 16 16 50 50 28 28 21 21 16 16 Order Code LME0305D LME0305S LME0309D LME0309S LME0312D LME0312S LME0315D LME0315S FEATURES LME0503D ■ High Efficiency for Low Power Applications LME0505D LME0503S LME0505S ■ Pin Compatible with NME & NML LME0509D ■ 1kVDC Isolation LME0509S ■ SIP & DIP Package Styles LME0512D ■ Single Output Rail LME0512S LME0515D ■ Power Density 0.36W/cm 3 LME0515S ■ 3.3V, 5V and 12V Input LME1205D ■ 3.3V, 5V, 9V, 12V and 15V Output LME1205S LME1209D ■ Footprint from 0.69cm 2 LME1209S ■ UL 94V-0 Package Material LME1212D ■ No Heatsink Required ■ Internal SMD Construction ■ Toroidal Magnetics ■ Fully Encapsulated ■ No External Components Required ■ MTTF up to 3.2 Million Hours ■ PCB Mounting ■ Custom Solutions Available DESCRIPTION The LME series of DC-DC converters are optimised for low-power operation. Due to the low quiescent current they are able to offer efficiencies up to 75%. The use of advanced magnetics ensures a minimal quiescent current of around 2.5mA which ensures that efficiency is maximised in low power applications. They are ideally suited to generating a negative supply where only a positive rail exists. LME1212S LME1215D LME1215S Isolation Efficiency Capacitance (%) 70 70 75 75 75 75 75 75 70 70 70 70 75 75 75 75 75 75 70 70 75 75 75 75 75 75 (pF) 25 25 30 30 38 38 38 38 25 25 29 29 37 37 41 41 40 40 38 38 40 40 43 43 45 45 MTTF 1 Package Style kHrs 2767 2767 1250 1250 655 655 367 367 2637 2637 2279 2279 1139 1139 624 624 357 357 536 536 434 434 330 330 237 237 DIP SIP DIP SIP DIP SIP DIP SIP DIP SIP DIP SIP DIP SIP DIP SIP DIP SIP DIP SIP DIP SIP DIP SIP DIP SIP 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. INPUT CHARACTERISTICS Parameter Conditions MIN TYP MAX Units Voltage Range Continuous operation, 3.3V input types Continuous operation, 5V input types Continuous operation, 12V input types 2.97 4.5 10.8 3.3 5 12 3.63 5.5 13.2 V MIN TYP MAX Units 0.25 W 1.2 %/% OUTPUT CHARACTERISTICS Parameter Conditions Rated Power2 Voltage Set Point Accuracy Line Regulation TA= 0°C to 70°C See tolerance envelope High V IN to low V IN 10% load to rated load, 3.3V & 5V output types Load Regulation 10% load to rated load, all other output types BW=DC to 20MHz, LME03 types Ripple & Noise BW=DC to 20MHz, all other output types 15 % 10 75 100 mV p-p ABSOLUTE MAXIMUM RATINGS Short-circuit duration 3 Lead temperature 1.5mm from case for 10 seconds Input voltage V IN , LME03 types Input voltage V IN , LME05 types Input voltage V IN , LME12 types www.dc-dc.com 1 second 300°C 5V 7V 15V 1 Calculated using MIL-HDBK-217F with nominal input voltage at full load. 2 See derating curve 3 Supply voltage must be discontinued 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. LME SERIES Isolated 250mW Single Output DC-DC Converters ISOLATION CHARACTERISTICS PIN CONNECTIONS Parameter Conditions MIN Isolation Test Voltage Resistance Flash tested for 1 second Viso=500VDC TYP MAX 8 Pin DIP PIN 1 GND 4 VIN 5 +V 7 0V Units 1000 1 VDC GΩ GENERAL CHARACTERISTICS Parameter Conditions Switching Frequency All input types MIN TYP MAX Units 100 4 Pin SIP PIN 1 GND 2 VIN 3 0V 4 +V kHz TEMPERATURE CHARACTERISTICS Parameter Conditions MIN Specification Storage Cooling All output types 0 –55 TYP MAX Units 70 150 °C °C Free air convection PERFORMANCE CHARACTERISTICS tolerance envelope 0.500 +10% +5% +2.5% V nominal temperature derating graph 0.375 -2.5% 0.250 -7.5% 0.125 10 50 Output Load Current (%) Safe Operating Area 0 100 –40 0 50 70 100 125 150 Ambient Temperature (°C) MECHANICAL DIMENSIONS 8 Pin DIP 11.50 7.62 LME0505D 9.80 1 6.80 YYWW 4 7.62 7 0.25±0.05 5 4.1 0.50±0.05 5.08 11.50 4 Pin SIP 1.9 Printed Face LME0505S 6.00 10.0 0.25±0.05 1.25 YYWW 7.62 4.1 1 2 3 4 0.50±0.05 0.50±0.05 C&D Technologies (NCL) Limited reserve the right to alter or improve the specification, internal design or manufacturing process at any time, without notice. Please check with your supplier or visit our web site to ensure that you have the current and complete specification for your product before use. © C&D Technologies (NCL) Limited 2001 NDC LME.2 No part of this publication may be copied, transmitted or stored in a retrieval system or reproduced in any way including, but not limited to, photography, photocopy, magnetic or other recording means, without prior written permission from C&D Technologies (NCL) Limited. Instructions for use are available from www.dc-dc.com C&D Technologies (NCL) Ltd Tanners Drive, Blakelands North Milton Keynes MK14 5BU, England Tel: +44 (0)1908 615232 Fax:+44 (0)1908 617545 email: [email protected] www: http://www.dc-dc.com All dimensions in mm XX.XX ±0.25mm. All pins on a 2.54mm pitch and within ±0.25mm of true position. C&D Technologies (NCL), Inc. 5816 Creedmoor Road, Raleigh NC 27612, USA Tel: +1 (919) 571-9405 Fax: +1 (919) 571-9262 email: [email protected]