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| LME SERIES Isolated 250mW Single Output DC-DC Converters SELECTION GUIDE Nominal Input Voltage Output Voltage Output Current Isolation Efficiency Capacitance MTTF 1 Package Style Order Code LME0305D LME0305S LME0309D LME0309S LME0312D LME0312S LME0315D LME0315S FEATURES s High Efficiency for Low Power Applications s Pin Compatible with NME & NML s 1kVDC Isolation s SIP & DIP Package Styles s Single Output Rail s Power Density 0.36W/cm 3 s 3.3V, 5V and 12V Input s 3.3V, 5V, 9V, 12V and 15V Output s Footprint from 0.69cm 2 s UL 94V-0 Package Material s No Heatsink Required s Internal SMD Construction s Toroidal Magnetics s Fully Encapsulated s No External Components Required s MTTF up to 3.2 Million Hours s PCB Mounting s 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. LME0503D LME0503S LME0505D LME0505S LME0509D LME0509S LME0512D LME0512S LME0515D LME0515S LME1205D LME1205S LME1209D LME1209S LME1212D LME1212S LME1215D LME1215S (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 (%) 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 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 OUTPUT CHARACTERISTICS Parameter Conditions MIN TYP MAX Units Rated Power2 Voltage Set Point Accuracy Line Regulation TA= 0C to 70C See tolerance envelope 0.25 W 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 1.2 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 1 second 300C 5V 7V 15V www.dc-dc.com 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=25C, nominal input voltage and rated output current unless otherwise specified. LME SERIES Isolated 250mW Single Output DC-DC Converters ISOLATION CHARACTERISTICS Parameter Conditions MIN TYP MAX Units PIN CONNECTIONS 1000 1 VDC G 8 Pin DIP PIN 1 GND 4 VIN 5 +V 7 0V 4 Pin SIP PIN 1 GND 2 VIN 3 0V 4 +V Isolation Test Voltage Resistance Flash tested for 1 second Viso=500VDC GENERAL CHARACTERISTICS Parameter Conditions MIN TYP MAX Units Switching Frequency All input types 100 kHz TEMPERATURE CHARACTERISTICS Parameter Conditions MIN TYP MAX Units Specification Storage Cooling All output types Free air convection 0 -55 70 150 C C PERFORMANCE CHARACTERISTICS tolerance envelope +10% +5% V nominal 0.500 +2.5% -2.5% -7.5% 0.250 0.125 0 0.375 temperature derating graph Safe Operating Area 10 50 Output Load Current (%) 100 -40 0 50 70 100 125 150 Ambient Temperature (C) MECHANICAL DIMENSIONS 8 Pin DIP 9.80 11.50 7.62 LME0505D YYWW 6.80 7.62 1 7 4 5 5.08 1.9 Printed Face 0.250.05 0.250.05 4.1 0.500.05 4 Pin SIP 6.00 11.50 LME0505S 10.0 YYWW 1 .25 7 .62 4.1 1234 0.500.05 0.500.05 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) 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) 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: info@cdtechno-ncl.com www: http://www.dc-dc.com C&D Technologies (NCL), Inc. 5816 Creedmoor Road, Raleigh NC 27612, USA Tel: +1 (919) 571-9405 Fax: +1 (919) 571-9262 email: info@us.cdtechno-ncl.com |
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