cdtechno LME0515D, LME0512S, LME0512D, LME0509D, LME0505S Datasheet

SELECTION GUIDE

FEATURES

■ High Efficiency for Low Power

Applications

■ Pin Compatible with NME & NML

■ 1kVDC Isolation

■ SIP & DIP Package Styles

■ Single Output Rail

■ Power Density 0.36W/cm

3

■ 3.3V, 5V and 12V Input

■ 3.3V, 5V, 9V, 12V and 15V Output

■ Footprint from 0.69cm

2

■ UL 94V-0 Package Material

■ 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.

Nominal

Input Output Output Isolation Package

Voltage Voltage Current Efficiency Capacitance MTTF

1

Style

Order Code (V) (V) (mA) (%) (pF) kHrs

LME0305D 3.3 5 50 70 25 2767 DIP
LME0305S 3.3 5 50 70 25 2767 SIP
LME0309D 3.3 9 28 75 30 1250 DIP
LME0309S 3.3 9 28 75 30 1250 SIP
LME0312D 3.3 12 21 75 38 655 DIP
LME0312S 3.3 12 21 75 38 655 SIP
LME0315D 3.3 15 16 75 38 367 DIP
LME0315S 3.3 15 16 75 38 367 SIP
LME0503D 5 3.3 76 70 25 2637 DIP
LME0503S 5 3.3 76 70 25 2637 SIP
LME0505D 5 5 50 70 29 2279 DIP
LME0505S 5 5 50 70 29 2279 SIP
LME0509D 5 9 28 75 37 1139 DIP
LME0509S 5 9 28 75 37 1139 SIP
LME0512D 5 12 21 75 41 624 DIP
LME0512S 5 12 21 75 41 624 SIP
LME0515D 5 15 16 75 40 357 DIP
LME0515S 5 15 16 75 40 357 SIP
LME1205D 12 5 50 70 38 536 DIP
LME1205S 12 5 50 70 38 536 SIP
LME1209D 12 9 28 75 40 434 DIP
LME1209S 12 9 28 75 40 434 SIP
LME1212D 12 12 21 75 43 330 DIP
LME1212S 12 12 21 75 43 330 SIP
LME1215D 12 15 16 75 45 237 DIP
LME1215S 12 15 16 75 45 237 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.

Parameter Conditions MIN TYP MAX Units

Continuous operation, 3.3V input types 2.97 3.3 3.63

Voltage Range Continuous operation, 5V input types 4.5 5 5.5 V

Continuous operation, 12V input types 10.8 12 13.2

Short-circuit duration

3

1 second
Lead temperature 1.5mm from case for 10 seconds 300°C
Input voltage VIN, LME03 types 5V
Input voltage VIN, LME05 types 7V
Input voltage VIN, LME12 types 15V

INPUT CHARACTERISTICS

OUTPUT CHARACTERISTICS

ABSOLUTE MAXIMUM RATINGS

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

www.dc-dc.com

Parameter Conditions MIN TYP MAX Units

Rated Power2TA= 0°C to 70°C 0.25 W
Voltage Set

Point Accuracy

See tolerance envelope

Line Regulation High VINto low V

IN

1.2 %/%

10% load to rated load,

Load Regulation

3.3V & 5V output types

15

%

10% load to rated load,
all other output types

10

Ripple & Noise

BW=DC to 20MHz, LME03 types 75

mV p-p

BW=DC to 20MHz, all other output types 100

LME SERIES

Isolated 250mW Single Output DC-DC Converters

C&D Technologies (NCL) Ltd

Tanners Drive, Blakelands North
Milton Keynes MK14 5BU, England
Tel: [phone]
Fax:[phone]
email: [e-mail]

www: http://www.dc-dc.com

C&D Technologies (NCL), Inc.

5816 Creedmoor Road, Raleigh
NC 27612, USA
Tel: [phone]
Fax: [phone]
email: [e-mail]

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

ISOLATION CHARACTERISTICS

PERFORMANCE CHARACTERISTICS

GENERAL CHARACTERISTICS

TEMPERATURE CHARACTERISTICS

PIN CONNECTIONS

Parameter Conditions MIN TYP MAX Units

Isolation Test Voltage Flash tested for 1 second 1000 VDC
Resistance Viso=500VDC 1 GΩ

Parameter Conditions MIN TYP MAX Units

Switching Frequency All input types 100 kHz

11.50

9.80

MECHANICAL DIMENSIONS

Parameter Conditions MIN TYP MAX Units

Specification All output types 0 70 °C
Storage –55 150 °C
Cooling Free air convection

8 Pin DIP

PIN

1 GND
4 V

IN

5 +V
7 0V

4 Pin SIP

PIN

1 GND
2 V

IN

3 0V
4 +V

tolerance envelope

+10%

+5%

V nominal

+2.5%

-2.5%

-7.5%

10 50 100

Output Load Current (%)

6.80

7.62

7.62

0.25±0.05

0.25±0.05

4.1

5.080.50±0.05

11.50

6.00

10.0

1.9 Printed Face

1.25

7.62

4.1

0.50±0.05

0.50±0.05

All dimensions in mm XX.XX ±0.25mm. All pins on a

2.54mm pitch and within ±0.25mm of true position.

8 Pin DIP

4 Pin SIP

LME0505D

YYWW

LME0505S

YYWW

1

1

7 5

4

2 3 4

temperature derating graph

0.500

0.375

0.250

0.125

0

–40 0 50 70 100 125 150

Ambient Temperature (°C)

Safe Operating Area