MURATA LME0305SC

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
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
MTTF1
Package
Style
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
5V & 12V input
5V, 9V, 12V & 15V output
No heatsink required
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
Min.
Typ.
Max.
Units
0.25
W
1.2
15
10
100
%/%
mV p-p
Max.
Units
Internal SMD construction
OUTPUT CHARACTERISTICS
Fully encapsulated with toroidal magnetics
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
No external components required
1.0
%
ISOLATION CHARACTERISTICS
PCB mounting
DESCRIPTION
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.
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
For full details go to
www.murata-ps.com/rohs
www.murata-ps.com
Short-circuit protection3
Lead temperature 1.5mm from case for 10 seconds
Input voltage VIN, LME05 types
Input voltage VIN, LME12 types
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