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Isolated 250mW Single Output DC/DC Converters0 pages
LME SERIES
Isolated 250mW Single Output DC/DC Converters
SELECTION GUIDE
FEATURES
RoHS compliant
Single output rail
1kVDC isolation
High efciency for low power applications
SIP & DIP package styles
Power density 0.36W/cm3
UL 94V-0 package material
Footprint from 0.69cm2
5V & 12V input
Nominal Input
Voltage
Output
Voltage
Output
Current
V
Order Code
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
Efciency
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.
5V, 9V, 12V & 15V output
INPUT CHARACTERISTICS
No heatsink required
Parameter
Conditions
Min.
Typ.
Max.
Units
Internal SMD construction
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
Fully encapsulated with toroidal magnetics
No external components required
MTTF up to 2.2 million hours
Custom solutions available
Pin compatible with NKE, NME & NML
series
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.
OUTPUT CHARACTERISTICS
Parameter
Conditions
Rated Power2
Voltage Set Point Accuracy
Line regulation
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
Load Regulation2
Ripple and Noise
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
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 specications typical at TA=25°C, nominal input voltage and rated output current unless otherwise specied.
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