LME1205 (Newport)
Isolated 250mW Single Output DC-DC Converters

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LME SERIES
Isolated 250mW Single Output
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/cm3
3.3V, 5V and 12V Input
3.3V, 5V, 9V, 12V and 15V Output
Footprint from 0.69cm2
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
p i n c o n n ect i o n s
8 Pin DIP (top view)
0V +V
75
1
GND
4
V IN
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.
4 Pin SIP
1234
GND VIN 0V +V
DC-DC Converters 2 - 7


LME1205 (Newport)
Isolated 250mW Single Output DC-DC Converters

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LME SERIES
Isolated 250mW Single Output
absolute maximum ratings over operating free air* temperature range
Input voltage VIN LME03 types . . . . . . . . . . . . . . . . . . . . . . . . . . . 5V
Input voltage VIN LME05 types . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V
Input voltage VIN LME12 types . . . . . . . . . . . . . . . . . . . . . . . . . . 15V
Output power total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250mW
Short circuit duration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1s
Isolation voltage (flash tested for 1 second) . . . . . . . . . . . . . . . . . 1000VDC
Operating free air temperature range . . . . . . . . . . . . . . . . . . . 0°C to 70°C1
Storage temperature range . . . . . . . . . . . . . . . . . . . . . . --55°C to 150°C
Lead temperature 1.5mm from case for 10 seconds . . . . . . . . . . . . . . . 300°C
electrical specifications
(measured at TA=25°C, at nominal input voltage)
Input voltage range LME03 types . . . . . . . . . . . . . . . . . . . . . . 3.3V 10%
Input voltage range LME05 types . . . . . . . . . . . . . . . . . . . . . . . 5V 10%
Input voltage range LME12 types . . . . . . . . . . . . . . . . . . . . . . 12V 10%
Load voltage regulation (10% to 100% full load)
3.3V and 5V output types . . . . . . . . . . . . . . . . . . . . . . . . 15% max.
9V, 12V and 15V output types . . . . . . . . . . . . . . . . . . . . . . 10% max.
Line voltage regulation (10% to 100% full load) . . . . . . . . . . . . . 1.2%/1% of VIN
Output voltage accuracy . . . . . . . . . . . . . . . . . See tolerance envelope graph
Input reflected ripple (20MHz Band limited)
LME03 types . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50mV p-p max.
LME05 and 12 types . . . . . . . . . . . . . . . . . . . . . . . . 40mV p-p max.
Output ripple (20MHz Band limited)
LME03 types . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75mV p-p max.
LME05 and 12 types . . . . . . . . . . . . . . . . . . . . . . . 100mV p-p max.
Insulation resistance at 500VDC . . . . . . . . . . . . . . . . . . . . 1000 M min.
Efficiency at full load, 3.3V and 5V output types . . . . . . . . . . 70% typical 60% min.
Efficiency at full load, 9V, 12V and 15V output types . . . . . . . . 75% typical 70% min.
* Free air -- requires a minimum of 10mm air space around the component.
1 See derating curve.
2- 8


LME1205 (Newport)
Isolated 250mW Single Output DC-DC Converters

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LME SERIES
Isolated 250mW Single Output
electrical specifications
(measured at TA=25°C, at nominal input voltage)
Temperature drift (VOUT) . . . . . . . . . . . . . . . . . . . . . . 0.03% per °C max.
Temperature rise above ambient at full load . . . . . . . . . . . . . . . . . 10°C max.
Weight SIP types (typical) . . . . . . . . . . . . . . . . . . . . . . . . . . 1.4 grams
Weight DIP types (typical) . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5 grams
Switching frequency at full load (typical) . . . . . . . . . . . . . . . . . . . . 100kHz
No load power consumption (typical), LME03 types . . . . . . . . . . . . . . . 50mW
No load power consumption (typical), LME05 and 12 types . . . . . . . . . . . 30mW
selection guide
3 . 3 V , 5 V a n d 1 2 V i n p u t t yp e s
Part Number
LMEXX05D
LMEXX09D
LMEXX12D
LMEXX15D
LMEXX05S
LMEXX09S
LMEXX12S
LMEXX15S
Output Voltage
(V)
5
9
12
15
5
9
12
15
Output Current
(mA)
50
28
21
16
50
28
21
16
Package
Style
1
2
DC-DC Converters 2 - 9


LME1205 (Newport)
Isolated 250mW Single Output DC-DC Converters

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LME SERIES
Isolated 250mW Single Output
selection guide
L ME 0 5 0 3
Part Number
LME0503D
LME0503S
Output Voltage
(V)
3.3
Output Current
(mA)
76
Package
Style
1
2
typical isolation capacitance (pF)
Part Number
LME03XX
LME05XX
LME12XX
03
--
25
--
Output Voltage (V)
05 09
25 30
29 37
38 40
12
38
41
43
15
38
40
45
typical characteristics
L ME 0 3 s e r i e s
Note : All data taken at TA=25°C.
2- 10


LME1205 (Newport)
Isolated 250mW Single Output DC-DC Converters

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typical characteristics
L ME 0 5 s e r i e s
LME SERIES
Isolated 250mW Single Output
L ME 1 2 s e r i e s
t o l er a n c e en v el o p e
t e mp e r a t u r e
Note : All data taken at TA=25°C.
See application notes on page 2- 132
DC-DC Converters 2 - 1 1


LME1205 (Newport)
Isolated 250mW Single Output DC-DC Converters

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LME SERIES
Isolated 250mW Single Output
mean time to failure (MTTF) in thousands of hours
Part Number
LME0305
LME0309
LME0312
LME0315
LME0503
LME0505
LME0509
LME0512
LME0515
LME1205
LME1209
LME1212
LME1215
--25°C
3293
1459
759
424
3145
2660
1320
720
411
619
501
380
273
25°C
2767
1250
655
367
2637
2279
1139
624
357
536
434
330
237
Note : MTTF figures derived from hybrid model of MIL-HDBK-217F.
70°C
2319
1077
571
321
2204
1940
988
545
313
468
380
289
208
2- 12


LME1205 (Newport)
Isolated 250mW Single Output DC-DC Converters

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LME SERIES
Isolated 250mW Single Output
outline dimensions
8 P i n D I P p a c k a g e s t yl e
a g e s t yl e
12
4 P i n SI P pack -
Printed Face
r e c o mme n d e d f o o t p r i n t d e t a i l s
All pins on a 2.54mm pitch.
DC-DC Converters 2 - 1 3




LME1205.pdf
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