for low-power operation. They are ideally suited to
generating a negative supply where only a posi-
tive rail exists.
ABSOLUTE MAXIMUM RATINGS
Lead temperature 1.5mm from case for 10 seconds
Input voltage V
IN
, LME05 types
Input voltage V
IN
, LME12 types
300°C
7V
15V
1. Calculated using MIL-HDBK-217F with nominal input voltage at full load.
2. See derating curve.
All specifications typical at T
A
=25°C, nominal input voltage and rated output current unless otherwise specified.
For full details go to
www.murata-ps.com/rohs
www.murata-ps.com/support
KDC_LMEC.E05
Page 1 of 4
LME Series
Isolated 250mW Single Output DC/DC Converters
TEMPERATURE CHARACTERISTICS
Parameter
Specification
Storage
Cooling
Conditions
All output types
Free air convection
Min.
0
-50
Typ.
Max.
70
130
Units
°C
TEMPERATURE DERATING GRAPH
0.375
TOLERANCE ENVELOPE
+10%
+5%
V
NOM
Typical
L
oad Line
+2.5%
-2.5%
-7.5%
Output Power (W)
0.125
0
Safe Operating
Area
125°C
0
50
100
Ambient Temperature (°C)
150
Output Voltage
0.250
70°C
10
75
50
25
Output Load Current (%)
100
The voltage tolerance envelope shows typical load regulation characteristics for this product series. The toler-
ance envelope is the maximum output voltage variation due to changes in output loading.
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
APPLICATION NOTES
Minimum Load
The minimum load to meet datasheet specification is 10% of the full rated load across the specified input voltage range. Lower than 10% minimum loading will result in an
increase in output voltage, which may rise to typically double the specified output voltage if the output load falls to less than 5%.
www.murata-ps.com/support
KDC_LMEC.E05
Page 2 of 4
LME Series
Isolated 250mW Single Output DC/DC Converters
PACKAGE SPECIFICATIONS
MECHANICAL DIMENSIONS
DIP Package
SIP Package
11.48
(0.45)
PIN CONNECTIONS - 8 PIN DIP
Pin
1
4
5
7
Function
-V
IN
+V
IN
+V
OUT
-V
OUT
9.80 (0.386)
LME0505DC
XYYWW
11.50 (0.453)
6.00
(0.236)
PIN CONNECTIONS - 4 PIN SIP
Pin
6.80 (0.267)
10.0
(0.393)
Function
-V
IN
+V
IN
-V
OUT
+V
OUT
LME0505SC
XYYWW
1
2
3
4
0.55 (0.022)
0.45 (0.018)
4.60 (0.181)
3.60 (0.142)
1
2
3
4
0.55 (0.022)
0.45 (0.018)
4.60 (0.181)
3.60 (0.142)
1.89 (0.074)
2.77 (0.109)
7.62 (0.3)
1.25
(0.049)
5.08 (0.2)
7.62 (0.3)
7.62
(0.3)
0.55 (0.022)
0.45 (0.018)
0.30 (0.0118)
0.20 (0.0078)
1
1.09 (0.043)
4
7
0.30 (0.0118)
0.20 (0.0078)
5
1.94 (0.0763)
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.
Weight: 1.30g (SIP) 1.48g (DIP)
www.murata-ps.com/support
KDC_LMEC.E05
Page 3 of 4
LME Series
Isolated 250mW Single Output DC/DC Converters
PACKAGE SPECIFICATIONS (continued)
RECOMMENDED FOOTPRINT DETAILS
8 Pin DIP Package
4 Pin SIP Package
4 HOLES
0.1 (0.00394)
1.15 (0.0453)
Ø
1.00 (0.0394)
2.54
(0.1)
4 HOLES
0.1(0.00394)
Ø 1.15 (0.0453)
1.00 (0.0394)
2.54 (0.1)
Unless otherwise stated all dimensions in inches (mm ±0.5mm).
2.54 (0.1)
2.54
(0.1)
TUBE OUTLINE DIMENSIONS
8 Pin DIP Tube
12.0 (0.472)
4 Pin SIP Tube
9.30 (0.366)
14.50 (0.571)
18.00 (0.709)
12.43 (0.489)
5.00 (0.2)
Tube Quantity : 35
5.07 (0.199)
5.10 (0.2)
0.65 (0.026)
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.
ISO 9001 and 14001 REGISTERED
This product is subject to the following
operating requirements
and the
Life and Safety Critical Application Sales Policy:
Refer to:
http://www.murata-ps.com/requirements/
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
[i=s]This post was last edited by alan000345 on 2019-4-22 16:26[/i] [align=left][color=rgb(51, 51, 51)][font=-apple-system-font, BlinkMacSystemFont, "][size=17px]"Internet of Things" (IoT) and "smart ...
Frank Xiao
As a representative chip of D-CAP mode, TPS53355 has excellent load dynamic response performance and very simple external circuit design requirements. It is widely used in products such as ...
Latches and Triggers1. When do we need latches? The state cannot be maintained? The state of current microcontrollers can be maintained, right?2. I see many products use Schmitt triggers as gate drive...
[i=s] This post was last edited by qwqwqw2088 on 2018-10-22 08:41 [/i] [size=4]A small amount of parasitic capacitance (100 femtofarads) from the switch node to the input lead can prevent you from mee...
In C++ or C, different development platforms have different main function forms.1.int main();1.1 int indicates that the return value is int. When ending the function, you need to use the return keywor...
There are several questions
1. I want to separate the digital part and the analog part, but I don’t know how to do it.
2. Is there anything wrong with my layout of the audio circuit board?
Guidance re...
Abstract: A UPS parallel operation scheme with a "T" type connection structure is proposed. In this scheme, the UPS in parallel operation omits the signal connection line, which belongs to the mast...[Details]
The resonant frequency of this circuit is 35MHz and 40MHz. The FM signal is added to the upper and lower loops respectively through two common base amplifiers, and the connection point of the two loo...[Details]
The simulation schematic is as follows The microcontroller source program is as follows: /*********************************************************************************** * File name: main.c * ...[Details]
Recently, Mr. Chen Ziying, Marketing Director of Infineon Technologies Industrial Power Control Division Greater China, and Mr. Cheng Wentao, Application Marketing Director of Infineon Technologies P...[Details]
The application of AI+ has already become popular. For example, the industrial visual inspection cloud platform jointly built by Midea and Intel has been widely used, making the inspection of various...[Details]
The Switch has been launched in China for more than a year. According to a recent report by Reuters, the sales of Nintendo Switch in China, which is represented by Tencent, have exceeded 1 million un...[Details]
On November 14, the Liyang Municipal Finance Bureau issued the "Liyang City "Manufacturing Economy" Special Fund Management Measures" (draft for comments), which mentioned:
We encourage the pr...[Details]
Here I would like to share some of my experiences with you, hoping that it will be helpful to the novice IC designers and help them avoid some detours!
There are many different fields in the I...[Details]
Swiss battery manufacturer Leclanché said it has made a breakthrough in lithium-ion battery safety without affecting the performance of the battery cells. By adding a special additive to the electrol...[Details]
A week has passed, and earth-shaking changes have taken place in the electronic world. We have gathered the information worth paying attention to this week and read the major events of the week in on...[Details]
DesignWare HBM3 Controller, PHY and Verification IP Reduce Integration Risk and Dramatically Improve Memory Performance in 2.5D Multi-die Systems Low-latency HBM3 controller with flexible configura...[Details]
1 Introduction
Virtual medical instruments make full use of the rich software and hardware resources of computers. Only a small number of special software and hardware modules are added to real...[Details]
1 Introduction
Valve-regulated sealed lead-acid (VRLA) batteries are favored by various industries due to their advantages such as small size, explosion-proof, stable voltage, no pollution...[Details]
1 Introduction
With the rapid development of logging technology, the real-time acquisition and processing of various logging data have become indispensable in modern logging systems. The tradit...[Details]
Recently, senior executives of Liquid Flow Energy Storage Technology Co., Ltd. were invited to the UAE to hold a project discussion with the UAE Minister of State for Foreign Trade, and were invite...[Details]
RF/Wirelessly
京公网安备 11010802033920号
EEWORLD
