A-XMS
＆
B-XLMS
Series
1W, FIXED INPUT, ISOLATED&UNREGULATED DUAL/SINGLE OUTPUT,SUPERMINIATURE SIP PACKAGE
SELECTION GUIDE
Input
Order code
Voltage(VDC)
Output
Range
Voltage
(VDC)
Current
Max
Min
Nominal
Efficiency
(%,Typ)
Switching
Frequency
(KHz,Typ)
A0505XMS
5
5
5
5
12
12
12
12
5
5
5
5
12
12
12
12
24
24
24
24
24
4.5-5.5
4.5-5.5
4.5-5.5
4.5-5.5
10.8-13
10.8-13
10.8-13
10.8-13
4.5-5.5
4.5-5.5
4.5-5.5
4.5-5.5
10.8-13
10.8-13
10.8-13
10.8-13
21.6-26
21.6-26
21.6-26
21.6-26
21.6-26
±5
±9
±12
±15
±5
±9
±12
±15
5
9
12
15
5
9
12
15
5
9
12
15
24
±100
±56
±42
±33
±100
±56
±42
±33
200
111
83
67
200
111
83
67
200
111
83
67
42
±10
±6
±5
±4
±10
±6
±5
±4
20
12
9
7
20
12
9
7
20
12
9
7
5
70
75
78
79
72
75
77
79
70
75
79
80
72
75
77
79
70
73
75
78
77
84
81
82
83
180
150
84
83
82
83
83
80
84
81
82
83
82
83
83
80
84
FEATURES
◆
◆
◆
◆
A0509XMS
A0512XMS
A0515XMS
A1205XMS
A1209XMS
A1212XMS
A1215XMS
B0505XLMS
B0509XLMS
B0512XLMS
B0515XLMS
B1205XLMS
B1209XLMS
B1212XLMS
B1215XLMS
RoHS compliant
Efficiency up to 80%
Miniature SIP Package Style
Wide temperature performance at full 1
Watt load,-40°C to 85 °C
◆
◆
◆
◆
◆
◆
◆
◆
UL 94V-0 package material
No heatsink required
Industry standard pinout
Power sharing on output
1KVDC isolation
Continuous Short Circuit Protection
Internal SMD construction
No external components required
B2405XLMS
B2409XLMS
B2412XLMS
B2415XLMS
B2424XLMS
MODEL SELECTION
B 05 05 X LMS
①Product
Series
③Output
Voltage
⑤Package
Style
①
②
③
④
⑤
②Input
Voltage
④Fixed
Input
ISOLATION SPECIFICATIONS
Parameter
Isolation test voltage
Test conditions
Flash tested for 1 minute and 1mA max
Test at Viso=500VDC
Min.
1000
1000
Typ.
Max.
Units
VDC
MΩ
APPLICATIONS
The A_XMS&B_XLMS Series are specially
designed for applications where a group of
polar power supplies are isolated from the input
power supply in a distributed power supply
system on a circuit board.
These products apply to:
1) Where the voltage of the input power supply
is fixed (voltage variation ≤ ±10%);
2) Where isolation is necessary between input
and output (isolation voltage ≤1000VDC);
3) Where the regulation of the output voltage
and the output ripple noise are not demanding.
Such as: purely digital circuits, ordinary low
frequency analog circuits, and IGBT power
device driving circuits.
Isolation resistance
OUTPUT SPECIFICATIONS
Parameter
Output power
Line regulation
For Vin change of 1%
10% to 100% full load(5V output)
10% to 100% full load(9V output)
Load regulation
10% to 100% full load(12V output)
10% to 100% full load(15V output)
10% to 100% full load(24V output)
Output voltage
Temperature drift
Output Ripple&Noise*
100% full load
20MHz Bandwidth(A-XMS)
20MHz Bandwidth(B-XLMS)
Switching frequency
100% load, nominal input(5V,12V)
100% load, nominal input(24V)
50
75
100
500
10
8.3
6.8
6.3
5
Test conditions
Min.
0.1
Typ.
Max
1
1.2
15
10
10
10
10
Unit
W
%
See tolerance envelope graph
0.03
75
100
%/°C
MV
p-p
Khz
MICRODC R ESERVES THE COPYRIGHT
* Test ripple and noise by "parallel cable" method. See detailed operation instructions at Testing of Power
Converter section, application notes.
http://www.microdc.cn
Technical Enquiries-Email:tech@microdc.cn Tel:0086-20-86000646
Page 1 of 2
A-XMS
＆
B-XLMS
Series
COMMON SPECIFICATIONS
Parameter
Storage humidity range
Operating temperature
Storage temperature
Lead temperature
Temp.rise at full load
Cooling
Case material
Short circuit protection*
MTBF
Weight
3500
2.1
1.5mm from case for 10 seconds
-40
-55
300
15
25
Free air convection
Plastic(UL94-V0)
Continuous
1
s
K hours
Overload Protection
Conditions
Min.
Typ.
Max.
95
85
125
Units
%
Under normal operating conditions, the output circuit of these products has no
protection against overload. The simplest method is to connect a self-recovery
fuse in series at the input end or add a circuit breaker to the circuit.
Recommended testing and application circuit
If you want to further decrease the input/output ripple, an “LC” filtering network
may be connected to the input and output ends of the DC/DC converter, see
(Figure 1).
℃
g
*Supply voltage must be discontinued at the end of short circuit duration.
TYPICAL CHARACTERISTICS
Temperature Derating Graph
It should also be noted that the inductance and the frequency of the “LC”
filtering network should be staggered with the DC/DC frequency to avoid
mutual interference. However, the capacitance of the output filter capacitor
must be proper. If the capacitance is too big, a startup problem might arise.
For every channel of output, provided the safe and reliable operation is
ensured, the greatest capacitance of its filter capacitor sees (Table 1).
Vin
(VDC)
5
12
24
--
EXTERNAL CAPACITOR TABLE (TABLE 1)
Cin
Single
Cout
Dual
Vout
Vout
(μF)
47
2.2
1.0
--
(VDC)
5
9
12
15
(μF)
10
4.7
2.2
1
(VDC)
±5
±9
±12
±15
Cout
(μF)
4.7
2.2
1.0
0.47
OUTLINE DIMENSIONS & PIN CONNECTIONS
SIZE Graph
RECOMMENDED FOOTPRINT
Top view,grid:2.54mm(0.1inch)
diameter:1.00mm(0.039inch)
It's not recommend to connect any external capacitor in the application field
with less than 0.5 watt output.
Output Voltage Regulation and Over-voltage Protection Circuit
The simplest device for output voltage regulation, over-voltage and
over-current protection is a linear voltage regulator with overheat protection
that is conn ec ted to the in put or outp ut en d in ser i es (F i gu r e 2) .
FOOTPRINT DETAILS
Pin
Note:
Unit:mm(inch)
Pin section:0.50*0.3mm(0.020*0.012inch)
Pin section tolerances:±0.10mm(±0.004inch)
General tolerances: ±0.25mm(±0.010inch)
1
2
4
5
6
Single
VIN
GND
0V
NC
+Vo
Dual
VIN
GND
-Vo
0V
+Vo
When the environment temperature is higher than 71°C, the
product output power should be less than 60% of the
rated power.
No parallel connection or plug and play.
N C - Not available for electrical connection.
Requirement on output load
To ensure this module can operate efficiently and reliably, a minimum load is specified for this kind of DC/DC
converter in addition to a maximum load(namely full load).During operation, make sure the specified range
of input voltage is not exceeded,the minimum output load is not less than 10% of the full load, and that this
product should
never be operated under no load!
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.
Microdc Professional Power Module,Inc.
Tel:0086-20-86000646 E-mail:tech@microdc.cn
Website:http://www.microdc.cn
REACH COMPLIANT INFORMATION
This series has proven that this product does not contain harmful chemicals, it also has harmful chemical substances
through the registration, inspection and approval.
http://www.microdc.cn
Technical Enquiries-Email:tech@microdc.cn Tel:0086-20-86000646
Page 2 of 2
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