B0503XT-W2 Datasheet, PDF (2/2 Pages) MORNSUN Science& Technology Ltd. – SINGLE OUTPUT, SMD DC-DC CONVERTER

COMMON SPECIFICATION
Item
Test Conditions
Min Typ. Max Units
Storage humidity
95
%
Operating temperature
-40
85
Storage temperature
Temp. rise at full load
-55
125
°C
15
25
Lead temperature
1.5mm from case for 10 seconds
260
Cooling
Free air convection
Case material
Plastic(UL94-V0)
Short circuit protection*
1
s
MTBF
3500
K hours
Weight
1.35
g
*Supply voltage must be discontinued at the end of short circuit duration.
APPLICATION NOTE
Requirement on output load
To ensure this module can operate efficiently
and reliably, During operation, the minimum output
load is not less than 10% of the full load, and that
this product should never be operated under
no load! If the actual output power is very small,
please connect a resistor with proper resistance at
the output end in parallel to increase the load.
Recommended 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).
TYPICAL CHARACTERISTICS
Operating Temp.(^oC)
RECOMMENDED REFLOW SOLDERING PROFILE
250
260^oC
10 Sec Max
22 0^oC
200
150
90 Sec Max
100
( >22 0^oC )
50
0
Time ( sec.)
OUTLINE DIMENSIONS & FOOTPRINT DETAILS
(Side view)
2.54 0.25
(0.100) (0.100)
12.70 (0.500)
7.62
(0.300)
(Top view)
First Angle Projection
RECOMMENDED FOOTPRINT
Top view,grid:2.54*2.54mm(0.1*0.1inch)
B_T-W2
B_(X)T-W2
2.00
(0.079)
8765
1234
1.00
(0.039)
8
5
12 4
2.54 0.10
(0.100 0.004)
0.60 0.05
(0.024 0.002)
6 . 76
(0. 2 6 6)
1.85
( 0 . 07 3)
7.19
( 0 . 28 3)
A
0.3
(0.012)
1.35
(0.053)
0.50 (0.020)
。
5.00
FOOTPRINT DETAILS
Pin Function(T) Function(XT)
1
GND
GND
2
Vin
Vin
4
0V
0V
5
+Vo
3,6,7
NC
8
NC
+Vo
No Pin
NC
NC:No Connection
Note:
U ni t :m m (i n ch )
Pin section:0.60*0.25mm(0.024*0.010inch)
Pin section tolerances: 0.10mm( 0.004inch)
General tolerances: 0.15mm( 0.006inch)
Vin
Cin
GND
L
DC DC
(Figure 1)
+Vo
Cout
0V
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. It’s not recommended to connect any
external capacitor in the application field.
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 connected to the input
or output end in series (Figure2).
Vin
GND
Vin
GND
REG
DC DC
REG
DC DC
(Figure2)
+Vout
0V
+Vout
0V
Overload Protection
Under normal operating conditions, the output
circuit of these products has no protection against
over-current and short-circuits. The simplest
method is to connect a self-recovery fuse in series
at the input end or add a circuit breaker to the
circuit.
No parallel connection or plug and play.
MORNSUN reserves the copyright
Specifications subject to change without notice.
B_(X)T-W2
A/1-2008
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