B-NXT-1W Series
1W, FIXED INPUT, ISOLATED SINGLE OUTPUT SMD DC-DC CONVERTER
SELECTION GUIDE
Efficiency
(%.Typ.)
Input
Output
Isolation
Capacitance
pF
MTTF1
KHrs
Voltage(VDC)
Nominal
Order code
Current (mA)
Voltage
(VDC)
Current
(mA)
Rated Load
B0303NXT-1W
B0305NXT-1W
B0309NXT-1W
B0312NXT-1W
B0315NXT-1W
B0503NXT-1W
B0505XT-1W
3.3
3.3
3.3
3.3
3.3
5
410
390
400
400
400
270
294
260
278
267
260
256
124
114
113
111
3.3
5
303
200
111
83
81
83
74
76
81
85
83
86
83
85
74
78
80
80
85
81
29
30
34
40
42
31
33
42
43
38
44
43
50
72
89
100
5348
3847
3134
3473
2473
5515
6857
3933
6677
5501
3957
2747
4683
4008
3121
2316
FEATURES
◆Footprint over pins 1.37cm2
9
◆Short Circuit Protection(automatic recovery)
◆I/O isolation voltage 1000VDC
◆Operating Temperature: -40℃~﹢85℃
◆High efficiency up to 78%
12
15
3.3
5
66
303
200
200
167
111
83
5
B0505NXT-1W
B0506NXT-1W
B0509NXT-1W
B0512NXT-1W
B0515NXT-1W
B1205NXT-1W
B1209NXT-1W
B1212NXT-1W
B1215NXT-1W
5
5
◆Toroidal magnetics
5
6
5
9
◆Small SMD package with footprint
◆Power density 1.8W/cm3
5
12
15
5
5
66
◆Lead frame technology
12
12
12
12
200
111
83
◆Multi-layer ceramic capacitors
◆Custom solutions available
9
12
15
66
1. Calculated using MIL-HDBK-217FN2 with nominal input voltage at full load.
All specifications typical at TA=25℃, nominal input voltage and rated output current unless otherwise specified.
MODEL SELECTION
①
②
③
④
⑤
⑥
⑦
B 05 05 N X T -1W
Input Characteristics
①Product Series
③Output Voltage
⑤Fixed Input
②Input Voltage
④No Pin
⑥SMD Package
Parameter
Voltage range
Start up time
Conditions
Min.
Typ.
Max.
Units
Continuous operation, 3.3V input
Continuous operation, 5V input
Continuous operation, 12V input
2.97
4.5
3.3
5
3.63
5.5
VDC
VDC
⑦Rated Power
10.8
12
30
13.2
47
VDC
APPLICATIONS
mA p-p
The B-NXT-1W series are miniature,1W
DC/DC converters with high isolation in a
SMD package. With a new package design
these converters are qualified for the higher
temperatures requested by lead-free reflow
solder processes. With the small footprint,
these converters are the ideal solution for
board level power distribution,mainly for
applications in the industrial and telecom field.
For automated SMD production lines the
devices can be supplied in standard tape and
reel package.
Isolation Characteristics
Parameter
Conditions
Min.
Typ.
Max.
Units
Isolation voltage
Resistance
Flash tested for 1 second
Viso= 1000VDC
1000
10
VDC
GΩ
General Characteristics
Parameter
Conditions
Min.
Typ.
Max.
Units
Switching frequency
All output types
110
kHz
Absolute Maximum Ratings
Parameter
Conditions
MICRODC RESERVES THE COPYRIGHT
Lead temperature 1.5mm from case for 10 seconds
Internal power dissipation
300℃
600mW
5.5V
Input voltage V , B03 types
Input voltage Vin, B05 types
7V
Input voltage Vin, B12 types
15V
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