NKA Series
Isolated Sub-Miniature 1W Dual Output DC/DC Converters
SELECTION GUIDE
Order Code
NKA0303DC
NKA0305DC
NKA0309DC
NKA0312DC
NKA0315DC
NKA0303SC
NKA0305SC
NKA0309SC
NKA0312SC
NKA0315SC
NKA0503DC
NKA0505DC
NKA0505DEC
NKA0509DC
NKA0512DC
NKA0515DC
NKA0503SC
NKA0505SC
NKA0505SEC
NKA0509SC
NKA0512SC
NKA0515SC
NKA1205DC
NKA1209DC
NKA1212DC
NKA1215DC
NKA1205SC
NKA1209SC
NKA1212SC
NKA1215SC
Nominal
Input
Voltage
V
3.3
3.3
3.3
3.3
3.3
3.3
3.3
3.3
3.3
3.3
5
5
5
5
5
5
5
5
5
5
5
5
12
12
12
12
12
12
12
12
Output
Voltage
V
±3.3
±5
±9
±12
±15
±3.3
±5
±9
±12
±15
±3.3
±5
±5
±9
±12
±15
±3.3
±5
±5
±9
±12
±15
±5
±9
±12
±15
±5
±9
±12
±15
Output
Current
mA
±152
±100
±56
±42
±33
±152
±100
±56
±42
±33
±152
±100
±100
±56
±42
±33
±152
±100
±100
±56
±42
±33
±100
±56
±42
±33
±100
±56
±42
±33
Input
Current at
Rated Load
mA
407
383
402
390
384
407
383
402
390
384
259
285
249
263
255
253
259
285
249
263
255
253
112
106
104
102
112
106
104
102
Efficiency
%
74
79
75
78
79
74
79
75
78
79
77
70
80
76
78
79
77
70
80
76
78
79
74
79
81
82
74
79
81
82
Isolation
MTTF
1
Package
Capacitance
Style
pF
kHrs
20
22
30
31
32
20
22
30
31
32
22
21
26
25
28
29
22
21
26
25
28
29
33
48
55
60
33
48
55
60
195
1121
1035
375
206
195
1121
1035
375
206
205
1697
1557
682
343
188
205
1697
1557
682
343
188
559
375
243
154
559
375
243
154
DIP
SIP
FEATURES
RoHS compliant
Efficiency up to 82%
Wide temperature performance at full
1 Watt load, –40°C to 85°C
UL 94V-0 package material
Reduced footprint at 0.98cm
2
Industry standard pinout
Power sharing on output
3.3V, 5V & 12V Input
3.3V, 5V, 9V, 12V and 15V output
Internal SMD construction
Fully encapsulated with toroidal magnetics
No external components required
MTTF up to 1.6 Million hours
No electrolytic or tantalum capacitors
DIP
SIP
DIP
SIP
DESCRIPTION
The NKA sub-miniature series of industrial
temperature range DC/DC converters are the
standard building blocks for on-board distributed
power systems. The series offers smaller package
size, improved efficiency, lower output ripple and
3kVDC isolation capability through the use of state
of the art packaging and technology. Ideally suited
for providing dual rail supplies on primarily digital
boards with the added benefit of galvanic isolation
to reduce switching noise.
All of the rated power may be drawn from a single
pin provided the total load does not exceed 1 watt.
When operated with additional external load capacitance the rise time of the input voltage will determine the maximum external
capacitance value for guaranteed start up. The slower the rise time of the input voltage the greater the maximum value of the
additional external capacitance for reliable start up.
NKA0505DEC/NKA0505SEC offer higher efficiency than NKA0505SC/NKA0505DC but over a narrower operating temperature range.
See temperature characteristics graph.
INPUT CHARACTERISTICS
Parameter
Voltage range
Conditions
Continuous operation, 3.3V input types
Continuous operation, 5V input types
Continuous operation, 12V input types
3.3V input types
All other types
Min.
2.97
4.5
10.8
Typ.
3.3
5
12
30
20
Max.
3.63
5.5
13.2
60
35
Units
V
Reflected ripple current
mA p-p
ABSOLUTE MAXIMUM RATINGS
Short-circuit protection
2
Lead temperature 1.5mm from case for 10 seconds
Internal power dissipation
Input voltage V
IN
, NKA03 types
Input voltage V
IN
, NKA05 types
Input voltage V
IN,
NKA12 types
1 second
300°C
550mW
5.5V
7V
15V
For full details go to
www.murata-ps.com/rohs
1. Calculated using MIL-HDBK-217F with nominal input voltage at full load.
2. Supply voltage must be discontinued at the end of the short circuit duration.
All specifications typical at T
A
=25°C, nominal input voltage and rated output current unless otherwise specified.
www.murata-ps.com
Technical enquiries
-
email:
mk@murata-ps.com,
tel:
+44 (0)1908 615232
KDC_NKAC.I02
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