NKA SERIES
Isolated Sub-Miniature 1W Dual Output DC-DC Converters
SELECTION GUIDE
Nominal
Input
Voltage Voltage
Input
Current at
Output
Output
Current
Isolation
1
Rated Load Efficiency Capacitance MTTF
†
OrderCode
NKA0303S
(V)
3.3
3.3
3.3
3.3
5
5
5
5
5
(V)
3.3
5
12
15
3.3
5
5
9
12
15
5
(mA)
163
100
42
(mA)
407
383
390
384
259
285
249
263
255
253
112
106
104
102
(%)
74
79
78
79
77
70
80
76
78
79
74
79
81
82
(pF)
20
22
31
32
20
21
26
25
28
29
33
48
55
60
kHrs
195
NKA0305S
NKA0312S
NKA0315S
NKA0503S
NKA0505S
1121
375
206
205
1697
1557
682
343
188
559
375
243
154
33
163
100
100
55
42
33
100
55
42
NKA0505SE
NKA0509S
NKA0512S
NKA0515S
NKA1205S
NKA1209S
NKA1212S
NKA1215S
FEATURES
■ New Sub-Miniature SIP & DIP
Package Styles
5
12
12
12
12
■ 3kVDC Isolation
■ Efficiency up to 82%
■ Wide Temperature performance at
9
12
15
33
full 1 Watt load, –40°C to 85°C
† For DIP package style replace suffix S with D, eg NKA0312D.
■ Increased Power Density to
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.
3
1.35W/cm
■ UL 94V-0 Package Material
■ Reduced Footprint at 0.98cm
■ Dual Output from a Single Input Rail
■ Industry Standard Pinout
INPUT CHARACTERISTICS
2
Parameter
Conditions
MIN
TYP
MAX Units
Continuous operation, 3.3V input types 2.97 3.3
Continuous operation, 5V input types
3.63
Voltage Range
V
4.5
5
5.5
13.2
60
■ Power Sharing on Output
■ 3.3V, 5V & 12V Input
■ 3.3V, 5V, 9V, 12V and 15V Output
■ No Heatsink Required
Continuous operation, 12V input types 10.8
3.3V input types
All other types
12
30
20
Reflected Ripple Current
mA p-p
35
OUTPUT CHARACTERISTICS
Parameter
Conditions
MIN
TYP
MAX Units
■ Internal SMD Construction
2
Rated Power
TA = -40°C to 120°C
1
W
■ Fully Encapsulated with Toroidal
Voltage Set Point
Accuracy
See tolerance envelope
Magnetics
■ No External Components Required
■ MTTF up to 1.6 Million hours
Line regulation
High VIN to low VIN
1.0
8
10
10
6.5
6
1.2
14
15
12
8
%/%
10% load to rated load, 0312 & 0315
10% load to rated load, 3.3V output types
10% load to rated load, 5V output types
10% load to rated load, 9V output types
10% load to rated load, 12V output types
10% load to rated load, 15V output types
BW=DC to 20MHz, 0312 & 0315
BW=DC to 20MHz, 3.3V output types
BW=DC to 20MHz, 5V output types
BW=DC to 20MHz, 9V output types
BW=DC to 20MHz, 12V output types
BW=DC to 20MHz, 15V output types
■ No Electrolytic or Tantalum
3
Capacitors
Load Regulation
%
8.5
7
DESCRIPTION
6
25
40
50
40
40
40
60
80
75
65
60
60
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 1watt.
Ripple and Noise
mV p-p
ABSOLUTE MAXIMUM RATINGS
Short circuit duration4
1 second
550mW
300°C
5.5V
7V
15V
Internal power dissipation
Lead temperature 1.5mm from case for 10 seconds
Input voltage VIN, NKA03 types
Input voltage VIN, NKA05 types
Input voltage VIN, NKA12 types
1 Calculated using MIL-HDBK-217F with nominal input voltage at full load.
2 See derating curve.
3 12V input types have typically 3% less load regulation change.
4 Supply voltage must be discontinued at the end of the short circuit duration.
All specifications typical at TA=25°C, nominal input voltage and rated output current unless otherwise specified.
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