NKE SERIES
Isolated Sub-Miniature 1W Single Output DC-DC Converters
SELECTION GUIDE
Nominal
Input
Input
Current at
Output
Output
Current
Isolation
1
Voltage Voltage
Rated Load Efficiency Capacitance MTTF
†
OrderCode
NKE0303S
NKE0305S
NKE0503S
(V)
3.3
3.3
5
(V)
3.3
5
(mA)
303
200
303
200
200
111
83
(mA)
400
400
270
250
289
266
260
256
117
107
105
103
(%)
75
76
75
78
69
75
77
78
71
78
79
81
(pF)
30
35
40
34
28
29
30
32
35
50
57
60
kHrs
1234
632
619
419
2414
1173
633
360
620
488
360
252
3.3
5
5
NKE0505SE
NKE0505S
NKE0509S
NKE0512S
NKE0515S
NKE1205S
NKE1209S
NKE1212S
NKE1215S
5
5
5
5
9
12
15
5
9
12
15
FEATURES
■ New Sub-Miniature SIP & DIP Styles
■ 3kVDC Isolation
■ Efficiency to 81%
■ Wide Temperature performance at
5
66
12
12
12
12
200
111
83
66
† For DIP package style replace suffix S with D, eg NKE0303D.
full 1 Watt load, –40°C to 85°C
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.
■ Increased Power Density to
3
1.95W/cm
■ UL 94V-0 Package Material
2
INPUT CHARACTERISTICS
■ Footprint 0.69cm
Parameter
Conditions
MIN
TYP
MAX Units
3.63
5.5
■ Single Isolated Output
■ Industry Standard Pinout
■ 3.3V, 5V & 12V Input
Continuous operation, 3.3V input types 2.97 3.3
Continuous operation, 5V input types 4.5 5.0
Continuous operation, 12V input types 10.8 12.0 13.2
Voltage Range
V
■ 3.3V, 5V, 9V, 12V and 15V Output
■ No Heatsink Required
Reflected Ripple Current
40
60 mA p-p
■ Internal SMD Construction
OUTPUT CHARACTERISTICS
■ Fully Encapsulated with Toroidal
Parameter
Rated Power2
Conditions
TYP
MAX Units
Magnetics
TA = –40°C to 85°C
1
W
%/%
%
■ No External Components Required
■ MTTF up to 2.4 Million hours
■ Custom Solutions Available
Voltage Set Point
See tolerance envelope
Accuracy
Line regulation
High VIN to low VIN
10% load to rated load, 3.3V output types
10% load to rated load, 5V output types
1.0
10
12
7.5
6.5
6.0
40
77
43
35
32
1.2
15
15
■ No Electrolytic or Tantalum
Load Regulation3 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, 3.3V output types
10
Capacitors
9.5
8.5
80
100
90 mV p-p
DESCRIPTION
The NKE sub-miniature series of DC-DC
Converters is particularly suited to isolating
and/or converting DC power rails. A smaller
package size, improved efficiency, lower
output ripple and 3kVDC isolation capability
through state of the art packaging and
improved technology. The galvanic isolation
allows the device to be configured to provide
an isolated negative rail in systems where
only positive rails exist. The wide temperature
range guarantees startup from –40°C and full
1 watt output at 85°C.
BW=DC to 20MHz, 5V output types
Ripple and Noise BW=DC to 20MHz, 9V output types
BW=DC to 20MHz, 12V output types
65
55
BW=DC to 20MHz, 15V output types
ABSOLUTE MAXIMUM RATINGS
Short circuit duration4
1 second
Internal power dissipation
Lead temperature 1.5mm from case for 10 seconds
530mW
300°C
5.5V
7V
15V
Input voltage V NKE03 types
in
Input voltage V NKE05 types
in
Input voltage V NKE12 types
in
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 T =25°C, nominal input voltage and rated output current unless otherwise specified.
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