NKE Series
Isolated Sub-Miniature 1W Single Output DC/DC Converters
SELECTION GUIDE
Order Code
FEATURES
n RoHS Compliant
n Sub-Miniature SIP & DIP Styles
n 3kVDC Isolation
n Efficiency up to 81%
n Wide Temperature performance at full
1 Watt load, –40°C to 85°C
n Increased Power Density to 2.09W/cm3
n UL 94V-0 Package Material
n Footprint at 0.69cm
2
n Industry Standard Pinout
n 3.3V, 5V & 12V Input
n 3.3V, 5V, 9V, 12V and 15V Output
n No Heatsink Required
n Internal SMD Construction
n Fully Encapsulated with Toroidal
Magnetics
n MTTF up to 2.4 Million hours
n Custom Solutions Available
n No Electrolytic or Tantalum Capacitors
DESCRIPTION
NKE0303DC
NKE0305DC
NKE0309DC
NKE0303SC
NKE0305SC
NKE0309SC
NKE0503DC
NKE0505DC
NKE0505DEC
NKE0509DC
NKE0512DC
NKE0515DC
NKE0503SC
NKE0505SC
NKE0505SEC
NKE0509SC
NKE0512SC
NKE0515SC
NKE1205DC
NKE1209DC
NKE1212DC
NKE1215DC
NKE1205SC
NKE1209SC
NKE1212SC
NKE1215SC
mA
303
200
111
303
200
111
303
200
200
111
83
66
303
200
200
111
83
66
200
111
83
66
200
111
83
66
400
400
403
400
400
403
270
289
250
266
260
256
270
289
250
266
260
256
117
107
105
103
117
107
105
103
Output
Voltage
Output
Current
Efficiency
%
Isolation
MTTF1 Package
Capacitance
Style
pF
kHrs
75
76
75
75
76
75
75
69
78
75
77
78
75
69
78
75
77
78
71
78
79
81
71
78
79
81
30
35
30
30
35
30
40
28
34
29
30
32
40
28
34
29
30
32
35
50
57
60
35
50
57
60
1234
632
1204
1234
632
1204
619
2414
419
1173
633
360
619
2414
419
1173
633
360
620
488
360
252
620
488
360
252
DIP
SIP
DIP
SIP
DIP
SIP
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.
NKE0505SEC/NKE0505DEC offers higher efficiency than NKE0505SC/NKE0505DC but over a narrower operating temperature range.
See temperature characteristics graph.
INPUT CHARACTERISTICS
Parameter
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.
V
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
Input
Current at
Rated Load
mA
3.3
5
9
3.3
5
9
3.3
5
5
9
12
15
3.3
5
5
9
12
15
5
9
12
15
5
9
12
15
Nominal
Input
Voltage
V
Voltage range
Reflected ripple current
Conditions
Min.
Typ.
Max.
Continuous operation, 3.3V input types
Continuous operation, 5V input types
Continuous operation, 12V input types
3.3V input types
2.97
4.5
10.8
3.3
5.0
12.0
40
3.63
5.5
13.2
60
Units
V
mA p-p
ABSOLUTE MAXIMUM RATINGS
Short-circuit protection2
Lead temperature 1.5mm from case for 10 seconds
Internal power dissipation
Input voltage VIN, NKE03 types
Input voltage VIN, NKE05 types
Input voltage VIN, NKE12 types
1 second
300°C
530mW
5.5V
7V
15V
1. Calculated using MIL-HDBK-217F with nominal input voltage at full load.
2. Supply voltage must be disconnected 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.
For full details go to
www.murata-ps.com/rohs
www.murata-ps.com
Technical enquiries - email: mk@murata-ps.com, tel: +44 (0)1908 615232
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