NKE SERIES
Isolated Sub-Miniature 1W Single Output DC-DC Converters
www.dc-dc.com
SELECTION GUIDE
FEATURES
s
New Sub-Miniature SIP & DIP Styles
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3kVDC Isolation
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Efficiency to 81%
s
Wide Temperature performance at
full 1 Watt load, 40C to 85C
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Increased Power Density to
1.95W/cm
3
s
UL 94V-0 Package Material
s
Footprint 0.69cm
2
s
Single Isolated Output
s
Industry Standard Pinout
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3.3V, 5V & 12V Input
s
3.3V, 5V, 9V, 12V and 15V Output
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No Heatsink Required
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Internal SMD Construction
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Fully Encapsulated with Toroidal
Magnetics
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No External Components Required
s
MTTF up to 2.4 Million hours
s
Custom Solutions Available
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No Electrolytic or Tantalum
Capacitors
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 40C and full
1 watt output at 85C.
Nominal
Input
Input
Output
Output
Current at
Isolation
Voltage
Voltage
Current
Rated Load Efficiency
Capacitance MTTF
1
OrderCode
(V)
(V)
(mA)
(mA)
(%)
(pF)
kHrs
NKE0303S
3.3
3.3
303
400
75
30
1234
NKE0305S
3.3
5
200
400
76
35
632
NKE0503S
5
3.3
303
270
75
40
619
NKE0505SE
5
5
200
250
78
34
419
NKE0505S
5
5
200
289
69
28
2414
NKE0509S
5
9
111
266
75
29
1173
NKE0512S
5
12
83
260
77
30
633
NKE0515S
5
15
66
256
78
32
360
NKE1205S
12
5
200
117
71
35
620
NKE1209S
12
9
111
107
78
50
488
NKE1212S
12
12
83
105
79
57
360
NKE1215S
12
15
66
103
81
60
252
For DIP package style replace suffix S with D, eg NKE0303D.
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.
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=25C, nominal input voltage and rated output current unless otherwise specified.
Parameter
Conditions
MIN
TYP
MAX
Units
Continuous operation, 3.3V input types 2.97
3.3
3.63
Voltage Range
Continuous operation, 5V input types
4.5
5.0
5.5
Continuous operation, 12V input types 10.8 12.0
13.2
V
Reflected Ripple Current
40
60
mA p-p
Short circuit duration
4
1 second
Internal power dissipation
530mW
Lead temperature 1.5mm from case for 10 seconds
300C
Input voltage V
in
NKE03 types
5.5V
Input voltage V
in
NKE05 types
7V
Input voltage V
in
NKE12 types
15V
INPUT CHARACTERISTICS
ABSOLUTE MAXIMUM RATINGS
Parameter
Conditions
TYP
MAX
Units
Rated Power
2
T
A
= 40C to 85C
1
W
Voltage Set Point
Accuracy
See tolerance envelope
Line regulation
High V
IN
to low V
IN
1.0
1.2
%/%
10% load to rated load, 3.3V output types
10
15
10% load to rated load, 5V output types
12
15
Load Regulation
3
10% load to rated load, 9V output types
7.5
10
%
10% load to rated load, 12V output types
6.5
9.5
10% load to rated load, 15V output types
6.0
8.5
BW=DC to 20MHz, 3.3V output types
40
80
BW=DC to 20MHz, 5V output types
77
100
Ripple and Noise BW=DC to 20MHz, 9V output types
43
90
mV p-p
BW=DC to 20MHz, 12V output types
35
65
BW=DC to 20MHz, 15V output types
32
55
OUTPUT CHARACTERISTICS
NKE SERIES
Isolated Sub-Miniature 1W Single Output DC-DC Converters
C&D Technologies (NCL) Ltd
Tanners Drive, Blakelands North
Milton Keynes MK14 5BU, England
Tel: +44 (0)1908 615232
Fax:+44 (0)1908 617545
email: info@cdtechno-ncl.com
www: http://www.dc-dc.com
C&D Technologies (NCL), Inc.
5816 Creedmoor Road, Raleigh
NC 27612, USA
Tel: +1 (919) 571-9405
Fax: +1 (919) 571-9262
email: info@us.cdtechno-ncl.com
C&D Technologies (NCL) Limited reserve the right to alter or improve the
specification, internal design or manufacturing process at any time, without
notice. Please check with your supplier or visit our web site to ensure that
you have the current and complete specification for your product before use.
C&D Technologies (NCL) Limited 2001
NDC NKE.5
No part of this publication may be copied, transmitted or stored in a
retrieval system or reproduced in any way including, but not limited to,
photography, photocopy, magnetic or other recording means, without prior
written permission from C&D Technologies (NCL) Limited.
Instructions for use are available from www.dc-dc.com
ISOLATION CHARACTERISTICS
TEMPERATURE CHARACTERISTICS
GENERAL CHARACTERISTICS
TEMPERATURE CHARACTERISTICS
PERFORMANCE CHARACTERISTICS
Parameter
Conditions
MIN
TYP
MAX
Units
Isolation Test Voltage
Flash tested for 1 second
3000
VDC
Resistance
Viso=500VDC
10
G
Parameter
Conditions
MIN
TYP
MAX
Units
Switching Frequency
All input types
115
kHz
Parameter
Conditions
MIN
TYP
MAX
Units
Specification
All output types
-40
85
C
Storage
-50
130
C
Case Temperature
0505D/S, 1205D/S
41
C
above ambient
All other output types
32
Cooling
Free air convection
6.00
MECHANICAL DIMENSIONS
7.46
4.60
3.60
1
1
2
3
4
0.30
0.20
0.55
0.45
0.500.05
4 Pin SIP
PIN
1
GND
2
V
IN
3
0V
4
+V
8 Pin DIP
PIN
1
GND
4
V
IN
5
+V
7
0V
Weight:1.09g
All dimensions in mm XX.XX
0.25mm. All pins on a
2.54mm pitch and within
0.25mm of true position.
2.54
11.48
2.180.50
1.25
7.62
NKE0505S
XYYWW
0.30
0.20
1.94
1.09
7.62
5.40
4.60
3.60
0.500.05
9.80
11.50
8 Pin DIP Package Style
4 Pin SIP Package Style
NKE0505D
XYYWW
4
5
7
7.62
10
25
50
75
100
Output Load Current (%)
tolerance envelope (3.3V output types)
+
9%
+1%
V
NOM
-7%
+1%
7%
15%
10
25
50
75
100
Output Load Current (%)
tolerance envelope (all other types)
Temperature Derating Graph
NKE 0303D/S, 0305D/S,
0503D/S, 0505DE/SE Types
Ambient Temperature (C)
85C
2.0
1.5
1.0
0.5
0
+
10%
+5%
V
NOM
+2.5%
2.5%
7.5%
Safe Operating Area
-40
0
50
100
150
Temperature Derating Graph
All other types
Ambient Temperature (C)
85C
120C
2.0
1.5
1.0
0.5
0
Safe Operating Area
-40
0
50
100
150
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