NKE SERIES
Isolated Sub-Miniature 1W Single Output DC-DC Converters
SELECTION GUIDE
Nominal
Input
Voltage
Output
Voltage
Output
Current
Input
Current at
Rated Load Efficiency
Isolation
Capacitance MTTF
1
OrderCode
†
NKE0303S
NKE0305S
NKE0503S
NKE0505SE
NKE0505S
NKE0509S
(V)
3.3
3.3
5
5
5
5
5
5
12
12
12
12
(V)
3.3
5
3.3
5
5
9
12
15
5
9
12
15
(mA)
303
200
303
200
200
111
83
66
200
111
83
66
(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
FEATURES
s
New Sub-Miniature SIP & DIP Styles
s
3kVDC Isolation
s
Efficiency to 81%
s
Wide Temperature performance at
full 1 Watt load, –40°C to 85°C
s
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
s
3.3V, 5V & 12V Input
s
3.3V, 5V, 9V, 12V and 15V Output
s
No Heatsink Required
s
Internal SMD Construction
s
Fully Encapsulated with Toroidal
Magnetics
s
No External Components Required
s
MTTF up to 2.4 Million hours
s
Custom Solutions Available
s
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 –40°C and full
1 watt output at 85°C.
NKE0512S
NKE0515S
NKE1205S
NKE1209S
NKE1212S
NKE1215S
† 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.
INPUT CHARACTERISTICS
Parameter
Conditions
MIN
TYP
MAX
Units
Voltage Range
Reflected Ripple Current
Continuous operation, 3.3V input types 2.97
Continuous operation, 5V input types
4.5
Continuous operation, 12V input types 10.8
3.3
5.0
12.0
40
3.63
5.5
13.2
V
60 mA p-p
OUTPUT CHARACTERISTICS
Parameter
Conditions
2
TYP
MAX
Units
Rated Power
Voltage Set Point
Accuracy
Line regulation
T
A
= –40°C to 85°C
See tolerance envelope
1.0
10
12
7.5
6.5
6.0
40
77
43
35
32
1
W
High V
IN
to low V
IN
10% load to rated load, 3.3V output types
10% load to rated load, 5V output types
3
Load Regulation
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
BW=DC to 20MHz, 5V output types
Ripple and Noise BW=DC to 20MHz, 9V output types
BW=DC to 20MHz, 12V output types
BW=DC to 20MHz, 15V output types
1.2
15
15
10
9.5
8.5
80
100
90
65
55
%/%
%
mV p-p
ABSOLUTE MAXIMUM RATINGS
Short circuit duration
4
Internal power dissipation
Lead temperature 1.5mm from case for 10 seconds
Input voltage V
in
NKE03 types
Input voltage V
in
NKE05 types
Input voltage V
in
NKE12 types
1
2
3
4
Calculated using MIL-HDBK-217F with nominal input voltage at full load.
See derating curve.
12V input types have typically 3% less load regulation change.
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.
1 second
530mW
300°C
5.5V
7V
15V
www.dc-dc.com
NKE SERIES
Isolated Sub-Miniature 1W Single Output DC-DC Converters
ISOLATION CHARACTERISTICS
Parameter
Conditions
MIN
TYP
MAX
Units
TEMPERATURE CHARACTERISTICS
3000
10
VDC
GΩ
2.0
MIN
TYP
MAX
Units
Isolation Test Voltage
Resistance
Flash tested for 1 second
Viso=500VDC
Temperature Derating Graph
NKE 0303D/S, 0305D/S,
0503D/S, 0505DE/SE Types
GENERAL CHARACTERISTICS
Parameter
Conditions
Switching Frequency
All input types
115
kHz
1.5
1.0
85°C
TEMPERATURE CHARACTERISTICS
Parameter
Conditions
MIN
TYP
MAX
Units
Specification
Storage
Case Temperature
above ambient
Cooling
All output types
0505D/S, 1205D/S
A ll other output types
Free air convection
-40
-50
85
130
41
32
°C
°C
°C
0.5
0
-40
Safe Operating Area
0
50
100
150
Ambient Temperature (°C)
Temperature Derating Graph
All other types
PERFORMANCE CHARACTERISTICS
tolerance envelope (3.3V output types)
+
9%
+1%
V
NOM
-7%
+1%
–7%
–15%
tolerance envelope (all other types)
+
10%
+5%
V
NOM
+2.5%
–2.5%
–7
.5%
2.0
1.5
1.0
0.5
0
85°C
Safe Operating Area
120°C
10
25
Output Load Current (%)
50
75
100
10
25
Output Load Cur rent (%)
50
75
100
-40
0
50
100
150
Ambient Temperature (°C)
MECHANICAL DIMENSIONS
4 Pin SIP Package Style
11.48
1.25
2.18±0.50
NKE0505S
6.00
7.46
XYYWW
7.62
0.30
0.20
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
4.60
3.60
0.55
0.45
1
2
3
4
0.50±0.05
7.62
8 Pin DIP Package Style
11.50
2.54
1.09
1.94
NKE0505D
XYYWW
9.80
1
5.40
4
0.30
0.20
4.60
3.60
7.62
7
0.50±0.05
5
All dimensions in mm XX.XX
±0.25mm. All pins on a
2.54mm pitch and within
±0.25mm of true position.
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
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
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