www.cdpoweronline.com
NKA SERIES
Isolated Sub-Miniature 1W Dual Output DC-DC Converters
SELECTION GUIDE
FEATURES
■New Sub-Miniature SIP & DIP
Package Styles
■3kVDC Isolation
■Efficiency up to 82%
■Wide Temperature performance at
full 1 Watt load, –40°C to 85°C
■Increased Power Density to
1.35W/cm3
■UL 94V-0 Package Material
■Reduced Footprint at 0.98cm2
■Dual Output from a Single Input Rail
■Industry Standard Pinout
■Power Sharing on Output
■3.3V, 5V & 12V Input
■3.3V, 5V, 9V, 12V and 15V Output
■No Heatsink Required
■Internal SMD Construction
■Fully Encapsulated with Toroidal
Magnetics
■No External Components Required
■MTTF up to 1.6 Million hours
■No Electrolytic or Tantalum
Capacitors
DESCRIPTION
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.
Nominal Input
Input Output Output Current at Isolation
Voltage Voltage Current Rated Load Efficiency Capacitance MTTF1
Order Code†(V) (V) (mA) (mA) (%) (pF) kHrs
NKA0303S 3.3 3.3 ±163 407 74 20 195
NKA0305S 3.3 5 ±100 383 79 22 1121
NKA0309S 3.3 9 ±56 402 75 30 1035
NKA0312S 3.3 12 ±42 390 78 31 375
NKA0315S 3.3 15 ±33 384 79 32 206
NKA0503S 53.3±163 259 77 20 205
NKA0505S 55±100 285 70 21 1697
NKA0505SE 55±100 249 80 26 1557
NKA0509S 59±55263 76 25 682
NKA0512S 512±42255 78 28 343
NKA0515S 515±33253 79 29 188
NKA1205S 12 5 ±100 112 74 33 559
NKA1209S 12 9 ±55 106 79 48 375
NKA1212S 12 12 ±42 104 81 55 243
NKA1215S 12 15 ±33 102 82 60 154
†For DIP package style replace suffix S with D, eg NKA0312D.
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.
1Calculated using MIL-HDBK-217F with nominal input voltage at full load.
2See derating curve.
312V input types have typically 3% less load regulation change.
4Supply 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.
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 5.5 V
Continuous operation, 12V input types 10.8 12 13.2
Reflected Ripple Current 3.3V input types 30 60 mA p-p
All other types 20 35
Short circuit duration41 second
Internal power dissipation 550mW
Lead temperature 1.5mm from case for 10 seconds 300°C
Input voltage VIN, NKA03 types 5.5V
Input voltage VIN, NKA05 types 7V
Input voltage VIN, NKA12 types 15V
INPUT CHARACTERISTICS
ABSOLUTE MAXIMUM RATINGS
OUTPUT CHARACTERISTICS
Parameter Conditions MIN TYP MAX Units
Rated Power2TA= -40°C to 120°C 1 W
Voltage Set Point
Accuracy See tolerance envelope
Line regulation High VIN to low VIN 1.0 1.2 %/%
10% load to rated load, 0312 & 0315 8 14
10% load to rated load, 3.3V output types 10 15
10% load to rated load, 5V output types 10 12
Load Regulation310% load to rated load, 9V output types 6.5 8 %
10% load to rated load, 12V output types 6 8.5
10% load to rated load, 15V output types 6 7
BW=DC to 20MHz, 0312 & 0315 25 60
BW=DC to 20MHz, 3.3V output types 40 80
BW=DC to 20MHz, 5V output types 50 75
Ripple and Noise BW=DC to 20MHz, 9V output types 40 65 mV p-p
BW=DC to 20MHz, 12V output types 40 60
BW=DC to 20MHz, 15V output types 40 60
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.cdpoweronline.com
C&D Technologies Inc.
3400 E Britannia Drive, Tucson,
Arizona 85706, USA
Tel: +1 (800) 547-2537
Fax: +1 (520) 741-4598
email: sales@cdtechno.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 2004 NDC NKA.7
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.cdpoweronline.com
NKA SERIES
Isolated Sub-Miniature 1W Dual Output DC-DC Converters
ISOLATION CHARACTERISTICS
GENERAL CHARACTERISTICS
TEMPERATURE CHARACTERISTICS
Parameter Conditions MIN TYP MAX Units
Isolation Test Voltage Flash tested for 1 second 3000 VDC
Resistance Viso=1000VDC 10 GΩ
Parameter Conditions MIN TYP MAX Units
Switching Frequency 3.3V input types 95 kHz
All other types 120
Parameter Conditions MIN TYP MAX Units
Specification All output types -40 85 °C
Storage -50 130 °C
Case Temperature 5V output types 30 °C
above ambient All other output types 21
Cooling Free air convection
0.234
(5.95)
PIN CONNECTIONS - 14 PIN DIP
1
GND
7
NC
8
0V
9
+V
11
-V
14
VIN
MECHANICAL DIMENSIONS
0.297
(7.55)
0.181(4.60)
0.142(3.60)
1 2 4 5 6
0.012(0.30)
0.008(0.20)
0.022(0.55)
0.018(0.45)
0.024
(0.60)
0.020
(0.50)
Weight: 1.4g (SIP) 1.9g (DIP)
All dimensions in inches(mm) ±0.01(0.25). All pins on
a 0.1(2.54) pitch and within ±0.01(0.25) of true position.
0.10(2.54)
0.652(16.55)
0.066±0.02
(1.675±0.50)
0.050
(1.25) 0.50(12.70)
0.386
(9.80)
0.213
(5.40)
0.181(4.60)
0.142(3.60)
0.012±0.002
(0.50±0.05)
0.768(19.50)
TEMPERATURE CHARACTERISTICS
Temperature Derating Graph
NKA0303D/S, 0305D/S, 0309D/S,
0505DE/SE types only
6 Pin SIP Package Style
14 Pin DIP Package Style
Ambient Temperature (°C)
85°C
120°C
Output Power (W)
2.0
1.5
1.0
0.5
0
Safe Operating Area
-40 0 50 100 150
10 25 50 75 100
Output Load Current (%)
Tolerance Envelope
Typical Load Line
Output Voltage
+9%
+1%
VNOM
–7%
+1%
–7%
–15%
Temperature Derating Graph
All other types
Ambient Temperature (°C)
85°C
120°C
Output Power (W)
2.0
1.5
1.0
0.5
0
Safe Operating Area
-40 0 50 100 150
10 25 50 75 100
Output Load Current (%)
Tolerance Envelope
Typical Load Line
Output Voltage
+10%
+5%
VNOM
+2.5%
–2.5%
–7.5%
NKA0505D
XYYWW
NKA0505S
XYYWW
PIN CONNECTIONS - 6 PIN SIP
1
VIN
2
GND
4
-V
5
0V
6
+V
17
891114
0.300
(7.62)
0.600(15.24)
0.084(2.13)
0.10(2.54)
0.012
(0.30)
0.008
(0.20)
0.043
(1.09)
