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NKE SERIES
Isolated Sub-Miniature 1W Single Output DC/DC Converters
KDC_NKEC.9 Page 1 of 4
SELECTION GUIDE
Order Code
Nominal
Input
Voltage
Output
Voltage
Output
Current
Input
Current at
Rated Load
Efficiency
Isolation
Capacitance
MTTF
1
Package
Style
(V) (V) (mA) (mA) % pF kHrs
NKE0303DC 3.3 3.3 303 400 75 30 1234
DIP
NKE0305DC 3.3 5 200 400 76 35 632
NKE0309DC 3.3 9 111 403 75 30 1204
NKE0303SC 3.3 3.3 303 400 75 30 1234
SIP
NKE0305SC 3.3 5 200 400 76 35 632
NKE0309SC 3.3 9 111 403 75 30 1204
NKE0503DC 5 3.3 303 270 75 40 619
DIP
NKE0505DC 5 5 200 289 69 28 2414
NKE0505DEC 5 5 200 250 78 34 419
NKE0509DC 5 9 111 266 75 29 1173
NKE0512DC 5 12 83 260 77 30 633
NKE0515DC 5 15 66 256 78 32 360
NKE0503SC 5 3.3 303 270 75 40 619
SIP
NKE0505SC 5 5 200 289 69 28 2414
NKE0505SEC 5 5 200 250 78 34 419
NKE0509SC 5 9 111 266 75 29 1173
NKE0512SC 5 12 83 260 77 30 633
NKE0515SC 5 15 66 256 78 32 360
NKE1205DC 12 5 200 117 71 35 620
DIP
NKE1209DC 12 9 111 107 78 50 488
NKE1212DC 12 12 83 105 79 57 360
NKE1215DC 12 15 66 103 81 60 252
NKE1205SC 12 5 200 117 71 35 620
SIP
NKE1209SC 12 9 111 107 78 50 488
NKE1212SC 12 12 83 105 79 57 360
NKE1215SC 12 15 66 103 81 60 252
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 Conditions Min. Typ. Max. Units
Voltage range
Continuous operation, 3.3V input types 2.97 3.3 3.63
V
Continuous operation, 5V input types 4.5 5.0 5.5
Continuous operation, 12V input types 10.8 12.0 13.2
Reflected ripple current 3.3V input types 40 60 mA p-p
ABSOLUTE MAXIMUM RATINGS
Short-circuit protection
2
1 second
Lead temperature 1.5mm from case for 10 seconds 300°C
Internal power dissipation 530mW
Input voltage VIN, NKE03 types 5.5V
Input voltage VIN, NKE05 types 7V
Input voltage VIN, NKE12 types 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.
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.
FEATURES
nRoHS Compliant
nSub-Miniature SIP & DIP Styles
n3kVDC Isolation
nEfficiency up to 81%
nWide Temperature performance at full
1 Watt load, –40°C to 85°C
nIncreased Power Density to 2.09W/cm
3
nUL 94V-0 Package Material
nFootprint at 0.69cm
2
nIndustry Standard Pinout
n3.3V, 5V & 12V Input
n3.3V, 5V, 9V, 12V and 15V Output
nNo Heatsink Required
nInternal SMD Construction
nFully Encapsulated with Toroidal
Magnetics
nMTTF up to 2.4 Million hours
nCustom Solutions Available
nNo Electrolytic or Tantalum Capacitors
For full details go to
www.cd4power.com/rohs