NXF1 Series
www.murata-ps.com
Isolated 1W Regulated Single Output DC-DC Converters
SELECTION GUIDE
1
Order Code
kHrs
V V mA mVp-p mA % % pF
MIL TEL
3
NXF1S0303MC 3.3 3.3 303 10 30 510 56 59 3 1093 9499
NXF1S0305MC 3.3 5 200 15 40 510 55.5 59 3 1053 11148
NXF1S0505MC 5 5 200 15 40 310 62 65 3 937 14652
FEATURES
UL60950 recognition pending
INPUT CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Output regulation <1%
Continuous operation, 3.3V input types 3.135 3.3 3.465
Voltage range V
Single isolated output
Continuous operation, 5V input types 4.75 5 5.25
3.3V Input types 15
3kVDC isolation Hi-Pot Test
Reected ripple current mA p-p
5V Input types 5
3.3V & 5V input
OUTPUT CHARACTERISTICS
3.3V & 5V output
Parameter Conditions Min. Typ. Max. Units
SMD construction
3.3V Output 1
Voltage set point accuracy %
5V Output 2
Patent protected
Rated power TA= -40C to 85C 1W
Short circuit protection
3.3V Output 0.03 0.1
Line regulation High VIN to low VIN %/%
5V output 0.01 0.1
DESCRIPTION
Load regulation 3.3V output types 0.5 1
%
(10% load to rated load)
5V output types 0.4 1
The NXF1 series of DC-DC converters is used
where a tightly regulated supply is required. They
ABSOLUTE MAXIMUM RATINGS
are ideal for situations where the input voltage
Short-circuit protection Continuous and auto recovery
is not tightly controlled. The single rail regulated
Input voltage VIN, NXF1S03 types 4V
output makes the ideal choice to power sensors,
Input voltage VIN, NXF1S05 types 7V
such as pressure transducers, hall effect sensors
and mass airow sensors.
ISOLATION CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Production tested for 1 second 3000
Isolation test voltage VDC
Qualication tested for 1 minute 3300
Resistance Viso= 1kVDC 10 G
GENERAL CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
NXF1S0303MC 90
Switching frequency kHz
NXF1S0305MC 106
NXF1S0505MC 270
TEMPERATURE CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
3.3V Input types -40 90
Specication See derating graphs
5V input types -40 105
Storage -50 125 C
3.3V input types 36
Product temperature above ambient
5V input type 28
Cooling Free air convection
1. Components are supplied in tape and reel packaging, please refer to package specication section. Orderable part numbers are
NXF1SXXXXMC-R7 (160 pieces per reel), or NXF1SXXXXMC-R13 (740 pieces per reel).
For full details go to
2. Calculated using MIL-HDBK-217F with nominal input voltage at full load.
www.murata-ps.com/rohs
3. NXF1S0303MC is in preliminary stages.
All specications typical at TA=25C, nominal input voltage and rated output current unless otherwise specied.
www.murata-ps.com/support
KDC_NXF1.C01 Page 1 of 9
Nominal Input
Voltage
Output
Voltage
Output Current
Ripple & Noise
(Typ.)
Ripple & Noise
(Max.)
Input Current
(Typ.)
Efciency (Min.)
Efciency (Typ.)
Isolation
Capacitance
2
MTTFNXF1 Series
Isolated 1W Regulated Single Output DC-DC Converters
TECHNICAL NOTES
ISOLATION VOLTAGE
Hi Pot Test, Flash Tested, Withstand Voltage, Proof Voltage, Dielectric Withstand Voltage & Isolation Test Voltage are all terms that relate to the same thing, a test voltage,
applied for a specied time, across a component designed to provide electrical isolation, to verify the integrity of that isolation.
Murata Power Solutions NXF1 series of DC-DC converters are all 100% production tested at 3kVDC for 1 second and has been qualication tested at 3.3kVDC for 1 minute.
A question commonly asked is, What is the continuous voltage that can be applied across the part in normal operation?
The NXF1 series is pending recognition by Underwriters Laboratory to 125Vrms Reinforced Insulation and 250Vrms Basic insulation, please see safety approval section below.
REPEATED HIGH-VOLTAGE ISOLATION TESTING
It is well known that repeated high-voltage isolation testing of a barrier component can actually degrade isolation capability, to a lesser or greater degree depending on materials,
construction and environment. The NXF1 series has a PCB embedded isolated transformer, using FR4 as an insolation barrier between primary and secondary windings. While parts
can be expected to withstand several times the stated test voltage, the isolation capability does depend on the FR4 insulation properties. Any material, including FR4 is susceptible
to eventual chemical degradation when subject to very high applied voltages thus implying that the number of tests should be strictly limited. We therefore strongly advise against
repeated high voltage isolation testing, but if it is absolutely required, that the voltage should be reduced by 20% from specied test voltage.
This consideration equally applies to agency recognized parts rated for better than functional isolation where the insulation is always supplemented by a further insulation system
of physical spacing or barriers.
SAFETY APPROVAL
ANSI/AAMI ES60601-1
The NXF1 series is pending recognition by Underwriters Laboratory (UL) to ANSI/AAMI ES60601-1 and provides 2 MOOP (Means Of Operator Protection) and 1MOPP (Means of
patient protection) based upon a working voltage of 125Vrms and 1 MOOP (Means Of Operator Protection) based upon a working voltage of 250Vrms max, between Primary and
Secondary.
UL60950
The NXF1 series is pending recognition by Underwriters Laboratory (UL) to UL60950 for reinforced insulation to a working voltage of 125Vrms and for basic insulation to a working
voltage of 250Vrms.
RoHS COMPLIANCE INFORMATION
This series is compatible with Pb-Free soldering systems and is also backward compatible with Sn/Pb soldering systems.
The NXF1 series can be soldered in accordance with J-STD-020 and have a classication temperature of 260C and
moisture sensitivity level 2. The termination nish on this product is Gold with plating thickness 0.12 microns.
www.murata-ps.com/support
KDC_NXF1.C01 Page 2 of 9