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Isolated 1W Dual Output DC/DC Converters
SELECTION GUIDE
Nominal
Output
Input
Voltage
Recommended
Alternatives
(click for
Output
Current
Isolation
Capacitance
Efficiency
%
MTTF1
kHrs
Package
Style
Voltage
V
Order Code
data sheet)
V
mA
pF
Not recommended for new designs:
NMA2405SC
NMA2409SC
NMA2412SC
NMA2415SC
24
24
24
24
±±
±9
±1ꢀꢀ
±±±
±42
±33
7ꢀ
77
39
8±
6±
9±
194
129
134
1ꢀ1
MEA1D2405SC
MEA1D2409SC
MEA1D2412SC
MEA1D2415SC
SIP
±12
±1±
8ꢀ
FEATURES
ꢀRoHS compliant
8ꢀ
Obsolete:
7ꢀ
NMA2405DC
NMA2409DC
NMA2412DC
NMA2415DC
NMA4805DC
NMA4809DC
NMA4812DC
NMA4815DC
NMA4805SC
NMA4809SC
NMA4812SC
NMA4815SC
24
24
24
24
48
48
48
48
48
48
48
48
±±
±9
±1ꢀꢀ
±±±
±42
±33
±1ꢀꢀ
±±±
±42
±33
±1ꢀꢀ
±±±
±42
±33
39
8±
6±
9±
26
38
±2
±6
26
38
±2
±6
194
129
134
1ꢀ1
2ꢀ6
174
139
1ꢀ4
2ꢀ6
174
139
1ꢀ4
MEA1D2405DC
MEA1D2409DC
MEA1D2412DC
MEA1D2415DC
MEA1D4805DC
MEA1D4809DC
MEA1D4812DC
MEA1D4815DC
MEA1D4805SC
MEA1D4809SC
MEA1D4812SC
MEA1D4815SC
ꢀEfficiency up to 8ꢀ%
ꢀPower density up to ꢀ.8±W/cm3
ꢀDual output from a single input rail
ꢀUL 94V-ꢀ package material
ꢀNo heatsink required
ꢀFootprint from 1.17cm2
ꢀIndustry standard pinout
ꢀPower sharing on output
ꢀ1kVDC isolation
77
±12
±1±
±±
8ꢀ
8ꢀ
DIP
SIP
7ꢀ
±9
8ꢀ
±12
±1±
±±
8ꢀ
8ꢀ
7ꢀ
±9
8ꢀ
±12
±1±
8ꢀ
8ꢀ
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.
ꢀ24V & 48V input
ꢀ±V, 9V, 12V and 1±V output
ꢀInternal SMD construction
INPUT CHARACTERISTICS
Parameter
Conditions
Min.
21.6
43.2
Typ.
24
Max.
26.4
±2.8
Units
V
Continuous operation, 24V input types
Continuous operation, 48V input types
Voltage range
ꢀFully encapsulated with toroidal
magnetics
48
OUTPUT CHARACTERISTICS
ꢀNo external components required
Parameter
Rated Power2
Conditions
TA=ꢀ°C to 7ꢀ°C
Min.
Typ.
Max.
1
Units
W
DESCRIPTION
Voltage Set Point Accuracy See tolerance envelope
The NMA series of DC/DC converters are the
standard buliding blocks for on-board distrib-
uted power systems. They are 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 1 watt.
Line regulation
Load Regulation
Ripple and Noise
High VIN to low VIN
1.2
1±
%/%
%
1ꢀ% load to rated load, ±V output types
1ꢀ% load to rated load, all other output types
BW=DC to 2ꢀMHz, all input types
1ꢀ
1±ꢀ
mV p-p
ABSOLUTE MAXIMUM RATINGS
Short-circuit protection3
1 second
3ꢀꢀ°C
4±ꢀmW
28V
Lead temperature 1.±mm from case for 1ꢀ seconds
Internal power dissipation
Input voltage VIN, NMA24 types
Input voltage VIN, NMA48 types
±4V
1. Calculated using MIL-HDBK-217F with nominal input voltage at full load.
2. See derating graph.
3. Supply voltage must be discontinued at the end of the short circuit duration.
All specifications typical at T =2±°C, nominal input voltage and rated output current unless otherwise specified.
A
For full details go to
www.murata-ps.com/rohs
www.murata-ps.com
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