features
Dual Output from a Single Input Rail
Pin Compatible with NMH
Industry Standard Pinout
Power Sharing on Output
1kVDC Isolation
SIP & DIP Package Styles
Efficiency to 80%
Power Density 0.85W/cm3
3.3V, 24V & 48V Input
5V, 9V, 12V and 15V Output
Footprint from 1.17cm2
UL 94V-0 Package Material
No Heatsink Required
Internal SMD Construction
Toroidal Magnetics
Fully Encapsulated
No External Components Required
MTTF up to 2.1 Million hours
PCB Mounting
Custom Solutions Available
description
The NMA series of DC-DC converters are
the standard building blocks for on-board
distributed power systems. They are ideally
suited to 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.
NMA SERIES
Isolated 1W Dual Output
14 Pin DIP (top view)
7 Pin SIP
VIN --V +V 0V
14 11 9 8
1 7
GND NC
1 2 4 5 6
VIN GND --V 0V +V
pin connections
2
-
NMA
SER
I
ES
DC-DC Converters 2-15
absolute maximum ratings over operating free air* temperature range
Input voltage VIN NMA03 types . . . . . . . . . . . . . . . . . . . . . . . . . . 5V
Input voltage VIN NMA24 types . . . . . . . . . . . . . . . . . . . . . . . . . 28V
Input voltage VIN NMA48 types . . . . . . . . . . . . . . . . . . . . . . . . . 54V
Output power total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1W
Short-circuit duration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1s
Isolation voltage (flash tested for 1 second) . . . . . . . . . . . . . . . . . 1000VDC
Operating free air temperature range . . . . . . . . . . . . . . . . . . . 0°C to 70°C1
Storage temperature range . . . . . . . . . . . . . . . . . . . . . . --55°C to 150°C
Lead temperature 1.5mm from case for 10 seconds . . . . . . . . . . . . . . . 300°C
electrical specifications
(measured at TA=25°C, at nominal input voltage)
Input voltage range NMA03 types . . . . . . . . . . . . . . . . . . . . . 3.3V 10%
Input voltage range NMA24 types . . . . . . . . . . . . . . . . . . . . . 24V 10%
Input voltage range NMA48 types . . . . . . . . . . . . . . . . . . . . . 48V 10%
Load voltage regulation (10% to 100% full load)
5V output types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15% max.
9V, 12V and 15V output types . . . . . . . . . . . . . . . . . . . . . . 10% max.
Line voltage regulation (10% to 100% full load) . . . . . . . . . . . . . 1.2%/1% of VIN
Output voltage accuracy . . . . . . . . . . . . . . . . . See tolerance envelope graph
Input reflected ripple (20 MHz Band limited)
NMA03 and 48 types . . . . . . . . . . . . . . . . . . . . . . . 100mV p-p max.
NMA24 type . . . . . . . . . . . . . . . . . . . . . . 80mV p-p max.
Output ripple (20 MHz Band limited)
NMA03 and 48 types . . . . . . . . . . . . . . . . . . . . . . . 150mV p-p max.
NMA05, 12 and 24 types . . . . . . . . . . . . . . . . . . . . . . 75mV p-p max.
Insulation resistance at 500VDC . . . . . . . . . . . . . . . . . . . . 1000M min.
Efficiency at full load, 5V output types . . . . . . . . . . . . . . . 70% typical 65% min.
Efficiency at full load, 9V, 12V and 15V output types . . . . . . . . 80% typical 70% min.
* Free air -- requires a minimum of 10mm air space around the component. 1 See derating curve.
NMA SERIES
Isolated 1W Dual output
2-16
electrical specifications
(measured at TA=25°C, at nominal input voltage)
Temperature drift (VOUT) . . . . . . . . . . . . . . . . . . . . . . 0.03% per °C max.
Temperature rise above ambient at full load . . . . . . . . . . . . . . . . . 10°C max.
Weight NMA03/05/12/24 DIP and SIP types (typical) . . . . . . . . . . . . 2.3 grams
Weight NMA48 DIP and SIP types (typical) . . . . . . . . . . . . . . . . . . 2.9 grams
Switching frequency at full load (typical) . . . . . . . . . . . . . . . . . . . . 100kHz
No load power consumption (typical) . . . . . . . . . . . . . . . . . . . . . 100mW
selection guide
3.3V and 24V input types
Part Number Output Voltage
(V) Output Current
Each Output (mA) Package
Style
NMAXX05D 5 100
1
NMAXX09D 9 56
NMAXX12D 12 42
NMAXX15D 15 34
NMAXX05S 5 100
3
NMAXX09S 9 56
NMAXX12S 12 42
NMAXX15S 15 34
NMA SERIES
Isolated 1W Dual Output
2 - NMA SERIES
DC-DC Converters 2-17
selection guide
48V input types
Part Number Output Voltage
(V) Output Current
Each Output (mA) Package
Style
NMA4805D 5100
2
NMA4809D 956
NMA4812D 12 42
NMA4815D 15 34
NMA4805S 5100
4
NMA4809S 956
NMA4812S 12 42
NMA4815S 15 34
typical isolation capacitance (pF)
Part Number Output Voltage (V)
05 09 12 15
NMA03XXX 23 25 21 23
NMA05XXX 18 25 26 32
NMA12XXX 33 40 57 60
NMA24XXX 39 50 65 95
NMA48XXX 26 38 52 56
NMA SERIES
Isolated 1W Dual Output
2-18
typical characteristics
Note : All data taken at TA=25°C.
NMA SERIES
Isolated 1W Dual Output
NMA12 series
NMA03 series
NMA05 series
2 - NMA SERIES
DC-DC Converters 2-19
typical characteristics
Note : All data taken at TA=25°C.
NMA SERIES
Isolated 1W Dual Output
NMA24 series
NMA48 series
Safe Operating Area
See application notes on page 2-132
tolerance envelope temperature derating graph
2-20
typical characteristics
Note : All data taken at TA=25°C.
NMA SERIES
Isolated 1W Dual Output
temperature test (under full load)
2 - NMA SERIES
DC-DC Converters 2-21
mean time to failure (MTTF) in thousands of hours
Part Number --25°C 25°C 70°C
NMA0305 2182 1814 1501
NMA0309 819 701 603
NMA0312 403 347 303
NMA0315 219 189 166
NMA0505 1899 1614 1349
NMA0509 774 668 577
NMA0512 391 338 295
NMA0515 215 186 163
NMA1205 566 488 423
NMA1209 395 342 298
NMA1212 263 228 199
NMA1215 169 147 129
NMA2405 224 194 170
NMA2409 191 166 145
NMA2412 154 134 117
NMA2415 117 101 89
NMA4805 237 206 180
NMA4809 201 174 153
NMA4812 166 139 122
NMA4815 120 104 92
Note : MTTF figures derived from hybrid model of MIL-HDBK-217F.
NMA SERIES
Isolated 1W Dual Output
2-22
outline dimensions
14 Pin DIP package styles
recommended footprint details
All pins on a 2.54mm pitch.
All dimensions in mm XX.X 0.50, XX.XX 0.25
NMA SERIES
Isolated 1W Dual Output
12
2 - NMA SERIES
DC-DC Converters 2-23
Printed Face
outline dimensions
7 Pin SIP package styles
recommended footprint details
All pins on a 2.54mm pitch.
All dimensions in mm XX.X 0.50, XX.XX 0.25
NMA SERIES
Isolated 1W Dual Output
43
Printed Face
2-24