KDC_NMTC.E02 Page 1 of 4

www.murata-ps.com

NMT Series

Triple Output 3W DC/DC Converters

For full details go to

www.murata-ps.com/rohs

　

SELECTION GUIDE

Order Code

Nominal

Input

Voltage

Output

Rated

Output

Current

Min. Load Full Load Min. Load Full Load

V

V

mA

mA

mA

mA

kHrs

NMT0572SC

5

-24

1.4

42

4.2

126

145

-48

0.7

21

2.1

63

-72

0.5

14

1.4

42

NMT1272SC

12

-24

1.4

42

4.2

126

145

-48

0.7

21

2.1

63

-72

0.5

14

1.4

42

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.

INPUT CHARACTERISTICS

Parameter

Conditions

Min.

Typ.

Max.

Units

Voltage range

NMT0572SC

4.5

5.0

5.5

V

NMT1272SC

10.8

12

13.2

NMT0572SC

85

mA

NMT1272SC

66

Zero load input current

NMT0572SC, 0% output load

50

80

mA

NMT1272SC, 0% output load

27.5

50

OUTPUT CHARACTERISTICS

Parameter

Conditions

Min.

Typ.

Max.

Units

Total of all outputs or any single output

0.1

3.0

W

Single Channel Voltage Set

Point Accuracy

0

10

%

-7.5

2.5

24

26.4

V

22.2

24.6

48

52.8

44.4

49.2

72

79.2

66.6

73.8

Line regulation

1.01

1.2

%

Load regulation

8

15

Ripple & Noise

DC to 20MHz single channel (24V)

220

400

mV

ISOLATION CHARACTERISTICS

Parameter

Conditions

Min.

Typ.

Max.

Units

Isolation test voltage

Flash tested for 1 second

1000

VDC

Isolation Capacitance

NMT0572SC, 1MHz, 1V

65

pF

NMT1272SC, 1MHz, 1V

130

Insulation Resistance

1000VDC

1

10

GΩ

ABSOLUTE MAXIMUM RATINGS

1 second

Lead temperature 1.5mm from case for 10 seconds

300°C

7V

15V

1. Assuming all 3 channels are equally loaded.

2. Assuming only 1 channel is loaded.

3. Calculated using MIL-HDBK-217F with nominal input voltage at full load.

4. Supply voltage must be disconnected at the end of the short circuit duration.

FEATURES

RoHS compliant

Triple outputs (-24V, -48V & -72V)

Input/output isolation 1kVDC

Power sharing on outputs

Industrial temperature range

UL 94V-0 package material

Internal SMD construction

Toroidal magnetics

No external components required

DESCRIPTION

The NMT series is a range of DC/DC convert-

ers offering three output voltages of -24V, -48V

and -72V from a single isolated 5V or 12V input

voltage. The product is designed for use with

telecommunications circuits requiring an on board

supply for the -72V RING-TIP connection service

generated from a nominal 5V or 12V DC input

supply rail. The device also offers battery level

voltages of -24V and -48V for access control and

data pump IC’s. The product is packaged in an

8 pin SIP case for minimum PCB footprint. The

rated power may be shared or drawn from any

one output providing the total output load does not

exceed 3W.