UST Models
www.murata-ps.com
3W, Single Output DC/DC Converters
PRODUCT OVERVIEW
FEATURES
Lowest cost! Highest reliability!
100% SMT-on-pcb, including magnetics
100% automatically assembled
Standard "DIP" package and pinouts
Fully isolated, 1000Vdc guaranteed
5, 12 or 15 Volt outputs
Choice of 3 wide-range inputs:
4.5-9 Volts
9-18 Volts
18-72 Volts
Rarely has a Series of low-power DC/DC
converters been defined by both low cost and
Murata Power Solutions' made-in-the-USA quality
and reliability. Our new UST Series of single-output
DC/DC’s achieves this best-of-both-worlds status
by implementing a proven circuit architecture
(170-200kHz flyback design) as a full, SMT-on-pcb
assembly (including surface-mount magnetics) that
is truly 100% automatically assembled. Packaged
in miniature 1.25" x 0.8", DIP-like plastic packages
(UL94V-0 rated) and requiring no external components, UST Series DC/DC’s bring true componentlike convenience to designers of today’s distributed
power systems.
Output voltages are 5, 12 or 15 Volts. Input
voltage ranges are 4.5-9V ("D5" models), 9-18V
("D12" models) or an ultra-wide 18-72V ("D48"
models). UST DC/DC’s are fully isolated (1000Vdc
guaranteed) and include input (pi type) and output
filters within their package. Output transient
response is a quick 200µsec, while output ripple
and noise are typically 75mVp-p.
These rugged modules are fully encapsulated
with a thermally conductive potting compound that
contributes to their outstanding moisture/vibration
resistance and impressive MTBF. They operate over
the full –40 to +75°C temperature range without
derating. All models have been thoroughly characterized (electrically, mechanically and thermally),
qualified (including HALT), and EMI/EMC tested.
Additionally, they are certified to UL1950, CSA 22.2
No. 950 and IEC950.
Murata Power Solutions' UST Model 3W DC/
DC’s are excellent selections for telecom/datacom,
computer and process-control applications demanding small size, low cost and high reliability. If required,
their design "flexibility" allows for easy modification to
your application-specific requirements.
Guaranteed efficiencies to 73%
–40 to +75°C full-power operation
Internal input/output filtering
UL1950/C22.2 No. 950/IEC950 certified
Modifications and customs for OEM’s
+VOUT
+VIN
COMMON
–VIN
PWM
CONTROLLER
OPTO
ISOLATION
REFERENCE &
ERROR AMP
Figure 1. Simplified Block Diagram
For full details go to
www.murata-ps.com/rohs
www.murata-ps.com/support
MDC_UST_3W.E01 Page 1 of 4
UST Models
Performance Specifications and Ordering Guide
3W, Single Output DC/DC Converters
➀
Output
Model ➄
UST-5/500-D12-C
UST-5/500-D48-C
UST-12/250-D12-C
UST-12/250-D48-C
UST-15/200-D12-C
UST-15/200-D48-C
UST-5/500-D5-C
UST-12/250-D5-C
UST-15/200-D5-C
VOUT
(Volts)
IOUT
(mA, Max.)
5
5
12
12
15
15
5
12
15
500
500
250
250
200
200
500
250
200
Input
Regulation (Max.) ➂
Line
Load
R/N (mVp-p) ➁
Typ.
Max.
75
75
75
75
75
75
75
75
75
120
120
150
150
150
150
120
150
150
±0.2%
±0.2%
±0.5%
±0.5%
±0.5%
±0.5%
±0.2%
±0.5%
±0.5%
±0.5%
±0.5%
±0.5%
±0.5%
±0.5%
±0.5%
±0.5%
±0.5%
±0.5%
VIN Nom.
(Volts)
Range
(Volts)
IIN ➃
(mA)
12
48
12
48
12
48
5
5
5
9-18
18-72
9-18
18-72
9-18
18-72
4.5-9
4.5-9
4.5-9
25/282
7/69
25/338
8/81
25/333
8/81
18/676
30/800
30/800
Package
(Case,
Pinout)
Efficiency
Min.
Typ.
70%
71%
72%
73%
73%
73%
72%
73%
73%
74%
75%
74%
77%
75%
77%
74%
75%
75%
C1, P1
C1, P1
C1, P1
C1, P1
C1, P1
C1, P1
C1, P1
C1, P1
C1, P1
As of September 2014, ONLY the following part numbers will be available: UST-5/500-D12-C; UST-5/500-D48-C;
UST-12/250-D48-C; UST-15/200-D48-C
➀
➁
➂
➃
➄
PART NUMBER STRUCTURE
Typical at TA = +25°C under nominal line voltage and full-load conditions unless otherwise noted.
Ripple/Noise (R/N) measured over a 20MHz bandwidth.
10% to 100% load.
Nominal line voltage, no-load/full-load conditions.
These are not complete model numbers. Please refer to the part number structure when ordering.
MECHANICAL SPECIFICATIONS
1.25
(31.75)
U ST - 5 / 500 - D48 - C
RoHS-6
compliant*
Output Configuration:
U = Unipolar
0.45
(11.43)
Input Voltage Range:
D5 = 4.5-9 Volts (5V nominal)
D12 = 9-18 Volts (12V nominal)
D48 = 18-72 Volts (48V nominal)
Product Series
Nominal Output Voltage:
5, 12 or 15 Volts
STANDOFFS
0.025
(0.64)
Case C1
0.020 ±0.002 DIA.
(0.508 ±0.051)
0.600
(15.24)
Maximum Output Current
in mA
0.15 MIN
(3.81)
* Contact Murata Power Solutions
for availability.
0.200
(5.08)
0.18
(4.57)
0.100
(2.54)
TEMPERATURE DERATING
3 4
7
8
1 2
5
6
0.600
(15.24)
Output Power vs. Ambient Temperature
VIN Nominal, Natural Convection
3.5
BOTTOM VIEW
3
PLASTIC CASE WITH AN INSULATED BASE
Output Power (Watts)
0.80
(20.32)
2.5
0.10
(2.54)
DIMENSIONS ARE IN INCHES (MM)
2
1.5
I/O Connections
1
0.5
0
–40
0
15
20
25
30
35
40
45
50
55
60
65
70
Ambient Temperature (˚C)
75
80
85
90
95 100
Pin
1
2
3
4
5
6
7
8
Function P1
+Vin
+Vin
–Vin
–Vin
Common
+Vout
Common
+Vout
Dimensions are in inches (mm shown for ref. only).
Third Angle Projection
Tolerances (unless otherwise specified):
.XX ± 0.02 (0.5)
.XXX ± 0.010 (0.25)
Angles ± 2˚
Components are shown for reference only.
www.murata-ps.com/support
MDC_UST_3W.E01 Page 2 of 4
UST Models
3W, Single Output DC/DC Converters
Performance/Functional Specifications
Typical @ TA = +25°C under nominal line voltage and full-load conditions, unless noted. ➀
Input
Input Voltage Range:
"D5" Models
"D12" Models
"D48" Models
4.5-9 Volts (5V nominal)
9-18 Volts (12V nominal)
18-72 Volts (48V nominal)
Absolute Maximum Ratings
Input Current
See Ordering Guide
Input Voltage:
"D5" Models
"D12" Models
"D48" Models
Input Filter Type ➁
Pi
Input Reverse-Polarity Protection
Current must be
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