Figure 1. Simplifi ed Schematic
COMMON
(6)
+V
IN
(1)
–V
IN
(2)
PWM
CONTROLLER
OPTO
ISOLATION
REFERENCE &
ERROR AMP
COMPARATORS
UVLO & OVLO
ON/OFF
CONTROL
(3)
(OPTIONAL)
TRIM
(5)
(OPTIONAL)
+V
OUT
(4)
SWITCH
CONTROL
Typical topology is shown.
Typical units
FEATURES
1.2-2.5VOUT models source 6 Amps
3.3VOUT models source 4.25 Amps
5/12/15VOUT models deliver full 15 Watts
Synchronous-rectifi er topologies
Guaranteed effi ciencies to 88%
Choice of 3 input voltage ranges:
10-18V, 18-36V, 36-75V
–40 to +60/70C ambient w/o derating
Fully isolated (1500Vdc); I/O protected
Meets UL/IE/EN60950-1 certifi cation,
2nd Edition
CE mark (75VIN models)
Standard 1" x 2" packages and pinouts
Optional VOUT trim and on/off control
The new 1.2, 1.5V, 1.8V and 2.5V models in
Murata Power Solutions’ fl agship 7-15 Watt
A-Series can source a continuous 6 Amps. This
is the most "low-voltage" current available from
a standard 1" x 2" package, and these power
converters exemplify Murata Power Solutions’
relentless drive to bring you more power/current,
from standard packages, without compromising
reliability or resorting to thermal specmanship.
By combining a high-frequency, high-effi ciency
(to 88%), synchronous-rectifi er topology with
the newest components and time-tested, fully
automated, SMT-on-pcb construction, these
UWR Models are able to bring you 7-15W (@
up to 6A) in the standard 1" x 2" package from
which most competitors can only get 5-10W (@
3-4A). All UWR’s deliver their full output power
over ambient temperature ranges from –40°C
to as high as +70°C (model and input voltage
dependent) without heat sinks or supplemental
forced-air cooling. Devices derate to +100°C.
Output voltages are 1.2, 1.5, 1.8, 2.5, 3.3, 5,
12 or 15 Volts. Input voltage ranges are 10-18V
(D12 models), 18-36V (D24 models) or 36-75V
(D48 models). All models feature input pi fi lters,
input undervoltage and overvoltage lockout, input
reverse-polarity protection, output overvoltage
protection, output current limiting, and continuous
short-circuit protection. On/off control and output-
trim functions are optional (see Optional Functions).
All models are designed to meet IEC950, UL1950
and EN60950-1, 2nd Edition safety requirements.
D48models (36-75V inputs) are CE marked.
UWR 7-15W DC/DC’s are packaged in low-
cost, light-weight, diallyl phthalate (UL94V-0
rated) plastic packages with standoffs. EMC
compliance is achieved via a low-noise design
rather than through expensive metal shielding.
PRODUCT OVERVIEW
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www.murata-ps.com
www.murata-ps.com/support
For full details go to
www.murata-ps.com/rohs
　
UWR Models
Single Output,
High-Density,
6 Amp/15 Watt
DC/DC Converters
MDC_UWR_7-15.G05 Page 1 of 12
Performance Specifi cations and Ordering Guide ➀
➀ Typical at TA = +25°C under nominal line voltage and full-load conditions, unless otherwise noted.
➁ Ripple/Noise (R/N) is tested/speciifed over a 20MHz bandwidth. All models are specifi ed with
two external 0.47µF multi-layer ceramic capacitors located 2-3 inches from the module being
tested.
➂ Load regulation is specifi ed over 10%-100% load conditions. 1.5-5V models are stable and
regulate under no-load conditions. 12/15V models have minimum loading requirements See
Performance/Functional Specifi cations.
➃ Nominal line voltage, no-load/full-load conditions.
➄ See
page 12.
➅ Special trim version. See Trim Equations, page 5. Quantity order required.
➆ Please refer to the
Part Number Structure for additional options when ordering.
*Pins 3 and 5 are optional.
See Optional Functions and
Technical Notes for details.
Standard pin length is shown.
Please refer to the Part Number
Structure for special order pin
lengths.
Pin Function P22 Pin Function P22
1 +Vin 4 +Vout
2 –Vin 5 Trim*
3 On/Off Control* 6 Common
I/O Connections
For Part Number Structure, please see page 12.
MECHANICAL SPECIFICATIONS
Third Angle Projection
Dimensions are in inches (mm) shown for ref. only.
Components are shown for reference only.
Tolerances (unless otherwise specified):
.XX ± 0.02 (0.5)
.XXX ± 0.010 (0.25)
Angles ± 2˚
.475
12.07
.020 STANDOFF
(4 PLACES)
1.00
25.4
END VIEWSIDE VIEW
PLASTIC CASE
.20
MIN
MIN
2.00
50.8
5.1
6X .040±.002
1.02±0.05
6
5
4
3
1
2
BOTTOM VIEW
20.32
7.62
10.1612.70 .800
.800
2.5
.500
20.32
.400
.10
.300
.60
15.2
ORDERING GUIDE
Root Model ➆
Output Input Effi ciency Package
(Case, Pinout)
Vout
(Volts)
Iout
(mA)
R/N (mV p-p) ➁Regulation (max.) Vin nom.
(Volts)
Range
(Volts)
Iin
(mA) ➃
Typ. Max. Line Load ➂Min. Typ.
UWR-1.2/6000-D12A-C 1.2 6000 40 75 ±0.2% ±0.5% 12 10-18 80/769 76% 78% C14, P22
UWR-1.2/6000-D24A-C 1.2 6000 40 75 ±0.05% ±0.75% 24 18-36 45/375 78% 80% C14, P22
UWR-1.2/6000-D48A-C 1.2 6000 40 75 ±0.2% ±0.5% 48 36-75 80/188 78% 80% C14, P22
UWR-1.5/6000-D12A-C 1.5 6000 30 55 ±0.1% ±0.5% 12 10-18 75/914 77.5% 79.5% C14, P22
UWR-1.5/6000-D24A-C 1.5 6000 30 55 ±0.1% ±0.5% 24 18-36 40/454 78% 80% C14, P22
UWR-1.5/6000-D48A-C 1.5 6000 30 55 ±0.1% ±0.5% 48 36-75 25/226 78.5% 80.5% C14, P22
UWR-1.8/6000-D12A-C 1.8 6000 30 55 ±0.1% ±0.5% 12 10-18 70/1084 81% 83% C14, P22
UWR-1.8/6000-D24A-C 1.8 6000 30 55 ±0.1% ±0.5% 24 18-36 35/539 82.5% 84.5% C14, P22
UWR-1.8/6000-D48A-C 1.8 6000 30 55 ±0.1% ±0.5% 48 36-75 25/268 83% 85% C14, P22
UWR-2.5/6000-D12A-C 2.5 6000 30 55 ±0.1% ±0.5% 12 10-18 80/1489 83% 86% C14, P22
UWR-2.5/6000-D24A-C 2.5 6000 30 50 ±0.075% ±0.25% 24 18-36 45/727 84.75% 86% C14, P22
UWR-2.5/6000-D48A-C 2.5 6000 30 55 ±0.1% ±0.5% 48 36-75 25/367 84% 86% C14, P22
UWR-3.3/4250-D12A-C 3.3 4250 85 100 ±0.2% ±0.5% 12 10-18 80/1375 83% 86% C14, P22
UWR-3.3/4250-D24A-C 3.3 4250 45 70 ±0.2% ±0.5% 24 18-36 45/672 85% 87% C14, P22
UWR-3.3/4250-D48A-C 3.3 4250 85 100 ±0.2% ±0.5% 48 36-75 35/336 85% 87% C14, P22
UWR-3.3/4500-D48ANT-C ➄3.3 4500 85 100 ±0.2% ±0.5% 48 36-75 35/356 85% 87% C14, P22
UWR-5/3000-D12A-C 5 3000 85 100 ±0.2% ±0.3% 12 10-18 110/1471 83% 85% C14, P22
UWR-5/3000-D24A-C 5 3000 85 100 ±0.2% ±0.3% 24 18-36 55/710 85.5% 88% C14, P22
UWR-5/3000-D48A-C 5 3000 85 100 ±0.2% ±0.3% 48 36-75 35/355 85.5% 88% C14, P22
UWR-5/3000-D48ANST-C ➅5 3000 85 100 ±0.2% ±0.3% 48 36-75 35/355 85.5% 88% C14, P22
UWR-12/1250-D12A-C 12 1250 85 100 ±0.2% ±0.3% 12 10-18 45/1471 82.5% 85% C14, P22
UWR-12/1250-D24A-C 12 1250 85 100 ±0.2% ±0.3% 24 18-36 45/718 85% 87% C14, P22
UWR-12/1250-D48A-C 12 1250 85 100 ±0.2% ±0.3% 48 36-75 20/359 85% 87% C14, P22
UWR-15/1000-D12A-C 15 1000 85 100 ±0.2% ±0.3% 12 10-18 45/1471 82.5% 85% C14, P22
UWR-15/1000-D24A-C 15 1000 85 100 ±0.2% ±0.3% 24 18-36 45/718 85% 87% C14, P22
UWR-15/1000-D48A-C 15 1000 85 100 ±0.2% ±0.3% 48 36-75 20/359 85% 87% C14, P22
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UWR Models
Single Output,
High-Density,
6 Amp/15 Watt
DC/DC Converters
MDC_UWR_7-15.G05 Page 2 of 12
OBSOLETE
OBSOLETE
OBSOLETE
OBSOLETE
OBSOLETE
OBSOLETE
OBSOLETE
OBSOLETE
OBSOLETE
OBSOLETE
OBSOLETE
OBSOLETE
Dynamic Characteristics (continued)
Switching Frequency
1.2V models 250-300kHz ±30kHz, model dependent
1.5V D48 models 260kHz (±30kHz)
1.8V D12 models 280kHz (±30kHz)
1.8V D24 models 250kHz (±30kHz)
1.8V D48 models 210kHz (±20kHz)
2.5 and 1.5 D12/D24 models 340kHz (±40kHz)
3.3-12V models 310-345kHz ±10%, model dependent
Environmental
Operating Temperature (Ambient): –40 to +85°C with Derating
(See Derating Curves)
Case Temperature:
Maximum Allowable +100°C
Storage Temperature –40 to +105°C
Physical
Dimensions 2" x 1" x 0.475" (51 x 25 x 12.1mm)
Shielding None
Case Material Diallyl phthalate, UL94V-0 rated
Pin Material Gold-plated copper alloy with nickel underplate
Weight 1.4 ounces (39.7 grams)
➀ All models are specifi ed with two external 0.47µF multi-layer ceramic capacitors installed across
their output pins.
➁ See Minimum Output Loading Requirements under Technical Notes.
➂ See Technical Notes for details.
➃ The On/Off Control and Trim functions are optional and must be installed by MPS. See Optional
Functions or contact MPS for details.
➄ The On/Off Control is designed to be driven with open-collector logic or the application of appro-
priate voltages (referenced to –Input, pin 2). Applying a voltage to the On/Off Control pin when
no input voltage is applied to the converter may cause permanent damage. See Technical Notes.
➅ Output noise maybe further reduced with the addition of additional external output capacitors.
See Technical Notes.
➆ Operating temperature range without derating is model and input-voltage dependent. See
Temperature Derating.
➇ RoHS-6 hazardous substance compliance does not claim EU RoHS exemption 7b (lead in solder).
Performance/Functional Specifi cations
Typical @ TA = +25°C under nominal line voltage and full-load conditions, unless noted. ➀➁
These are stress ratings. Exposure of devices to greater than any of these conditions may
adversely affect long-term reliability. Proper operation under conditions other than those
listed in the Performance/Functional Specifi cations Table is not implied.
Input Voltage:
Continuous:
D12 Models 22 Volts
D24 Models 44 Volts
D48 Models 88 Volts
Transient (100msec):
D12 Models 50 Volts
D24 Models 50 Volts
D48 Models 100 Volts
Input Reverse-Polarity Protection Current must be <10 Amps. Brief duration
only. Fusing recommended.
Output Overvoltage Protection:
1.2V/1.5/1.8V Outputs 2.1/2.2/2.3 Volts, unlimited duration
2.5V/3.3V Outputs TBD/3.4/4.4 Volts, unlimited duration
5V/12V/15V Outputs 7.1/16/18 Volts, unlimited duration
Output Current Current limited. Devices can withstand sus-
tained output short circuits without damage.
Case Temperature +100°C
Storage Temperature –40 to +105°C
Lead Temperature See soldering guidelines
Absolute Maximum Ratings
Input
Input Voltage Range:
D12A Models 10-18 Volts (12V nominal)
D24A Models 18-36 Volts (24V nominal)
D48A Models 36-75 Volts (48V nominal)
Overvoltage Shutdown:
D12A Models 18.5-21 Volts (20V typical)
D24A Models 37-41 Volts (38V typical)
D48A Models 77-81 Volts (78.5V typical)
Start-Up Threshold: ➂
D12A Models 9.4-10 Volts (9.6V typical)
D24A Models 16.5-18 Volts (17V typical)
D48A Models 34-36 Volts (35V typical)
Undervoltage Shutdown: ➂
D12A Models 7-8.5 Volts (8V typical)
D24A Models 15.5-17.5 Volts (16.5V typical)
D48A Models 32.5-35.5 Volts (34V typical)
Input Current:
Normal Operating Conditions See Ordering Guide
Standby Mode (Off, OV, UV) 5mA
Input Filter Type Pi
Reverse-Polarity Protection Brief duration, 10A maximum
On/Off Control (Optional, Pin 3): ➃ ➄
D12AC, D24AC, & D48AC Models On = open or 13V to +VIN, IIN = 1-5mA typ.
Off = 0-0.8V, IIN = 3-12mA typ.
D12AN, D24AN, & D48AN Models On = 0-0.8V, IIN = 3-12mA typ.
Off = open or 3.3-5.5V, IIN = 1-5mA typ.
Output
VOUT Accuracy (50% load): ±1.5% (±2% for model UWR-1.2/6000)
Minimum Loading for Specifi cation: ➁
1.2V/1.5V/1.8V/2.5V/3.3V/5V Outputs No load
12V/15V Outputs 10% of IOUT max.
Minimum Loading for Stability: ➁
1.2V/1.5V/1.8V/2.5V/3.3V/5V Outputs No load
12V/15V Outputs 25mA
Ripple/Noise (20MHz BW) ➀ ➅ See Ordering Guide
Line/Load Regulation See Ordering Guide
Effi ciency See Ordering Guide
Isolation Voltage:
Input-to-Output 1500Vdc minimum (functional)
Isolation Capacitance 470pF
Isolation Resistance 100M
Current Limiting:
1.2V-5V Outputs Hiccup technique, auto-recovery
12V and 15V Outputs Power-limiting technique, auto-recovery
Overvoltage Protection Zener/transorb clamp, magnetic feedback
Temperature Coeffi cient ±0.04% per °C
Dynamic Characteristics
Transient Response (50% load step)
1.2V-2.5V models 200µsec max. to ±2% of fi nal value
3.3V-15V models 200µsec max. to ±1.5% of fi nal value
Start-Up Time: ➂
V
IN to VOUT 50msec
On/Off to VOUT 30msec
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UWR Models
Single Output,
High-Density,
6 Amp/15 Watt
DC/DC Converters
MDC_UWR_7-15.G05 Page 3 of 12
red camera is a another alternative which avoids the TC heatsinking effect.
But the IR camera must be calibrated frequently and accurately. Remember
too that it is quite diffi cult to accurately measure airfl ow right at the converter.
Murata Power Solutions uses a calibrated wind tunnel with large amounts
of data history. Because of thermal time constants, allow plenty of time for
temperature stabilization.
Trimming Output Voltages
These converters have a trim capability (pin 5) that allows users to adjust the
output voltage ±5%. Adjustments to the output voltage can be accomplished
via a trim pot, Figure 2, or a single fi xed resistor as shown in Figures 3 and 4.
A single fi xed resistor can increase or decrease the output voltage depend-
ing on its connection. Fixed resistors should have an absolute TCR less than
100ppm/°C to minimize sensitivity to changes in temperature.
A single resistor connected from the Trim (pin 5) to the +Output (pin 4), see
Figure 3, will decrease the output voltage. A resistor connected from the Trim
(pin 5) to Output Common (pin 6) will increase the output voltage.
Trim adjustment greater than 5% can have an adverse effect on the con-
verter's performance and is not recommended.
20kΩ
5-22
Tu r n s
+VIN +VOUT
COMMON
TRIM
–VIN
ON/OFF
CONTROL
1
2
3
4
5
LOAD
6
+VIN +VOUT
COMMON
TRIM
–VIN
ON/OFF
CONTROL
1
2
3
4
5
LOAD
6
RTRIM DOWN
+VIN +VOUT
COMMON
TRIM
–VIN
ON/OFF
CONTROL
1
2
3
4
5
LOAD
6
RTRIM UP
Figure 2. Trim Connections Using A Trim Pot
Figure 4. Trim Connections To Increase Output Voltage Using Fixed Resistors
Figure 3. Trim Connections To Decrease Output Voltage Using Fixed Resistors
Floating Outputs
Since these are isolated DC/DC converters, their outputs are "fl oating."
Designers will usually use the output Common (pin 6) as the ground/return of
the load circuit. You can, however, use the +Output (pin 4) as ground/return to
effectively reverse the output polarity.
Minimum Output Loading Requirements
1.2 to 5V models employ a synchronous-rectifi er design topology. All models
regulate within spec and are stable under no-load conditions. 12/15V models
employ a traditional forward architecture and require 10% loading (125mA for
12V models, 100mA for 15V models) to achieve their listed regulation specs.
12/15V models also have a minimum-load-for-stability requirement (20mA).
For 12/15V models, operation below 20mA or 10% loading will be stable but
regulation may degrade. A 100μF output capacitor is recommended below 10%
loading. Users should verify whether this relaxed regulation will have any effect
on output circuits. If so, add a small load of 10% or greater.
Operation under no-load conditions will not damage 12/15V converters.
However they may not meet all listed specifi cations.
Filtering and Noise Reduction
All A-Series UWR DC/DC Converters achieve their rated ripple and noise
specifi cations using the external input and output capacitors specifi ed in the
Performance/Functional Specifi cations table. In critical applications, input/
output noise may be further reduced by installing additional external I/O caps.
Input capacitors should be selected for bulk capacitance, low ESR and high
rms-ripple-current ratings. Output capacitors should be selected for low ESR and
appropriate frequency response. All caps should have appropriate voltage ratings
and be mounted 2-3 inches from the converter to achieve published ratings. The
most effective combination of external I/O capacitors will be a function of your
particular load and layout conditions.
Input Fusing
Certain applications and/or safety agencies may require the installation of
fuses at the inputs of power conversion components. Fuses should also be
used if the possibility of sustained, non-current-limited, input-voltage polarity
reversals exists. For MPS's A-Series UWR 7-15 Watt DC/DC Converters, you
should use fast-blow type fuses with values no greater than the following.
V
IN Range Fuse Value
"D12A" Models 3 Amps
"D24A" Models 2 Amps
"D48A" Models 1 Amp
Maximum Case Temperature
The +100 degree C. maximum outside case temperature specifi cation is based
on much empirical testing on encapsulated units. Those tests show that if
the case exterior can be maintained at or below +100C., the hottest internal
components’ package temperatures will not exceed +128C. because of the
internal temperature gradient to the exterior case. This latter +128C. internal
fi gure is a safety margin offering more protection for the internal components.
The +100C. case specifi cation must be achieved by the user’s combination of
lower output current and/or higher airfl ow.
If you attempt any of your own case temperature testing, please be aware of
the heatsinking effect of attaching wired thermocouples to surfaces. An infra-
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UWR Models
Single Output,
High-Density,
6 Amp/15 Watt
DC/DC Converters
MDC_UWR_7-15.G05 Page 4 of 12
–16.9
DOWN
RT (k7) = 3.3 – VO
2.49(VO – 1.27)
–16.9
UP
RT (k7) = VO – 3.3
3.16
–2
DOWN
RT (k7) = 1.5 – VO
1.6(VO – 1.23)
–2
UP
RT (k7) = VO – 1.5
1.968
–2.49
DOWN
RT (k7) = 1.8 – VO
0.995(VO – 1.24)
–2.49
UP
RT (k7) = VO – 1.8
1.23
–11
DOWN
RT (k7) = 2.5 – VO
2(VO – 1.24)
–11
UP
RT (k7) = VO – 2.5
2.48
–2
DOWN
RT (k7) = 1.2 – VO
5.32(VO – 0.7)
–2
UP
RT (k7) = VO – 1.2
3.73
–15
DOWN
RT (k7) = 5 – VO
2.49(VO – 2.527)
–15
UP
RT (k7) = VO – 5
6.292
–49.9
DOWN
RT (k7) = 12 – VO
6.34(VO – 5.714)
–49.9
UP
RT (k7) = VO – 12
36.23
DOWN
RT (k7) = 5.0 – VO
7.5(VO – 1.24)
–10
UP
RT (k7) = VO – 4.997
9.3
–63.4
DOWN
RT (k7) = 15 – VO
7.87(VO – 7.136)
–63.4
UP
RT (k7) = VO – 15
56.16
–8.25
where K =
DOWN
RT (k7) = K
1.27
UWR-3.3/4500-D48ANT
UP
RT (k7) =
3.3 – VO
3.3
where K = VO – 3.3
3.3
–6.2
K
0.78
Model Trim Equation Model Trim Equation
UWR-5/3000-D48ANST
UWR-12/1250-D12A
UWR-12/1250-D24A
UWR-12/1250-D48A
UWR-15/1000-D12A
UWR-15/1000-D24A
UWR-15/1000-D48A
UWR-5/3000-D12A
UWR-5/3000-D24A
UWR-5/3000-D48A
UWR-3.3/4250-D12A
UWR-3.3/4250-D24A
UWR-3.3/4250-D48A
UWR-1.5/6000-D12A
UWR-1.5/6000-D24A
UWR-1.5/6000-D48A
UWR-1.8/6000-D12A
UWR-1.8/6000-D24A
UWR-1.8/6000-D48A
UWR-2.5/6000-D12A
UWR-2.5/6000-D24A
UWR-2.5/6000-D48A
UWR-1.2/6000-D12A
UWR-1.2/6000-D24A
UWR-1.2/6000-D48A
Start-Up Threshold and Undervoltage Shutdown
Under normal start-up conditions, devices will not begin to regulate until the
ramping-up input voltage exceeds the Start-Up Threshold Voltage (35V for
"D48A" models). Once operating, devices will not turn off until the input volt-
age drops below the Undervoltage Shutdown/Lockout limit (34V for "D48A"
models). Subsequent re-start will not occur until the input is brought back up to
the Start-Up Threshold. This built-in hysteresis obviously avoids any indetermi-
nate on/off situations at a single voltage.
Start-Up Time
The VIN to VOUT Start-Up Time is the interval between the time at which a ramp-
ing input voltage crosses the turn-on threshold point and the fully-loaded output
voltage enters and remains within its specifi ed accuracy band. Actual measured
times will vary with input source impedance, external input capacitance, and the
slew rate and fi nal value of the input voltage as it appears to the converter.
The On/Off to VOUT Start-Up Time assumes the converter is turned off via the
On/Off Control with the nominal input voltage already applied to the converter.
The specifi cation defi nes the interval between the time at which the converter
is turned on and the fully-loaded output voltage enters and remains within its
specifi ed accuracy band.
Accuracy of adjustment is subject to tolerances or resistor values and
factory-adjusted output accuracy. VO = desired output voltage.
Soldering Guidelines
Murata Power Solutions recommends the specifi cations below when install-
ing these converters. These specifi cations vary depending on the solder type.
Exceeding these specifi cations may cause damage to the product. Be cautious
when there is high atmospheric humidity. Your production environment may
differ; therefore please thoroughly review these guidelines with your process
engineers.
Wave Solder Operations for through-hole mounted products (THMT)
For Sn/Ag/Cu based solders:
Maximum Preheat Temperature 115° C.
Maximum Pot Temperature 270° C.
Maximum Solder Dwell Time 7 seconds
For Sn/Pb based solders:
Maximum Preheat Temperature 105° C.
Maximum Pot Temperature 250° C.
Maximum Solder Dwell Time 6 seconds
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UWR Models
Single Output,
High-Density,
6 Amp/15 Watt
DC/DC Converters
MDC_UWR_7-15.G05 Page 5 of 12
Temperature Derating Curves for UWR 7-15W A-Series
Output Power (Watts)
Ambient Temperature (°C)
D24A and D48A Temperature Derating for 1.5V Output Models
10
9
8
7
6
5
4
3
2
1
0
–400 404550556065707580859095100
VIN = 18V-27V (D24A)
VIN = 36V-48V (D48A)
VIN = 18V-30V (D24A)
VIN = 36V-60V (D48A)
VIN = 18V-36V (D24A)
VIN = 36V-75V (D48A)
Output Power (Watts)
Ambient Temperature (°C)
D24A and D48A Temperature Derating for 1.8V Output Models
12
11
10
9
8
7
6
5
4
3
2
1
0
–400 404550556065707580859095100
VIN = 18V-27V (D24A)
VIN = 36V-48V (D48A)
VIN = 18V-30V (D24A)
VIN = 36V-60V (D48A)
VIN = 18V-36V (D24A)
VIN = 36V-75V (D48A)
Output Power (Watts)
Ambient Temperature (°C)
15.0
13.5
12.0
10.5
9.0
7.5
6.0
4.5
3
1.5
0
–400 404550556065707580859095100
VOUT = 2.5V, 5V, 12V and 15V
VOUT = 3.3V
VOUT = 1.8V
VOUT = 1.5V
VOUT = 1.2V
D12A (10-18V) Temperature Derating
Output Power (Watts)
Ambient Temperature (°C)
D24A and D48A Temperature Derating for 3.3V Output Models
14
12
10
8
6
4
2
0
–400 404550556065707580859095100
VIN = 18V-27V (D24A)
VIN = 36V-48V (D48A)
VIN = 18V-30V (D24A)
VIN = 36V-60V (D48A)
VIN = 18V-36V (D24A)
VIN = 36V-75V (D48A)
Output Power (Watts)
Ambient Temperature (°C)
15.0
13.5
12.0
10.5
9.0
7.5
6.0
4.5
3
1.5
0
–400 404550556065707580859095100
VIN = 18V-27V (D24A)
VIN = 36V-48V (D48A)
VIN = 18V-30V (D24A)
VIN = 36V-60V (D48A)
VIN = 18V-36V (D24A)
VIN = 36V-75V (D48A)
D24A and D48A Temperature Derating for 2.5/5/12 /15V Output Models
The thermal performance of A-Series UWR 7-15 Watt DC/DC Converters is
depicted in the derating curves shown below. All devices, when operated at full
load, in still ambient air, over their full specifi ed input voltage range, can safely
operate to TA maximum. All models, other than the D12A models (10-18 Volt
input range), can operate at higher ambient temperatures if the input range is
narrowed. For example, model UWR-5/3000-D48A can operate safely to +70°C
if the input range is kept between 36 and 48 Volts.
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UWR Models
Single Output,
High-Density,
6 Amp/15 Watt
DC/DC Converters
MDC_UWR_7-15.G05 Page 6 of 12
90
85
80
75
70
65
60
55
50
45
Load Current (Amps)
Efficiency (%)
V
IN
= 10V
V
IN
= 12V
V
IN
= 18V
0.6 1.2 1.8 2.4 3 3.6 4.2 4.8 5.4 6
UWR-1.8/6000-D12A Efficiency vs. Line and Load
90
85
80
75
70
65
60
55
50
45
Load Current (Amps)
Efficiency (%)
V
IN
= 36V
V
IN
= 48V
V
IN
= 75V
0.6 1.2 1.8 2.4 3 3.6 4.2 4.8 5.4 6
UWR-1.8/6000-D48A Efficiency vs. Line and Load
90
85
80
75
70
65
60
55
50
45
Load Current (Amps)
Efficiency (%)
V
IN
= 18V
V
IN
= 24V
V
IN
= 36V
0.6 1.2 1.8 2.4 3 3.6 4.2 4.8 5.4 6
UWR-1.8/6000-D24A Efficiency vs. Line and Load
85
80
75
70
65
60
55
50
45
40
35
Load Current (Amps)
Efficiency (%)
V
IN
= 36V
V
IN
= 48V
V
IN
= 75V
0.6 1.2 1.8 2.4 3 3.6 4.2 4.8 5.4 6
UWR-1.5/6000-D48A Efficiency vs. Line and Load
85
80
75
70
65
60
55
50
45
40
35
Load Current (Amps)
Efficiency (%)
V
IN
= 18V
V
IN
= 24V
V
IN
= 36V
0.6 1.2 1.8 2.4 3 3.6 4.2 4.8 5.4 6
UWR-1.5/6000-D24A Efficiency vs. Line and Load
85
80
75
70
65
60
55
50
45
40
35
Load Current (Amps)
Efficiency (%)
V
IN
= 10V
V
IN
= 12V
V
IN
= 18V
0.6 1.2 1.8 2.4 3 3.6 4.2 4.8 5.4 6
UWR-1.5/6000-D12A Efficiency vs. Line and Load
Typical Performance Curves for UWR 7-15W A-Series
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UWR Models
Single Output,
High-Density,
6 Amp/15 Watt
DC/DC Converters
MDC_UWR_7-15.G05 Page 7 of 12
90
85
80
75
70
65
60
55
50
45
UWR-3.3/4250-D12A Efficiency vs. Line and Load
Load Current (Amps)
Efficiency (%)
V
IN
= 10V
V
IN
= 12V
V
IN
= 18V
0.4 0.9 1.4 1.8 2.3 2.8 3.3 3.8 4.3
90
85
80
75
70
65
60
55
50
45
UWR-3.3/4250-D24A Efficiency vs. Line and Load
Load Current
(
Am
p
s
)
Efficiency (%)
V
IN
= 18V
V
IN
= 24V
V
IN
= 36V
0.4 0.9 1.4 1.8 2.3 2.8 3.3 3.8 4.3
90
85
80
75
70
65
60
55
50
45
UWR-3.3/4250-D48A Efficiency vs. Line and Load
0.4 0.9 1.4 1.8 2.3 2.8 3.3 3.8 4.3
Load Current (Amps)
Efficiency (%)
V
IN
= 36V
V
IN
= 48V
V
IN
= 75V
90
85
80
75
70
65
60
55
50
45
Load Current (Amps)
Efficiency (%)
V
IN
= 18V
V
IN
= 24V
V
IN
= 36V
0.6 1.2 1.8 2.4 3 3.6 4.2 4.8 5.4 6
UWR-2.5/6000-D24A Efficiency vs. Line and Load
90
85
80
75
70
65
60
55
50
45
Load Current (Amps)
Efficiency (%)
V
IN
= 10V
V
IN
= 12V
V
IN
= 18V
0.6 1.2 1.8 2.4 3 3.6 4.2 4.8 5.4 6
UWR-2.5/6000-D12A Efficiency vs. Line and Load
90
85
80
75
70
65
60
55
50
45
Load Current (Amps)
Efficiency (%)
V
IN
= 36V
V
IN
= 48V
V
IN
= 75V
0.6 1.2 1.8 2.4 3 3.6 4.2 4.8 5.4 6
UWR-2.5/6000-D48A Efficiency vs. Line and Load
Typical Performance Curves for UWR 7-15W A-Series
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UWR Models
Single Output,
High-Density,
6 Amp/15 Watt
DC/DC Converters
MDC_UWR_7-15.G05 Page 8 of 12
90
85
80
75
70
65
60
55
50
45
40
UWR-5/3000-D12A Efficiency vs. Line and Load
Load Current (Amps)
Efficiency (%)
V
IN
= 10V
V
IN
= 12V
V
IN
= 18V
0.3 0.6 1.0 1.3 1.7 2 2.3 2.7 3
90
85
80
75
70
65
60
55
50
45
40
UWR-5/3000-D24A Efficiency vs. Line and Load
Load Current (Amps)
Efficiency (%)
V
IN
= 18V
V
IN
= 24V
V
IN
= 36V
0.3 0.6 1.0 1.3 1.7 2 2.3 2.7 3
90
85
80
75
70
65
60
55
50
45
40
UWR-5/3000-D48A Efficiency vs. Line and Load
0.3 0.6 1.0 1.3 1.7 2 2.3 2.7 3
Load Current (Amps)
Efficiency (%)
V
IN
= 36V
V
IN
= 48V
V
IN
= 75V
90
85
80
75
70
65
60
55
50
UWR-12/1250-D12A Efficiency vs. Line and Load
Load Current
(
Am
p
s
)
Efficiency (%)
V
IN
= 10V
V
IN
= 12V
V
IN
= 18V
0.1 0.2 0.4 0.5 0.7 0.8 1.0 1.1 1.3
90
85
80
75
70
65
60
55
50
UWR-12/1250-D24A Efficiency vs. Line and Load
Load Current (Amps)
Efficiency (%)
V
IN
= 18V
V
IN
= 24V
V
IN
= 36V
0.1 0.2 0.4 0.5 0.7 0.8 1.0 1.1 1.3
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Typical Performance Curves for UWR 7-15W A-Series
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UWR Models
Single Output,
High-Density,
6 Amp/15 Watt
DC/DC Converters
MDC_UWR_7-15.G05 Page 9 of 12
90
85
80
75
70
65
60
55
UWR-15/1000-D12A Efficiency vs. Line and Load
0.1 0.2 0.3 0.4 0.6 0.7 0.8 0.9 1
Load Current (Amps)
Efficiency (%)
V
IN
= 10V
V
IN
= 12V
V
IN
= 18V
90
85
80
75
70
65
60
55
UWR-15/1000-D24A Efficiency vs. Line and Load
Load Current (Amps)
Efficiency (%)
V
IN
= 18V
V
IN
= 24V
V
IN
= 36V
0.1 0.2 0.3 0.4 0.6 0.7 0.8 0.9 1
90
85
80
75
70
65
60
55
UWR-15/1000-D48A Efficiency vs. Line and Load
Load Current (Amps)
Efficiency (%)
V
IN
= 36V
V
IN
= 48V
V
IN
= 75V
0.1 0.2 0.3 0.4 0.6 0.7 0.8 0.9 1
Output Ripple and Noise (PARD)
(VIN = nominal, VOUT = 1.8V @ 6A, two external 0.47μF output capacitors.)
20mV, 1μsec/div, 20MHz BW
Output Ripple and Noise (PARD)
(VIN = nominal, VOUT = 1.5V @ 6A, two external 0.47μF output capacitors.)
20mV, 1μsec/div, 20MHz BW
90
85
80
75
70
65
60
55
50
UWR-12/1250-D48A Efficiency vs. Line and Load
0.1 0.2 0.4 0.5 0.7 0.8 1.0 1.1 1.3
Load Current (Amps)
Efficiency (%)
V
IN
= 36V
V
IN
= 48V
V
IN
= 75V
Typical Performance Curves for UWR 7-15W A-Series
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UWR Models
Single Output,
High-Density,
6 Amp/15 Watt
DC/DC Converters
MDC_UWR_7-15.G05 Page 10 of 12
20mV, 1μsec/div, 20MHz BW
Output Ripple and Noise (PARD)
(VIN = nominal, VOUT = 12V @ 1.25A, two ext. 0.47μF output capacitors.)
Output Ripple and Noise (PARD)
(VIN = nominal, VOUT = 15V @ 1A, two external 0.47μF output capacitors.)
20mV, 2.5μsec/div, 20MHz BW
20mV, 1μsec/div, 20MHz BW
Output Ripple and Noise (PARD)
(VIN = nominal, VOUT = 3.3V @ 4.25A, two ext. 0.47μF output capacitors.)
20mV, 1μsec/div, 20MHz BW
Output Ripple and Noise (PARD)
(VIN = nominal, VOUT = 5V @ 3A, two external 0.47μF output capacitors.)
Output Ripple and Noise (PARD)
(VIN = nominal, VOUT = 2.5V @ 6A, two external 0.47μF output capacitors.)
20mV, 1μsec/div, 20MHz BW
Typical Performance Curves for UWR 7-15W A-Series
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UWR Models
Single Output,
High-Density,
6 Amp/15 Watt
DC/DC Converters
MDC_UWR_7-15.G05 Page 11 of 12
Optional Functions
The A-Series 7-15W DC/DC Converters offer numerous electrical/ mechanical
options. Per the Ordering Guide on page 2, the trailing "A" (A-Series) in each
part number pertains to the base part number. Part-number suffi xes are added
after the "A," indicating the selection of standard options. The resulting part
number is a "standard product" and is available to any customer desiring that
particular combination of options. As described below, selecting certain options
will result in the installation of additional pins in certain locations.
Suffi x Description
Blank No VOUT Trim or On/Off Control functions added (no I/O pins
installed in the pin 3 and pin 5 positions). The pin length remains at
0.2inches (5.08 mm).
TAdd a VOUT Trim function on pin 5. No pin 3 installed.
CAdd an On/Off Control function on pin 3 (with positive polarity). No
pin 5 installed.
CT Add the On/Off Control function (with positive polarity) on pin 3 and
add the VOUT trim function on pin 5.
NAdd an On/Off Control function on pin 3 with negative polarity. No
pin 5 installed.
NT Add the On/Off Control function with negative polarity on pin 3 and
add the VOUT trim function on pin 5.
L1 Trim the pin length to 0.110 ±0.010 inches (2.79 ±0.25mm). This
option requires a minimum order quantity.
L2 Trim the pin length to 0.145 ±0.010 inches (3.68 ±0.25mm). This
option requires a minimum order quantity.
-C RoHS-6 hazardous substance compliance (does not claim EU RoHS
exemption 7b, lead in solder).
* Note: Usage of consecutive "C" and "-C" designations is correct for some
models. Example: UWR-5/3000-D48AC-C
Adaptations
There are various additional confi gurations available on A-Series 7-15W DC/DCs.
Because designating each of them with a standard part-number suffi x would
result in an unmanageable matrix of part numbers, such are designated by
MPS and assigned 5-digit "part-number suffi xes.
UWR-3.3/4250-D48AT-30690
Standard product, 48VIN, 3.3VOUT/4.25A with a VOUT Trim function added in
the pin 3 position, with adapted current limit set point to 6.5A min. and with
removed Input Overvoltage Shutdown function.
UWR-5/3000-D48ACT-30770
UWR-5/3000-D48ACT-30770-Y (RoHS-5)
Standard product, 48VIN, 5VOUT/3A. On/Off Control function (positive polarity)
onpin 3, VOUT, Trim function added on pin 5. Adaptations: Trim equations are
Tyco/Lucent-compatible. Transformer isolation system has been enhanced to
meet the basic insulation requirements of UL60950-1/EN60950-1. I/O pins
are 25-mil-square Tyco/Lucent compatible. Shielded metal case is connected
to +VIN pin 1. Input Overvoltage Shutdown function has been removed.
UWR-3.3/4500-D48ANT
Standard UWR-3.3/4250-D48A, 48VIN, 3.3VOUT with slightly higher output
current (4.5A), negative on/off polarity control and a special competitive-
compatible trim.
UWR-3.3/4500-D48ANT accepts trim adjustments to ±10% of nominal VOUT
not to exceed 15W of maximum output power. Users should carefully consider
the amount of trim added since excessive positive trim may exceed the
overvoltage protection. Excessive negative trim may interfere with proper
regulation.
UWR-3.3/4500-D48ANST Special trim version. See page 5.
UWR-5/3000-D48ANSTHL2-Y
UWR-3.3/4500-D48ANTHL2-Y
Negative on/off polarity, special trim, conformal coating added, 3.68mm pin
length, RoHS-5 compliance (with lead). RoHS-5 compliance requires a sched-
uled quantity order. Not all RoHS-5 “-Y” models are available. Please contact
Product Marketing for further information.
Wide Range Input
Output Confi guration:
U = Unipolar
Nominal Output Voltage:
1.2, 1.5, 1.8, 2.5, 3.3, 5, 12 or 15 Volts
Maximum Output Current
in mA
Input Voltage Range:
D12 = 10-18 Volts (12V nominal)
D24 = 18-36 Volts (24V nominal)
D48 = 36-75 Volts (48V nominal)
U WR 3000-/ D48 A-5 CT
A-Series
High Reliability
Optional Functions
LX
*Note: Not all model number combinations may be available. Contact MPS.
C-
RoHS-6 Compliant*
PART NUMBER STRUCTURE
www.murata-ps.com/support
Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other
technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply
the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifi cations are subject to change without
notice. © 2013 Murata Power Solutions, Inc.
Murata Power Solutions, Inc.
11 Cabot Boulevard, Mansfi eld, MA 02048-1151 U.S.A.
ISO 9001 and 14001 REGISTERED
This product is subject to the following operating requirements
and the Life and Safety Critical Application Sales Policy:
Refer to: http://www.murata-ps.com/requirements/
UWR Models
Single Output,
High-Density,
6 Amp/15 Watt
DC/DC Converters
MDC_UWR_7-15.G05 Page 12 of 12