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UQQ Series
Wide Input Range Single Output DC-DC Converters
For applications requiring wide range input, improved electrical and
thermal perfomance consider Murata Power Solutions’ new UQQ
Series “Quarter-Brick” DC-DC Converters. They measure just 1.45
x 2.22 x 0.43 inches (36.8 x 56.4 x 10.92mm) and fit the industry-
standard footprint.
Typical unit
FEATURES
Standard quarter-brick package/pinout in
through-hole version
cost; Low profile, 0.43" (10.92mm)
Low
9-36V or 18-75V wide range inputs
Output current: 4 to 25 Amps
Output voltages: 3.3, 5, 12, 15 or 24V
Interleaved synchronous-rectifier topology
Ultra high efficiency
Outstanding thermal performance
On/off control, trim & sense functions
isolated, up to 2250Vdc (48 V
IN
)
Fully
Output overvoltage protection
I/O protected; Thermal shutdown
Fully
ed to UL/EN/IEC60950-1, 2nd Edition
Certifi
safety approvals
hazardous substance compliant
RoHS
PRODUCT OVERVIEW
From an 9-36V or 18-75V input, UQQ’s deliver
outputs of 3.3V, 5V,12V,15V, or 24V. They employ
an interleaved, synchronous-rectifier topology that
exploits 100% of their duty cycle. They simultane-
ously achieve ultra-high efficiency, tight line/load
regulation, low noise, and quick step response.
A state of the art, single-board, open-frame
design with reduced component count, high
efficiency, low-on-resistance FET’s, and planar
magnetics embedded in heavy-copper pc boards
all contribute to impressive thermal derating.
The UQQ’s feature set includes high isolation,
input pi filters, input undervoltage shutdown, output
overvoltage protection, current limiting, short-circuit
protection and thermal shutdown. The standard
footprint carries on/off control (positive or negative
polarity), output trim (+10/–20%) and output sense
functions.
All UQQ quarter-bricks are designed with full
magnetic and optical isolation up to 2250 Volts DC
(basic insulation).
Figure 1. Connection Diagram
Typical topology is shown.
For full details go to
www.murata-ps.com/rohs
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MDC_UQQ.D03
Page 1 of 18
UQQ Series
Wide Input Range Single Output DC-DC Converters
PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE
Output
Root Model
UQQ-3.3/25-Q12P-C
UQQ-3.3/25-Q48N-C
UQQ-5/17-Q12P-C
UQQ-5/20-Q48N-C
UQQ-12/8-Q12P-C
UQQ-12/8-Q48N-C
UQQ-15/7-Q12P-C
UQQ-24/4-Q12P-C
V
OUT
(V)
3.3
3.3
5
5
12
12
15
24
I
OUT
(A)
25
25
17
20
8
8
7
4
Power
(Watts)
82.5
82.5
85
100
96
96
105
96
R/N (mVp-p)
Typ.
50
80
40
100
40
120
56
125
Max.
80
125
75
140
75
160
100
170
Line
±0.05%
±0.05%
±0.05%
±0.05%
±0.05%
±0.05%
±0.05%
±0.05%
Regulation
Load
±0.125%
±0.2%
±0.06%
±0.165%
±0.05%
±0.1%
±0.1%
±0.075%
V
IN
Nom.
(Volts)
12
48
12
48
12
48
12
12
Range
(Volts)
9-36
18-75
9-36
18-75
9-36
18-75
9-36
10-36
➀
Input
I
IN
, no load
I
IN
, full load
(mA)
(A)
180
80
150
65
180
70
250
120
7.81
2.01
7.83
2.47
8.99
2.3
9.78
8.99
Efficiency
Min.
86%
86%
88.5%
82.5%
87%
85%
88%
87.7
Typ.
88%
88%
90.5%
84.5%
89%
87%
89.5%
89%
Package
(Case/
Pinout)
C68,P32
C68,P32
C68,P32
C68,P32
C68,P32
C68,P32
C68,P32
C68,P32
Typical at TA = +25°C under nominal line voltage and full-load conditions. All models are
specified with an external 1µF multi-layer ceramic and 10µF capacitors across their output pins
and 100µF external input capacitor.
Ripple/Noise (R/N) measured over a 20MHz bandwidth.
Devices have no minimum-load requirements and will regulate under no-load conditions.
Regulation specifications describe the output voltage deviation as the line voltage or load is
varied from its nominal/midpoint value to either extreme. (Load step = 50%.)
Nominal line voltage, no load/full load condition.
Please refer to the Part Number Structure for additional part numbers and options.
➅
RoHS does not claim EU exemption 7B–lead in solder.
PART NUMBER STRUCTURE
U QQ
-
5
/
17
-
Q12 N B 9 Lx
-
C
Unipolar Single Output
Quarter-Brick Package
Nominal Output Voltage
Maximum Rated Output
Input Voltage Range
Q12 = 9-36V
Q48 = 18-75V
Remote On/Off Control Polarity:
Add "P" for positive polarity
Add "N" for negative polarity
Some model options may require minimum order quantities.
RoHS-6 hazardous substance compliant
(does not claim EU RoHS exemption 7b, lead in solder)
Pin Length Option
Blank
= Std. pin length
L1
= 0.110 (2.79mm)*
L2
= 0.145 (3.68mm)*
Baseplate Pin 9
(special order):
Blank
= No pin 9, standard
9
= Pin 9 installed, connects to baseplate
Baseplate (optional):
Blank
= no baseplate standard
B
= baseplate installed, special order
*
Special quantity order is required;
no sample quantities available.
Note:
Some model number combinations
may not be available. Please contact
Murata Power Solutions.
Pin 9 Baseplate Connection
The UQQ series may include an optional installed baseplate for extended
thermal management. This baseplate is electrically isolated from the rest of the
converter. Various UQQ models are also available with an additional pin 9 on
special quantity order which electrically connects to the baseplate. Pin 9 is also
isolated from the rest of the converter. Please refer to the mechanical drawings.
Pin 9 offers a positive method of controlling the electrical potential of the base-
plate, independent of the converter. If you do not include pin 9, the baseplate
may also be grounded by the mounting bolts.
The baseplate may be ordered by adding a “B” to the model number tree
and pin 9 will be pre-installed by adding a “9”. The two options are separate.
Please refer to the Ordering Guide.
Do not order pin 9 without the baseplate.
Note that “pin 9” converters may be on limited forecast, requiring minimum
order quantities and scheduled deliveries.
Please see page 9 for heatsink information.
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MDC_UQQ.D03
Page 2 of 18
UQQ Series
Wide Input Range Single Output DC-DC Converters
FUNCTIONAL SPECIFICATIONS
UQQ-3.3/25-Q12
UQQ-3.3/25-Q48
UQQ-5/17-Q12
See ordering guide
9.0 Volts (18)
8.0 Volts
37.5 Volts
75mAp-p
See ordering guide
0.1A
2
sec
100mA
150mA
10.44 Amps
8mA
L-C
External Fusing
Required (15)
UQQ-5/20-Q48
UQQ-12/8-Q12
INPUT
Input Voltage Range
Start-up Threshold
Undervoltage Shutdown
Overvoltage Shutdown
Reflected (back) ripple current
(2)
Input Current
Full load conditions
Inrush transient
Output short circuit
No load
Low line (V
IN
= min.)
Standby mode
(Off, UV, OT shutdown)
Internal Input Filter Type
Reverse Polarity Protection
Remote On/Off Control
(5)
Positive logic (“P” suffix)
Negative logic (“N” suffix)
On/Off Current
1 mA
9.0 Volts (18)
8.0 Volts
37.5 Volts
25mAp-p
17.50 Volts
16.75 Volts
None
15mAp-p
17.5 Volts
15.75 Volts (I
OUT
= ØA)
None
80mAp-p
9.0 Volts (18)
8.0 Volts
37.5 Volts
75mAp-p
250mA
150mA
10.4 Amps
30mA
LC
External Fusing
Required (15)
100mA
80mA
5.18 Amps
30mA
Pi-type
External Fusing
Required (15)
50mA
65mA
6.24 Amps
30mA
L-C
External Fusing
Required (15)
250mA
180mA
12.12 Amps
30mA
L-C
External Fusing
Required (15)
OFF = Ground pin to +0.8V max. ON = open or +3.5-15V max.
OFF = open or +5 to +V
IN
max. ON = Ground pin to +0.8V max. (16)
1 mA
1 mA
See ordering guide
±1% of V
NOM
±10% of V
NOM
±10% of V
NOM
–20 to +10% of V
NOM
±0.02% of
V
OUT
range/°C
No minimum load
+10%
See ordering guide
10,000μF
4700μF
10,000μF
10,000μF
4700μF
–20 to +10% of V
NOM
–20 to +10% of V
NOM
1mA
1 mA
OUTPUT
Voltage Output Range
Voltage Output Accuracy
(50% load)
Adjustment Range
Temperature Coefficient
Minimum Loading
Remote Sense Compensation
Ripple/noise (20MHz bandwidth)
Line/Load Regulation
Efficiency
Maximum Capacitive Loading
Low ESR, resistive load
Isolation Voltage
Input to Output
Input fo baseplate
Baseplate to output
Isolation resistance
Isolation capacitance
Isolation safety rating
Current limit inception
(98% of V
OUT
, after warmup)
Short Circuit Protection Method
Short Circuit Current
Short Circuit Duration
Overvoltage Protection
via magnetic feedback
2000 VDC min.
1500 VDC min.
1500 VDC min.
100M
1500 pF
30 Amps
2250 VDC min.
1500 VDC min.
500 VDC min.
100M
1000 pF
29 Amps
2000 VDC min.
1500 VDC min.
750 VDC min.
100M
1000 pF
Basic insulation
20.5 Amps
2250 VDC min.
1500 VDC min.
1500 VDC min.
100M
1500pF
27 Amps
2250 VDC min.
1500 VDC min.
750 VDC min.
100M
1000 pF
9.5 Amps
5 Amps
4 Volts
Current limiting, hiccup autorestart. Remove overload for recovery.
5 Amps
3 Amps
0.5 Amps
Continuous, output shorted to ground (no damage)
3.96 Volts max.
6 Volts
6 Volts
0.5 Amps
14.4 Volts
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MDC_UQQ.D03
Page 3 of 18
UQQ Series
Wide Input Range Single Output DC-DC Converters
FUNCTIONAL SPECIFICATIONS (CONTINUED)
UQQ-12/8-Q48
UQQ-15/7-Q12
See ordering guide
9.0 Volts (18)
8.0 Volts
38.5 Volts
50mAp-p
See ordering guide
0.1A
2
sec
250mA
250mA
12.9 Amps
30mA
L-C
External Fusing
Required (15)
UQQ-24/4-Q12
INPUT
Input Voltage Range
Start-up Threshold
Undervoltage Shutdown
Overvoltage Shutdown
Reflected (back) ripple current
(2)
Input Current
Full load conditions
Inrush transient
Output short circuit
No load
Low line (V
IN
= min.)
Standby mode
(Off, UV, OT shutdown)
Internal Input Filter Type
Reverse Polarity Protection
Remote On/Off Control
(5)
Positive logic (“P” suffix)
Negative logic (“N” suffix)
On/Off Current
17.5 Volts
16.0 Volts
None
15mAp-p
9.0 Volts (18)
8.0 Volts
None
50mAp-p
Absolute Maximum Ratings
Input Voltage
Continuous
Transient (100msec)
On/Off Control
Output Overvoltage
Output Current
(7)
12V models
0 to +36V
+50V
48V models
0 to +75V
+100V
0V min to +15V max.
VOUT +20% max.
Current-limited. Devices can
withstand sustained short circuit
without damage.
–55 to +125°C
See soldering guidelines
Input Reverse Polarity Protection
Install external fuse.
100mA
70mA
5.93A
30mA
PI-type
External Fusing
Required (15)
250mA
120mA
10.73 Amps
5mA
L-C
External Fusing
Required (15)
Storage Temperature
Lead Temperature
Absolute maximums 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 Specifications Table is not implied or recommended.
OFF = Ground pin to +0.8V max. ON = open or +3.5-15V max.
OFF = open or +5 to +V
IN
max. ON = Ground pin to +0.8V max. (16)
1 mA
See ordering guide
±1.25% of V
NOM
–20 to +10% of V
NOM
±1% of V
NOM
–20 to +10% of V
NOM
±0.02% of
V
OUT
range/°C
+10% of Vout max.
No minimum loading
+10% of Vout max.
See ordering guide
2200μF
4700μF
1500μF max
+10% of Vout max.
±1% of V
NOM
±10% of V
NOM
OUTPUT
Voltage Output Range
Voltage Output Accuracy
(50% load)
Adjustment Range
Temperature Coefficient
Minimum Loading
Remote Sense Compensation
Ripple/noise (20MHz bandwidth)
Line/Load Regulation
Efficiency
Maximum Capacitive Loading
Low ESR <0.02Ωmax., resistive load
Isolation Voltage
Input to Output
Input fo baseplate
Baseplate to Output
Isolation resistance
Isolation capacitance
Isolation safety rating
Current limit inception
(98% of V
OUT
, after warmup)
Short Circuit Protection Method
Short Circuit Current
Short Circuit Duration
Overvoltage Protection
via magnetic feedback
15 Volts
2250 VDC min.
1500 VDC min.
500 VDC min.
100M
1000 pF
11.5 Amps
2000 VDC min.
1500 VDC min.
1500 VDC min.
100M
1000 pF
Basic insulation
9.5 Amps
2000 VDC min.
1500 VDC min.
1500 VDC min.
100M
1000 pF
5.75 Amps
Current limiting, hiccup autorestart. Remove overload for recovery
0.1 Amps
0.5 Amps
0.5 Amps
Continuous, output shorted to ground (no damage)
18 Volts
29 Volts
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MDC_UQQ.D03
Page 4 of 18
UQQ Series
Wide Input Range Single Output DC-DC Converters
FUNCTIONAL SPECIFICATIONS (CONTINUED)
UQQ-3.3/25-Q12 UQQ-3.3/25-Q48 UQQ-5/17-Q12
UQQ-5/20-Q48
UQQ-12/8-Q12
UQQ-12/8-Q48
UQQ-15/7-Q12
UQQ-24/4-Q12
DYNAMIC CHARACTERISTICS
Dynamic Load Response
(50-75-50% load step)
Start-up Time
VIN to VOUT regulated
Remote On/Off
to VOUT regulated
Switching frequency
10msec
5msec
255 ±25kHz
10msec max
5msec max
255 ±25kHz
260 ±25kHz
225-265kHz
260 ±25kHz
10msec
25msec
10msec
20msec
5msec
245 ±20kHz
260 ±25kHz
260 ±25kHz
10msec
10msec
50μsec to ±1%
of final value
100μsec to ±1%
of final value
50μsec to ±1%
of final value
95μsec to ±1%
of final value
50μsec to ±1%
of final value
50μsec to ±2%
of final value
ENVIRONMENTAL
Calculated MTBF
(4)
Operating Temperature Range
See Derating curves
Operating Temperature Range
with baseplate
(no Derating required) (3)(14)
Storage Temperature Range
Thermal Protection/Shutdown
Relative humidity
–40 to +105ºC
–40 to +100ºC
TBC
–40 to +85ºC
with Derating
–40 to +105°C
–40 to +105ºC
–40 to +105°C
3,360,928
–40 to +57ºC
with Derating
–40 to +100°C
TBC
–40 to +85ºC
with Derating
–40 to +105°C
–40 to +105°C
–55 to +125ºC
+120ºC, measured at thermistor T1
To +85°C/85% non-condensing
PHYSICAL
Outline dimensions
Baseplate material
Pin material
Pin diameter
Weight
Electromagnetic interference
(conducted, external filter
required)
Safety
Flammability
Specification Notes:
(1) All models are tested and specified with 300 lfm airflow, external 1 and 10μF paralleled ceramic/
tantalum output capacitors and a 100μF external input capacitor. All capacitors are low ESR
types. These capacitors are necessary to accommodate our test equipment and may not be
required in your applications. All models are stable and regulate within spec under no-load
conditions.
General conditions for Specifications are +25°C, V
IN
= nominal, V
OUT
= nominal, full load unless
noted.
(2) Input Ripple Current is tested and specified over a 5Hz to 20MHz bandwidth. Input filtering is
C
IN
= 33μF tantalum, C
BUS
= 220μF electrolytic, L
BUS
= 12μH.
(3) Note that Maximum Power Derating curves indicate an average current at nominal input voltage.
At higher temperatures and/or lower airflow, the DC-DC converter will tolerate brief full current
outputs if the total RMS current over time does not exceed the Derating curve. All Derating
curves are presented at sea level altitude. Be aware of reduced power dissipation with increas-
ing altitude.
(4) Mean Time Before Failure is calculated using the Telcordia (Belcore) SR-332 Method 1, Case 3,
ground fixed conditions, T
PCBOARD
= +25°C, full output load, natural air convection.
(5) The On/Off Control may be driven with external logic or by applying appropriate external voltages
which are referenced to Input Common. The On/Off Control Input should use either an open
collector/open drain transistor or logic gate.
(6) Short circuit shutdown begins when the output voltage degrades approximately 2% from the
selected setting.
(7) The outputs are not intended to sink appreciable reverse current.
See mechanical specifications
Aluminum
Copper alloy
0.04/0.062 inches, 1.016/1.524 mm
1 ounce (28 grams)
Designed to meet class B, EN55022, CISPR22
Certified to UL/cUL 60950-1, CSA-C22.2 No.60950-1, IEC/EN 60950-1, 2nd Edition
UL 94V-0
(8) Output noise may be further reduced by adding an external filter. See I/O Filtering and Noise
Reduction.
(9) All models are fully operational and meet published specifications, including “cold start” at –40°C.
On-board component package temperatures must not exceed +128°C.
(10) Regulation specifications describe the deviation as the line input voltage or output load current is
varied from a nominal midpoint value to either extreme.
(11) Alternate pin length and/or other output voltages are available under special quantity order.
(12) Overvoltage shutdown on 48V input models can be eliminated under special quantity order. OV
shutdown can be deleted in order to comply with certain telecom reliability requirements. These
requirements attempt continued operation despite significant input overvoltage.
(13) Do not exceed maximum power specifications when adjusting the output trim.
(14) Note that the converter may operate up to +105°C with the baseplate installed (+100°C for the
UQQ-3.3/25-Q48). However, thermal self-protection occurs near +120°C Therefore, +105°C is
recommended to avoid thermal shutdown.
(15) If reverse polarity is accidentally applied to the input, to ensure reverse input protection, always
connect an external input fuse in series with the +V
IN
input. Use approximately twice the full
input current rating with nominal input voltage.
(16) For On/Off Control on negative-polarity UQQ-3.3/25-Q48N models, the maximum OFF mode
control voltage is +13.5 Volts. For the ON mode, the range is pin grounded to +1 Volt max.
(17)
Always
connect the sense pins. If they are not connected to a remote load, connect each sense
pin to its respective output at the converter pins.
(18) Shown at Vin = 10V; after module starts up it operates from 9-36Vdc.
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MDC_UQQ.D03
Page 5 of 18
