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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)
50μsec to ±1%
of ?nal value
100μsec to ±1%
of ?nal value
50μsec to ±1%
of ?nal value
95μsec to ±1%
of ?nal value
50μsec to ±1%
of ?nal value
50μsec to ±2%
of ?nal value
Start-up Time
VIN to VOUT regulated
10msec
10msec max
10msec
25msec
10msec
20msec
10msec
10msec
Remote On/Off
5msec
5msec max
5msec
to VOUT regulated
Switching frequency
255 ±25kHz
255 ±25kHz
260 ±25kHz
225-265kHz
260 ±25kHz
245 ±20kHz
260 ±25kHz
260 ±25kHz
ENVIRONMENTAL
Calculated MTBF (4)
Operating Temperature Range
See Derating curves
TBC
–40 to +85oC
with Derating
3,360,928
–40 to +57oC
with Derating
TBC
–40 to +85oC
with Derating
Operating Temperature Range
–40 to +105oC
–40 to +100oC
–40 to +105°C
–40 to +105oC
–40 to +105°C
–40 to +100°C
–40 to +105°C
–40 to +105°C
with baseplate
(no Derating required) (3)(14)
Storage Temperature Range
Thermal Protection/Shutdown
Relative humidity
PHYSICAL
Outline dimensions
Baseplate material
Pin material
Pin diameter
Weight
Electromagnetic interference
(conducted, external ?lter
required)
Safety
Flammability
Speci?cation Notes:
–55 to +125oC
+120oC, measured at thermistor T1
To +85°C/85% non-condensing
See mechanical speci?cations
Aluminum
Copper alloy
0.04/0.062 inches, 1.016/1.524 mm
1 ounce (28 grams)
Designed to meet class B, EN55022, CISPR22
Certi?ed 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 ?lter. See I/O Filtering and Noise
(1) All models are tested and speci?ed with 300 lfm air?ow, 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 Speci?cations are +25°C, V IN = nominal, V OUT = nominal, full load unless
noted.
(2) Input Ripple Current is tested and speci?ed over a 5Hz to 20MHz bandwidth. Input ?ltering 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 air?ow, 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 ?xed 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.
Reduction.
(9) All models are fully operational and meet published speci?cations, including “cold start” at –40°C.
On-board component package temperatures must not exceed +128 ° C.
(10) Regulation speci?cations 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 signi?cant input overvoltage.
(13) Do not exceed maximum power speci?cations 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.
www.murata-ps.com/support
MDC_UQQ.D03 Page 5 of 18
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制造商:Murata Power Solutions 功能描述:DC/DC Converter
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功能描述:DC/DC转换器 12Vin 5Vout 17A pos polarity TH RoHS:否 制造商:Murata 产品: 输出功率: 输入电压范围:3.6 V to 5.5 V 输入电压（标称）: 输出端数量:1 输出电压（通道 1）:3.3 V 输出电流（通道 1）:600 mA 输出电压（通道 2）: 输出电流（通道 2）: 安装风格:SMD/SMT 封装 / 箱体尺寸:
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功能描述:DC/DC转换器 48Vin 5Vout 20A neg TH baseplate RoHS:否 制造商:Murata 产品: 输出功率: 输入电压范围:3.6 V to 5.5 V 输入电压（标称）: 输出端数量:1 输出电压（通道 1）:3.3 V 输出电流（通道 1）:600 mA 输出电压（通道 2）: 输出电流（通道 2）: 安装风格:SMD/SMT 封装 / 箱体尺寸:
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功能描述:DC/DC转换器 48Vin 5Vout 20A neg polarity TH
RoHS:否 制造商:Murata 产品: 输出功率: 输入电压范围:3.6 V to 5.5 V 输入电压（标称）: 输出端数量:1 输出电压（通道 1）:3.3 V 输出电流（通道 1）:600 mA 输出电压（通道 2）: 输出电流（通道 2）: 安装风格:SMD/SMT 封装 / 箱体尺寸:
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功能描述:DC/DC转换器 48Vin 5Vout 20A pos TH baseplate RoHS:否 制造商:Murata 产品: 输出功率: 输入电压范围:3.6 V to 5.5 V 输入电压（标称）: 输出端数量:1 输出电压（通道 1）:3.3 V 输出电流（通道 1）:600 mA 输出电压（通道 2）: 输出电流（通道 2）: 安装风格:SMD/SMT 封装 / 箱体尺寸:
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