UNR-2.5/15-D5 Murata Power Solutions Inc, UNR-2.5/15-D5 Datasheet - Page 3

• Manufacturer Part Number: UNR-2.5/15-D5
• Description: DC/DC Converters & Regulators 37.5W 5V to 2.5V 15A
• Manufacturer: Murata Power Solutions Inc
• Series: UNRr

Specifications of UNR-2.5/15-D5

• Product: Non-Isolated / POL
• Output Power: 38 W
• Input Voltage Range: 4.75 V to 5.5 V
• Input Voltage (nominal): 5 V
• Number Of Outputs: 1
• Output Voltage (channel 1): 2.5 V
• Output Current (channel 1): 15 A
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

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Performance/Functional Specifications
Typical @ T
Input Voltage Range
Input Current:
On/Off Control (Pin 6)
Efficiency
Overcurrent Protection:
Start-Up Time:
Switching Frequency
Input Ripple Current:
Input Filter Type
Overvoltage Protection
Reverse-Polarity Protection
V
V
Minimum Loading
Temperature Coefficient
Ripple/Noise (20MHz BW)
Line/Load Regulation
Transient Response (50 to 75% step)
Operating Temperature (Ambient):
Storage Temperature
Dimensions
Shielding
Attached Heatsink
Circuit Board
Pin Material
Weight
Flammability
OUT
OUT
Normal Operating Conditions
Standby/Off Mode
UNR-1.5/20-D5, UNR-1.8/20-D5
UNR-2.5/15-D5
UNR-2.5/20-D5
UNR-3.3/15-D5
UNR-3.3/20-D5
Trim pin tied to +Output
Trim pin tied to Output Return
V
On/Off to V
Without Derating
Technique
15 Amp Models
20 Amp Models
Average Output Current
With Derating
IN
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Trim Range (3.3V
to V
Accuracy (50% load)
A
= +25°C under nominal line voltage and full-load conditions unless noted.
For full details go to
OUT
OUT
OUT
models):
Dynamic Characteristics
Environmental
Physical
Input
Output
4.75 to 5.5 Volts (5V nominal)
See Ordering Guide
TBD
260mAp-p
150mAp-p
140mAp-p
100mAp-p
150mAp-p
Capacitive (74μF)
None
None
±1% maximum
V
V
No load
±0.02% per °C
See Ordering Guide
See Ordering Guide
See Ordering Guide
50μsec to ±2% of final value
30msec
30msec
200kHz (±20kHz)
–40 to +35-65°C
to +100°C (See Derating Curves)
–40 to +105°C
2" x 2" x 0.49" (51 x 51 x 12.45mm)
Open-frame
Black anodized aluminum
Single-layer conductors on aluminum base
RoHS: Gold plate over copper alloy
Non-RoHS: Tin over copper alloy
1.7 ounces (48.2 grams)
UL 94V-0
On = open or +4V to +V
Off = +0.4V to 1V; I
"Hiccup" with auto-recovery
146 to 173% (160% typical)
115 to 130% (120% typical)
1 Amp typical, 3 Amps maximum
OUT
OUT
= <1.53 Volts
= >3.6 Volts
IN
= TBD
IN
; I
IN
= TBD
Return Current Paths
These are non-isolated DC/DC converters. The Input Return and Output
Return pins are connected to each other internally. To the extent possible,
all input and load currents should be returned through the Input Return and
Output Return, respectively (via low-impedance runs). Any control signals
applied to the On/Off Control pin should be referenced to Input/Output
Return.
I/O Filtering and Noise Reduction
All models in the UNR 30-66W Series are tested and specified with an
external 22μF output capacitor (200m ESR) and a 4000μF input capacitor
with a 9.75Arms ripple-current rating. External input capacitance is required
and must be rated to handle the input ripple current as follows:
(The large value of the input capacitor is due mainly to output characteristics
of DATEL's outgoing ATE test system. Ripple current rating is an important
consideration for the end user.) In critical applications, input/output ripple/
noise may be further reduced by installing additional I/O caps.
External input capacitors serve primarily as energy-storage elements. They
should be selected for bulk capacitance (at appropriate frequencies), low
ESR, and high rms-ripple-current ratings. The switching nature of modern
DC/DC converters requires that dc input voltage sources have low ac
impedance, and highly inductive source impedances can affect system
stability. Your specific system configuration may necessitate additional
considerations.
Output ripple/noise (also referred to as periodic and random deviations or
PARD) can be reduced below specified limits using filtering techniques, the
simplest of which is the installation of additional external output capacitors.
Output capacitors function as true filter elements and should be selected for
bulk capacitance, low ESR, and appropriate frequency response. Any scope
measurements of PARD should be made directly at the DC/DC output pins
with scope probe ground less than 0.5" in length.
Input Voltage:
Input Reverse-Polarity Protection
Input/Output Overvoltage Protection
Output Current
Storage Temperature
Lead Temperature (Soldering, 10 sec.)
These are stress ratings. Exposure of devices to 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.
T E C H N I C A L N O T E S
All models are tested and specified with a 22μF output capacitor with a 200m ESR and a
4000μF input capacitor with 9.75Arms ripple-current rating and 20m ESR. See I/O Filtering
and Noise Reduction for more details. These devices have no minimum-load requirements
and will regulate under no-load conditions.
See Output Overcurrent Detection for details.
See On/Off Control for details.
See Output Voltage Trimming for details.
See Start-Up Time for details.
See Temperature Derating for details.
Continuous
Transient (100msec)
I
RMS
UNR Open-Frame Series
= I
Technical enquiries email: [e-mail], tel:
Single Output, Non-Isolated, 15-20 Amp
OUT
Absolute Maximum Ratings
5V
V
V
IN,
OUT
IN
1.5-3.3V
(
5 Volts
7 Volts
None
None
Current limited. Devices can
withstand a sustained output
short circuit without damage.
–40 to +105°C
+300°C
1 –
V
V
OUT
IN
OUT
)
DC/DC Converters
UNR30-66W.B01 Page 3 of 8
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