UNR-3.3/8-D5T-C Murata Power Solutions Inc, UNR-3.3/8-D5T-C Datasheet

UNR-3.3/8-D5T-C

Manufacturer Part Number

UNR-3.3/8-D5T-C

Description

DC/DC TH 8A 5-3.3V Non-Iso

Manufacturer

Murata Power Solutions Inc

Series

UNRr

Datasheet

1.UNR-3.38-D12-C.pdf (10 pages)

Specifications of UNR-3.3/8-D5T-C

Product

Non-Isolated / POL

Output Power

26 W

Input Voltage Range

4.75 V to 5.5 V

Number Of Outputs

Output Voltage (channel 1)

3.3 V

Output Current (channel 1)

8 A

Lead Free Status / Rohs Status

Lead free / RoHS Compliant

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

UNR-3.3/8-D5T-C

Manufacturer:

DATEL

Quantity:

334

Company:

Meier Automation Equipment Co., Limited

Part Number:

UNR-3.3/8-D5T-C

Manufacturer:

MURATA/村田

Quantity:

20 000

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Download datasheet (238Kb)

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Features

Input ranges of 4.75-5.5V or 10.8-13.6V

Output voltages of 1.8/2.5/3.3V

8 and 10 Amp output current models

Non-isolated, full synchronous topology

1" x 2" through-hole or SMT package

Gull-wing leads for SMT package

High efﬁciency to 91%; Low noise

200kHz switching; Planar magnetics

–40 to +40/50/60°C ambient operation with

no derating

Remote on/off control; Output overcurrent

detection

IEC950/EN60950/UL1950 approval

OUT

www.murata-ps.com/rohs

user-trimmable from 1.28V to 3.6V

For full details go to

CONTROL

GROUND

RETURN

ON/OFF

LOGIC

INPUT

VOLTAGE

BOOST

becomes more impractical. The tight accuracy, low noise and quick transient

response demanded by today's low voltage CPU's, ASIC's and DSP's make power

processing at the point of use the only viable solution. The UNR 18-33W series pro-

vides a complete line of non-isolated DC/DC converters to satisfy this requirement.

With input voltages of 5V (-D5 models) and 12V (-D12 models) these converters

offer standard output voltages of 1.8, 2.5 and 3.3 Volts and up to 10 Amps of output

current in both through-hole and surface-mount 1" x 2" metal cases.

non-isolated converters exploit full synchronous rectiﬁcation, planar magnetics, and

100% automated assembly to deliver high efﬁciencies (to 91%) and low noise at low

cost.

transient response (50μsec), user-optional on/off control (for power sequencing),

and output overcurrent detection and shutdown ("hiccup" technique with auto-recov-

ery). Their impressive guaranteed efﬁciencies enable them to deliver fully rated

output power from –40 to +50/55°C (ambient) without supplemental cooling.

tors impractical, take a look at one of Murata Power Solutions’ new switching buck

regulators. Their high efﬁciency, ease-of-use, long-term reliability, and overall cost

effectiveness will impress you. Safety agency approvals and EMC characterizations

are currently in progress.

CONTROLLER

As supply voltages trend lower and load currents increase, centralized power

With on/off control and output voltage trim capability as standard features, these

These versatile DC/DC’s are fully line and load regulated. They feature quick

If your high current requirements have made the use of inefﬁcient linear regula-

Figure 1. Simpliﬁed Schematic

PWM

Single Output, Non-Isolated, 5 or 12V

OVERCURRENT

DETECTION

REFERENCE &

ERROR AMP

Technical enquiries email: sales@murata-ps.com, tel:

UNR D5/D12 Series

-D5 models only.

8 and 10 Amp DC/DC Converters

Typical topology is shown.

OUTPUT

RETURN

TRIM

OUT

UNR18-33W.B01 Page 1 of 10

OUT

to 1.8/2.5/3.3V

+1 508 339 3000

OUT

Related parts for UNR-3.3/8-D5T-C

UNR-3.3/8-D5T-C Summary of contents

Page 1

... The tight accuracy, low noise and quick transient response demanded by today's low voltage CPU's, ASIC's and DSP's make power processing at the point of use the only viable solution. The UNR 18-33W series pro- vides a complete line of non-isolated DC/DC converters to satisfy this requirement. ...

Page 2

... TOP VIEW (2.54) 2.00 0.110 (50.80) (2.79) 0.060 (1.52) INSULATED BASE 0.015 METAL CASE (0.38) DIMENSIONS ARE IN INCHES (MM) Technical enquiries email: sales@murata-ps.com, tel: UNR18-33W.B01 Page OUT Package (Case, Typ. Pinout) 86% C16A2, P23 86% C18, P25 89% C16A2, P23 89% C18, P25 92% C16A1, P23 ...

Page 3

... Return pins should never be left open or connected via high-impedance paths). I/O Filtering and Noise Reduction All UNR 18-33W Series converters are tested and speciﬁed with external 470μF input capacitors (20m ESR, 6Arms ripple-current rating) and external 22μF output capacitors (200m ESR). External input capacitance is ...

Page 4

... On/Off Control The On/Off Control pin may be used for remote on/off operation. UNR 18- 33W Series DC/DC converters are designed so that they are enabled when the control pin is pulled high or left open (normal mode) and disabled when the control pin is pulled low (to less than +0 ...

Page 5

... V O 9.47 –1. – 2.5 O 7.5(V – 1.27) O –1 DOWN 3.3 – 9.5 –1 – 3.3 O 7.5(V – 1.26 –1.0 T DOWN 3.3 – 9.41 –1 – 3 desired output voltage. O Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000 UNR18-33W.B01 Page OUT –1.74 ...

Page 6

... Recommended PC Board Layout If necessary, a single pc board layout can accommodate both through-hole and SMT models of the UNR 18-33W Series. Note that on page 2 of this data sheet, the through-hole package is drawn with a bottom view of its pin locations, and the surface-mount package is drawn with of top view of its pin locations ...

Page 7

... On/Off Control to V Start-Up Time OUT D12 Models, Start-up from Enable (Full load, using specified output capacitor.) ENABLE 5V/div V OUT 1V/div UNR D5/D12 Series to 1.8/2.5/3. and 10 Amp DC/DC Converters IN 10msec/div 10msec/div Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000 UNR18-33W.B01 Page OUT ...

Page 8

... UNR-3.3/8-D12T/D12SM Output Power vs. Ambient Temperature, No Air Flow 100 –40 ˚ C) UNR-3.3/10-D5T/D5SM Output Power vs. Ambient Temperature, No Air Flow – 100 ˚ C) UNR-3.3/10-D12T/D12SM Output Power vs. Ambient Temperature, No Air Flow – 100 ˚ C) UNR D5/D12 Series to 1.8/2.5/3. and 10 Amp DC/DC Converters Ambient Temperature ( C) ˚ 0 ...

Page 9

... Load Current (Amps) www.murata-ps.com Single Output, Non-Isolated 12V UNR-3.3/8-D5T/D5SM Efficiency vs. Line/Load UNR-3.3/8-D12T/D12SM Efficiency vs. Line/Load UNR D5/D12 Series to 1.8/2.5/3. and 10 Amp DC/DC Converters V = 4.75V 5. Load Current (Amps 10. 12V 13. Load Current (Amps) Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000 UNR18-33W.B01 Page OUT 8 8 ...

Page 10

... China: Shanghai, Tel: +86 215 027 3678, email: shanghai@murata-ps.com Guangzhou, Tel: +86 208 221 8066, email: guangzhou@murata-ps.com © 2008 Murata Power Solutions, Inc. 04/09/08 UNR D5/D12 Series to 1.8/2.5/3. and 10 Amp DC/DC Converters Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000 UNR18-33W.B01 Page OUT ...

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