unr-3.3-3000-d5 Murata Manufacturing Co., Ltd, unr-3.3-3000-d5 Datasheet

unr-3.3-3000-d5

Manufacturer Part Number

unr-3.3-3000-d5

Description

Single Output, Non-isolated, 3.3v 8-40 Watt, Dc/dc Converters

Manufacturer

Murata Manufacturing Co., Ltd

Datasheet

1.UNR-3.3-3000-D5.pdf (6 pages)

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Features

Low cost

5V or 12V inputs

3.3V±1% (±33mV) outputs

±0.25% (±8mV) max. line regulation

±0.5% (±17mV) max. load regulation

Guaranteed efﬁciencies to 86%

Power densities to 29W/in

High output current ... small packages:

No heat sinks required

–40 to +100

On/off/sync control

UL, CSA, IEC safety approvals

Customized V

3A (1" x 1" package)

8A (2" x 1" package)

12A (2" x 2" package)

www.murata-ps.com/rohs

For full details go to

C operating temperatures

OUT

(Contact DATEL)

CONTROL

GROUND

RETURN

ON/OFF

LOGIC

INPUT

from centralized to distributed power processing in modern telecommunication

and computer systems. Powering these new chips requires local, on-board power

converters that rapidly source large amounts of current while maintaining accurate

voltages with minimal ripple and noise. The distribution losses, unpredictable regula-

tion and poor transient response of traditional centralized power systems are no

longer acceptable. Power processing at the "point-of-use" is frequently the only way

to achieve desired performance.

DC/DC converters were speciﬁcally designed for on-board usage in today’s mixed-

logic 5V/3.3V systems. They also support those systems that are already drawing

maximum current from their 5V buses and must resort to their 12V buses.

of delivering full rated output currents (2.5-12 Amps) while maintaining low case

temperatures without the need for heat sinks or any auxiliary cooling. UNR Series

devices combine proven circuit architectures, contemporary SMT-on-ceramic and

SMT-on-pcb assembly techniques, and a new thermally-conductive potting com-

pound to achieve high output power in the smallest packages possible.

sharing with output current/voltage-sensing capabilities. We can also quickly modify

existing devices for application-speciﬁc output voltages from 1.8 to 5 Volts. Please

need.

ate from wide-range input voltages from 4.6 to 72V.

www.murata-ps.com

New low-voltage microprocessor and memory chips are driving the migration

DATEL’s new UNR Series of non-isolated, 3.3V output, 5V or 12V input, switching

These low-cost, extremely efﬁcient (typically 90%) power converters are capable

DATEL is currently developing UNR Series devices that incorporate active load

DATEL also makes a complete line of isolated 3.3V DC/DC converters that oper-

CONTROLLER

PWM

Figure 1. Simpliﬁed Schematic

REFERENCE &

ERROR AMP

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

Single Output, Non-Isolated, 3.3V

8-40 Watt, DC/DC Converters

OUTPUT

RETURN

OUT

MDC_UNR8-40W.B01 Page 1 of 6

UNR Series

+1 508 339 3000

Related parts for unr-3.3-3000-d5

unr-3.3-3000-d5 Summary of contents

Page 1

... These low-cost, extremely efﬁcient (typically 90%) power converters are capable of delivering full rated output currents (2.5-12 Amps) while maintaining low case temperatures without the need for heat sinks or any auxiliary cooling. UNR Series devices combine proven circuit architectures, contemporary SMT-on-ceramic and SMT-on-pcb assembly techniques, and a new thermally-conductive potting com- pound to achieve high output power in the smallest packages possible ...

Page 2

... Watt, DC/DC Converters Input I V Nom. Range IN Efﬁciency IN (mA, Max.) (Volts) (Volts) (Min.) 5 4.75-5.5 25/2390 85% 12 10.8-13.2 35/856 82% 5 4.75-5.5 25/6330 86% 5 4.75-5.5 50/9700 84% Case C5 Case C6 Technical enquiries email: sales@murata-ps.com, tel: MDC_UNR8-40W.B01 Page Package (Case, Pinout) C7, P9 C7, P10 C5 508 339 3000 ...

Page 3

... Single Output, Non-Isolated, 3.3V 8-40 Watt, DC/DC Converters 7 Volts 15 Volts Current must be <10A. Brief duration. Fusing recommended. None Current limited. Max. current and short-circuit duration model dependent. –55 to +105°C +300°C Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000 MDC_UNR8-40W.B01 Page ...

Page 4

... Technical Notes Input Capacitors As shown in the simpliﬁed schematic, UNR Series power converters do not have internal input capacitors. Users must install external input capacitors for the devices to achieve speciﬁed operation. The input capacitor functions as a true energy-storage element. Its required capacitance varies as a function of applied line voltage. Additionally, as the power converter’ ...

Page 5

... Reducing Output Ripple/Noise In addition to their internal output capacitors, UNR Series DC/DC convert- ers require the installation of external output capacitors to achieve their published ripple/noise speciﬁcations. The selected caps should be low-ESR, tantalum or electrolytic types, and they should be located as close to the converters as possible. Recommended values are listed in the table below. ...

Page 6

... Contact us. Our goal is to provide you the highest-quality, most cost-effec- tive power converters available. EMI Radiated Emissions If you’re designing with EMC in mind, please note that all of DATEL’s UNR 8-40 Watt DC/DC Converters have been characterized for radiated and conducted emissions in our new EMI/EMC laboratory. Testing is conducted in an EMCO 5305 GTEM test cell utilizing EMCO automated EMC test software ...

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