unr-1.8/10-d3t Murata Manufacturing Co., Ltd, unr-1.8/10-d3t Datasheet

unr-1.8/10-d3t

Manufacturer Part Number

unr-1.8/10-d3t

Description

Single Output, Non-isolated, 3.3vin To 1.5/1.8/2.5vout 8 And 10 Amp Dc/dc Converters

Manufacturer

Murata Manufacturing Co., Ltd

Datasheet

1.UNR-1.810-D3T.pdf (8 pages)

Current page: 1 of 8
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Features

3.0-3.6V input range; Non-isolated

1.5V, 1.8V or 2.5V output @ 10A

2" x 1" through-hole or SMT package

Gull-wing leads for SMT package

Full synchronous-rectiﬁer topology

300kHz switching; Planar magnetics

High efﬁciency, to 89%

Low noise, 80mVp-p

Quick transient response, 25μsec

–40 to +50/55°C ambient operation with

no derating

Remote on/off control; Output

overcurrent detection

IEC950/EN60950/UL1950 pending

EMC compliant

OUT

www.murata-ps.com/rohs

user-trimmable from 1.28V to 3V

For full details go to

CONTROL

GROUND

RETURN

ON/OFF

LOGIC

INPUT

VOLTAGE

BOOST

current from your 3.3V system, don’t pay to derive more isolated power from your

intermediate dc bus. Murata Power Solutions’ new, 3.3V-input, UNR "D3" models

derive 10 Amps

of low-voltage current right from your 3.3V supply. These non-isolated power

converters exploit full synchronous rectiﬁcation, planar magnetics, and 100% auto-

mated assembly to deliver high efﬁciencies (to 89%), low noise (typically 80mVp-p),

and low costs. Housed in 1" x 2" shielded metal cases, UNR D3’s offer standard

through-hole ("T" models) or SMT ("SM" models) packaging.

plastic baseplates) weigh less than 40 grams and can withstand peak lead tem-

peratures up to +300°C.

regulated. They feature quick transient response (25μsec), user-optional on/off

control (for power sequencing), and output overcurrent detection and shutdown

("hiccup" technique with auto-recovery). 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.

If your DSP and CPLD core logic are demanding more 1.5V, 1.8V or 2.5V

The new "gull-wing" SMT packages (with metal shells and non-conductive

These versatile DC/DC’s are fully line (±0.1% max.) and load (±0.5% max.)

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

CONTROLLER

Figure 1. Simpliﬁed Schematic

PWM

Single Output, Non-Isolated, 3.3V

OVERCURRENT

DETECTION

REFERENCE &

ERROR AMP

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

8 and 10 Amp DC/DC Converters

UNR D3 SERIES

Typical topology is shown.

OUTPUT

RETURN

TRIM

MDC_UNR15-25W Page 1 of 8

OUT

to 1.5/1.8/2.5V

+1 508 339 3000

OUT

Related parts for unr-1.8/10-d3t

unr-1.8/10-d3t Summary of contents

Page 1

... Housed in 1" x 2" shielded metal cases, UNR D3’s offer standard through-hole ("T" models) or SMT ("SM" models) packaging. ...

... Performance Speciﬁcations and Ordering Guide V I OUT OUT Root Model (Volts) (Amps) UNR-1.5/10-D3T 1.5 10 UNR-1.5/10-D3SM 1.5 10 UNR-1.8/10-D3T 1.8 10 UNR-1.8/10-D3SM 1.8 10 UNR-2.5/10-D3T 2.5 10 UNR-2.5/10-D3SM 2.5 10 Typical +25°C under nominal line voltage and full-load conditions, unless otherwise A noted. All models are tested and speciﬁed with an external 470μF input capacitor with a 20m ESR and a 6Arms ripple-current rating, as well as a 22μ ...

Page 3

... Return pins should never be left open or connected via high-impedance paths). I/O Filtering and Noise Reduction All UNR 15-25W 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 D3 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

... Watts +50°C OUT (ambient) and similarly derate linearly to +100°C. When operated with 3.0V input voltages, all devices in the UNR D3 Series are more efﬁcient and can operate to +60°C and +55°C, respectively. At 3.6V , devices operate less efﬁciently, and maximum full-load ambient IN temperatures are reduced to +45° ...

Page 6

... Recommended PC Board Layout If necessary, a single pc board layout can accommodate both through-hole and SMT models of the UNR D3 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

... Start-Up Time OUT UNR-2.5/10-D3 Models (V = 3.3V CONTROL 1V/div V OUT 1V/div UNR D3 SERIES to 1.5/1.8/2. and 10 Amp DC/DC Converters = 10A, 22μF output capacitor.) OUT 4msec/div = 10A, 22μF output capacitor.) OUT 4msec/div Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000 MDC_UNR15-25W Page OUT ...

Page 8

... Tokyo, Tel: 3-3779-1031, email: sales_tokyo@murata-ps.com Osaka, Tel: 6-6354-2025, email: sales_osaka@murata-ps.com Website: www.murata-ps.jp Shanghai, Tel: +86 215 027 3678, email: shanghai@murata-ps.com Guangzhou, Tel: +86 208 221 8066, email: guangzhou@murata-ps.com Technical enquiries email: sales@murata-ps.com, tel: MDC_UNR15-25W Page OUT = 10A) OUT 8 9 ...

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