unr-1.5 C&D Technologies., unr-1.5 Datasheet

unr-1.5

Manufacturer Part Number

unr-1.5

Description

8 And 10 Amp Dc/dc Converters

Manufacturer

C&D Technologies.

Datasheet

1.UNR-1.5.pdf (8 pages)

Current page: 1 of 8
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www.murata-ps.com

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-1.5

unr-1.5 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. ...

... Case C16A2 2 Pinout P23 BOTTOM VIEW DIMENSIONS IN INCHES (MM UNR-2.5/10- UNR-1.8/10-D3 16 UNR-1.5/10- – Ambient Temperature ( See Temperature Derating section in Technical Notes for more details www.murata-ps.com Single Output, Non-Isolated, 3.3V ➀ ...

Page 3

... Volts (3.3V nominal) ➈ Input Current: Normal Operating Conditions See Ordering Guide Standby/Off Mode 3.6mA typical, 8mA maximum Output Short Circuited ➁ ➅ 500mA typical, 700mA maximum Input Ripple Current: UNR-1.5/10-D3, UNR-1.8/10-D3 150mAp-p UNR-2.5/10-D3 50mAp-p Input Filter Type Capacitive Overvoltage Protection None Reverse-Polarity Protection None On/Off Control ➂ ...

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

... UNR-1.5/10-D3 Models (Guaranteed efficiency = Load Current (Amps) UNR-1.8/10-D3 Models (Guaranteed efficiency = 82 3.6V IN ...

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