UNR-1.8-10-D5 Murata Manufacturing Co., Ltd, UNR-1.8-10-D5 Datasheet

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UNR-1.8-10-D5

Manufacturer Part Number
UNR-1.8-10-D5
Description
Non-isolated, 1.8/2.5/3.3vout 8 And 10 Amp Dc/dc Converters
Manufacturer
Murata Manufacturing Co., Ltd
Datasheet
Not Recommended
For New Designs
Contact DATEL
DATEL, Inc., Mansfi eld, MA 02048 (USA) • Tel: (508)339-3000, (800)233-2765 Fax: (508)339-6356 • Email: sales@datel.com • Internet: www.datel.com
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 package
High effi ciency to 91%; Low noise
200kHz switching frequency
–40 to +40/50/60°C ambient operation with
no derating
Remote on/off control; Output overcurrent
detection
IEC950/EN60950/UL1950 approval
CONTROL
GROUND
RETURN
ON/OFF
LOGIC
INPUT
+V
IN
VOLTAGE
BOOST
+V
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
provides a complete line of non-isolated DC/DC converters to satisfy this require-
ment. With input voltages of 5V (-D5 models) and 12V (-D12 models) these convert-
ers offer standard output voltages of 1.8, 2.5 and 3.3 Volts and up to 10 Amps of
output current in through-hole 1" x 2" metal cases.
full synchronous rectifi cation, and 100% automated assembly to deliver high effi -
ciencies (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-
recovery). Their impressive guaranteed effi ciencies enable them to deliver fully rated
output power from +40/50/60°C (ambient) without supplemental cooling.
tors impractical, take a look at one of DATEL’s switching buck regulators. Their
high effi ciency, ease-of-use, long-term reliability, and overall cost effectiveness will
impress you. Safety agency approvals and EMC characterizations are currently in
progress.
CC
CONTROLLER
As supply voltages trend lower and load currents increase, centralized power
With on/off control as a standard feature, these non-isolated converters exploit
These versatile DC/DC’s are fully line and load regulated. They feature quick
If your high current requirements have made the use of ineffi cient linear regula-
Figure 1. Simplifi ed Schematic
PWM
8 and 10 Amp DC/DC Converters
OVERCURRENT
DETECTION
Non-Isolated, 1.8/2.5/3.3V
REFERENCE &
ERROR AMP
Single Output
➀ -D5 models only.
®
INNOVATION and EX C ELL E N C E
UNR Series
+V
OUTPUT
RETURN
OUT
OUT
®

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UNR-1.8-10-D5 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 provides a complete line of non-isolated DC/DC converters to satisfy this require- ment ...

Page 2

... UNR Series Performance Specifi cations and Ordering Guide V I OUT OUT Model (Volts) (Amps) UNR-1.8/10-D5 1.8 10 UNR-2.5/8-D5 2.5 8 UNR-2.5/10-D5 2.5 10 UNR-3.3/8-D5 3.3 8 UNR-3.3/10-D5 3.3 10 UNR-2.5/8-D12 2.5 8 UNR-2.5/10-D12 2.5 10 UNR-3.3/8-D12 3.3 8 UNR-3.3/10-D12 3.3 10 ➀ Typical +25°C under nominal line voltage and full-load conditions, unless A otherwise noted. All models are tested and specifi ed with an external 22μF output capacitor with a 200mΩ ...

Page 3

... Return pins should never be left open or connected via high-impedance paths). I/O Filtering and Noise Reduction All models in the UNR 18-33W Series converters are tested and specifi ed with external 470μF input capacitors (20mΩ ESR, 6Arms ripple-current rating) and external 22μF output capacitors (200mΩ ESR). In critical applica- tions, input/output ripple/noise may be further reduced by installing additional I/O caps ...

Page 4

... Contact our Applications Engineering Group for additional details. Input Overvoltage and Reverse-Polarity Protection UNR 18-33W Series DC/DC converters do not incorporate either input over- voltage or input reverse-polarity protection. Input voltages in excess of the listed absolute maximum ratings and input polarity reversals of longer than " ...

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