UNR-1.8/2-D5 Datel, Inc., UNR-1.8/2-D5 Datasheet

UNR-1.8/2-D5

Manufacturer Part Number

UNR-1.8/2-D5

Description

DC/DC Power Converters

Manufacturer

Datel, Inc.

Datasheet

1.UNR-1.82-D5.pdf (7 pages)

Available stocks

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Company:

Bonase Electronics (HK) Co., Limited

Part Number:

UNR-1.8/2-D5

Manufacturer:

DATEL

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134

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Bonase Electronics (HK) Co., Limited

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UNR-1.8/2-D5-C

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LEM

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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

Low cost! High reliability!

1" x 1" SMT or through-hole packages

Gull-wing leads; Standard reﬂ ow

Complete; No external components

Outputs: 1.8V/2A, 2.5V/2A, 3.3V/3A

Inputs: 4.75-5.5V, 10.8-13.6V

Guaranteed efﬁ ciencies to 87%

Output noise as low as 40mVp-p

Transient response as quick as 20µsec

–40 to +70°C operation with no derating

On/off control; EMC compliant

IEC950/EN60950/UL1950 approvals

Modiﬁ cations and customs for OEM's

CONTROL

GROUND

RETURN

ON/OFF

LOGIC

INPUT

UNDERVOLTAGE

SHUTDOWN

➀

CONTROLLER

2.5V (2A), 5V-to-3.3V (3A), and 12V-to-3.3V (3A) DC/DC converters in miniature,

1" x 1" surface-mount and through-hole packages. The "gull-wing" SMT packages

(with metal shells and non-conductive plastic baseplates) weigh a mere 17 grams

and can withstand lead temperatures up to +230°C. They are compatible with

virtually all contemporary pick-and-place and solder-reﬂ ow processes.

every low-voltage, high-current CPLD, ASIC, DSP, etc. has its own "power plant"

right next to it. With isolated DC/DC converters inevitably residing at the edges of

boards in proximity with backplanes and power buses, the "on-board" proliferation

of distributed power will continue with more cost-effective, non-isolated devices. The

low-cost, easy-to-use (no external components required), highly reliable (100% fully

automated SMT construction) 3.6-10W UNR Series makes this power processing at

the concluding point of use a practical reality today.

optional on/off control (for power-sequencing requirements), output current limiting,

and short-circuit protection (foldback technique with auto-recovery). Additionally, the

12V-to-3.3V models offer input undervoltage lockout (at 9.6V). Their impressive

guaranteed efﬁ ciencies enable all models to deliver their fully rated output power

from –40 to +65/70°C (ambient) without heat sinking or forced-air cooling.

linear regulators, take a look at one of these new switching buck regulators. Their

high efﬁ ciency, ease-of-use, long-term reliability, and overall cost effectiveness will

impress you. Safety agency approvals are currently in progress.

PWM

DATEL's 3.6-10W UNR Series consists of non-isolated, 5V-to-1.8V (2A), 5V-to-

The true beneﬁ ts of distributed power will ultimately be realized only when

These versatile DC/DC's are fully line and load regulated. They feature user-

If you've already considered and rejected the use of inefﬁ cient, step-down,

Figure 1. Simpliﬁ ed Schematic

➁

CURRENT LIMITING

& S.C. SHUTDOWN

REFERENCE &

ERROR AMP

Non-Isolated, 1.8/2.5/3.3V

3.6-10W DC/DC Converters

➀ "D5" models do not have input undervoltage shutdown.

➁ "D5" models employ a more traditional buck-regulator design

Single Output

in which this FET is replaced with a power Schottky diode.

INNOVATION and EX C ELL E N C E

OUTPUT

RETURN

UNR Series

OUT

Related parts for UNR-1.8/2-D5

UNR-1.8/2-D5 Summary of contents

Page 1

... The low-cost, easy-to-use (no external components required), highly reliable (100% fully automated SMT construction) 3.6-10W UNR Series makes this power processing at the concluding point of use a practical reality today. These versatile DC/DC's are fully line and load regulated. They feature user- optional on/off control (for power-sequencing requirements), output current limiting, and short-circuit protection (foldback technique with auto-recovery) ...

Page 2

... A noted. The UNR-1.8/2-D5 and D5SM models require an external 15kΩ pull-up resistor between +Input and On/Off Control for normal operation. See On/Off Control for details. ➁ Ripple/Noise (R/N) measured over a 20MHz bandwidth. The UNR-3.3/3-D12 and D12SM models are speciﬁ ...

Page 3

... The UNR-1.8/2-D5 and D5SM require an external 15Ω pull-up resistor between +Input and On/Off Control for normal operation. See On/Off Control for details. The UNR-3.3/3-D12 and D12SM are speciﬁ ...

Page 4

... For DATEL UNR Series 3.6-10 Watt DC/DC Converters, you should use slow-blow type fuses with values no greater than the following. Model Number UNR-1.8/2-D5/-D5SM UNR-2.5/2-D5/-D5SM UNR-3.3/3-D5/-D5SM UNR-3.3/3-D12/-D12SM Start-Up Threshold and Undervoltage Shutdown (UNR-3 ...

Page 5

... CONTROL LOGIC GROUND Figure 2. Driving the On/Off Control Pin Internal Pull-Up Model Resistor (R ) Resistor (R IP UNR-1.8/2-D5/-D5SM 1kΩ UNR-2.5/2-D5/-D5SM 1kΩ UNR-3.3/3-D5/-D5SM 1kΩ UNR-3.3/3-D12/-D12SM 10kΩ Solder Reﬂ ow For UNR 3.6-10W Series surface-mount devices, the packages' gull-wing leads are made of tin-plated (150 microinches) copper. The gull-wing conﬁ gu- ration, as opposed to " ...

Page 6

... UNR Series Efﬁ ciency vs. Output Current and Input Voltage UNR-1.8/2-D5/-D5SM (Guaranteed efficiency = 77 and 4. 5. 0.5 0.8 1.1 1.4 +1.8V Output Current (Amps) UNR-2.5/2-D5/-D5SM (Guaranteed efficiency = 83 and 5. 0.5 0.8 1.1 1.4 +2.5V Output Current (Amps UNR-3.3/3-D5/-D5SM = 2A) (Guaranteed efficiency = 86 OUT ...

Page 7

... EMI Radiated Emissions If you’re designing with EMC in mind, please note that all of DATEL’s 3.6-10 Watt UNR Series 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. Radiated emissions are tested to the limits of FCC Part 15, Class B and CISPR 22 (EN 55022), Class B. Correlation to other speciﬁ ...

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