unr-3.3/3-d12 C&D Technologies., unr-3.3/3-d12 Datasheet

unr-3.3/3-d12

Manufacturer Part Number

unr-3.3/3-d12

Description

Single Output, Non-isolated, 1.8/2.5/3.3vo U T 3.6-10w Dc/dc Converters

Manufacturer

C&D Technologies.

Datasheet

1.UNR-3.33-D12.pdf (7 pages)

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

unr-3.3/3-d12SM-C

Manufacturer:

MURATA/村田

Quantity:

20 000

Current page: 1 of 7
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Typical topology is shown.



Features

Low cost! High reliability!

1" x 1" SMT or through-hole packages

Gull-wing leads; Standard reflow

Complete; No external components

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

Inputs: 4.75-5.5V, 10.8-13.6V

Guaranteed efficiencies 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

Modifications and customs for OEM's

www.murata-ps.com/rohs

For full details go to

CONTROL

GROUND

RETURN

ON/OFF

LOGIC

INPUT

UNDERVOLTAGE

SHUTDOWN

➀

www.murata-ps.com

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 virtu-

ally all contemporary pick-and-place and solder-reflow 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 pro-

cessing 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 efficiencies 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 efficiency, ease-of-use, long-term reliability, and overall cost effectiveness will

impress you. Safety agency approvals are currently in progress.

Single Output, Non-Isolated, 1.8/2.5/3.3V

PWM

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

The true benefits 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 inefficient, step-down,

Figure 1. Simplified Schematic

➁

CURRENT LIMITING

& S.C. SHUTDOWN

REFERENCE &

ERROR AMP

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

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

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

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

out

3.6-10W DC/DC Converters

OUTPUT

RETURN

OUT

UNR Series

MDC_UNR 3.6-10W_B01

+1 508 339 3000

Page 1 of 7

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unr-3.3/3-d12 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 pro- cessing 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

... 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 specified with an external 22µF input capacitor. All other models are specified with no external I/O capacitors ...

Page 3

... See Startup Threshold and Undervoltage Shutdown for details. ➂ See On/Off Control for details. ➃ The 22µF external input capacitor required for the UNR-3.3/3-D12 and D12SM should be minimally rated for 1.5Arms ripple current and 125mΩ ESR. Output noise for all models can be further reduced with the installation of external output capacitors ...

Page 4

... All D5 models of UNR 3.6-10W Series DC/DC converters achieve their rated ripple and noise specifications without the use of external input/output capacitors. The UNR-3.3/3-D12 and D12SM models are tested and specified with a single, external 22µF input capacitor (minimally rated for 1.5Arms ripple current and 120mΩ ESR). ...

Page 5

... 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 Single Output, Non-Isolated, 1.8/2.5/3.3V SMT Solder Process for SM models CAUTION — Avoid Reflow Ovens For the surface-mount "SM" models of the UNR Series, the packages’ gull- wing leads are made of tin-plated (150 microinches) copper. The gull-wing configuration, as opposed to “ ...

Page 6

... Output Current (Amps) Single Output, Non-Isolated, 1.8/2.5/3.3V UNR-3.3/3-D5/-D5SM = 2A) (Guaranteed efficiency = 86 OUT 0.5 1.4 1.7 2 UNR-3.3/3-D12/-D12SM = 2A) (Guaranteed efficiency = 87 OUT 4.75V 1.4 1.7 2 0.5 www.murata-ps.com UNR Series 3.6-10W DC/DC Converters out = 5V and I ...

Page 7

... Class B and CISPR 22 (EN 55022), Class B. Correlation to other specifica- tions can be supplied upon request. Radiated emissions plots to FCC and CISPR 22 for model UNR-3.3/3-D5SM appear below. Published EMC test reports are available for each model number. Contact MPS's Applications Engineering Department for more details. ...

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