Datasheet UNR-3.3-12-D5 Datasheet (DATEL)

Low cost!

+4.75V to +5.5V input

+3.3V (±33mV), 12 Amp output

200kHz, synchronous-rectifier topology

High efficiency, 90%

Low output noise, 40mVp-p

Quick transient response, 30µsec

–40 to +50°C operation with no derating

Highly reliable, 100% SMT construction

Remote on/off control

Output short-circuit protection

1" x 2" metal package; EMC compliant

IEC950/EN60950/UL1950 pending

Modifications and customs for OEM’s

DATEL, Inc., Mansfield, MA 02048 (USA) • Tel: [phone] Fax: [phone] • Email: [e-mail] • Internet: www.datel.com

Single Output

UNR Series

Features

Figure 1. Simplified Schematic

Non-Isolated, 5V-to-3.3V

12 Amp, DC/DC Converters

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INNOVATION and EX C ELL E N C

E

®

®

As 3.3V CPU’s, DSP’s and PLD’s proliferate and low-voltage currents increase,
the shortcomings of both traditional centralized power architectures and the
recently introduced 3.3V outputs on AC/DC converters become more apparent. The
solution is to locally derive 3.3V power from buses of higher voltage (5V, 12V, 48V,
etc.). "Point-of-use" power processing is the only way to guarantee the tight
accuracy, low noise, and quick transient response required by these new devices.

If you are designing power-hungry 3.3V partitions or boards, consider DATEL’s
new UNR-3.3/12-D5. These non-isolated, 5V-to-3.3V DC/DC’s deliver up to 12
Amps. Packaged in 1" x 2" x 0.44" metal cases, these converters use synchronous
rectification, planar magnetics, and 100% automatic SMT assembly to bring you the
most cost-effective 3.3V power.

The 90% efficient UNR-3.3/12-D5 delivers its full 40W output power from
–40 to +50°C without heat sinking or forced-air cooling. It is fully line (±0.1% max.)
and load (±0.5% max.) regulated and features a TTL-compatible on/off control.
These devices can withstand a sustained output short circuit and automatically
recover to rated accuracy.

Designing your own 3.3V step-down buck regulator may be practical for low­power applications. When you need 12 Amps, the task becomes significantly more
challenging and time consuming. It’s time to consider the high efficiency, ease-of­use, and overall cost effectiveness of DATEL's UNR Series. Safety agency approv­als and full EMI characterizations are currently in progress.

+V

IN

+V

OUT

INPUT

RETURN

ON/OFF

C

ONTROL

OUTPUT
RETURN

CURRENT LIMITING
& S.C. SHUTDOWN

LOGIC

GROUND

PWM

CONTROLLER

REFERENCE &

ERROR AMP

Signals applied to the On/Off Control are referenced to Logic Ground
which is internally connected to Input/Output Return. The Logic Ground
pin is not designed to carry heavy current. Do not install units with the
Return pins open or connected via high-impedance runs.

UNR Series

NON-ISOLATED, 40W, SINGLE OUTPUT DC/DC CONVERTERS

DATEL makes no representation that the use of its products in the circuits described herein, or the use of other technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein
do not imply the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifications are subject to change without notice. The DATEL logo is a registered DATEL, Inc. trademark.

DATEL (UK) LTD. Tadley, England Tel: [phone]
DATEL S.A.R.L. Montigny Le Bretonneux, France Tel: [phone]
DATEL GmbH München, Germany Tel: [phone]
DATEL KK Tokyo, Japan Tel: [phone], Osaka Tel: [phone]

DATEL, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151
Tel: [phone] [phone] Fax: [phone]
Internet: www.datel.com Email: [e-mail]
Data Sheet Fax Back: [phone]

DS-0430A 6/99

ORDERING INFORMATION

I/O Connections

Pin Function P9

1 Logic Ground
2 On/Off Control
3 +Output
4 Output Return
5 Input Return
6 +Input

Note:

The case is connected to
pin 5 (Input Return).

INNOVATION and EX C ELL E N C

E

®

®

ISO 9001

I

SO 9001



MECHANICAL SPECIFICATIONS

Performance/Functional Specifications

Ty pi c a l @ T A = +25°C under nominal line voltage and full-load conditions, unless noted.

➀ ➁

➀

These devices have no minimum load requirements and will regulate under no-load conditions.

➁

Achieving specified performance requires the installation of an external 470µF input capacitor
with an ESR of 20m

Ω

and an rms ripple current rating of 6 Amps, as well as an external 22µF

output capacitor with an ESR of 200m

Ω

or less.

➂

No-load/full-load conditions. When the unit is off, the input "standby" current is typically 10mA.

➃

See On/Off Control Functionality.

➄

Output noise may be reduced by installing additional external capacitors across the output
terminals. Caps should be selected for low ESR (typically 60m

Ω

) and located as close to the

unit as possible.

➅

Current limiting initiates at approximately 30% above rated load. Under short-circuit conditions,
output current folds back to approximately 1A and remains there until the short is removed.

Input

Input Voltage Range 4.75-5.5 Volts (5V nominal)

Input Current

➂

0.15/8.8 Amps

Input Filter Type Capacitive

Overvoltage Protection None

Reverse-Polarity Protection None

On/Off Control (Pin 2)

➃

TTL high (or open) = on, low = off

Output

VOUT Accuracy (50% load) ±1% (±33mV) maximum

Temperature Coefficient ±0.02% per °C

Ripple/Noise (20MHz BW)

➄

40mVp-p typical, 80mVp-p maximum

Line/Load Regulation ±0.1% maximum/±0.5% maximum

Efficiency 90% typical, 87% minimum

Current Limiting

➅

Auto-recovery

Dynamic Characteristics

Transient Response (50% load step) 30µsec to ±1% of final value

Switching Frequency 200kHz (±20kHz)

Environmental

Operating Temperature (Ambient):

Without Derating –40 to +50°C
With Derating to +100°C (Straight line to 0 Watts)

Storage Temperature –40 to +105°C

Physical

Dimensions 2" x 1" x 0.44" (51 x 25 x 11.2mm)

Shielding 5-sided

Case Connection Pin 5 (Input Return)

Case Material Corrosion resistant steel with

non-conductive, epoxy-based, black
enamel finish and plastic baseplate

Pin Material Brass, solder coated

Weight 1.6 ounces (45.4 grams)

The On/Off Control pin has an internal 5kΩ pull-up resistor to +VIN. It can
be driven with any logic circuit capable of meeting the following drive require­ments. Logic "0" = 0 to +0.8V. Logic "1" = +2.0V to +VIN. IIH (@VIN = +2.0V) =
–0.7mA. I

IL (@VIN = 0V) = –1.1mA. Open collector logic or a single NPN drive

transistor can be used. The drive circuit should be rated for more than 5.5V.
Applying a voltage to pin 2 when no input power is applied to the converter can
cause permanent damage to the converter.

On/Off Control Functionality

Input Voltage 7 Volts

Output Current Current limited. Devices can

withstand a sustained output short
circuit without damage.

Storage Temperature –40 to +105°C

Lead Temperature (soldering, 10 sec.) +300°C

These are stress ratings. Exposure of devices to any of these conditions may adversely
affect long-term reliability. Proper operation under conditions other than those listed in the
Performance/Functional Specifications Table is not implied.

Absolute Maximum Ratings

0.10

(2.54)

0.800

(

20.32)

0.300
(7.62)

1.800

(45.72)

0.200
(5.08)

1.00

(25.40)

BOTTOM VIEW

1

2

3

4

6

0.10

(2.54)

5

0.400

(10.16)

METAL CASE

INSULATED BAS

E

2.00

(50.80)

0.44

(11.18)

0.20 MIN
(5.08)

PINS 1-2: 0.040 ±0.002 DIA. (1.016 ±0.051)
PINS 3-6: 0.062 ±0.002 DIA. (1.575 ±0.051

)

Case C5B

UNR-3.3/12-D5 Non-Isolated, 5V-to-3.3V, 40 Watt, DC/DC Converter

INNOVATION and EX C ELL E N C

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®

®

DATEL, Inc., Mansfield, MA, USA • Tel: [phone] • Fax: [phone] • Email: [e-mail]

Data sheet fax back: [phone]

• •

• •

•

Visit us on the internet: www.datel.com

3

12 (6-16.5) 2 x 0.4 x 0.8 ➃B1, P18 ±1.0% ±3.0% 50 92%

➅

UNS-5/3-D12 UNS, 10/15W

12 (6-16.5) 2 x 0.8 x 0.4 ➄B2, P18 ±1.0% ±3.0% 50 92%

➅

UNS-5/3-D12D UNS, 10/15W

5 ➆

12 (10.4-13.6) 2 x 1 x 0.48 C13, P21 ±0.25% ±0.5% 60 87% UNR-5/5-D12 UNR, 25W

Listed specifications are typical at TA = +25°C under nominal line voltage and full-load conditions, unless noted.

➀

See individual product data sheets for mechanical specifications and pinouts.

➁

Ripple/Noise is specified over a 20MHz bandwidth.

➂

Listed specifications for these products are preliminary.

➃

10-pin SIP package.

➄

10-pin DIP package.

➅

Listed specification is a typical.

➆

Output voltage is user adjustable from 3.3 to 6V.

➇

Output voltage is user adjustable from 1.4 to 3.6V.

➈

Industry-standard, 11-pin SIP package.

N

ON-ISOLATED

DC/DC C

ONVERTER SELECTION

G

UIDE

N

ON-ISOLATED

DC/DC C

ONVERTER SELECTION

G

UIDE

Output Input Voltage, Ripple /

Current Nominal (Range) Dimensions Case, Line Load Noise

➁➁

➁➁

➁

Efficiency DATEL Data Sheet @

(Amps, Max.) (Volts) (Inches) Pinout (Max.) (Max.) (mVp-p) (Min.) Model Number www.datel.com

Package

➀➀

➀➀

➀

Regulation

2.5V

SINGLE OUTPUT, NON-ISOLATED

2.5V

SINGLE OUTPUT, NON-ISOLATED

Rev. C 6/99

5V

SINGLE OUTPUT, NON-ISOLATED

5V

SINGLE OUTPUT, NON-ISOLATED

2

5 (4.75-5.5) 1 x 1 x 0.45 C7A, P9 ±0.25% ±0.5% 30 83% UNR-2.5/2-D5 UNR, 5W

8

5 (4.75-5.5) 2 x 1 x 0.39 C5A, P9 ±0.1% ±0.5% 40 86% UNR-2.5/8-D5 UNR, 20/25W

12 (10.4-13.6) 2 x 1 x 0.48 C5C, P9 ±0.1% ±0.6% 40 85% UNR-2.5/8-D12 UNR, 20/25W

10

5 (4.75-5.5) 2 x 1 x 0.39 C5A, P9 ±0.1% ±0.5% 40 85% UNR-2.5/10-D5 UNR, 20/25W

12 (10.4-13.6) 2 x 1 x 0.48 C5C, P9 ±0.1% ±0.6% 40 83% UNR-2.5/10-D12 UNR, 20/25W

12

5 (4.75-5.5) 2 x 1 x 0.44 C5B, P9 ±0.1% ±0.5% 40 84% UNR-2.5/12-D5 UNR, 30W

20

5 (4.5-5.5) 2 x 2 x 0.49 C21, P26 ±0.1% ±1.0% 60 85% UNR-2.5/20-D5

➂

Contact DATEL

5 (4.75-5.5) 1 x 1 x 0.45 C7A, P9 ±0.4% ±0.5% 30 86% UNR-3.3/3-D5 UNR, 10W

3

7.5 (4.75-13.6) 2 x 0.4 x 0.8 ➃B1, P18 ±1.0% ±3.0% 50 90%

➅

UNS-3.3/3-D5 UNS, 10/15W

7.5 (4.75-13.6) 2 x 0.8 x 0.4 ➄B2, P18 ±1.0% ±3.0% 50 90%

➅

UNS-3.3/3-D5D UNS, 10/15W

12 (10.4-13.6) 1 x 1 x 0.45 C7A, P9 ±0.25% ±0.5% 100 87% UNR-3.3/3-D12 UNR, 10W

5 (4.75-5.5) 2 x 1 x 0.39 C5A, P9 ±0.1% ±0.5% 40 88% UNR-3.3/8-D5 UNR, 26/33W

5 (4.75-5.5) 2 x 1 x 0.39 C16A, P23 ±0.1% ±0.5% 40 88% UNR-3.3/8-D5T

➂ ➇

Contact DATEL

8

5 (4.75-5.5) 2 x 0.4 x 0.53 ➈B3, P27 ±0.1% ±0.5% 40 88% USN-3.3/8-D5

➂

Contact DATEL
12 (10.4-13.6) 2 x 1 x 0.48 C5C, P9 ±0.1% ±0.6% 60 86% UNR-3.3/8-D12 UNR, 26/33W

12 (10.4-13.6) 2 x 1 x 0.48 C16C, P23 ±0.1% ±0.6% 60 86% UNR-3.3/8-D12T

➂ ➇

Contact DATEL

5 (4.75-5.5) 2 x 1 x 0.39 C5A, P9 ±0.1% ±0.5% 40 86% UNR-3.3/10-D5 UNR, 26/33W

5 (4.75-5.5) 2 x 1 x 0.39 C16A, P23 ±0.1% ±0.5% 40 86% UNR-3.3/10-D5T

➂ ➇

Contact DATEL

10

5 (4.75-5.5) 2 x 0.4 x 0.53 ➈B3, P27 ±0.1% ±0.5% 40 86% USN-3.3/10-D5

➂

Contact DATEL
12 (10.4-13.6) 2 x 1 x 0.48 C5C, P9 ±0.1% ±0.6% 60 85% UNR-3.3/10-D12 UNR, 26/33W

12 (10.4-13.6) 2 x 1 x 0.48 C16C, P23 ±0.1% ±0.6% 60 85% UNR-3.3/10-D12T

➂ ➇

Contact DATEL

12

5 (4.75-5.5) 2 x 1 x 0.44 C5B, P9 ±0.1% ±0.5% 40 87% UNR-3.3/12-D5 UNR, 40W

20

5 (4.5-5.5) 2 x 2 x 0.49 C21, P26 ±0.1% ±1.0% 50 87% UNR-3.3/20-D5

➂

Contact DATEL

3.3V

SINGLE OUTPUT, NON-ISOLATED

3.3V

SINGLE OUTPUT, NON-ISOLATED