Datasheet UNR-2.5-2-D5 Datasheet (DATEL)

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-2.5V

2 Amp, DC/DC Converters

As supply voltages trend lower, centralized power systems become more
impractical. The accuracy , regulation and quick transient response demanded by
today’s low-voltage, high-current CPU’s, DSP’s and ASIC’s make power
processing at the "point of use" the only viable solution.

For your emerging 2.5V applications, DATEL’s new UNR-2.5/2-D5 is a true
power-processing "component" that conveniently fits anywhere you need up to
5 Watts of low-noise (30mVp-p), rapidly responding (30µsec step response),

2.5V power. Its miniature 1" x 1" plastic package (UL94V-0 rated) requires
absolutely no external filtering and can be "plugged in" right beside its load.

The impressively efficient (85%) UNR-2.5/2-D5 delivers its full rated 5W
output power over the –40 to +70°C ambient temperature range without heat
sinking or forced-air cooling. Devices are fully line (±0.25% max.) and load
(±0.5% max.) regulated and feature user-optional remote on/off control. Units
are able to withstand a sustained output short circuit and automatically recover
to rated accuracy when the short is removed.

Because true low-voltage DC/DC’s are not yet widely available, you’re no
doubt considering building your own or compromising with an inefficient, step­down, linear regulator. It’s time to take a look at one of DATEL’s "switchers." Their
high efficiency, ease-of-use, and overall cost effectiveness will impress you.
Safety agency approvals and full EMI characterizations are currently in progress.
Contact DA TEL for the latest results.

Low cost! Complete!
No external I/O capacitors required
+4.75V to +5.5V input
+2.5V (±1.5%), 2 Amp output
Low output noise, 30mVp-p
Quick transient response, 30µsec
200kHz switching frequency; 85% efficient
1" x 1" x 0.45", plug-in package
Highly reliable, 100% SMT construction
–40 to +70°C operation with no derating
On/off control; EMC compliant
IEC950/EN60950/UL1950 pending
Modifications and customs for OEM’s

■

n

n

n

n

n

n

n

n

n

n

n

n

+V

IN

+V

OUT

PWM

CONTROLLER

REFERENCE &

ERROR AMP

INPUT

RETURN

LOGIC

GROUND

ON/OFF

CONTROL

OUTPUT
RETURN

CURRENT LIMITING
& S.C. SHUTDOWN

INNOVATION and EX C ELL E N C E

®

®

UNR Series

NON-ISOLATED, 5W, SINGLE OUTPUT DC/DC CONVERTERS

Input Voltage 7 Volts
Input Reverse-Polarity Protection None
Output Overvoltage Protection None
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 T able is not implied.

Absolute Maximum Ratings

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-0414A 6/99

Return Current Paths

The Input Return (pin 5), Output Return (pin 4) and Logic Ground (pin 1) are
all connected to each other internal to the device. To the extent possible, all
load current should be returned through pin 4 (via low-impedance runs) and
all input current returned through pin 5. Any control signals applied to pin 2
should be referenced to pin 1. The internal trace leading to pin 1 is not
designed to carry high currents. Devices should never be installed in a
manner that results in high current flow through pin 1 (i.e., pins 4 and 5
should never be left open or attached via high-impedance connections).

MECHANICAL SPECIFICATIONS

I/O Connections

Pin Function P9

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

ORDERING INFORMATION

UNR-2.5/2-D5 Non-Isolated, 5V-to-2.5V, 5 Watt, DC/DC Converter

INNOVATION and EX C ELL E N C

E

®

®

Performance/Functional Specifications

Typical @ TA = +25°C under nominal line voltage and full-load conditions,
with no external I/O filtering, unless noted.

➀

➀

These power converters require a minimum 15% loading to maintain specified regulation.
Operation under no-load conditions will not damage these devices; however they may not
meet all listed specifications.

➁

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

➂

The On/Off Control pin 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 +5.0V. I

IH (@VIN = +5V) =

+2mA. I

IL (@VIN = 0V) = –5mA. Open-collector logic or a single NPN drive transistor can be

used. Applying a voltage to pin 2 when no input power is applied to the converter can cause
permanent damage to the converter.

➃

In critical applications, output noise may be further reduced by installing external capacitors
across the output terminals. The caps should be located as close to the unit as possible and
must be selected for low ESR (typically less than 60m

W

).

➄

Current limiting initiates at approximately 30% above rated load. Under short-circuit conditions,
output current folds back to approximately 150mA and remains there until the short is removed.

Input

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

➁

40/1180mA

Input Filter Type Capacitive
Overvoltage Protection None
Reverse-Polarity Protection None
On/Off Control (Pin 2)

➂

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

Output

VOUT Accuracy (50% load) ±1.5% (±37.5mV) maximum
Temperature Coefficient ±0.02% per °C
Ripple/Noise (20MHz BW)

➃

30mVp-p typical, 50mVp-p maximum

Line/Load Regulation ±0.25% maximum/±0.5% maximum
Efficiency 85% typical, 83% minimum
Current Limiting

➄

Auto-recovery

Dynamic Characteristics

Transient Response (50% load step) 30µsec to ±1% of final value
Switching Frequency 200kHz (±30kHz)

Environmental

Operating Temperature (Ambient):

Without Derating –40 to +70°C
With Derating to +100°C (Straight line to 0 Watts)

Storage Temperature –40 to +105°C

Physical

Dimensions 1" x 1" x 0.45" (25 x 25 x 11.4mm)
Shielding None
Case Material Diallyl phthalate, UL94V-0 rated
Pin Material Brass, solder coated
Weight 0.6 ounces (17 grams)

0.040 ±0.002 DIA.
(1.016 ±0.051)

1.00

(25.40)

0.45

(11.43)

0.20 MIN.
(5.08)

0.200

(5.08)

0.10

(2.54)

BOTTOM VIEW

3

1.00

(25.40)

0.800

(20.32)

0.100
(2.54)

1
2

4

6

0.800

(20.32)

0.200
(5.08)

0.400

(10.16)

5

0.10

(2.54)

STANDOFFS

0.020
(0.51)

PLASTIC CASE WITH AN INSULATED BASE

Case C7A

ISO-9001 REGISTERED

INNOVATIO N and EX C ELL E N C E

® ®

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 ➃ B1, 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 ➄ B2, 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.

NON-ISOLATED DC/DC CONVERTER SELECTION GUIDE

NON-ISOLATED DC/DC CONVERTER SELECTION GUIDE

Output Input Voltage, Ripple/

Current Nominal (Range) Dimensions Case, Line Load Noise ➁ Efficiency DATEL Data Sheet @

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

Package 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 ➃ B1, 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 ➄ B2, 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 ➈ B3, 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 ➈ B3, 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