DATEL UNS-5-3-D12D, UNS-5-3-D12, UNS-3.3-3-D5D Datasheet

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

Single Output

UNS Series

Features

Figure 1. Simplified Schematic

+V

IN

+V

OUT

PWM

CONTROLLER

REFERENCE &

ERROR AMP

ON/OFF

CONTROL

TRIM

+V

IN

–V

IN

–V

IN

+V

OUT

OUTPUT
RETURN

OUTPUT
RETURN

Non-Isolated, 3.3V and 5V
3 Amp, DC/DC Converters

Low cost, high efficiency, wide input voltage range and low output noise define
DATEL’s new UNS Series of non-isolated, step-down, switching DC/DC converters.
The 3.3V- and 5V-output devices are, respectively, 90% and 92% efficient. All
models are fully line and load regulated and maintain specified accuracy over the
impressively wide input voltage ranges of 4.75 to 13.6 Volts for 3.3V outputs and 6
to 16.5 Volts for 5V outputs. Output ripple and noise are typically 50mVp-p.

UNS devices are fabricated using proven SMT-on-pcb construction techniques.
The 3.3V and 5V devices are both available in either lightweight SIP (2" x 0.4" x

0.8") or DIP (2" x 0.8" x 0.4", 600 mil spacing between rows) package configura­tions. The DIP option is designated by a "D" suffix added to the part number. All
models are conformally coated for protection against moisture and dust.

The high efficiency of the UNS Series’ fixed-frequency (190kHz) switching
design eliminates the need for thermally conductive potting compound. Devices are
specified for full-power operation up to ambient temperatures of +50°C. With
derating, they operate up to +70°C. Calculated MTBF (MIL-HDBK-217F) is more
than 1.6 million hours.

These simple-to-use power converters have no minimum load requirements.
They draw 1mA when unloaded and a mere 100µA in the standby mode (On/Off
Control turned off). 3.3V models have an output voltage adjustment range of 2.7 to

3.3 Volts. 5V models are adjustable down to 3.0V.

INNOVATION and EX C ELL E N C E

®

®

■

n

n

n

n

n

n

n

n

n

n

n

Low cost
SIP or DIP packaging

3.3V (10W) or 5V (15W) outputs
Wide range inputs:

4.75-13.6V for 3.3V models
6-16.5V for 5V models

High efficiencies, typically 90-92%
Low output noise, 50mVp-p
Remote on/off control
100µA "standby" input current
Output current limiting
EMC compliant
Highly reliable, 100% SMT construction
Conformally coated for harsh

environments

UNS Series

NON-ISOLATED, 10 and 15W, SINGLE OUTPUT DC/DC CONVERTERS

2

Case B1 (SIP)

PART NUMBER STRUCTURE

MECHANICAL SPECIFICATIONS

0.900

(22.86)

1.97

(50.00)

0.400

(10.16)

0.81

(20.50)

0.03
(0.8)

0.1

(2.5

)

0.28
(7.0)

0.07

(1.85)

12345 678910

4 EQ. SP. @

0.100 (2.54)

0.400

(10.16)

4 EQ. SP. @

0.100 (2.54)

0.13

(3.41)

0.30

(7.62)

0.025

(0.64)

Case B2 (DIP)

0.900

(22.86)

1.97

(50.00)

0.400

(10.16)

0.81

(20.50)

0.03
(0.8)

0.14
(3.5)

0.28
(7.0)

12345 678910

4 EQ. SP. @

0.100 (2.54)

0.400

(10.16)

4 EQ. SP. @

0.100 (2.54)

0.13

(3.41)

0.40

(10.16)

0.025

(0.64)

0.60

(15.24)

0.10

(2.63)

**

* NO CONNECTION. FOR MECHANICAL STABILITY ONLY.

STANDOFF

Input Voltage Range:

D5 = 4.75-13.6 Volts (7.5V nominal)
D12 = 6-16.5 Volts (12V nominal)

Nominal Output Voltage:

3.3 or 5 Volts Maximum Output Current
in Amps

Non-Isolated

SIP packaging

Output Configuration:

U = Unipolar

Add "D" suffix for optional
DIP package configuration

3.3U NS 3 D5 D-

/

-

I/O Connections

Pin

6
7
8
9

10

Function P18

Trim
Output Rtn.
Output Rtn.

+Output
+Output

Function P18

+Input
+Input

–Input
–Input

On/Off Control

Pin

1
2
3
4
5

TEMPERATURE DERATING

Output Power (Watts)

Ambient Temperature (°C)

20

18

16

14

12

10

8

6

4

2

0

–10 0 10 20 30 40 50 60 70 80 90 10

0

UNS-3.3/3-D5

UNS-5/3-D12

Note: Derating curves apply to both SIP and DIP package configurations

Performance Specifications and Ordering Guide

➀

IOUT

(Amps)

R/N (mVp-p)

Â

Load

VOUT

(Volts)

Package

(Case,

Pinout)

Efficiency

Regulation (Max.)

Ã

Line

VIN Nom.

(Volts)

Range

(Volts)

Model

Á

IIN ➄

(mA)

Max.

Typ.

Typ.

Min.

Output Input

UNS-3.3/3-D5 3.3 3 50 100 ±1.0% ±3.0% 7.5 4.75-13.6 1/1400 -- 90% B1, P18
UNS-3.3/3-D5D 3.3 3 50 100 ±1.0% ±3.0% 7.5 4.75-13.6 1/1400 -- 90% B2, P18
UNS-5/3-D12 5 3 50 100 ±1.0% ±3.0% 12 6-16.5 1/1330 -- 92% B1, P18
UNS-5/3-D12D 5 3 50 100 ±1.0% ±3.0% 12 6-16.5 1/1330 -- 92% B2, P18

➀

Typical at TA = +25°C under nominal line voltage and full-load conditions, unless otherwise noted.

➁

"D" suffix indicates DIP package.

➂

Ripple/Noise (R/N) measured over a 20MHz bandwidth with a 100µF external input capacitor and a
220µF external output capacitor. Additional ouput capacitors will lower R/N. See T echnical Notes.

➃

Listed output regulation specifications describe the total change in output voltage as the input (line)
voltage or output (load) current is varied over its full specified range. Typically , line regulation is
better than ±0.5% and load regulation is better than ±1.0%. Load regulation applies for 0 to 100% load conditions.

➄

Nominal line voltage, no-load/full-load conditions.