廬
廬
INNOVATION and EXCELLENCE
Single Output
UNS Series
Non-Isolated, 3.3V and 5V
3 Amp, DC/DC Converters
Features
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Low cost
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SIP or DIP packaging
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3.3V (10W) or 5V (15W) outputs
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Wide range inputs:
4.75-13.6V for 3.3V models
6-16.5V for 5V models
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High efficiencies, typically 90-92%
Low output noise, 50mVp-p
Remote on/off control
100碌A(chǔ) "standby" input current
Output current limiting
EMC compliant
Highly reliable, 100% SMT construction
Conformally coated for harsh
environments
Low cost, high efficiency, wide input voltage range and low output noise define
DATEL鈥檚 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 configura-
tions. 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鈥?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擄C. With
derating, they operate up to +70擄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 100碌A(chǔ) 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.
+V
IN
+V
OUT
+V
IN
+V
OUT
鈥揤
IN
TRIM
OUTPUT
RETURN
OUTPUT
RETURN
鈥揤
IN
ON/OFF
CONTROL
PWM
CONTROLLER
REFERENCE &
ERROR AMP
Figure 1. Simplified Schematic
DATEL, Inc., Mansfield, MA 02048 (USA)
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Tel: (508)339-3000, (800)233-2765 Fax: (508)339-6356
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Email: sales@datel.com
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Internet: www.datel.com
This Material Copyrighted by Its Respective Manufacturer
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