廬
廬
INNOVATION and EXCELLENCE
Single Output
UNR Series
Non-Isolated, 1.8/2.5/3.3V
OUT
8 and 10 Amp DC/DC Converters
Features
Input ranges of 4.75-5.5V or 10.8-13.6V
Output voltages of 1.8/2.5/3.3V
8 and 10 Amp output current models
Non-isolated, full synchronous topology
1" x 2" through-hole package
High ef鏗乧iency to 91%; Low noise
200kHz switching frequency
鈥?0 to +40/50/60擄C ambient operation with
no derating
Remote on/off control; Output overcurrent
detection
IEC950/EN60950/UL1950 approval
As supply voltages trend lower and load currents increase, centralized power
becomes more impractical. The tight accuracy, low noise and quick transient
response demanded by today's low voltage CPU's, ASIC's and DSP's make power
processing at the point of use the only viable solution. The UNR 18-33W series
provides a complete line of non-isolated DC/DC converters to satisfy this require-
ment. With input voltages of 5V (-D5 models) and 12V (-D12 models) these convert-
ers offer standard output voltages of 1.8, 2.5 and 3.3 Volts and up to 10 Amps of
output current in through-hole 1" x 2" metal cases.
With on/off control as a standard feature, these non-isolated converters exploit
full synchronous recti鏗乧ation, and 100% automated assembly to deliver high ef鏗?
ciencies (to 91%) and low noise at low cost.
These versatile DC/DC鈥檚 are fully line and load regulated. They feature quick
transient response (50碌sec), user-optional on/off control (for power sequencing),
and output overcurrent detection and shutdown ("hiccup" technique with auto-
recovery). Their impressive guaranteed ef鏗乧iencies enable them to deliver fully rated
output power from +40/50/60擄C (ambient) without supplemental cooling.
If your high current requirements have made the use of inef鏗乧ient linear regula-
tors impractical, take a look at one of DATEL鈥檚 switching buck regulators. Their
high ef鏗乧iency, ease-of-use, long-term reliability, and overall cost effectiveness will
impress you. Safety agency approvals and EMC characterizations are currently in
progress.
+V
IN
+V
OUT
INPUT
RETURN
OUTPUT
RETURN
鉃€
LOGIC
GROUND
VOLTAGE
BOOST
+V
CC
ON/OFF
CONTROL
PWM
CONTROLLER
OVERCURRENT
DETECTION
REFERENCE &
ERROR AMP
鉃€
-D5 models only.
Figure 1. Simpli鏗乪d Schematic
DATEL, Inc., Mans鏗乪ld, MA 02048 (USA)
鈥?/div>
Tel: (508)339-3000, (800)233-2765 Fax: (508)339-6356
鈥?/div>
Email: sales@datel.com
鈥?/div>
Internet: www.datel.com
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