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INNOVATION and EXCELLENCE
Single Output
USN D5 Models
Non-Isolated, 5VIN, 1.5-3.3VOUT
8/10A DC/DC’s in SIP Packages
DATEL’s new USN D5 Series SIP’s (single-in-line packages) are non-isolated
DC/DC converters that accept a 5V input (4.5V to 5.5V input range) and deliver 1.5V,
1.8V, 2.5V or 3.3V outputs at either 8 or 10 Amps. USN D5 SIP’s are designed to take
on-board 5V power and convert it, with the highest efficiency in the smallest space, to
any lower voltage required by today’s current-hungry DSP’s, ASIC’s and CPLD’s.
USN’s are ideal for true point-of-use power processing. They occupy a mere
0.8 square inches of board space (2" length, 0.4" width, 0.53" height). Their fully
synchronous, fixed-frequency (200kHz), buck topology delivers high efficiency (91%
for 3.3VOUT models), tight regulation (±0.1%/±0.5% line/load), stable no-load opera-
tion, and low output noise (25mVp-p for 1.5/1.8VOUT models).
Features
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Industry-standard SIP pinout
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Shorter (2.0" vs. 2.5") package length
4.5-5.5V input range
1.5/1.8/2.5/3.3V outputs @ 8 or 10 Amps
Non-isolated, fully synchronous,
200kHz, buck topology
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Superior performance vs. competitors:
The fully functional USN’s feature input undervoltage shutdown, output overcur-
rent detection, continuous short-circuit protection, a wide-range output-voltage trim
function, a remote on/off control pin, and an optional sense pin.
USN’s are pin compatible with similar devices from Lucent/Tyco, Artesyn Tech-
nologies and Power-One. USN’s, however, deliver more current (10A vs. 6A), from
a smaller package (2.0" vs. 2.5" long), with better accuracy (±1% max.), tighter
regulation, less noise, and superior temperature performance. If a USN SIP is
operated at only 6 Amps, for example, it can reliably operate up to +65°C (with
100lfm air flow).
If your low-voltage, high-current requirements have made the use of inefficient
linear regulators impractical, take a look at one of DATEL’s easy-to-use, low-cost
USN SIP’s. All devices are UL1950/EN60950 certified and EMC compliant. UL, CB
and EMC reports are available upon request.
• 8/10 Amps vs. 6 Amps
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1ꢀ setpoint accuracy
Efficiencies to 91ꢀ
Noise as low as 25mVp-p
Stable no-load operation
Wide-range trimmable output voltage
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Remote on/off control; Optional sense pin
Power-good pin and "Lucent-compatible"
on/off control available
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EN60950 and UL1950 certified
EMC compliant
+OUTPUT
+INPUT
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+SENSE
(OPTIONAL)
COMMON
COMMON
CURRENT
SENSE
10kΩ
ON/OFF
CONTROL
PWM
CONTROLLER
REFERENCE &
ERROR AMP
TRIM
■ For devices with the sense-pin option ("R" suffix), the
feedback path is through the +Sense pin and not the
+Output pin.
Figure 1. Simplified Schematic
DATEL, Inc., Mansfield, MA 02048 (USA)
· Tel: (508)339-3000, (800)233-2765 Fax: (508)339-6356 · Email: sales@datel.com · Internet: www.datel.com