UNR D5/D12 Series
www.murata-ps.com
Single Output, Non-Isolated, 5 or 12VIN to 1.8/2.5/3.3VOUT
8 and 10 Amp DC/DC Converters
OBSOLETE PRODUCT
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
VOUT user-trimmable from 1.28V to 3.6V
Non-isolated, full synchronous topology
1" x 2" through-hole or SMT package
Gull-wing leads for SMT package
High efficiency to 91%; Low noise
200kHz switching; Planar magnetics
–40 to +40/50/60°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 requirement.
With input voltages of 5V (-D5 models) and 12V (-D12 models) these converters
offer standard output voltages of 1.8, 2.5 and 3.3 Volts and up to 10 Amps of output
current in both through-hole and surface-mount 1" x 2" metal cases.
With on/off control and output voltage trim capability as standard features, these
non-isolated converters exploit full synchronous rectification, planar magnetics, and
100% automated assembly to deliver high efficiencies (to 91%) and low noise at low
cost.
These versatile DC/DC’s are fully line and load regulated. They feature quick
transient response (50µsec), user-optional on/off control (for power sequencing),
and output overcurrent detection and shutdown ("hiccup" technique with auto-recovery). Their impressive guaranteed efficiencies enable them to deliver fully rated
output power from –40 to +50/55°C (ambient) without supplemental cooling.
If your high current requirements have made the use of inefficient linear regulators impractical, take a look at one of Murata Power Solutions’ new switching buck
regulators. Their high efficiency, ease-of-use, long-term reliability, and overall cost
effectiveness will impress you. Safety agency approvals and EMC characterizations
are currently in progress.
Last time buy: 3 March 2014
Click here for more information.
+VIN
+VOUT
INPUT
RETURN
LOGIC
GROUND
OUTPUT
RETURN
VOLTAGE
BOOST
➀
OVERCURRENT
DETECTION
+VCC
ON/OFF
CONTROL
PWM
CONTROLLER
REFERENCE &
ERROR AMP
Figure 1. Simplified Schematic
VOUT
TRIM
➀ -D5 models only.
Typical topology is shown.
For full details go to
www.murata-ps.com/rohs
www.murata-ps.com/support
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