LSM-10A D12 Models
www.murata-ps.com
Single Output Non-Isolated,
12Vin, 0.75-5Vout DC/DC Converters
Typical Unit
PRODUCT OVERVIEW
FEATURES
Step-down, wide buck regulators for new
distributed 12V power architectures
input (10.8-13.2V range)
12V
to 5VOUT @10A
0.75
Voltage-selectable "T" version
Non-isolated, fixed-frequency,
synchronous-rectifier topology
and reel SMT package
Tape
±1.25% setpoint accuracy
Efficiencies to 96% @ 10 Amps
Stable no-load operation
Remote on/off control
Sense pin and output voltage trim
derating to +65°C with 100 lfm
No
UL/IEC/EN60950-1 certification pending
compliant
EMC
LSM Series D12 SMT's (surface-mount packages)
are ideal building blocks for emerging, on-board
power-distribution schemes in which isolated
12V buses deliver power to any number of nonisolated, step-down buck regulators. LSM D12
DC/DC's accept a 12V input (10.8V to 13.2V input
range) and convert it, with the highest efficiency
in the smallest space, to a 0.75, 1, 1.2, 1.5, 1.8,
2, 2.5, 3.3 or 5 Volt output fully rated at 10 Amps.
LSM D12's are ideal point-of-use/load power
processors. They typically require no external
components. Their surface-mount packages
occupy a mere 1.3" x 0.53" (33.0 x 13.5mm),
and are only 0.34 inches (8.6mm) high.
The LSM's best-in-class power density
is achieved with a fully synchronous, fixedfrequency, buck topology that also delivers:
high efficiency (96% for 5VOUT models), low
noise (50mVp-p typ.), tight line/load regulation
(±0.1%/±0.25% max.), quick step response
(100μsec), stable no-load operation, and no
output reverse conduction.
The fully functional LSM’s feature output overcurrent detection, continuous short-circuit protection, over-temperature protection, a remote on/off
control pin (pull low to disable), an output-voltage
trim function, and a sense pin. High efficiency
enables the LSM D12's to deliver rated output
currents of 10 Amps at ambient temperatures to
+65°C with 100 lfm air flow.
If your new system boards call for three or
more supply voltages, check out the economics
of on-board 12V distributed power. If you don't
need to pay for multiple isolation barriers, Murata
Power Solutions' non-isolated LSM D12 SMT's
will save you money.
+OUTPUT
(4)
+INPUT
(2)
+SENSE
(6)
COMMON
(3)
COMMON
(3)
CURRENT
SENSE
VCC
ON/OFF
CONTROL
(1)
PWM
CONTROLLER
REFERENCE &
ERROR AMP
VOUT
TRIM
(5)
Typical topology is shown
Figure 1. Simplified Schematic
For full details go to
www.murata-ps.com/rohs
www.murata-ps.com/support
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