Typical Unit

+INPUT

(2)

COMMON

(3)

PWM

CONTROLLER

CURRENT

SENSE

REFERENCE &

ERROR AMP

ON/OFF

CONTROL

(1)

TRIM

(5)

+OUTPUT

(4)

+SENSE

(6)

COMMON

(3)

Features

Figure 1. Simplified Schematic

DATEL's LSM D3 Series for SMT (surface-mount) are non-isolated DC/DC

converters that accept a 3.3V input (3.0V to 3.6V input range) and deliver 1V, 1.2V,

1.5V, 1.8V, 2V or 2.5V outputs at 10 Amps. LSM D3 SMT's are designed to take on-

board 3.3V 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.

The LSM D3's miniature size makes them ideal for true point-of-use/load power

inches (8.64 mm) high. The SMT package is designed for pick and place including

lead free reflow soldering, and they typically require no additional external compo-

nents.

The LSM's best-in-class power density is achieved with a fully synchronous,

fixed-frequency (300kHz), buck topology that also delivers: high efficiency (94% for

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 and over-temperature protection, an output-voltage trim function, a remote on/

off control pin (pull low to disable), and a sense pin. High efficiency enables the LSM

D3's to deliver rated output currents of 10 Amps at ambient temperatures to +70°C

with no air flow (natural convection).

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

LSM SMT's (or equivalent LSN SIP's). All devices are UL/IEC/EN60950 certified and

EMC compliant. UL, CB, HALT and EMC reports are available upon request.

Step-down buck regulators with

industry-standard SMT footprint

3.3V input (3.0-3.6V range)

Non-isolated, fixed-frequency,

synchronous-rectifier topology

Tape and reel SMT package

±1% setpoint accuracy

Efficiencies to 94% @ 10 Amps

Noise as low as 30mVp-p

Stable no-load operation

Remote on/off control

Sense pin and output voltage trim

Thermal shutdown

No derating to +70°C, natural convection

UL/IEC/EN60950 certified

EMC compliant

For devices with the sense-pin removed ("B" suffix),

the feedback path is through the +Output pin and not

the +Sense pin.

Typical topology is shown

LSM-10A D3 Models

10 Amp DC/DC’s in SMT Packages

For full details go to

www.murata-ps.com/rohs

www.murata-ps.com

MDC_LSM-10A D3.B01 Page 1 of 13