lsm-1.8/16-w3 C&D Technologies., lsm-1.8/16-w3 Datasheet

lsm-1.8/16-w3

Manufacturer Part Number

lsm-1.8/16-w3

Description

Non-isolated, Wide Input Smt Dc/dc Converters

Manufacturer

C&D Technologies.

Datasheet

1.LSM-1.816-W3.pdf (12 pages)

Current page: 1 of 12
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FEATURES

Step-down, wide input buck regulators for

distributed 3-5V power architectures

3V to 5V wide-input range

0.75/1/1.2/1.5/1.8/2/2.5/3.3V

Non-isolated, fixed-frequency,

synchronous-rectifier topology

Tape and reel SMT package

±1% setpoint accuracy

Efficiencies to 95% @ 16 Amps

Noise as low as 30mVp-p

Stable no-load operation

Remote on/off control

Sense pin and output voltage trim

No derating to +65°C with no fan

UL/IEC/EN60950-1 certification pending

EMC compliant

SIMPLIFIED SCHEMATIC

CONTROL

COMMON

ON/OFF

+INPUT

(1)

(3)

(2)

www.murata-ps.com/rohs

For full details go to

OUT

@16A

CONTROLLER

LSM Series W3 SMT’s (surface-mount pack-

ages) are ideal building blocks for emerging,

on-board power-distribution schemes in

which isolated 3 to 5.5V buses deliver power

to any number of non-isolated, step-down

buck regulators. LSM W3 DC/DC’s accept 3

to 5.5 Volts 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, or 3.3 Volt output fully

rated at 16 Amps.

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.

achieved with a fully synchronous, fixed-

frequency, buck topology that also delivers:

high efficiency (97%, 3.3V

PRODUCT OVERVIEW

www.murata-ps.com

PWM

LSM W3’s are ideal point-of-use/load

The LSM’s best-in-class power density is

Figure 1. Simplified Schematic

CURRENT

SENSE

OUT,

8A), low noise

Non-Isolated, Wide Input SMT DC/DC Converters

REFERENCE &

ERROR AMP

DC/DC’s in SMT Packages

Technical enquiries email: sales@murata-ps.com, tel:

LSM-16A W3 Models

Non-Isolated, 3-5.5V

(30mVp-p typ.), tight line/load regulation

(±0.1%/±0.25% max.), quick step response

(30µsec), stable no-load operation, and no

output reverse conduction.

overcurrent detection, continuous short-

circuit protection, over-temperature protec-

tion, a remote on/off control pin (pull low to

disable), an output-voltage trim function,

and a sense pin. High efficiency enables the

LSM W3’s to deliver rated output currents of

16 Amps at ambient temperatures to +65°C

with natural convection.

tiple supply voltages, check out the econom-

ics of on-board 3-5.5V distributed power. If

you don’t need to pay for multiple isolation

barriers, DATEL’s non-isolated LSM W3

SMT’s will save you money.

0.75-3.3V

The fully functional LSM’s feature output

If your new system boards call for mul-

MDC_LSM-16A_W3.A03 Page 1 of 12

out

+OUTPUT

+SENSE

COMMON

TRIM

(5)

OUT

(6)

16 Amp

(4)

(3)

+1 508 339 3000

Related parts for lsm-1.8/16-w3

lsm-1.8/16-w3 Summary of contents

Page 1

... High efficiency enables the LSM W3’s to deliver rated output currents of 16 Amps at ambient temperatures to +65°C with natural convection. If your new system boards call for mul- tiple supply voltages, check out the econom- ics of on-board 3-5 ...

Page 2

... V I OUT OUT Model (Volts) (Amps) Typ. LSM-0.75/16-W3 0. LSM-1/16- LSM-1.2/16-W3 1 LSM-1.5/16-W3 1 LSM-1.8/16-W3 1 LSM-2/16- LSM-2.5/16-W3 2 LSM-3.3/16-W3 3 LSM-T/16-W3 0.75-3 ➅ ➀ Typical +25°C under nominal line voltage and full-load conditions, unless noted. All models A are tested/specified with external 22µ ...

Page 3

... Performance/Functional Specifications Table is not implied. set I/O Filtering and Noise Reduction All models in the LSM W3 Series are tested and specified with external 22µF tantalum input and output capacitors. These capacitors are necessary to accommodate our test equipment and may not be required to achieve desired performance in your application. The LSM’ ...

Page 4

... See Typical Performance Curves. Remote Sense LSM W3 SMT Series DC/DC converters offer an output sense function on pin 6. The sense function enables point-of-use regulation for overcoming mod- erate IR drops in conductors and/or cabling. Since these are non-isolated devices whose inputs and outputs usually share the same ground plane, sense is provided only for the +Output ...

Page 5

... If the output current exceeds it maximum rating by typically 50% (24 Amps the output voltage drops to less than 98 original value, the LSM W3’s internal overcurrent-detection circuitry immediately turns off the converter, which then goes into a “ ...

Page 6

... Non-Isolated, Wide Input SMT DC/DC Converters “T” Model (LSM-T/16-W3) This version of the LSM-W3 series offers a special output voltage trimming feature which is fully compatible with competitive units. The output voltage may be varied using a single trim resistor from the Trim input (pin 5) to Power Common (pin 3) ...

Page 7

... Lastly, when LSM W3 SMT’s are installed in system boards, they are obviously subject to numerous factors and tolerances not taken into account here. If you are attempting to extract the most current out of these units under demanding temperature conditions, we advise you to monitor the output-inductor tempera- ture to ensure it remains below +110° ...

Page 8

... Typical Performance Curves for the LSM W3 SMT Series www.murata-ps.com LSM-16A W3 Models Non-Isolated, Wide Input SMT DC/DC Converters Technical enquiries email: sales@murata-ps.com, tel: MDC_LSM-16A_W3.A03 Page 508 339 3000 ...

Page 9

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Page 11

... Tape & Reel Surface Mount Package DATEL’s LSM series DC/DC converters are the only higher-current (16A) SMT DC/DC’s that can be automatically “pick-and-placed” using standard vacuum- pickup equipment (nozzle size and style, vacuum pressure and placement speed may need to be optimized for automated pick and place) and subse- quently reflowed using high-temperature, lead-free solder. Virtually all SMT DC/DC’ ...

Page 12

... DATEL’s new-generation LSM SMT DC/DC converters are shipped in quantities of 150 modules per tape and reel. 2.063 1.370 2.205 (34.8) (56) (52.4) DIMENSIONS IN INCHES (mm) 0.590 (14.97) 2.44 (62.0) Murato Power Solutions, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A. Tel: (508) 339-3000 (800) 233-2765 Fax: (508) 339-6356 www.murata-ps.com email: sales@murata-ps.com ISO 9001 REGISTERED © ...

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