LSM-0.8-10-D12 C&D Technologies., LSM-0.8-10-D12 Datasheet

LSM-0.8-10-D12

Manufacturer Part Number

LSM-0.8-10-D12

Description

Non-isolated, 12vin, 0.75-5vo U T Dc/dc Converters

Manufacturer

C&D Technologies.

Datasheet

1.LSM-0.8-10-D12.pdf (18 pages)

Current page: 1 of 18
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FEATURES

Step-down, wide buck regulators for new

distributed 12V power architectures

12V input (10.8-13.2V range)

0.75 to 5V

Voltage-selectable "T" version

Non-isolated, fixed-frequency,

synchronous-rectifier topology

Tape and reel SMT package

±1.25% setpoint accuracy

Efficiencies to 96% @ 10 Amps

Stable no-load operation

Remote on/off control

Sense pin and output voltage trim

No derating to +65°C with 100 lfm

UL/IEC/EN60950-1 certification pending

EMC compliant

CONTROL

COMMON

ON/OFF

+INPUT

OUT

(1)

(3)

(2)

@10A

www.murata-ps.com/rohs

For full details go to

CONTROLLER

PRODUCT OVERVIEW

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 non-

isolated, 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.

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.

is achieved with a fully synchronous, fixed-

frequency, buck topology that also delivers:

high efficiency (96% for 5VOUT models), low

PWM

www.murata-ps.com

LSM D12's are ideal point-of-use/load power

The LSM's best-in-class power density

Figure 1. Simplified Schematic

Typical Unit

CURRENT

SENSE

Non-Isolated, 12V

REFERENCE &

ERROR AMP

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

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.

current detection, continuous short-circuit protec-

tion, 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.

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.

The fully functional LSM’s feature output over-

If your new system boards call for three or

LSM-10A D12 Models

, 0.75-5V

MDC_LSM 10A D12 Models.B01 Page 1 of 18

Single Output

Typical topology is shown

out

DC/DC Converters

+OUTPUT

+SENSE

COMMON

TRIM

(5)

OUT

(6)

(4)

(3)

+1 508 339 3000

Related parts for LSM-0.8-10-D12

LSM-0.8-10-D12 Summary of contents

Page 1

... 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 ...

Page 2

... OUT Technical enquiries email: sales@murata-ps.com, tel: MDC_LSM 10A D12 Models.B01 Page Package ½ Load (Case, Typ. Pinout) 85% C45, P63 86% C45, P63 88% C45, P63 89.5% C45, P63 90.5% C45, P63 91.5% C45, P63 92% C45, P63 93.5% C45, P63 95 ...

Page 3

... Single Output LSM-10A D12 Models Non-Isolated, 12V , 0.75-5V in out I/O Connections Pin Function P63 1 On/Off Control 2 +Input 3 Common 4 +Output 5 V Trim OUT 6 +Sense Case C45 Technical enquiries email: sales@murata-ps.com, tel: MDC_LSM 10A D12 Models.B01 Page DC/DC Converters +1 508 339 3000 ...

Page 4

... See I/O Filtering, Input Ripple Current and Output Noise for details. ➆ On/Off Control for LSM-T/10-D12 only: Positive Logic pin open or to +4V max., Off = pin grounded +0.4V max. Shutdown current is 3µA sink. ...

Page 5

... See Typical Performance Curves. Remote Sense LSM D12 SMT Series DC/DC converters offer an output sense function on pin 6. The sense function enables point-of-use regulation for overcoming moderate 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 6

... High-current-carrying components such as inductors, FET's and diodes are at the highest risk. LSM D12 SMT Series DC/DC converters incorporate an output overcurrent detection and shutdown function that serves to protect both the power converter and its load. ...

Page 7

... If the output current exceeds it maximum rating by typically 70 the output voltage drops to less than 98 original value, the LSM D12's inter- nal overcurrent-detection circuitry immediately turns off the converter, which then goes into a "hiccup" mode. While hiccupping, the converter will continu- ously attempt to restart itself, go into overcurrent, and then shut down ...

Page 8

... In both cases, the cause is the "freewheeling" or "catch" FET biasing itself on and effectively becoming a short circuit. LSM D12 SMT DC/DC converters do not suffer from Output Reverse Conduc- tion. They employ proprietary gate drive circuitry that makes them immune to applied output voltages. ...

Page 9

... The capacitors will not help if the input source has poor regulation. A converter which starts successfully at 3.3 Volts will turn off if the input voltage decays to below the input voltage theshold, regardless of external capacitance. Typical Performance Curves for LSM D12 SMT Series Non-Isolated, 12V Increase the input start up voltage if possible to raise the downward voltage spike ...

Page 10

... Typical Performance Curves for LSM D12 SMT Series www.murata-ps.com Single Output LSM-10A D12 Models Non-Isolated, 12V , 0.75-5V in out Technical enquiries email: sales@murata-ps.com, tel: MDC_LSM 10A D12 Models.B01 Page DC/DC Converters +1 508 339 3000 ...

Page 11

Page 12

Page 13

Page 14

... Typical Performance Curves for LSM D12 SMT Series Start-Up from 12V 0.8V/10A 22µF) IN OUT OUT V IN 5V/div V OUT 1V/div 10msec/div Start-Up from 12V 5V/10A 22µF) IN OUT OUT V IN 5V/div V OUT 2V/div 10msec/div Non-Isolated, 12V V IN 5V/div V OUT ...

Page 15

... Typical Performance Curves for LSM D12 SMT Series Input Reflected Ripple Current (Input Filter = 220µF/12µH/33µ 50mA/div 2µsec/div Output Ripple and Noise (V = 12V 5V/10A 22µF) IN OUT OUT 20mV/div 2µsec/div Non-Isolated, 12V = 12V 5V/10A) OUT 100mV/div Output Ripple and Noise ...

Page 16

... Typical Performance Curves for LSM D12 SMT Series Dynamic Load Response (V = 12V 10A Step OUT = 200mV/div 100µsec/div Dynamic Load Response (V = 12V, V 0.8V 10A Step OUT = 100mV/div 100µsec/div Non-Isolated, 12V = 22µF) OUT 100mV/div = 22µF) OUT 100mV/div www ...

Page 17

... We assemble our SMT DC/DC’ thermally-stable plastic lead-frame (nylon 46, UL94V-0 flammability rated) using a high temper- ature lead-free solder. In addition, the LSM is transitioning to RoHS (Reduction of Hazardous Substances) construction and SAC 305 RoHS-approved solder. The lead-frame ensures coplanarity (to within 0.004 in.) of the unit's copper leads ...

Page 18

... Murata Power Solutions' new-generation LSM SMT DC/DC converters are shipped in quantities of 150 modules per tape and reel. 2.063 1.370 2.205 (52.4) (34.8) (56) DIMENSIONS IN INCHES (mm) 0.590 (14.97) 2.44 (62.0) Murata 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 Murata Power Solutions, Inc ...

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