LSM2-T/30-D12 Series

DOSA-SMT, 30A POL DC/DC Converters

www.murata-ps.com

MDC_LSM2_T30_D12 Series.B11 Page 4 of 12

Performance and Functional Specifications

See Note 1

Input

Input Voltage Range

See Ordering Guide

Isolation

Not isolated. Input and output

Commons are internally connected.

Start-Up Voltage

5.6 Volts

Undervoltage Shutdown

5 Volts

Overvoltage Shutdown

None

Reflected (Back) Ripple Current (Note 2) 50 mA pk-pk

Internal Input Filter Type

Capacitive

Reverse Polarity Protection

None, see fuse information

Input Current:

Full Load Conditions

See Ordering Guide

Inrush Transient

Shutdown Mode (Off, UV, OT)

5 mA

Output Short Circuit

60 mA

No Load, 5V out

210 mA

18.9 Amps

Remote On/Off Control (Note 5)

Negative Logic (No model suffix)

ON = 0 to +0.55 V max.

(See Note 18)

Current

1.3 mA max.

Output

Minimum Loading

No minimum load

Accuracy (50% load)

±1.5 % of Vnominal

Voltage Adjustment Range (Note 13)

See Ordering Guide

Overvoltage Protection (Note 20)

None

Temperature Coefficient

Ripple/Noise (20 MHz bandwidth)

See Ordering Guide and Note 8

Line/Load Regulation (See Tech. Notes)

See Ordering Guide and Note 10

Efficiency

See Ordering Guide

Maximum Capacitive Loading (Note 15)

Cap-ESR=0.001 to 0.01 Ohms

5,000

µF

Cap-ESR >0.01 Ohms

10,000

µF

Current Limit Inception (Note 19)

48 Amps (cold startup)

42 Amps (after warm up)

Short Circuit Mode (Note 6)

Short Circuit Current Output

600 mA

Protection Method

Hiccup autorecovery upon overload

removal. (Note 17)

Short Circuit Duration

Continuous, no damage (output shorted

to ground)

Prebias Startup (Note 16)

Converter will start up if the external

output voltage is less than Vnominal.

Sequencing

Slew Rate

2V per millisecond max.

Startup delay until sequence start

10 milliseconds min.

Tracking accuracy, rising input

Tracking accuracy, falling input

0.5V max. (Note 7)

Dynamic Characteristics

Dynamic Load Response

60

µSec to within ±2% of final value

(50-100-50% load step, di/dt=20A/

µSec)

Start-Up Time

Switching Frequency

430

±30 KHz

Environmental

Calculated MTBF (4)

3,917,077 Hours

Operating Temperature Range

-40 to +85°C. (Note 9)

With derating

See Derating Curves (Note 12)

Storage Temperature Range

-55 to +125°C.

Thermal Protection/Shutdown

+115°Celsius

Relative Humidity

to 85%/+85°C, non-condensing

Physical

Outline Dimensions

See Mechanical Specifications

Weight

0.28 ounces (7.8 grams)

Electromagnetic Interference

FCC part 15, class B, EN55022 (may need

(conducted and radiated)

external filter)

Safety

Designed to meet UL/cUL 60950-1 CSA-C22.2

No. 60950-1, IEC/EN 60950-1

Absolute Maximum Ratings

Input Voltage (Continuous or transient)

+15 Volts

On/Off Control (negative logic)

Input Reverse Polarity Protection

Output Current (Note 7)

Current-limited. Devices can withstand

sustained short circuit without damage.

Storage Temperature

Lead Temperature (soldering 10 sec. max.)

+280°C.

Absolute maximums are stress ratings. Exposure of devices to any of these conditions may

adversely affect long-term reliability. Proper operation under conditions other than those listed in

the Performance/Functional Specifications Table is not implied nor recommended.

Specification Notes:

caps and natural convection unless otherwise indicated. Tests at full power should supply

substantial forced airflow.

All models are tested and specified with external 0.1µF and 10 µF paralleled ceramic/tantalum

output capacitors and a 22 µF external input capacitor. All capacitors are low ESR types. These

capacitors are necessary to accommodate our test equipment and may not be required to achieve

specified performance in your applications. All models are stable and regulate within spec under

no-load conditions.

(2) Input Back Ripple Current is tested and specified over a 5 Hz to 20 MHz bandwidth. Input filter-

(3) Note that Maximum Power Derating curves indicate an

average current at nominal input

voltage. At higher temperatures and/or lower airflow, the DC/DC converter will tolerate brief full

current outputs if the total RMS current over time does not exceed the Derating curve.

(4) Mean Time Before Failure is calculated using the Telcordia (Belcore) SR-332 Method 1, Case 3,

ground fixed conditions, Tpcboard=+25°C, full output load, natural air convection.

(5) The On/Off Control may be driven with external logic or by applying appropriate external volt-

ages which are referenced to -Input Common. The On/Off Control Input should use either an

(6) Short circuit shutdown begins when the output voltage degrades approximately 2% from the

selected setting.