LSM2-T-30-D12-C Datasheet, PDF (5/12 Pages) Murata Manufacturing Co., Ltd. – DOSA-SMT, 30A POL DC/DC Converters

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, install external fuse.
Recommended External Fuse
35 Amps, fast blow
Input Current:
Full Load Conditions
Inrush Transient
Shutdown Mode (Off, UV, OT)
Output Short Circuit
Low Line (VIN=Vmin, 5VOUT)
See Ordering Guide
0.4 A²Sec.
5 mA
60 mA
18.9 Amps
Remote On/Off Control (Note 5)
Negative Logic (No model suffix)
Current
ON = Open pin or 0 to +0.55 V max.
OFF = +3.0V min. to +VIN max.
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
±0.01% per ^οC of VOUT range
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)
(98% of VOUT setting)
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
VOUT=±100 mV of Sequence In
Tracking accuracy, falling input
VOUT=±200 mV of Sequence In
Remote Sense to VOUT
0.5V max. (Note 7)
LSM2-T/30-D12 Series
DOSA-SMT, 30A POL DC/DC Converters
Dynamic Characteristics
Dynamic Load Response
(50-100-50% load step, di/dt=20A/μSec)
60 μSec to within ±2% of final value
Start-Up Time
(VIN on to VOUT regulated or On/Off to VOUT)
10 mSec for VOUT=nominal
Switching Frequency
430 KHz
Calculated MTBF (4)
Operating Temperature Range
With derating
Storage Temperature Range
Thermal Protection/Shutdown
MSL Rating
Relative Humidity
Environmental
3,917,077 Hours
-40 to +85°C. (Note 9)
See Derating Curves (Note 12)
-55 to +125°C.
+115°Celsius
2
to 85%/+85°C, non-condensing
Outline Dimensions
Weight
Electromagnetic Interference
(conducted and radiated)
Safety
Physical
See Mechanical Specifications
0.28 ounces (7.8 grams)
Meets EN55022/CISPR22
(may need external filter)
Meets UL/cUL 60950-1, IEC/EN 60950-1,
2nd edition
Absolute Maximum Ratings
Input Voltage (Continuous or transient)
+15 Volts
On/Off Control (negative logic)
Zero Volts min. to +VIN max.
Input Reverse Polarity Protection
None, install external fuse.
Output Current (Note 7)
Current-limited. Devices can withstand
sustained short circuit without damage.
Storage Temperature
-55 to +125^°C.
Lead Temperature
See soldering guidelines
Absolute maximums are stress ratings. Exposure of devices to greater than 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 neither implied nor recommended.
Specification Notes:
(1) Specifications are typical at +25°C, VIN=nominal (+12V), VOUT=nominal (+5V), full load, external
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-
ing is CIN=2 x 100 μF tantalum, Cbus=1000 μF electrolytic, Lbus=1 μH.
(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
open collector/open drain transistor or logic gate which does not exceed +VIN.
(6) Short circuit shutdown begins when the output voltage degrades approximately 2% from the
selected setting.
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