LSN2-T/30-D12G-C Murata Power Solutions Inc, LSN2-T/30-D12G-C Datasheet - Page 5

• Manufacturer Part Number: LSN2-T/30-D12G-C
• Description: DC/DC Converters & Regulators 12Vin 0.8-5Vout 30A 150W Power Good Out
• Manufacturer: Murata Power Solutions Inc
• Series: LSN2r

Specifications of LSN2-T/30-D12G-C

• Output Power: 150 W
• Input Voltage Range: 6 V to 14 V
• Input Voltage (nominal): 12 V
• Number Of Outputs: 1
• Output Voltage (channel 1): 0.8 V to 5 V
• Output Current (channel 1): 30 A
• Package / Case Size: SIP
• Output Type: Low Voltage Selectable
• Output Voltage: 0.8 V to 5 V
• Product: Non-Isolated / POL
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LSN2-T/30-D12G-C

Performance/Functional Specifi cation Notes:
(1) Specifi cations are typical at +25°C, V
(2) Input Back Ripple Current is tested and specifi ed over a 5Hz to 20MHz bandwidth.
(3) Note that Maximum Power Derating curves indicate an average current at nominal
(4) Mean Time Before Failure is calculated using the Telcordia (Belcore) SR-332
(5) The On/Off Control may be driven with external logic or by applying appropriate exter-
(6) Short circuit shutdown begins when the output voltage degrades approximately 2%
(7) If Sense is connected remotely at the load, up to 0.5 Volts difference is allowed between
I/O Filtering and Noise Reduction
All models in the LSN2-T/30-D12 Series are tested and specifi ed with external
0.01μF, 0.1μF, and 10μF (all paralleled) ceramic/tantalum output capaci-
tors and a 22μF tantalum input capacitor. These capacitors are necessary to
accommodate our test equipment and may not be required to achieve desired
performance in your application. The LSN2-T/30-D12’s are designed with
high-quality, high-performance internal I/O caps, and will operate within spec
in most applications with no additional external components.
ESR and are fully rated to handle the units’ input ripple currents. Similarly, the
internal output capacitors are specifi ed for low ESR and full-range frequency
response.
fi ltering techniques, the simplest being the installation of external I/O caps.
minimize high-frequency variations in input voltage (usually caused by IR drops
in conductors leading to the DC/DC) as the switching converter draws pulses of
current. Input capacitors should be selected for bulk capacitance (at appropri-
ate frequencies), low ESR, and high rms-ripple-current ratings. The switching
nature of modern DC/DCs requires that the dc input voltage source have low ac
impedance at the frequencies of interest. Highly inductive source impedances
can greatly affect system stability. Your specifi c system confi guration may
necessitate additional considerations.
In particular, the LSN2-T/30-D12’s input capacitors are specifi ed for low
In critical applications, input/output ripple/noise may be further reduced using
External input capacitors serve primarily as energy-storage devices. They
load, external caps and natural convection unless otherwise indicated.
All models are tested and specifi ed with external 0.01μF, 0.1μF, and 10μF (all paral-
leled) ceramic/tantalum output capacitors and a 22μF 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 specifi ed performance in your
applications. All models are stable and regulate within spec under no-load conditions.
Input fi ltering is C
input voltage. At higher temperatures and/or lower airfl ow, the DC/DC converter will
tolerate brief full current outputs if the total RMS current over time does not exceed the
Derating curve.
Method 1, Case 3, ground fi xed conditions, TPCBOARD = +25°C, full output load,
natural air convection.
nal voltages which are referenced to –Input Common. The On/Off Control Input should
use either an open collector/open drain transistor or logic gate.
from the selected setting.
the Sense and +V
A larger voltage drop may cause the converter to exceed maximum power dissipation.
Connect sense to +V
IN
OUT
= 2 x 100μF tantalum, C
OUT
pins to compensate for ohmic voltage drop in the power lines.
at the converter if sense is not connected to a remote load.
IN
= nominal (+12V), V
BUS
= 1000μF electrolytic, L
OUT
= nominal (+5V), full
www.murata-ps.com
BUS
= 1μH.
TECHNICAL NOTES
(8) Output noise may be further reduced by adding an external fi lter. See I/O Filtering and
(9) All models are fully operational and meet published specifi cations, including “cold start”
(10) Regulation specifi cations describe the deviation as the line input voltage or output load
(11) Other input or output voltage ranges will be reviewed under scheduled quantity special
(12) Maximum PC board temperature is measured with the sensor in the center.
(13) Do not exceed maximum power specifi cations when adjusting the output trim.
(14) After short circuit shutdown, if the load is partially removed such that the load still
(15) Static Discharge CAUTION: The Power Good output connects directly to the PWM
(16) The maximum output capacitive loads depend on the the Equivalent Series Resistance
(17) Do not use Pre-bias startup and sequencing together. See the Technical Notes below.
PARD) may be reduced below specifi ed limits with the installation of additional
external output capacitors. Output capacitors function as true fi lter elements
and should be selected for bulk capacitance, low ESR, and appropriate fre-
quency response. Any scope measurements of PARD should be made directly
at the DC/DC output pins with scope probe ground less than 0.5" in length.
All external capacitors should have appropriate voltage ratings and be located
as close to the converters as possible. Temperature variations for all relevant
parameters should be taken into consideration.
Output ripple/noise (also referred to as periodic and random deviations or
Noise Reduction.
at –40°C.
current is varied from a nominal midpoint value to either extreme.
order.
exceeds the overcurrent (OC) detection, the converter will remain in hiccup restart mode.
controller. Be sure to use proper grounding techniques to avoid damaging the converter.
Power Good is not valid when using Sequence/Tracking.
(ESR) of theexternal output capacitor. Larger caps will reduce output noise but may
slow transient response or degrade dynamic performance. Use only as much output fi l-
tering as needed and no more. Thoroughly test your system under full load, especially
with low-ESR ceramic capacitors.
Figure 2. Measuring Input Ripple Current
25 Jun 2010 MDC_LSN2-T/30-D12
LSN2-T/30-D12 Series
DOSA-SIP, 30A POL DC/DC Converters
email: [e-mail]
Series.B20Δ
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