LSN2A Datasheet, PDF (5/15 Pages) Murata Manufacturing Co., Ltd. – Non-isolated, DOSA-SIP, 6/10/16A Selectable-Output DC/DC Converters

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LSN2 Series
Non-isolated, DOSA-SIP, 6/10/16A
Selectable-Output DC/DC Converters
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Figure 1. LSN2 Series Simplified Schematic
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Typical topology is shown
TECHNICAL NOTES
I/O Filtering and Noise Reduction
All models in the LSN2 Series are tested and specified with external 1 || 10μF
ceramic/tantalum output capacitors 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'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.
In particular, the LSN2's input capacitors are specified for low ESR and are
fully rated to handle the units' input ripple currents. Similarly, the internal out-
put capacitors are specified for low ESR and full-range frequency response.
In critical applications, input/output ripple/noise may be further reduced using
filtering techniques, the simplest being the installation of external I/O caps.
External input capacitors serve primarily as energy-storage devices. They
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 appropriate 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 specific system
configuration may necessitate additional considerations.
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