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RT9178 датащи(PDF) 10 Page - Richtek Technology Corporation

номер детали RT9178
подробное описание детали  200mA, Ultra-Low Noise, Ultra-Fast CMOS LDO Regulator
PDF  11 Pages
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производитель  RICHTEK [Richtek Technology Corporation]
домашняя страница  http://www.richtek.com
Logo RICHTEK - Richtek Technology Corporation

RT9178 датащи(HTML) 10 Page - Richtek Technology Corporation

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RT9178
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DS9178-16 April 2008
www.richtek.com
It should be noted that stability problems have been seen
in applications where “vias” to an internal ground plane
were used at the ground points of the device and the input
and output capacitors. This was caused by varying ground
potentials at these nodes resulting from current flowing
through the ground plane. Using a single point ground
technique for the regulator and it’ s capacitors fixed the
problem. Since high current flows through the traces going
into VIN and coming from VOUT, Kelvin connect the capacitor
leads to these pins so there is no voltage drop in series
with the input and output capacitors.
Optimum performance can only be achieved when the
device is mounted on a PC board according to the diagram
below:
SOT-23-5 Board Layout
GND
V
OUT
EN
V
IN
BP



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