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TPS61085 Datasheet(PDF) 19 Page - Texas Instruments

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No. de Pieza. TPS61085
Descripción  650-kHz,1.2-MHz, 18.5-V Step-Up DC-DC Converter
Descarga  30 Pages
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Fabricante  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
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TPS61085 Datasheet(HTML) 19 Page - Texas Instruments

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VIN
VOUT
GND
TPS61085
TPS61085
www.ti.com
SLVS859B – JUNE 2008 – REVISED DECEMBER 2014
11 Layout
11.1 Layout Guidelines
For all switching power supplies, the layout is an important step in the design, especially at high peak currents
and high switching frequencies. If the layout is not carefully done, the regulator could show stability problems as
well as EMI problems. Therefore, use wide and short traces for the main current path and for the power ground
tracks. The input capacitor, output capacitor, and the inductor should be placed as close as possible to the IC.
Use a common ground node for power ground and a different one for control ground to minimize the effects of
ground noise. Connect these ground nodes at the GND terminal of the IC. The most critical current path for all
boost converters is from the switching FET, through the rectifier diode, then the output capacitors, and back to
ground of the switching FET. Therefore, the output capacitors and their traces should be placed on the same
board layer as the IC and as close as possible between the IC’s SW and GND terminal.
11.2 Layout Example
Figure 22. TPS61085 Layout Example
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