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LM1771SSDX Folha de dados(PDF) 14 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Nome de Peças LM1771SSDX
Descrição Electrónicos  Low-Voltage Synchronous Buck Controller with Precision Enable and No External Compensation
PDF  18 Pages
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Fabricante Electrônico  NSC [National Semiconductor (TI)]
Página de início  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM1771SSDX Folha de dados(HTML) 14 Page - National Semiconductor (TI)

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Layout
The LM1771, like all switching regulators, requires careful
attention to layout to ensure optimal performance. The fol-
lowing steps should be taken to aid in the layout. For more
information refer to Application Note AN-1299.
1.
Ensure that the ground connections of the input capaci-
tor, output capacitor and NMOS are as close as pos-
sible. Ideally these should all be grounded together in
close proximity on the component side of the board.
2.
Keep the switch node small to minimize EMI without
degrading thermal cooling of the FETs.
3.
Locate the feedback resistors close to the IC and keep
the feedback trace as short as possible. Do not run any
feedback traces near the switch node.
4.
Keep the gate traces short and keep them away from the
switch node as much as possible.
5.
If a small bypass capacitor is used on V
IN (0.1µF) place
it as close to the pin, with the ground connection as
close to the chip ground as possible.
www.national.com
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