MAX8740 Ver la hoja de datos (PDF) - Maxim Integrated

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MAX8740

TFT-LCD Step-Up DC-DC Converter

Maxim Integrated 

TFT-LCD Step-Up DC-DC Converter

3) Place the feedback voltage-divider-resistors as

close to the FB pin as possible. The divider’s center

trace should be kept short. Placing the resistors far

away causes the FB trace to become an antenna

that can pick up switching noise. Avoid running the

feedback trace near LX.

4) Place the IN pin bypass capacitor as close to the

device as possible. The ground connection of the

IN bypass capacitor should be connected directly

to GND pins with a wide trace.

5) Minimize the length and maximize the width of the

traces between the output capacitors and the load

for best transient responses.

6) Minimize the size of the LX node while keeping it

wide and short. Keep the LX node away from the

feedback node and analog ground. Use DC traces

as a shield if necessary.

Refer to the MAX8740 evaluation kit for an example of

proper board layout.

Chip Information

TRANSISTOR COUNT: 2746

PROCESS: BiCMOS

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