MP4566―36V, 1MHz, 0.6A, STEP-DOWN CONVERTER WITH 35μA QUIESCENT CURRENT

MP4566 Rev. 1.01

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13

9/22/2011

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1) Keep the path of switching current short

and minimize the loop area formed by

Input capacitor, high-side MOSFET and

external switching diode.

2) Bypass ceramic capacitors are suggested

to be put close to the VIN pin.

3) Ensure all feedback connections are short

and direct. Place the feedback resistors

as close to the chip as possible.

4) Route SW away from sensitive analog

areas such as FB.

5) Connect IN, SW and especially GND

respectively to a large copper area to cool

the chip to improve thermal performance

and long-term reliability.

10MQ100N

Figure 3—MP4566 Typical Application Circuit