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Axelite Confidential Materials, do not copy or distribute without written consent.

Rev.1.1 Oct.16, 2019

AX3165/A

An aluminum electrolytic capacitor's ESR value is related to the capacitance and its

voltage rating. In most case, higher voltage electrolytic capacitors have lower ESR values.

Most of the time, capacitors with much higher voltage ratings may be needed to provide

the low ESR values required for low output ripple voltage. It is recommended to replace

this low ESR capacitor by using a 470µF low ESR values < 80mΩ.

PCB Layout Recommendations

1. Connect the C5 & C10 VIN bypass capacitor next to the VCC pin with a short return to the

VSS pin.

2. Keep the VGAE to VCC bypass capacitor C1 near both pins as it provides the internal P-ch

MOSFET gate driver.

3. Keep the SW traces as short as is practically possible as these carry high peak currents to

decrease the EMI issue.

4. Carefully connect the noise sensitive signals such as FB, COMP as close to the IC as

practically possible.