PMIC VGEN6 and AR8031 Sabre Current Inconsistency

[atillametetured]

Greetings,

The AR8031 IC on the Sabre Smart Devices is powered by VGEN6, 6th linear regulator of the PF0100. This regulator is capable of 1,8V - 3,3V voltage supply which is a check, since AR8031 nominal value is 3,3V. However, regarding the datasheet of AR8301, one can find the below table.

As you can see the maximum current total that can be drawn by the IC is way above 200 mA, which is the maximum PF0100 is designed for. This arises the question whether if this is because it was thought the currents given on the table are improbable simultaneously or someone missed the table designing the board? This confuses me, can someone please explain why this is a valid design?

Best Regards,

Mete

[igorpadykov · Accepted solution]

Hi Atilla

acording to AR8031 datasheet p.1:

"The AR8031 requires only a single, 3.3V power

supply. On-chip regulators provide all the other

required voltages."

LX 1.1V integrated switching regulator provides power for AVDDL,DVDDL,

so power consumption AVDDL,DVDDL is included in AVDD33 consumption

(powered by VGEN6).

Best regards

igor

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[atillametetured]

Hello Igor,

I think you are right. Thanks for you reply.

Regards,

Mete