Using the SBC FS6500 on the s32k344 microcontroller

[hbsantos]

I would like to use the SBC FS6500 (MC33FS6523CAE) to power the s32k344 172 MaxQFP microcontroller. How can I generate 1.5V on the SBC for the s32k344 core? What is the SBC setting for this voltage level?

[hbsantos]

Hi David,

Thank you very much for this information. My question would be the compensation network... I kept the same values of capacitors and resistors of the external compensation network (R1, C1, R2, C2) for a Vcore = 1.25V, would there be a problem?

Best regards,

Higor.

[diazmarin09 · Accepted solution]

Hello Higor,

Thank you for using the NXP communities.

In this case, please follow the formula below for getting the desired voltage:

VCORE = VCORE_FB x ((R3 + R4)/R4).

You may use the KITFS6522LAEEVM as a reference for your design. The schematic is available.

I hope this information helps.

Regards,

David

[hbsantos]

Hello David,

Thank you for this information!

Regards,

Higor.

[diazmarin09]

Hello Higor,

I hope all is great with you.

In this case, I do recommend using the VCORE regulator.

The FS6500 voltage regulator is a step-down DC–DC converter operating in voltage control mode.

The output voltage is configurable from a 1.0 V to 5.0 V range, and adjustable around these voltages with an external resistor divider (R3/R4) connected between VCORE and the feedback pin (FB_CORE).

Please find further information at chapter 12.7.2.1 from datasheet. The Figure 44 shows the typical VCORE buck regulator configuration.

I hope this information helps.

Regards,

David