VR5510 VCOREMON

K_Steinhammer — Fri, 03 Dec 2021 06:11:41 GMT

I know that VCOREMON has to be connected directly to the core voltage supply of an S32G CPU. But there is no information how to connect this pin if a different CPU with a different core voltage level is used.

Does

the voltage monitor automatically adjust according to BUCK1 output voltage configuration so a direct connection between VCOREMON and BUCK1 output is mandatory
or do I have to insert an external voltage divider between VCOREMON and BUCK1 output?
- What would be the target voltage of this voltage divider (= nominal input voltage of the voltage monitor on VCOREMON pin)?

Thank you.

PS I need a static BUCK1 output voltage of 1.0V for my use case.

Re: VR5510 VCOREMON

JozefKozon — Fri, 03 Dec 2021 08:30:41 GMT

Dear Klaus,

the VCOREMON automatically sets to the BUCK1 or BUCK1/2 in dual phase output voltage. You just need to set the BUCK1 output voltage. The VCOREMON overvoltage and undervoltage thresholds are listed in Table 57. in the VR5510 datasheet.

The output voltage is configurable by OTP through the BUCK1V_OTP [7:0] bit field (CFG_ BUCK1_1_OTPregister) or the BUCK2V_OTP [7:0] bit field (CFG_ BUCK2_ 1_OTP register) from 0.4 V
to 1.8 V.

Please refer to section 23.6.2 in the VR5510 datasheet for the BUCK1/2 output voltage transition.

With Best Regards,

Jozef

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