PMIC and i.MX6UL Connection

[surendrajadhav]

Hi,

i.MX6UL has VDD_SoC_IN and VDD_ARM_CAP power rails to drive internal core and other logic circuit. Its operating range is from 0.925V to 1.3V(Max. and LDO bypassed).The same is shown in attached image as CPU_Power.

While PMIC IC(MC34PF3000A7EP) we used preprogrammed OTP configuration with which default supply available on OTP_SW1B_VOT rail is 1.4V as shown attached images PMIC_PWR1 and PMIC_PWR2. We have connected this PMIC rails to VDD_SoC _IN and VDD_ARM_CAP. The same observed in one of the Evaluation kit.

I am worried as PMIC output is exceeding the required CPU input voltage.

Let me know your inputs on this.

Regards,

Surendra Jadhav.

[igorpadykov]

Hi Surendra

by default processor works in ldo enabled mode, with max.1.5V according to

Table 11 Operating Ranges Datasheet http://cache.freescale.com/files/32bit/doc/data_sheet/IMX6ULCEC.pdf 

Immediately after power up, software can change pmic voltages if necessary  .

Best regards
igor
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