TMS570LS0432: Load fluctuation of the MCU power supply

Kuerbis

Expert 4145 points

Part Number: TMS570LS0432

Hi Team

We are examining the load response characteristics with the power supply design of VCC and VCCIO.

How much load fluctuation of the MCU power supply should be taken into this consideration?

Thanks and Best regards,

Kuerbis

over 7 years ago

0 QJ Wang over 7 years ago

TI__Guru**** 196306 points

Hello Kuerbis,

The recommended operating conditions are listed in the table 5.4:

The VMON module incorporates a glitch filter for the nPORRST input, and has the capability to filter glitches on the VCC and VCCIO supplies:

0 Kuerbis over 7 years ago in reply to QJ Wang

TI__Expert 4145 points

Hi QJ Wang

My question is as belows.

How to estimate power Fluctuation for user application?

Do you have any suggestion or guide line to design power tree on the system?

What a kind of care do we need to select power device or PMIC?

Thanks and Best regards,

Kuerbis

0 Kuerbis over 7 years ago in reply to Kuerbis

TI__Expert 4145 points

Hi QJ,

Would you please reply for my questions?

Best regards,

Kuerbis

0 QJ Wang over 7 years ago in reply to Kuerbis

TI__Guru**** 196306 points

Hello Kuerbis,

For safety application, we recommend our customer to use TPS65381Q to power our Hercules MCUs.

www.ti.com/.../TPS65381-Q1

The device monitors undervoltage and overvoltage on all regulator outputs, battery voltage, and internal supply rails. A second bandgap reference, independent from the main bandgap reference, is used for the undervoltage and overvoltage monitoring, to avoid any drifts in the main bandgap reference from being undetected. In addition, regulator current-limits and temperature protections are implemented.

0 Kuerbis over 7 years ago in reply to QJ Wang

TI__Expert 4145 points

Hi QJ

Thank you!

Best regards,

Kuerbis

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TMS570LS0432: Load fluctuation of the MCU power supply