MMPF0100 pin connection when unused.

[satoshishimoda]

Hi community,

Our partner have some question about MMPF0100 connection when unused.

Please see Table 1 of AN4717 (Schematic Guidelines for the MMPF0100).

[Q1]

The recommended connection when not used for the following pins are "Leave floating".

VGENx

VINREFDDR

VREFDDR

SWxFB

SWxLX

We want to confirm the meaning of "Leave floating".

I understand "Leave floating" means "No Connect", so all circuits and materials written in "Recommended connection" column (e.g. capacitor, shottky diode for SWBSATLS) are NOT required.

Is this correct?

[Q2]

Please see the "Recommended connection when not used" for VINx.

These are written as "Connect to regulator with output voltage < 3.*V", or "Connect to VIN".

I understood these power supplies are required even if all VGEN outputs are unused, we cannot be these pins as "Leave floating".

Is this correct?

Best Regards,

Satoshi Shimoda

[igorpadykov · Accepted solution]

HI Satoshi

1. you are right, all mentioned circuits and materials are NOT required

2. correct

Best regards

igor

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