TLV755P: Pulldown resistance

user6142633

Part Number: TLV755P

Hi, teams.

I wan to calculate the discharge time.

In DS, only typical value is specified for Rpulldown.

How much variation should we consider?

Regards,

Hayakawa

0 Rohit Phogat1 over 2 years ago

Hey Hayakawa-san,

The Pulldown resistance depends a lot on the VIN conditions of the LDOs apart from temperature and manufacturing process variations.

We generally don't characterize the Rpulldown variations and it would be difficult to provide a guaranteed variation range for the same.

Could you please provide details about VIN conditions and I can give some ball-park estimation on the variation.

Regards,
Rohit

0 user6142633 over 2 years ago in reply to Rohit Phogat1

Hi, Rohit

Thank you for your reply.
We have 2 condition that VIN = 3.3V and 5V.
It would be helpful if you could estimate the variation.

Regards,

Hayakawa

0 Rohit Phogat1 over 2 years ago in reply to user6142633

Hayakawa,

Let me validate some numbers on this internally and I will come back to you by Thursday EOB.

Regards,
Rohit Phogat

0 user6142633 over 2 years ago in reply to Rohit Phogat1

Hi, Rohit

How is the progress?

Regards,

Hayakawa

+1 Rohit Phogat1 over 2 years ago in reply to user6142633

Hayakawa,

Based on our simulation data, expected variation would be approx. +/-30% across temperature, and manufacturing process for both 3.3V and 5V VIN.

For VIN = 3.3V, the Rpulldown will increase to approx. 180 ohm (typical value).

Please let me know in case further details are needed.

Regards,
Rohit

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