LM5067: Insertion time current & fault timer current source vs temperature

Kazuhiko Hirano

Part Number: LM5067

Hello,

My customer has a couple of questions about LM5067 as follows

Q1:
The Itimer (Insertion time current) variation in the data sheet is large, from -9.5uA to -2.5uA.
They would like to consider the temperature environment and other factors to determine the appropriate variation.
Is there a temperature characteristic graph for Insertion time current?

Q2:
They understand that after calculating Ton as the processing time at startup, it is necessary to set the FaultTimeout to a value greater than this time.
The fault timer current source (85uA), which is used to calculate the fault Timeout, is described in 9.2.2.6.2. Is there any variation or temperature characteristics of the fault timer current source?

Best regards,

K.Hirano

over 4 years ago

0 Avishek Pal over 4 years ago

TI__Mastermind 39700 points

Hi Kazuhiko,

Thanks for reaching out to us. We will get back to you by Monday (31/May/21).

0 Kazuhiko Hirano over 4 years ago in reply to Avishek Pal

TI__Genius 15088 points

Avishek,

Thank you for your response.
I look forward to receiving your feedbacks today.

Best regards,

K.Hirano

0 Rakesh over 4 years ago in reply to Kazuhiko Hirano

TI__Guru** 105531 points

Hi Kazuhiko,

The fault timer current variation with temperature is given in Figure 7-21. The insertion timer current variation is not given as it does not play major role in the design. But, the % variation of insertion timer current is same as fault timer current as they are derived from the same current reference. Hope this helps..

Best regards, Rakesh

Power management

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LM5067: Insertion time current & fault timer current source vs temperature