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LTC7878 Recommended for New Designs
The LTC7878 is a high performance buck-boost switching regulator controller that operates from an input voltage above, below or equal to the output voltage...
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LTC7878 on Analog.com

Minimum on-time of LTC7878

LeeKJ

on Sep 23, 2024

Category: Datasheet/Specs

Product Number: LTC7878

I would like to ask, is there a specification for the minimum on-time for the LTC7878? It doesn't seem to be provided in the datasheet.

A Note 7 in page 4 of the datasheet (LTC7878 (Rev. A) (analog.com)) has indicated that an on-time is provided, however the hyperlinked page leads to Applications Information section, with no minimum-on time searchable in text or in graphs.

Note 7: The minimum on-time condition is specified for an inductor peak-to-peak ripple current > 40% of IL(MAX) (See Minimum On-Time Considerations in the Applications Information section).

0 Brian1201
on Sep 25, 2024 5:20 PM
LeeKJ said:
I would like to ask, is there a specification for the minimum on-time for the LTC7878?

I don't think the user needs care about the min on-time as it's controlled by the chip internal circuit, but the user should select the inductor carefully based on the load current to ensure the coil saturation current is higher than max load current as detailed in the Application section.

Brian
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Minimum on-time of LTC7878