Constant On-time Regulator , minimum load and variable load?

k.kral

Other Parts Discussed in Thread: LM25011, LM25017

Hello,

How is stability Constant On-time Regulator for example LM25011 or synchnous cersion LM25017

at zero or almost zero load, for example, 1 mA or less (equipment in a sleeping state) ?
if so, which is effective in order to load 10 mA

Second question

LM 25011 is suitable for this type of load?

100s 1mA, 5mS 100mA, follow burst 2A at 0,5ms etc.

over 11 years ago

0 Vijay86929 over 11 years ago

TI__Genius 11490 points

Hi,

LM25011 needs ~1mA of minimum load to regulate properly. Other than that it should be able to handle the stated loads.

LM25017 works down to 0A load because it is always in CCM (continuous conduction mode).

regards,

0 k.kral over 11 years ago in reply to Vijay86929

Prodigy 180 points

Thank you for your feedback. .

To LM25011

I calculated the exact power consumption in deep sleep The result is 770uA including a resistive divider at feedback LM25011. Just like the minimum load for the LM25011? If not, how is it reflected?
Alternatively, what's stipulated changes to the standard diagram shown in Figure?

0 Vijay86929 over 11 years ago in reply to k.kral

TI__Genius 11490 points

Nothing stands out as abnormal. The output load due to feedback resistor is 2.5V/10k=250uA which is on the lower side of the recommended minimum.

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Constant On-time Regulator , minimum load and variable load?