TPS61026: Power Save Mode

Hi Y.Ottey,

there is no a special loading to enter PSM, it varies with inductor, capacitor, temp and IC process variation, VIN/VOUT ratio.

this is an old device, please suggest the latest and better performance device to customer if possible.

Dear Li 

Thank you for your reply.

I would like to ask adding following questions about power save mode.

1. In the description of power save mode, it is described that the converter operates when the output voltage falls below the lower limit threshold and enters the power save mode in which the output voltage exceeds the upper threshold, but in the case of TPS61026, the above threshold is Is it as follows?
・Upper threshold: About 5.02V to 5.04V
・Lower threshold: About 4.98V

2. Is the switching operation stopped when the TPS61026 exceeds the upper threshold of the output voltage and enters the power save mode?

3. When the TPS61026 is operating in power save mode, does the input current of the TPS61026 (input current to the VBAT pin) change depending on the time the converter is operating?
(Does the input current increase if the converter is running for a long time?)

Regards,

Y.Ottey

Hi Y.Ottey,

1. where did you find the voltage? I didn't have the threshold of the voltage as it is old device.

2. yes, the switching will stop.

3. i don't think so, the average current is the same.

Dear Li

Thank you for your reply.

I would like to adding question.

When operating in Power Save Mode, it is stated that whether the output voltage does not exceed the upper and lower thresholds determines whether the converter operates.
Is the internal comparator used to judge whether the output voltage exceeds the upper and lower thresholds? (If the TPS61026 uses another method, please tell me how this device works.)

Best Regards,

Y.Ottey

Y. Ottey,

you are correct. there is internal comparator to determine enter and exit PSM. 

Dear Li

Thank for you reply.

I understand about PSM method.

I would like to ask adding question.

1.If the output voltage exceeds the upper threshold in Power Save Mode and the switching operation stops, is it possible to recognize that the current input to TPS61026 is 0A?

2.　When the converter operates in Power Save Mode, should it be recognized that it operates at the normal switching frequency (typ. 600kHz)?

Regards,

Y.Ottey