TPS610333: Output disconnect and Frequency in Auto PFM mode

Naveen Kumar

Prodigy 30 points

Part Number: TPS610333

Tool/software:

Hi,

Could you please clarify the following questions?

Does the TPS610333 switcher fully disconnect the output when disabled, or does the input voltage pass through the body diode of the P-Channel FET?
At what frequency does the converter switch when operating in Auto PFM mode? From the datasheet, I understand it is variable, but is there a nominal value?

My design requirement is: Output current ranging from 0.5A to 1A max with an input voltage of 3.3V.

Best Regards,

Naveen

7 days ago

0 Shipeng Cheng 6 days ago

TI__Genius 12680 points

Hi Naveen,

Lei will reply tomorrow. Thanks.

0 Lei Zhong 5 days ago

TI__Genius 14680 points

Hi Naveen,

The TPS610333 has true disconnection between input and output during shutdown.

The overall frequency at PFM mode is heavily depends on the load, there is not a nominal frequency. As my calculation, when Vin = 3.3V and Vout = 5V, and Iout >= 0.5A, the TPS610333 won't enter the PFM mode.

Regards

Lei

Power management

Power management forum

TPS610333: Output disconnect and Frequency in Auto PFM mode