TLV62084: Switching frequency and Over current protection

Hi Nagata-san,

Please see below response to your queries.

1. Typically, the switching frequency decreases as the load current increases to compensate for the increase in the voltage drop on the Mosfets at PWM mode. For Vout = 0.85V (Fsw increases as load current increases), it's possible that there were adjustment on the on-time duration to prevent the Fsw from dropping to minimize the ripple voltage at higher load. Anyway, the switching frequency behaviors shown in the *.xlsx were aligned in the characterization data.

2. TLV62084 operates in peak current limit during OCP/SCP so it will NOT prevent the MOSFETs from permanently turning off (refer to section 8.3.8 of the datasheet). If customer requires a Hiccup mode protection (Mosfets turn-off for several hundreds of us) during OCP/SCP, then they can consider TPS62822 or TPS62825.  

Best regards,

Excel

Hi, Excel -san,

Thank you for your supports and could you please give me advice for additional question for #1?

For your comment:
>> For Vout = 0.85V (Fsw increases as load current increases), it's possible that there were adjustment on the on-time duration to prevent the Fsw from dropping to minimize the ripple voltage at higher load.

1.1 Is there explanation for your comment in datasheet?

1.2 Is the customer evaluation result same as your expectation?

Regards,
Nagata.

Hi Nagata-san,

Please see the response below.

1.1 Is there explanation for your comment in datasheet? --> The behavior is not describe in the datasheet.

1.2 Is the customer evaluation result same as your expectation? --> Yes, the Fsw behavior is expected at Vout = 0.85V.

Best regards,

Excel