Part Number: TPS62442-Q1
Tool/software:
Hi, experts.
I plan to use TPS62442-Q1 to step down 5V to 1V，as shown in the manual, the maximum frequency for converting 5V to 1V is 2.67 MHz.
To enable the SSC function, I connect the COMP pin to VCC , does it mean the SW frequence will reach to 2.47*(1+20%)= 2.96Mhz>2.67Mhz？Which may damage this chip.
Hello Liu,
So considering Vout 1V and Vin 5V and minimum on time of 75ns, maximum switching frequency can be 2.67MHz.
So If you want SSC enable, then the switching frequency is internally fixed that is 2.25MHz and with max 20% variation (2.25MHz+20%), It will be typically around 2.7 MHz. But yes for worst case calculation, considering tolerance and max freq variation because of SSC, it will be around 2.97MHz.
So my suggestion will be to have the switching frequency of 2MHz which can be set by setting 2 where SSC is enabled. You can use Rcf to set the fsw to 2MHz.
Thanks,
Farheen
