Hi team,
customer would like use LMQ62440A-Q1 to replace the LM61435AFS version since delivery issue.
for LM61435AFS, they select 2.1MHz,
check the LMQ62440A-Q1 d/s, if pin 6 mode/sync pin connect to GND via resistor, it will work in 2.1M/Auto mode/spread spectrum, right?
I have some questions about this
1. for fix 3.3V/5V version of LMQ62440-Q1, how to design FB pin circuit? float or connect to VOUT directly without resistor divider?
2. for LMQ62440-Q1, what's the fsw, is it fixed 2.1MHz or it is adjustable? if it is adjustable, how to adjust? for LM61435, it can be control by RT ?
3. for LMQ61440-Q1, if we want it work in 2.1MHz/FPWM/spread spectrum, how to design pin 6, does it need divider to meet mode_therhold voltage? can you give a reference ciruit?
thank you
