Hi!
I have a design where I use 2 MP2459 with the enable pin connected to the same voltage divider.
My problem is the voltage needs to reach above 1.58V before the DCDC start.
The datasheet said 1.2V/1.35v. Any idea why it has to go so high at 1.58V?
My input voltage range is 9V to 36V, so I need the DCDC to turn on before 1.5V to respect the 6V upper limit.
I can share in private the schematics and PCB layout.
Thanks
Hello,
The 1.5V is likely including the enable hysteresis.
You can the resistive divider based on your lowest input voltage to ensure it starts up.
Best Regards,
Yu