I have some questions about LTC3421 boost up DC/DC.
Could you please give me any advice?
1. How to adjust output voltage
I think I should calculate with two resistors connected FB pin to adjust output voltage, but I couldn't find formula to calculate output voltage in the datasheet of LTC3421.
2. Absolute maximum value of NMOS current and PD
I also would like to know absolute maximum of NMOS current and power dissipation.
How can I know the limit of switch current in my application?
Here is specification of my application.
VIN min : 1.2V
VIN max : 3.0V
VOUT : 4.5V(or 5V)
IOUT max : 500mA
I've confirmed by simulation of LT Spice that 5V/500mA output from 1.2V Input will steady. but in that situation, Input current is about 3.2A.
Thank you in advance for your help.