Looking for power management solution for following
Vin range (dc) 18V to 30V
Vout = 28V
Iout = 0.5A
1) Improve efficiency >80%
2) small footprint
Have a look at the ADP1621in the SEPIC configuration or the ADP1614 in the SEPIC configuration. Also, if your were not aware, we have this fantastic design tool called ADIsimPower. It is really simple to use, and they are excel based. See the links below.
ADP1621 Coupled-SEPIC Design Tool
ADP161x Coupled-SEPIC Design Tool
I did a quick design with both the ADP1621 and ADP1614. I have attached the design outputs for each. You can use the tool and change the components to customize your design. Please check them out.
Retrieving data ...