Hello everyone ! So i need to drop voltage from 12V to 7V and at high currents (~4,5-5A). So i choose LM338T. Now i am reading datasheet and i have some misunderstands.
1. Datasheet - http://www.datasheetcatalog.org/datasheet2/d/0kd9k2u8d4eukh8rypa0g60wc4wy.pdf
So i am looking at page 7. 1.2V-25V Adjustable regulator and wanted to count Vout with different resistor value with this formula Vout=Vref(1+R2/R1)+Iadj*R2
Tryed to count maximum Vout value and i got nonsenses:
Vout=1.25V(1+5kohm/120ohm)+45uA*5kohm=~78.8V
How i need to properly count it with R1 value 100 Ohm and R2 x ohm find that 7V ?
1. Datasheet - http://www.datasheetcatalog.org/datasheet2/d/0kd9k2u8d4eukh8rypa0g60wc4wy.pdf
So i am looking at page 7. 1.2V-25V Adjustable regulator and wanted to count Vout with different resistor value with this formula Vout=Vref(1+R2/R1)+Iadj*R2
Tryed to count maximum Vout value and i got nonsenses:
Vout=1.25V(1+5kohm/120ohm)+45uA*5kohm=~78.8V
How i need to properly count it with R1 value 100 Ohm and R2 x ohm find that 7V ?
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