Designer’s Guide Community

‹ Previous topic | Next topic ›

Pages: 1

Low Dropout Voltage Regulator Circuit Design (Read 2638 times)

Crow

New Member

Offline

Posts: 1

Low Dropout Voltage Regulator Circuit Design
Jan 04^th, 2015, 7:39am

Good day.

I was hoping that you would be able to help me understand some of the values in these formulas i came across. We're designing an LDO for the first time (please help :-[ ). These are some of the formulas used for the first two stages of the circuit.
I was wondering, how does one get the values for K'5, K'3, K'1, Vin(max), VT1(min), VT1(max) and for the different lambda?
And perhaps the 1, 3 and 5 indicates the number of the certain transistor in the design? These formulas are for the OpAmp part of the LDO.
Thank you for your help ;D

formulas.png

IP Logged

loose-electron Senior Fellow Offline Best Design Tool = Capable Designers Posts: 1638 San Diego California	Re: Low Dropout Voltage Regulator Circuit Design Reply #1 - Jan 19^th, 2015, 1:22pm your question is not understandable in the form presented. Schematics, diagrams of where all this is in the system would be needed as part of the question.
Back to top	Jerry Twomey www.effectiveelectrons.com Read My Electronic Design Column Here Contract IC-PCB-System Design - Analog, Mixed Signal, RF & Medical IP Logged

raja.cedt Senior Fellow Offline Posts: 1516 Germany	Re: Low Dropout Voltage Regulator Circuit Design Reply #2 - Jan 19^th, 2015, 4:39pm I guess these formulas are from allen holberg book, so you find there only. you could have show schematic at least....
Back to top	IP Logged

Pages: 1

‹ Previous topic | Next topic ›