Transcription of Low Drop-Out (LDO) Linear Regulators: Design ...
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Low Drop-Out (LDO) Linear Regulators: Design ...
1 IEEE Santa Clara Valley (SCV)Solid State Circuits SocietyFebruary 11, 2110 Edgar S nchez-SinencioTI J. Kilby Chair ProfessorAnalog and Mixed-Signal Center, Texas A&M UniversityLow Drop-Out (LDO) Linear Regulators: Design Considerations and Trends for High Power-Supply Rejection (PSR)Power Management Why do we need power management? Batteries discharge almost linearly with time. To optimize the charging of batteries to be safe and extend their life. Circuits with reduced power supply that are time dependent operate poorly. Optimal circuit performance can not be obtained.
– VREF is a Bandgap voltage which is also supplied by V BAT =V IN. 0 1 2 2 ... • Bandgap voltage reference ÎShould have high PSR • Stability and speed of the feedback loop ÎShould be assured under all load conditions • Choice of the capacitors …
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