Question

what are the advantages of Linear versus buck-boost regulator.

Answer 1

Ans)

Linear Regulator	Buck-boost Regulator
Low or no ripple, low noise, better noise rejection	Medium to high noise, due to ripple at switching rate
Low cost	Medium to high cost , largely due to external components
Low complexity, usually require only the regulator and low value bypass capacitors	Medium to highly complex, requires inductor, diode, and filter capacitors in addition to the IC; for high-power circuits, external FETs are needed
Its disadvantage is only steps down (buck) so input voltage must be greater than output voltage	Where as this regulator Step up (boost), step down (buck), inverts
Another disadvantage is low to medium efficiency	High efficiency, except at very low load currents
Small to medium in size portable designs, but may be larger heatsinks is needed depends on power rating	Larger than linear at low power, but smaller at power levels for which linear requires a heat sink