Buck and boost regulator using LM2578A

LM2578A can be used to make Buck and Boost regulator.

Buck or step down regulator

 

buck

Vin = 15V
Vo = 5V
Io = 350 mA

Parts Lists

  1. R1 = 40 kΩ
  2. R2 = 10 kΩ
  3. R3 = 0.15Ω
  4. C1 = 1820 pF
  5. C2 = 220 μF
  6. C3 = 20 pF
  7. L1 = 470 μH
  8. D1 = 1N5818/IN5819

Boost or step up regulator

boost

Vin = 5V
Vo = 15V
Io = 140 mA

Parts List

  1. R1 = 140 kΩ
  2. R2 = 10 kΩ
  3. R3 = 0.15Ω
  4. R4 = 200 kΩ
  5. C1 = 1820 pF
  6. C2 = 470 μF
  7. C3 = 20 pF
  8. C4 = 0.0022 μF

You can use the above circuit drive series of LED and make an LED driver circuit using this.