78xx replacement (SD8942)

Shouding SD8942

Replace your old 78xx voltage regulators with this much more efficient pin-compatible buck converter.

78xx replacement (SD8942) 78xx replacement (SD8942)
78xx replacement (SD8942)
78xx replacement (SD8942) 78xx replacement (SD8942)
Efficiency test. 7805 replacement. Input: 12 V.
Max power: 11627 mW. Max efficiency: 93.2%.
Efficiency test. 7805 original (L78S05CV). Input: 12 V.
Max power: 7367 mW. Max efficiency: 42.1%.

Parameters:

  • Input voltage: 4.5 V – 16 V
  • Output voltage: selectable via resistors R1 and R2:
  • Output current: max 2 A
Input: 12 V - output: 5 V. Output voltage ripple @ 250 mA load.
Input: 12 V – output: 5 V. Output voltage ripple @ 250 mA load.

Materials on the topic

  1. Datasheet Shouding SD8942
  2. Datasheet STMicroelectronics L78S

Downloads

  1. Gerber.zip