The 7805 IC or 5V regulator has a maximum current of 1.5A. By adding transistor and resistor, you can increase its current capacity. The circuit below can deliver a current up to 5A at a regulated 5V supply, with just minimal modification.

Power supply schematic diagram |

R - 4.7 ohms resistor 1/2W

Q - MJ2955 or similar power PNP transistor

C1 - 22uF rated 16V (must be higher if DC is unregulated)

C2 - 22uF rated 10V (optional)

Fuse – 6 Amps rated fuse or near values

DC – 9V to 15V dc supply

7805 regulator IC

Part list diagram: click pictures to enlarge

7805 pinouts |

MJ2955 pinouts |

High current 5V schematic diagram |

Hi friend,

ReplyDeletei want 6v 5amp minimum using 7806

Regards,

SANJEEVI