VOLTAGE REGULATORS

LECTURE 19

LINEAR POWER SUPPLY

YOU TUBE: Voltage regulator tutorial & USB gadget charger circuit http://www.youtube.com/watch?v=GSzVs7_aW-Y

2 3

120VAC

7805

5VDCOUT

7805 VOLTAGE REGULATOR 5VDC

120

http://www.youtube.com/watch?v=IjJWWGPjc-w

LM317 Adjustable Voltage Regulator Tutorial

The output voltage of the LM317T is determined by ratio of the two feedback resistors R1 and R2 which form a potential divider network across the output terminal as shown below.

Adjustable Regulator

Variable Voltage Power Supply

LM 317 PACKAGE STYLES

DIFFERENT PACKAGE TYPES FOR THE LM317

TYPICAL HEAT SINK FOR POWER TRANSISTORS/VOLTAGE REGULATORS

UTILITIY SUBSTATION POWER SUPPLY