HAISEN Switching Regulator IC Positive Fixed 5V Output 3A Step-Down Voltage Regulator TO-263 LM2576 LM2576SX LM2576SX-5.0 buy it!
$0.30-$6.00
LM317 Voltage Regulator LM317T Transistor IC LM317 Adjustable Power Supply Module DC-DC Converter Buck Regulator buy it!
$0.44-$0.68
L7805CV TO-220 three-terminal voltage regulator 5V/1.5A L7805CV IC 7805 buy it!
$0.01-$0.50
Alternator voltage regulator D30 VRD687 buy it!
$2.62
IC Chips Current Regulator WSON-10 TCKE812NA,RF
$1.56