The AMS1117 is a positive low voltage dropout regulator; typical voltage dropout is only 1.2V at 1A. AMS1117 provides two versions: fixed and adjustable versions. VOUT has a tolerance of less than 1.5% for fixed versions 1.2V 1.5V, 1.8V, 2.5V, 3.3V, 5.0V and adjustable version or 2% output accuracy for fixed version 1.2V. 

The AMS1117 offers some key features include thermal shutdown and current limiting. It is suitable for all electronic products.

78LXX is three-terminal positive regulators.  One of these regulators can deliver up to 100 mA  of output current. The internal limiting and thermal  -shutdown features of the regulator make them  essentially immune to overload. When used as a  replacement for a zener diode-resistor  Combination, an effective improvement in output  impedance can be obtained, together with lower  quiescent current.

The AMS1117 is a positive low voltage dropout regulator; typical voltage dropout is only 1.2V at 1A. AMS1117 provides two versions: fixed and adjustable versions. VOUT has a tolerance of less than 1.5% for fixed versions 1.2V 1.5V, 1.8V, 2.5V, 3.3V, 5.0V and adjustable version or 2% output accuracy for fixed version 1.2V. 

The AMS1117 offers some key features include thermal shutdown and current limiting. It is suitable for all electronic products.

The LM317 is an adjustable three-terminal positive voltage regulator with a very low dropout of 1.2V at 1.2A output current. Using 2 external resistors, the LM317 can provide an adjustable output voltage down to 1.25V. The LM317 includes a circuit of trimmed bandgap reference to assure output voltage accuracy to be within 1%. It also provides current limiting and thermal shutdown. The current limit is trimmed to ensure specified output current and controlled short-circuit current. The On-chip thermal limiting provides protection against any combination of overload and ambient temperature that would create excessive junction temperature.