The "78M09" and "7809" are both common designations for a positive voltage regulator IC that provides a fixed output voltage of 9 volts. These voltage regulators are part of the 78xx series of voltage regulators, which are widely used in electronic circuits to provide a stable and regulated voltage supply. These voltage regulators offer on-card regulation, addressing issues related to centralized regulation. They all feature built-in current limiting, thermal shutdown, and safety mechanisms, which greatly enhance their durability. With proper heat dissipation, they can provide an output current exceeding 0.5 amperes. While originally intended for fixed voltage applications, these components can be customized for variable voltage and current settings through the use of external components.
- Its output current is 0.5A
Thermal overload protection
Short circuit protection
Output transition SOA protection