The AS78L18Z-E1 is a three-terminal positive voltage regulator manufactured by BCD Semiconductor Manufacturing Limited. As an End-of-Life (EOL) component, it is no longer in active production. This regulator was designed to provide a fixed 18V output voltage with a low dropout voltage. It is suitable for a wide range of applications requiring a stable 18V supply.

Applications

• Linear power supplies
• Regulation for microcontrollers
• Powering sensors and transducers
• Battery chargers
• General purpose voltage regulation

Features

• Fixed 18V output voltage
• Low dropout voltage
• Short-circuit protection
• Thermal overload protection
• Three-terminal package

Benefits

• Provides a stable and precise 18V output voltage
• Maintains regulation even with low input voltage
• Protects the regulator and connected circuits from short-circuit conditions
• Prevents damage due to overheating
• Simple and easy to use with a three-terminal configuration

Additional Details

The AS78L18Z-E1 requires minimal external components, making it easy to implement in various circuits. It typically operates with an input voltage range slightly above 18V. The low dropout voltage ensures that the regulator can maintain its output voltage even when the input voltage is close to the output voltage. The integrated short-circuit and thermal overload protection enhance the reliability and robustness of the regulator. It is packaged in a small through-hole or surface-mount package, making it suitable for space-constrained applications. The output current is typically limited to around 100mA. As an End-of-Life (EOL) component, replacement or alternative solutions may be necessary for new designs. The operating temperature range generally spans from -40°C to +125°C. Proper heat sinking might be required depending on the input voltage and output current conditions. The datasheet provides detailed electrical characteristics and thermal information, which are essential for designing reliable circuits.