The KIA7809API-U/P is a three-terminal positive voltage regulator from KEC. It's part of the KIA78 series, known for providing a fixed 9V output voltage. This regulator is designed for a wide range of applications requiring a stable and regulated power supply.

Applications

• Power supply for microcontrollers
• Powering operational amplifiers
• Voltage regulation in audio circuits
• Battery chargers
• Instrumentation and measurement equipment

Features

• Fixed 9V output voltage
• Internal thermal overload protection: Prevents the device from overheating and being damaged.
• Short circuit current limiting: Protects the regulator and the load from excessive current.
• Output transistor safe area compensation: Ensures stable operation over a wide range of load currents and temperatures.
• High ripple rejection: Minimizes the impact of input voltage fluctuations on the output.

Benefits

• Stable and reliable 9V supply: Provides a consistent voltage for connected circuits.
• Simplified power supply design: Requires few external components.
• Built-in protection features: Enhances system reliability.
• Cost-effective solution: Offers a good balance of performance and price.
• Easy to use: Simple three-terminal configuration.

Technical Specifications

The KIA7809API-U/P accepts an input voltage range typically between 12V and 35V. It can provide an output current of up to 1A with adequate heatsinking. The operating temperature range is generally from -40°C to +125°C. It's commonly available in a TO-220 package for efficient heat dissipation. This regulator maintains a stable output voltage even under varying load and temperature conditions. The dropout voltage is typically around 2V, ensuring proper regulation even with a slightly lower input voltage.