AP431SRG-7

PMIC-Voltage References is a vital component of any power using system that directly affects the performance of the system at all ranges of its operating conditions. The AP431SRG-7 is a regulated programmable voltage reference designed to provide regulated power to critical components of the system. This device is specifically designed for the automotive applications and comes with wide operating temperature range.

AP431SRG-7 Features

The AP431SRG-7 is a three terminal programmable reference voltage device with a wide operating temperature range of -55 to +125°C and package size of SOT-23-5 allowing for small space design. Besides, it includes an integrated low drop out voltage regulator with adjustable output voltage from 0.9V to 5.5V, as well as temperature and line regulation functions. Additionally, it provides superior accuracy, low power dissipation and fast transient response.

AP431SRG-7 Applications

Due to its small size and low power dissipation, the AP431SRG-7 is ideally suited for a wide range of applications in the automotive industry. These include power supplies for 5V/12V DC-DC converters, digital audio amplifiers, power supplies for micro processers and controllers, as well as portable devices. Furthermore, it is suitable for power supplies used in solar energy and other low voltage applications requiring very tight regulation, such as LCD displays.

AP431SRG-7 Working Principle

The AP431SRG-7 working principle relies on two major components - low dropout voltage regulator and programmable reference voltage. The LDO voltage regulator is used to maintain the output voltage of the reference independent of the supply voltage, and also to reduce power dissipation. The programmable reference voltage controls the actual reference voltage being outputted. The device is capable of adjusting its output voltage from 0.9V to 5.5V in a range of 0.1V increments.

The AP431SRG-7 makes use of its integrated sensing circuit to automatically adjust its output voltage to maintain a stable output voltage under a wide range of operating conditions. This is made possible by the combination of the LDO voltage regulator and the programmable voltage reference. The internal sensing circuit is designed to vary the reference voltage output so that the voltage levels remain uniform regardless of the temperature or input line voltage.

The AP431SRG-7 also incorporates an internal temperature compensation circuit, which is capable of compensating the reference voltage based on the ambient temperature. This ensures that accurate and repeatable reference voltage is maintained over a wide temperature range for improved performance and product reliability.

In conclusion, the AP431SRG-7 is a compact and reliable voltage reference specifically designed for automotive applications. It provides superior accuracy, fast transient response and low power dissipation along with a wide operating temperature range, making it an ideal choice for a wide range of automotive applications. The working principle of this device is based on the combination of a low dropout voltage regulator and programmable reference voltage, which provides reliable and consistent performance in a broad number of applications.