L9678 Datasheet/PDFL9678 is an interface circuit that enables a dedicated power supply subsystem to control the main system voltage. The voltage control loop is used to regulate the output voltage as a function of the original power supply error signal. This integrated circuit is optimized for system power solutions that use a single processor, as it provides precise voltage regulation using low noise detection and low voltage headroom.
The L9678 operates in two different modes: normal mode and standby mode. During normal mode, the L9678 senses the error signal from the main power supply controller and then uses it to control the output voltage. On the other hand, during standby mode, the circuit uses a different voltage control method that is optimized for low system standby current. The L9678 also includes additional features such as soft start, over voltage detection and automatic voltage reduction.
The main application of the L9678 is to provide a precise voltage control solution for system solutions that use a single processor. It works by sensing the error signal, which is typically generated by the main power supply controller, and then using it to control the output voltage. To ensure the maximum accuracy and stability of the system, the circuit provides highly accurate overvoltage and undervoltage protection.
The L9678 is optimized for low voltage, low noise detection and low headroom operation, so it does not consume a lot of power. In addition, it is designed for low noise operation and require minimal external components for operation. The L9678 also has an adjustable watchdog timer to monitor the system, and it can also be used in multiple configurations for increased flexibility.
The L9678 is an efficient and reliable interface circuit for single processor applications. It is used to provide precise voltage control solutions and requires minimal external components for operation. Additionally, it offers low noise detection, low voltage headroom operation and an optional watchdog timer for system monitoring. Together with its high accuracy, stability and robust performance, the L9678 is an ideal choice for system solutions that require precise voltage regulation.