XC6123D628MR-G

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The XC6123D628MR-G is an ultra-low current, high performance CMOS supervisory circuit specifically designed to monitor power supplies, circuit functions, and provide system reset control. It is designed to ensure high reliability and reduce noise in the system. Its integrated low current reset capacitance and watchdog circuit give it excellent noise and reset characteristics. It also has an integrated low voltage detection circuit that provides high accuracy of voltage detection.

Application Field

The XC6123D628MR-G was designed to be used in battery powered or portable applications, such as mobile phones, tablet computers and portable internet devices. It is also commonly used in other types of embedded systems, such as home appliances, modems, set-top boxes, automotive and industrial equipments. This supervisory circuit ensures reliable system power control and long term stability.

Working Principle

The XC6123D628MR-G performs two main functions. The first is the voltage regulation of the power supply, which allows for a more stable operation of the system by preventing large fluctuations in the power supply voltage. The second function is to monitor system activity and generate a reset signal when a preset time is exceeded, or when the voltage falls below or exceeds preset limit. In addition, the circuit also provides overvoltage protection and reverse current flow protection.

During normal operation, the supervisory circuit monitors the system supply voltage and outputs a low active reset signal when the voltage falls below or exceeds preset limits. When the voltage falls below the preset limit, the circuit activates a reset signal, preventing the system from accessing a voltage that would be too low for operation. The reset signal can be programmed as either a pulse or as a continuous signal.

The circuit also contains an on-chip watchdog timer that generates a reset signal when a set time has been exceeded. During normal operation, the timer is automatically reset each time during the power-up sequence. This ensures that the timer is not activated prematurely, and that if the system does not perform the intended operations, the timer will activate a reset signal.

The circuit also includes an overvoltage protection feature. This feature monitors the supply voltage and limits the output to an upper limit in order to protect the associated system or circuit from excessive supply voltages. The overvoltage protection circuit is typically configured to cut-off power when the input voltage reaches 95% of the rated supply voltage.

The XC6123D628MR-G also provides reverse voltage protection, which prevents current from flowing back into the power supply. This protection feature functions by stopping the output voltage from sinking lower than the predefined threshold. This ensures that the power supply is not damaged by excessive reverse current.

The XC6123D628MR-G also provides an on-chip power-on reset circuit, which resets the system when the power supply is connected and a preset voltage is detected. This feature ensures that the system begins up correctly, and that the reset signals are generated in the correct order. The reset signal can be programmed for an active-low or active-high reset.

The XC6123D628MR-G also contains on-chip voltage detection circuits, which allow the system to monitor system voltages and power supply voltages. This allows the circuit to detect changes in the supply voltages, which can indicate that either the voltage is too high or too low. The voltage detection circuits also allow the circuit to enter low-power states, allowing for improved power efficiency.

The XC6123D628MR-G provides an extremely low supply current of only 0.2μA, making it an ideal choice for battery powered applications. The chip also features a wide range of features such as an adjustable reset timeout and voltage detection accuracy of 0.2%. Additionally, the XC6123D628MR-G is highly reliable, with a typical 3750V ESD rating for the power supply and reset lines.

The XC6123D628MR-G is a very reliable, high performance supervisory circuit designed for use in battery powered or portable equipments. It offers a wide range of features, including low power consumption, integrated voltage detection circuit, power-on reset circuit, watchdog timer, overvoltage protection and reverse current protection. The XC6123D628MR-G is an ideal choice for reliable system power control and long term stability.

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