XC6121D446ER-G

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PMIC - Supervisors

The XC6121D446ER-G is a digitally enhanced low-saturation single-channel supervisory integrated circuit (IC) used in various applications that require monitoring, resetting, and power-on reset (POR) control. The XC6121D446ER-G provides excellent protection against system overvoltage conditions, and it is suitable for monitoring supplies ranging from 1.6V to 11V.

Application Field

The XC6121D446ER-G plays an important role in battery-powered and portable electronic systems, such as computers, notebooks, tablets, gaming consoles, and smartphones. It is designed to monitor voltage levels and issue reset pulses to initiate a system reset under predetermined conditions. It can also be used for thermal management, as it can monitor thermal parameters and issue reset commands when the temperature rises too high. Additionally, the IC can be used for automotive applications, such as ABS control systems.

Features

• Wide operating supply voltage range (1.6V to 11V).
• Very low operation current required, with at most 25uA.
• A low-saturation voltage of 0.9V.
• Different reset thresholds levels ideally suited for automotive applications.
• Ability to control the reset output with a programmable reset threshold using an external resistor.
• Wide temperature range of -40°C to 85°C.
• Reliable protection against system overvoltage conditions.
• A POR signaling circuit, in order to monitor power-on reset.
• Cost effectiveness, with a low price per unit.

Working Principle

The XC6121D446ER-G monitors voltage and thermal parameters, and controls the reset output of the device. The level of voltage is compared with a preset threshold, referred as the “Output RESET Threshold”. When this threshold is exceeded, the device sends out a reset signal that is used to initiate a system reset and protect the system against overvoltage or overheat conditions.

The POR signaling circuit of the XC6121D446ER-G is designed to monitor the power supply voltage during power-on reset of the system. When the VCC power supply voltage rises above the programmable threshold, the reset is removed, and the device continues with the normal operation.

To set the reset threshold level, an external resistor between the RST signal and ground is used. By varying this resistor, a voltage range can be established where the RST signal will be kept low, unless the threshold is exceeded.

In addition, the XC6121D446ER-G is equipped with output drivers in order to operate the system reset signal, which can be enabled or disabled by setting the enable pin. This allows for efficient power management, enabling systems to behave differently in normal operation and system reset operation.

Conclusion

The XC6121D446ER-G is an exceptionally versatile and cost-effective device. Its wide operating voltage range, wide temperature range, low-saturation voltage, and efficient reset control make it an ideal choice for various applications. This device can be used to protect systems from voltage and temperature abnormalities, and to reset systems during power-on sequences. In sum, its sophisticated circuitry and reliable performance make the XC6121D446ER-G a great choice for designers.

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