MAX6772TALD2+T Datasheet/PDFPMIC - Supervisors
The MAX6772TALD2+T is a dual-channel supervisor and reset IC from Maxim Integrated. It includes two independent power-on reset (POR) circuits. It is designed to monitor the power supply voltage of two separate power sources and generate a reset signal when the applied voltage falls below the factory-programmed user-specified lower threshold. The MAX6772TALD2+T is widely used in multiple application fields such as anything from consumer and automotive applications to cell phones and gaming consoles. This article will explore the applications of the MAX6772TALD2+T and its working principle.
Applications of MAX6772TALD2+T
One major application field of the MAX6772TALD2+T is home appliances and consumer electronics. It is often used to monitor the power supply of a device, such as a toaster, and generate a reset signal in case of a power outage. This prevents the device from malfunctioning and potentially damaging itself or its surrounding environment.
The MAX6772TALD2+T is also used in automotive applications. It is used to monitor the voltage in internal systems such as digital cluster, HVAC and body control modules. When the voltage falls below a user-specified lower threshold, the supervisor generates a reset signal to help maintain system reliability.
The MAX6772TALD2+T is also widely used in portable electronics, including cell phones, tablets, and gaming consoles. A supervisor is essential in portable electronics as it helps to prevent problems such as over heating or excessive power usage. In gaming consoles, the supervisor monitors the power supply to the processor, memory and other components. When the power supply falls below a certain level, the supervisor will generate a reset signal to prevent the system from crashing.
Working Principle of MAX6772TALD2+T
The MAX6772TALD2+T is designed to monitor the power supply voltage and generate a reset signal when the voltage falls below the user-specified lower threshold. The supervisor has two independently adjustable power supply thresholds. The first threshold is the upper limit, or reset-active (RA) threshold. Once the voltage on the power supply rises above the RA threshold, the supervisor will generate a reset signal. The second threshold is the lower limit, or reset-inactive (RI) threshold. When the voltage on the power supply falls below the RI threshold, the reset signal is removed and the reset output is set low.
When the MAX6772TALD2+T supervisor is in operation, the pin current should remain constant. To prevent false triggering of the reset signal, the supervisor incorporates a hysteresis feature. This feature ensures that once the voltage falls below the RI threshold, it needs to rise above the RA threshold before the reset signal is generated, preventing false triggering of the reset signal.
The MAX6772TALD2+T also features a watchdog timer to monitor system activity. If the system does not respond to the watchdog timer, it will generate a microprocessor reset to help prevent system-level issues. The watchdog timer is adjustable, thereby allowing the user to easily set the reset timeout period. In addition, the MAX6772TALD2+T also incorporates a warm-up timer that delays the reset signal for up to 5 minutes when the power supply initially turns on.
Conclusion
The MAX6772TALD2+T supervisor from Maxim Integrated is a dual-channel power on reset IC. It is widely used in multiple application fields, including consumer and automotive applications, to help maintain system reliability by generating a reset signal when the power supply voltage falls below the user-specified threshold. In addition, it also incorporates a watchdog timer and a warm-up timer to provide extra protection against system-level issues.