TLC7701QPWG4

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The TLC7701QPWG4 is a precision voltage supervisor, a type of switch mode power supply (SMPS) designed specifically for use in power management integrated circuits (PMIC) applications. It is designed to monitor the main power supply of the system, provide reset and other functions, and protect the system from over-voltage conditions. This application field and working principle of the TLC7701QPWG4 will be discussed in this article.

The TLC7701QPWG4 provides integrated voltage monitoring of the main power supply of the system. The TLC7701QPWG4 has an input voltage range of 2.8 V to 12 V, with a set point voltage range of 0.8 V to 18 V. It provides a very low quiescent current of 0.3 μA, making it suitable for use in power-sensitive applications. Additionally, the TLC7701QPWG4 has programmable reset delay, reset active level and retain cycle timer. These features allow the user to customize the TLC7701QPWG4 to meet their system requirements.

The TLC7701QPWG4 has an adjustable power-on reset (POR) delay timer. This POR delay timer is designed to ensure that the system enters a known state, even if the main power supply rises quickly. It is also designed to provide a "grace period" for the system to boot up before the output is enabled.

The TLC7701QPWG4 also features a retain cycle timer which is used to delay the POR signal until the main power supply stabilizes. This retain cycle timer eliminates any unintended resets caused by rapid changes in the main power supply. Additionally, the TLC7701QPWG4 can be configured to output a low active reset (LAR) signal, which is held low until the system enters a safe state. This provides improved system stability by eliminating any unintended resets due to noisy power signals.

The TLC7701QPWG4 also features adjustable over-voltage protection (OVP) delay. The OVP delay ensures that the system will not be affected by supply line transients, while still providing protection against any over-voltage conditions. This feature protects the system from damage due to over-voltage conditions, while providing improved system stability.

Finally, the TLC7701QPWG4 has a programmable watchdog timer. The watchdog timer is used to detect when the system is stuck in a soft reset loop, or when an unexpected event occurs. When the watchdog timer expires, it will activate the reset line and force the system to reboot. This helps to protect the system from any unforseen errors or malfunctions.

In conclusion, the TLC7701QPWG4 is a precision voltage supervisor designed specifically for use in PMIC applications. The TLC7701QPWG4 provides integrated voltage monitoring of the main power supply, as well as several other features such as adjustable POR delay, retain cycle timer, and adjustable OVP delay. Additionally, the TLC7701QPWG4 also features a programmable watchdog timer, which helps to protect the system from any unforeseen errors or malfunctions. With all of these features, the TLC7701QPWG4 is an ideal choice for use in PMIC applications.

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