S-80820CLY-B-G

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The S-80820CLY-B-G PMIC Supervisors are an integrated voltage supervisor ideal for processor reset and power sequencing applications. They integrate a precision power-on reset generator and programmable delay timer, which can be used to generate reset signals and thermal overload Sequence. The device has an on-chip power supply voltage detection circuit, with a selectable threshold voltage of 2.63V to 4.9V. It also provides monitoring of its inputs over a wide voltage range. The supervisor is available in a 3 mm × 3 mm QFN package and can operate over the extended temperature range of −40°C to +85°C.

The S-80820CLY-B-G PMIC Supervisors has several key features, including an on-chip precision voltage supervisory circuit with a wide selectable input range, separate reset and power-good outputs, watchdog reset, programmable reset and power/reset redrivers, shut down inputs, and tamper resistance. Its reset and power-good outputs are configurable, providing latch or assertion types, optimized for both low power and robust systems.

The S-80820CLY-B-G PMIC supervisors have a wide range of applications, including notebooks and tablets, server motherboards, computing platforms, embedded systems, and industrial automation. They are designed to allow system designers to optimize the power sequencing during boot and shutdown operations and to reduce system faults by resetting the processor when the power-on reset fails. Additionally, the power-on reset output can be used to control a number of external components, such as memory chipsets and fan controllers.

The working principle of the S-80820CLY-B-G PMIC Supervisors involves monitoring the power supply voltage and outputting an appropriate voltage which is used to generate the reset signal. The voltage detection circuit has a wide input range, which can be configured to detect voltages above a specific threshold. When the input voltage is above the threshold, the output circuit generates a reset signal, which is used to reset the processor and other peripherals. The reset signal is then monitored and the system can be shut down according to the programmable thresholds. The reset signal can also be used to activate the power redrivers when an overload condition occurs.

In addition, the S-80820CLY-B-G PMIC Supervisors also provide a watchdog timer to detect system or application hang-ups. The watchdog timer is triggered when the system is not responding and a signal is sent to the supervisor to reset the system. Additionally, the S-80820CLY-B-G PMIC Supervisors is capable of detecting tamper events by measuring variations of the power supply voltage and comparing it to a predefined threshold. This allows the device to detect any attempted modification of the system and take appropriate steps to shut down the system.

The S-80820CLY-B-G PMIC Supervisors are designed to provide a reliable and robust power reset system. Its wide input range and configurable delay timer are effective in reducing system failure during reset and power sequencing operations. The watchdog timer and tamper detection features offer additional safety and make the device suitable for mission-critical operations.

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