S-80840CNPF-B8ZTFU

Series:	S-808xxC
Packaging:	Tape & Reel (TR)
Part Status:	Active
Type:	Voltage Detector
Number of Voltages Monitored:	1
Output:	Open Drain or Open Collector
Reset:	Active Low
Reset Timeout:	--
Voltage - Threshold:	4V
Operating Temperature:	-40°C ~ 85°C (TA)
Mounting Type:	Surface Mount
Package / Case:	4-SMD, Flat Leads
Supplier Device Package:	SNT-4A

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Power management integrated circuits (PMICs) are an important component of many electronics devices, from desktop computers to mobile phones, and are instrumental in optimizing power efficiency. The S-80840CNPF-B8ZTFU is an example of a PMIC, specifically a so-called supervisor IC, which helps to regulate power supply, monitor power states, switch power sources, and guard against system malfunctions. This article will explain the application field of this IC and its working principle.

Application Field

The S-80840CNPF-B8ZTFU is designed for use in a variety of applications that require accurate supervision of power supply and monitoring of power states. This IC can provide thermal control, voltage control, and input/output signal monitoring for applications such as automotive electronics, industrial systems, communications and medical equipment. The IC is specifically used in applications that require signal management on power up and hot insertion. Its wide input voltage range from 2.7V to 5.5V allows its use in various voltage domains. Furthermore, the frequently used DeepSleep mode extends battery lifetime and makes the IC useful for power-constrained products or products that operate in low power mode for extended periods of time. The S-80840CNPF-B8ZTFU can also be used in embedded systems and distributed power systems. Embedded systems typically require a large number of control signals, and the IC is well suited to these applications. On the other hand, in distributed power systems the IC can be used to protect downstream components from effects of upstream system changes, such as excessive current or temperature changes.

Working Principle

At its core, the S-80840CNPF-B8ZTFU is designed to ensure regulators are operating safely and protect downstream circuitry from malfunctions or damage. The IC’s architecture consists of a supervisor that contains many blocks, the most important of which are the Status Register, the Sequence Block, and the Assertion/Deassertion Block. The Status Register keeps track of the power-on state and the sequence of operations commanded. It contains two memory-mapped registers that keep track of the status of different blocks, allowing the circuits supervised by the IC to load commands from them. The Sequence Block takes the commands from the status register and executes them sequentially. The sequence is programmed by loading sequences into the registers. Once the sequences are set, the Assertion/Deassertion Block will actuate the power down and up operations in line with the programmed sequences. The IC also contains a Timer Block, which contains preset delay times to be used by the supervisor. If a programmed circuit needs to delay more than the preset time, the supervisor will wait until it has completed before resuming its operation. In addition to these core blocks, the supervisor contains many other components, such as an internal embedded analog/digital converter, temperature shutdown circuitry, and power-on configuration registers.

The S-80840CNPF-B8ZTFU is an advanced supervisor IC that, thanks to its sophisticated architecture, is capable of protecting systems from malfunction and optimizing power efficiency. The IC is suitable for many different types of applications, from automotive electronics to power systems, and can extend battery lifetime in energy-constrained products. All the features of the IC are enabled by its comprehensive design, which centers around the Status Register, the Sequence Block, and the Assertion/Deassertion Block.

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