S-80134CNPF-JKTTFU

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PMIC (Power Management Integrated Circuit) is one of the key components in modern electronic systems, responsible for the power supply of all kinds of circuits, providing a steady voltage supply. Supervisors are an essential part of the PMIC, monitoring the power input and output to ensure the system remains in stable operating conditions and take appropriate actions if it’s not the case. One of the most reliable solutions in this field is the S-80134CNPF-JKTTFU supervisor. This article will provide an overview of the application and working principles of this component.

Overview

The S-80134CNPF-JKTTFU is a voltage supervisor, designed to monitor low-voltage buses in embedded systems. It features a low activation voltage and fast rising edge detection perfect for applications where low voltage is present. It integrates a programmable time delay, allowing for a user-defined response time for generating the reset signal. This component is optimized for dynamic power management, and it has integrated ESD protection for supply and output for reliable operation.

Key Features and Specifications

The S-80134CNPF-JKTTFU offers several features and benefits to match its applications. Its main features include:

• 2.1V to 5V supply voltage operation
• Low operating current (<50nA)
• High threshold accuracy (±0.75%)
• Configurable time delay
• ESD protection on both supply and output
• Small outline (SOIC-8) package

The component also has several useful specifications. Its typical activation voltage range is 2.42V to 4.62V, and its reset time (tRESET) is 30 to 80 µs. Its threshold voltage(VTH) is programmable from 0.05V to 0.90V, and it is temperature compensated. Its current limit is 928 µA and its rise/fall times are 4.5/1.5±0.5 µs.

Application Fields

The S-80134CNPF-JKTTFU is a highly versatile component and can be used in many different scenarios. Some of the potential applications include:

• Voltage monitoring in Cell phone CPUs
• Supply monitoring in microprocessors
• Supply sequencing and failure detection
• Dynamic power management in power-efficient designs

In all these scenarios, the component offers reliable operation in low voltage environments and its integrated features provide efficient power consumption.

Working Principle

The S-80134CNPF-JKTTFU is a combination of two voltage comparators and an adjustable delay circuit. The first comparator is designed to detect a lower threshold voltage (VTH), while the second is designed to detect an upper threshold voltage (VTH+VHYST). Between them, the adjustable delay circuit provides a programmable time delay, which is used to set the amount of time the output is held low after the upper threshold is detected.

When in operation, the component monitors the input voltage and compares it to the two threshold values (VTH and VTH+VHYST). If the voltage is equal or below the lower threshold value (VTH), the output is low and remains low as long as that condition is met. If the voltage rises above the lower threshold (VTH) but is still below the upper threshold (VTH+VHYST), the output remains low but the delay circuit is activated.

When the voltage rises above the upper threshold (VTH+VHYST), the output goes high, and the delay circuit starts running. Once it runs for the programmed time delay, the output goes low again and the cycle starts from the beginning. If the voltage remains above the upper threshold (VTH+VHYST) for longer than the delay time, the output remains high.

The S-80134CNPF-JKTTFU also offers two hysteresis options, which can be selected using the HYST pin. This allows the user to easily adjust the hysteresis between the two threshold voltages (VTH and VTH+VHYST). These two hysteresis options are useful for providing better noise immunity and preventing false triggering caused by voltage spikes or other noise sources.

Conclusion

The S-80134CNPF-JKTTFU is a feature-packed, low-cost supervisor perfect for reliable voltage monitoring in low-voltage bus designs. It can be used in a wide variety of applications, from dynamic power management to supply sequencing and failure detection. Its built-in features and adjustable delay provide additional flexibility and ease of use, making it an ideal choice for embedded systems.

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