ISL8701IBZ

Series:	--
Packaging:	Tube
Part Status:	Obsolete
Type:	Sequencer
Number of Voltages Monitored:	4
Output:	Open Drain or Open Collector
Reset:	Active High/Active Low
Reset Timeout:	Adjustable/Selectable
Voltage - Threshold:	Adjustable/Selectable
Operating Temperature:	-40°C ~ 85°C (TA)
Mounting Type:	Surface Mount
Package / Case:	14-SOIC (0.154", 3.90mm Width)
Supplier Device Package:	14-SOIC
Base Part Number:	ISL8701

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Introduction to PMIC- SupervisorsPower management integrated circuits (PMICs) are a type of semiconductor chip that integrates circuits for powering and managing various electrical loads, usually in a very small form factor. PMICs are typically used in applications such as computers, mobile phones, smartphones, portable electronics, navigation systems, lighting, and industrial and automotive applications.PMICs come in different types, and one of the main types is supervisors. A PMIC-Supervisors is a PMIC specifically designed to provide precision regulation of a systems power supply and to detect, monitor, and protect the embedded processor and other system components from power related risks.Two of the most common types of PMIC-Supervisors are Programmable Voltage Monitors (PVMs) and Voltage Hold Monitors (VHMs). PVMs are used to provide programmable reference voltage, while VHMs provide a safe and configurable minimum supply voltage.This article focuses on the ISL8701IBZ, which is a dual-channel, high-precision, low quiescent current Programmable Voltage Monitor. It is optimized to provide protection and precision power sequencing for microcontrollers and other system components in battery-powered applications.Working Principle of ISL8701IBZThe ISL8701IBZ is a programming voltage monitor designed for use in applications that require ultra-low power and high accuracy. This device uses an on-chip voltage reference to detect when the system voltage is out of the range determined by two pre-programmed threshold values. If either the high or low threshold is exceeded, the ISL8701IBZ will output an active-low flag signal to indicate a violation.The ISL8701IBZ is designed to be operated from a single 3.3V or 2.5V supply, and it has two independently programmable thresholds, VMEAS and VLIMIT, with a minimum difference of 0.5V. VMEAS is the upper threshold reference, while VLIMIT is the lower threshold reference. In addition, the ISL8701IBZ has a watchdog timer which can be used to monitor the system’s processor activity.When the voltage at the system’s power supply is within the defined range, the ISL8701IBZ will generate a low state at its active-low flag signal output. If the system’s voltage exceeds the upper threshold, VMEAS, the ISL8701IBZ will generate a high state at its active-low flag signal output to indicate a violation.In addition, the ISL8701IBZ also provides an integrated watchdog timer that is used to monitor system processor activity. The watchdog timer (WDT) has a programmable start time and end time. The WDT can be configured to reset the system at regular intervals or when the system is idle.Application of ISL8701IBZThe ISL8701IBZ has a wide range of applications, including power supplies, servers, circuit boards, portable medical devices, and automotive applications. The ISL8701IBZ is used to create a system power supply that is reliable and cost-effective. Its ultra-low quiescent current and precision regulation make it ideal for battery-powered applications.The ISL8701IBZ’s programmable voltage monitor and watchdog timer can be utilized to protect the system from overvoltages and inactivity, respectively. The WDT is designed to reset the system after the system has been inactive for a certain amount of time, keeping the system operable and avoiding any unwanted safety issues due to inactivity.ConclusionThe ISL8701IBZ is an ultra-low quiescent current, high-precision, programmable voltage monitor. It has a wide range of applications, including servers, portable medical devices, and automotive applications. The ISL8701IBZ provides precision regulation and protection of the system’s power supply, as well as a programmable watchdog timer to monitor processor activity and reset the system if it is inactive for too long.

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