SR1PBBU Integrated Circuits (ICs)

Series:	Smart Reset™
Packaging:	Tape & Reel (TR)
Part Status:	Active
Type:	Reset Timer
Number of Voltages Monitored:	1
Output:	Open Drain or Open Collector
Reset:	Active Low
Reset Timeout:	240 ms Minimum
Voltage - Threshold:	Adjustable/Selectable
Operating Temperature:	-40°C ~ 85°C (TA)
Mounting Type:	Surface Mount
Package / Case:	6-UDFN
Supplier Device Package:	6-UDFN (1.45x1)

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Introduction

Supervisors are power management integrated circuit (PMIC) circuits responsible for protecting and monitoring circuits from overvoltage and under-voltage conditions. They limit the voltage supply to a microcontroller or processor, providing it with a safe operating environment. The SuperVision family of supervisory circuits is one such type, consisting of devices in the SR1P and BBU range. This article provides a brief overview of the SR1PBBU application field and its working principle.

Field of Application

The SR1PBBU range of devices are targeted towards products that require redundancy and improved system reliability. Particularly, they serve as a good fit for IoT edge computing, next-generation autopilot, and autonomous car applications. These integrated circuits feature lower current consumption, improved reliability, and enhanced accuracy. The SR1PBBU family is comprised of three main categories of Supervisors: the SR1P regulator, SR1PBBI buffer, and SR1PBBO buffer. The SR1P regulator provides a fixed voltage from 2.6V to 5.5V and has two outputs: an adjustable voltage, and a fixed output. The SR1PBBI buffer provides a fixed output voltage, while the SR1PBBO buffer provides an adjustable output voltage. The SR1P, SR1PBBI and SR1PBBO supervisor circuits come in a variety of packages, with a maximum voltage rating of 7V, and a maximum operating temperature of 85° C. The maximum input voltage for the SR1P supervisor is 7V, and it can tolerate an input voltage range from 2.6V to 7V, making it suitable for a wide range of devices. The SR1PBBI and SR1PBBO buffers can accept input voltages from 4.2V to 7V.

Working Principle

The SR1PBBU family of supervisors works by monitoring the input voltage, and applying voltage regulation if the input voltage exceeds the set limit. The SR1P supervisor, for example, features a comparator module which is powered by the input voltage, and compares it to the reference voltage. If the input voltage is above the reference, the comparator module outputs a signal to the gate driver and MOSFET, which then switches off the regulator and cuts the input voltage supply. The SR1PBBI and SR1PBBO buffers then take the incoming voltage and reduce the voltage output to a voltage level that is lower than the input voltage, in order to provide a safe voltage supply to the connected device. The SR1PBBI and SR1PBBO buffer can be configured to provide a variety of output voltages, from 1.2V to 5.5V, depending on the input voltage and load requirements. The SR1PBBU family of Supervisors is designed for robust performance and reliability. They feature a wide operating temperature range of -40°C to 85°C, giving them the capability of working in harsh environments. The SR1P, SR1PBBI, and SR1PBBO circuits also feature low quiescent current consumption, reducing the power consumption of the device and prolonging battery life.

Conclusion

The SR1PBBU family of Supervisors provide a reliable and efficient power management solution, with superior performance and improved accuracy. They feature a wide voltage range, low power consumption, and high accuracy, making them well suited for applications where reliability and system redundancy are necessary. The SR1PBBU family also features an extensive operating temperature range, making them suitable for use in harsh environments.

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