XC6121C335MR-G

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Supervisors are power management integrated circuit (PMIC) devices that protect system microprocessors (μPs) against unsafe conditions such as brown-outs (voltage drops) or power-on reset (POR). These devices monitor system conditions and reset the μPs when they become unavailable. There are many different types of supervisors, each optimized for certain applications and specific power requirements. The XC6121C335MR-G is a different type of supervisor device from Excess Semiconductor.

Overview

The XC6121C335MR-G is a low power, low dropout (LDO) regulator supervisor. It provides precision overvoltage and undervoltage protection for main power rails, as well as a kill power feature for secondary power rails. The LDO regulator provides excellent transient response, and the device includes voltage detection with delay. In addition, the XC6121C335MR-G also provides an open drain output that can be used to reset a microprocessor.

Applications

The XC6121C335MR-G supervisor is designed primarily for use in embedded system applications, where it can provide protection against power supply voltage drops and increases. It is well-suited for protecting system microprocessors, but it can also be used to protect other devices such as peripheral components.

The XC6121C335MR-G is well-suited for automotive, industrial, and consumer applications, and has been tested and certified for compliance with automotive Specifications AEC-Q100 and SSO-217. It is ideal for applications that require reliable and robust voltage protection, such as power management, data acquisition, and system control.

Features

The XC6121C335MR-G\'s features include:

• A low input voltage operating range from 0.45V to 4.5V.
• A 0.3V typical dropout voltage.
• Precision voltage detection with delay.
• Overvoltage and undervoltage protection.
• Open drain output with reset capability.
• Kill power feature for secondary power rails.
• Integrated load switches.
• Low quiescent current of only 8μA.

Pinout

The diagram below shows the pinout of the XC6121C335MR-G supervisor:

Working Principle

The XC6121C335MR-G supervisor monitors the voltage on the two main power rails (VREG1 and VREG2) and compares them to a set threshold. If the voltage drops below the threshold, the supervisor issues a reset and shuts off the secondary power rails to ensure that the system does not experience any overvoltage or undervoltage conditions.

The XC6121C335MR-G also features an open drain output with reset capability. The open drain output can be used to reset the microprocessor when the reset threshold is reached. In addition, the integrated load switches can be used to control power to external components.

Conclusion

The XC6121C335MR-G supervisor from Excess Semiconductor is a low power, low dropout regulator supervisor designed for use in embedded system applications. It provides precision overvoltage and undervoltage protection for main power rails, as well as a kill power feature for secondary power rails. It also features an open drain output with reset capability and integrated load switches.

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