XC6121A343ER-G

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The XC6121A343ER-G is a supervisory circuit with multiple voltage monitor functions. It is often used in applications of industrial, automotive and consumer electronics. The XC6121A343ER-G provides reliable supply voltage monitoring and controlling to protect against brown-out, over-voltage and under-voltage conditions.

Overview

The XC6121A343ER-G is a voltage supervisor device with a built-in 3V or 5V reference. It has two monitor outputs, MR (Monitor Reset) and MW (Monitor Warning), and two thresholds for detecting the voltage low limit (VL), and the high limit (VH). The supervisor also features an open drain output, which is activated by the monitoring function and an output enable function. The XC6121A343ER-G is available in a 6-pin SOT-89 package.

Features

The XC6121A343ER-G provides over-voltage/under-voltage protection, warning and reset functions. It is adjustable to 3.2V, 4V, 5.2V and 6V Voltage Monitor voltage levels, for low voltage and high voltage warning. Other features include:

• Wide Operating Voltage Range: 1.8V - 5.5V
• Low Current Consumption: 5uA (typical)
• Fast Response Time: 1ms (typical)
• Reverse Voltage Protection
• Over-Temperature Protection
• Open drain output for flexible system control

Applications

The XC6121A343ER-G is ideal for battery-powered mobile devices such as phone, tablet and laptop, consumer and industrial battery-powered equipment. It can detect early over-voltage/under-voltage conditions, allowing system shutdown before damages to major components occur. The XC6121A343ER-G can also be used in TV and Display systems, ATX power supply systems, Automotive, and SMPS power supplies.

Working Principle

The XC6121A343ER-G monitors the supply voltage, using it\'s 3V or 5V built-in reference, and activates the reset and warning outputs accordingly. The XC6121A343ER-G has two thresholds for detecting the voltage low limit (VL) and the high limit (VH). When the supply voltage falls below the low limit setting, the MR output will be activated and deactivated when the voltage returns to a safe level. The MW output is activated when the supply voltage is higher than the high limit, and will reset when the voltage returns to a safe level.

Conclusion

The XC6121A343ER-G supervisor is an ideal device for over-voltage/under-voltage protection, with a wide operating voltage range and low current consumption. It is suitable for many types of applications, such as industrial, automotive and consumer electronics, and provides reliable supply voltage monitoring and controlling to protect against brown-out, over-voltage and under-voltage conditions.

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