XC6123D318ER-G

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The XC6123D318ER-G is a very popular supervisory circuit designed specifically to monitor power supply lines in integrated circuit (IC) applications. This circuit contains two output MOSFETs with a built‐in regulator for low‐side current limiting, two programmable delay timers, an adjustable power on reset (PONR) function and an integrated voltage supervisor used for brown‐out detection. The XC6123D318ER-G is typically used in applications such as embedded microcontrollers, FPGAs, DSP processors, and other digital logic control systems.The main purpose of the XC6123D318ER-G is to maintain a clean, stable steady state power supply voltage to the integrated circuit. This is achieved by constantly monitoring the input voltage levels and responding to any unexpected changes or drops in voltage. The XC6123D318ER-G can also be used to provide additional protection against over‐current, over‐voltage or reverse polarity conditions of the power supply.One of the key features of the XC6123D318ER-G is its highly configurable nature. The circuit can be adjusted to meet the specific power needs of an application by changing the output voltage level, delay time and power on reset voltage settings. This allows a system designer to tailor the circuit to their exact requirements.The XC6123D318ER-G circuit is divided into two sections: the voltage supervisor (VS) and the switching regulator (SR). The VS section monitors the input voltage level and generates a reset pulse to the SR section when the input voltage drops below a pre‐defined threshold voltage. This reset pulse instructs the SR to shut down any current and prevent any further current flow in either direction.The SR section has two outputs: an enable pin for enabling the MOSFETs and a voltage sense pin for controlling the enable voltage. Both of these pins can be connected to logic inputs to enable and control the switching output. The delay time can be set to a predetermined value by connecting a resistor and capacitor to the delay pin and the power‐on‐reset (PONR) voltage is adjusted using a potentiometer.In summary, the XC6123D318ER-G is an advanced supervisory circuit designed to provide clean, stable power supply voltage levels to integrated circuits. Its fully configurable nature makes it ideal for use in embedded systems, FPGAs, DSP processors and other digital logic control systems. Its advanced features, such as the programmable delay timers and adjustable power on reset voltage, allow it to be tailored to the exact power needs of the application.

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