IXDI409YI

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PMIC Gate Drivers enable higher voltage, higher current, and higher frequency drive operations for managing the power requirements of CPUs, FPGAs, ASICs, and GPUs. IXDI409YI is a pin-to-pin compatible, low-power, low-cost power-on-reset (POR) IC from Renesas, a leader in developing and delivering innovative system solutions.

The IXDI409YI provides circuits to reset the power supply circuit of an MCU and its external circuits. It is designed to identify a low VCC level, detect power failure conditions, and reset the system. Other features include an adjustable delay time and a manual reset input, as well as an open-drain output that can be connected to an N-channel MOSFET.

The IXDI409YI allows a delay time of up to 25ms and a typical power-up reset time of 0.8ms. The reset function is triggered by a power-fail detector (PFD) input. The PFD input is configured for a set PW duration such that, when 24V is applied, the IXDI409YI will measure the voltage and compare it to the programmed threshold. If the voltage drops below the threshold, reset is triggered.

The IXDI409YI has a power supply range of 4.5V - 24V, a low quiescent current of 4uA, and a low operating current of 2mA. It is suitable for applications in vehicles, battery-operated systems, and home appliances. Additionally, it can be used in battery-operated systems requiring voltage reset and protection from power failures.

The IXDI409YI is a 3-terminal device with two input pins: the PFD and the MR pin. The PFD pin is connected to a VCC power supply pin and is used to detect power failure. The MR pin is connected to a manual reset source and can be used to force a reset of the system. The output of the IXDI409YI is an open-drain output that is connected to an N-channel MOSFET. This MOSFET is connected to an external reset pin of the MCU.

When power is applied to the VCC pin of IXDI409YI, the power failure detector input (PFD) will detect the voltage on the VCC pin. If the voltage is below a predefined threshold, the IXDI409YI will trigger a reset signal to the MCU, resetting the device. The reset signal can be delayed by connecting a capacitor between the set and reset pins. The time constant of the delay can be adjusted by selecting the appropriate capacitor. The output can also be manually reset by connecting the MR pin to VCC, as long as VCC is greater than the PFD threshold.

In conclusion, IXDI409YI is a low-cost, low-power, pin-to-pin compatible POR IC from Renesas. Its primary applications are to reset the power supply circuit of an MCU and its external circuits when a power fail is detected. It has a wide power supply range, low standby current and low operating current, making it suitable for use in automotive and consumer applications. The reset signal can be delayed by connecting a capacitor between the set and reset pins, and can be manually reset by connecting the MR pin to VCC.

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