NCP303LSN16T1

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Power Management Integrated Circuits (PMICs) are versatile integrated circuits specifically designed to minimize a design’s overall power consumption. Supervisors are a class of PMICs which provide voltage monitoring, reset functions and windowed watchdog timers. The NCP303LSN16T1 is a supervisor integrated circuit released by ON Semiconductor. It is a two-channel reset/supervisor IC that features two independent push-pull reset signals, supply voltage monitoring and two clocking options.

Application field

The NCP303LSN16T1 is specially designed to offer a high level of reliability for a wide range of electronic products including computers, automobiles and system-on-chip (SoC) applications. In these applications, the supervisor’s circuit provides a reset signal to peripherals in the event of a power-on reset condition, a supply voltage brown-out, or a system clock error condition. It also controls the supply voltages and delivers system reset control signals with built-in fault detection and lockout functions for multiple system supply voltages in multiple supply domains. Additionally, the NCP303LSN16T1 includes reset and watchdog timers and the reset signals can be configured to indicate active-high or active-low.

Working Principle

The working principle of the NCP303LSN16T1 can be described in three steps, power supply connection, reset operation mode and active-high or active-low setting, respectively.

The first step is connecting the power supply. Specifically, the NCP303LSN16T1 must be connected to the appropriate supply voltage. This device is specifically designed for system applications operating from dual supply voltages, with one supply for the logic domain and the other for the power domain.

The second step is setting the reset operation mode. The device can be configured to execute a one-shot reset or to generate a continuous reset signal. The reset signal duration can be programmed to last a predetermined number of clock cycles through the internal circuitry of the NCP303LSN16T1. This reset signal can also be used to reset downstream peripherals in the event of a system fault.

The final step involves setting the active-high or active-low on the reset signal. This is achieved via a single pin that is used to configure the device for an active-high or active-low reset signal. Setting the reset signal to active-low is beneficial for applications that require a reset signal to remain active until the supply voltage reaches a specified level, or when the system clock stabilizes and the board-level system is ready for operation.

The supervisor integrated circuit NCP303LSN16T1 from ON Semiconductor provides an effective reset and reset control solution for applications in computers, automobiles and SoCs. It features two independent push-pull reset signals, supply voltage monitoring and two clocking options, making it suitable for dual supply voltage systems. The device can be configured to generate a one-shot or a continuous reset signal and the reset signal can be configured to be active-high or active-low.

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