NCP300HSN18T1

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PMIC - Supervisors refer to a type of power management integrated circuit that supervises the power supply conditions in the system. NCP300HSN18T1 is a low-cost, micro-power multi-channel system reset supervisor for power management applications. It is optimized for battery-powered applications, provides high noise immunity, and multiple reset outputs.

NCP300HSN18T1 Application Field

NCP300HSN18T1 can be widely used in consumer electronics circuits such as notebook computers, tablet computers, mobile phones, digital cameras, flat panel displays, and other portable handheld devices. It can also be used in automotive and industrial power systems.

NCP300HSN18T1 Working Principle

NCP300HSN18T1 consists of two voltage monitoring circuits, of which one is dedicated to the main power supply (typically a battery), while the other is associated with an auxiliary power supply (typically the system voltage regulator). The integrated reset control logic monitors the conditions of the input supplies and warns the system with an adjustable reset pulse when the auxiliary supply drops out or rises above the programmed threshold. An integrated watchdog timer audit timer is also included to alert when the system fails to reset for an extended period of time.

The reset threshold and watchdog timeout are both programmable. They can be programmed by a single external resistor and by a specific port command, respectively. The reset pulse width is also adjustable, allowing for both short and extended pulses in the event of reset. The input of the reset control logic is in an efficient OTP sub-state, which provides the robust system startup capability by enabling delay functions of the reset by detecting the slow rise time of the input voltage.

NCP300HSN18T1 has power-down prevention feature that prevents a power loss during system power-down. It can detect whether the system is powered down and then hold the previously set power status. This ensures that the system will maintain the correct power status after power-up.

NCP300HSN18T1 combines an adjustable reset pulse width and reset pulse-width counter with a programmable watchdog timer, providing a complete reset management solution with a 8-pin package. The device can reduce power dissipation and meet system reset requirements with its low power consumption, low quiescent current, and low reset current.

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