NCP303LSN47T1G

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Type:	Simple Reset/Power-On Reset
Number of Voltages Monitored:	1
Output:	Open Drain or Open Collector
Reset:	Active Low
Reset Timeout:	Adjustable/Selectable
Voltage - Threshold:	4.7V
Operating Temperature:	-40°C ~ 125°C (TA)
Mounting Type:	Surface Mount
Package / Case:	SOT-23-5 Thin, TSOT-23-5
Supplier Device Package:	5-TSOP
Base Part Number:	NCP303

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NCP303LSN47T1G Application Field and Working Principle

PMIC (Power Management Integrated Circuits) are an integral part of today\'s electronic systems. Supervisors, a popular category of PMICs, perform a range of protection, monitoring, and controlling functions that secure the proper operation of electronic systems. The NCP303LSN47T1G, offered by ON Semiconductor, is a 4-lead, single-channel supervisor circuit featuring a fixed threshold voltage with a guaranteed accuracy. This device provides threshold accuracy and a low level of stress across the entire operating temperature range. It has a wide variety of applications, including system power supervision in SMPS, multi-rail supplies, automotive, and industrial control.

Features

The NCP303LSN47T1G offers many features to facilitate the implementation of system power supervision circuits. These features include: * An adjustable reset output offer a reset assertion voltage for 3.7V. * A reset output capacity of 25mA.* A low operating current of 120µA.* A manual reset input for more flexibility. * An open-drain active-low reset output.The NCP303LSN47T1G is available in a 4-lead SC-62 package, making it a great option for demanding applications that have space limitations.

Working Principle

The NCP303LSN47T1G is a single-channel supervisor IC with a fixed threshold voltage. It is designed to be powered using a regulated voltage, typically +5V DC, either through 3-pin (VCC and GND) or 4-pin (VIN, GND, RST, and Manual Reset) configuration. When the supply voltage exceeds the fixed threshold voltage of 5-8V DC, an active reset signal at the RST pin is asserted. This signal is typically connected to microprocessors and other circuitry to inform them that the power supply is abnormal. The active low reset signal is generated through an open-drain circuit, and the reset output capacity is 25mA (at 3.7V). The manual reset pin is used to manually control the reset signal, and is typically connected to a manual override switch for testing or other purposes. Additionally, the circuit allows external capacitor to be used to reduce noise and stabilize the reset output.

Applications

The NCP303LSN47T1G is a suitable choice for a wide range of applications, including system power supervision in SMPS, multi-rail supplies, automotive, and industrial control. Specific applications include power-on reset protection for CPUs, DSP and MCU controllers, reset generators for critical voltage rail, PC and PC/104 boards, and more. In addition, the device is ideal for embedded solutions that require high accuracy and fast reset propagation time. It features an adjustable reset output of up to 25mA, a low operating current of 120µA, and a manual reset input for more flexibility. The NCP303LSN47T1G, when used in a 4-pin configuration, is an ideal fit for demanding applications with space constraints, thanks to its SC-62 package.The NCP303LSN47T1G, with its protection and monitoring functionality, is a great choice for powering today\'s increasingly complex electronic devices. Its simple and intuitive design makes it easy to use, while its wide range of features and flexible configuration options make it a reliable and robust solution for any application scenario.

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