BU4945F-TR

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Type:	Simple Reset/Power-On Reset
Number of Voltages Monitored:	1
Output:	Push-Pull, Totem Pole
Reset:	Active High/Active Low
Reset Timeout:	--
Voltage - Threshold:	4.5V
Operating Temperature:	-40°C ~ 125°C (TA)
Mounting Type:	Surface Mount
Package / Case:	SC-82
Supplier Device Package:	4-SOP
Base Part Number:	BU4945

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

BU4945F-TR SupervisorsPMIC (Pulse Width Modulated Integrated Circuit) supervisors are popular semiconductor integrated circuits used to monitor and observe the power supply to ensure it remains stable. They are often used as a safeguard against power surges that could potentially damage a system. The BU4945F-TR PMIC supervisor is one such circuit, featuring a low-voltage or low-current reset, high-accuracy monitoring circuits and a low standby power consumption of 1µA. In this article, we will explore the BU4945F-TR PMIC supervisor\'s application field and working principles.ApplicationsBU4945F-TR supervisors are well-suited for low-voltage monitoring applications, such as those found in automotive, telecom and automotive electronics. The circuit can easily monitor both battery and power supplies. It is also commonly used for industrial equipment with high accuracy and low power requirements.Apart from industrial and general purpose applications, BU4945F-TR supervisors are also used in modern digital systems such as robots, medical systems and smart home solutions. They provide reliable protection of harsh environments and guarantee the safety of systems when the power supply is off.Working PrincipleThe BU4945F-TR PMIC supervisor is a voltage monitoring circuit that features an inner supervisor circuit, output buffer, reset time delay circuit and monitoring voltage error amplifier. The supervisor circuit is responsible for monitoring the input voltage, while the error amplifier sets the detection voltage threshold. The supervisor monitors the voltage at the input, and when it drops below the set threshold, it triggers the reset.The BU4945F-TR supervisor also features a reset time delay to protect against false triggers from momentary voltage drops. The circuit monitors voltage input and keeps the reset pin in a low state for a predetermined period, after which it can be programmed to reset itself. The delay time, usually set between 5ms and 300ms, is adjustable by setting a resistor between the VR pin and the SST pin of the reset circuit.The BU4945F-TR PMIC supervisor also provides protection against power surges and brownouts. It is designed to prevent any power fluctuation from causing any damage to the system, by providing the system with an external reset signal when such a power fluctuation is detected.ConclusionThe BU4945F-TR PMIC supervisor is a popular choice for low-voltage monitoring applications, due to its low power consumption, high-accuracy monitoring and reset time delay features. It is widely used in automotive, telecom and medical applications as a safeguard against power surges and brownouts that can cause damage to systems. Its monitoring circuit monitors the input voltage and its error amplifier sets the detection voltage threshold. When a power fluctuation is detected, the circuit sends a reset signal, protecting the system from damage.

The specific data is subject to PDF, and the above content is for reference

Part Number	Manufacturer	Price	Quantity	Description