BU4312FVE-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 Low
Reset Timeout:	Adjustable/Selectable
Voltage - Threshold:	1.2V
Operating Temperature:	-40°C ~ 125°C (TA)
Mounting Type:	Surface Mount
Package / Case:	SOT-665
Supplier Device Package:	5-VSOF
Base Part Number:	BU43*

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Introduction

Power Management Integrated Circuits (PMICs) are electric components that manage power in electronic systems such as smartphones, tablets, and laptops. PMICs provide voltage regulation, as well as protection from current spikes, thermal overloads, current overshoots, and rapid discharge. PMICs are used to control the voltage and current across a range of devices, ensuring the reliable operation of the system. Supervisors are one type of PMIC, and they provide additional protection by using integrated comparators, watchdogs, and fault reporting.A supervisor, such as the BU4312FVE-TR, is a PMIC specifically designed to protect a system against power failure, overheating and other system faults. The BU4312FVE-TR provides protection against overvoltage, undervoltage, brownout and overcurrent, as well as secondary protection against power loss. The supervisor also includes an adjustable reset threshold, as well as an open-drain active-high reset output for easy integration.

Application Fields

The BU4312FVE-TR is designed for use in a variety of portable and desktop electronic devices, including smartphones, tablets, laptops and computer components. Such devices require precise voltage and current regulation, and robust power management to protect against failure and other system faults.The supervisor can be used to monitor the power supply of a device and detect potential fault conditions. When a fault is detected, the supervisor will activate an active-high open-drain reset output, effectively resetting the device. This allows the system to recover quickly and ensures reliable, continued operation.The BU4312FVE-TR is also suitable for use in automotive, industrial and medical equipment, which require reliable power management and protection to ensure safe and efficient operation.

Working Principle

The BU4312FVE-TR uses an integrated voltage comparator to monitor the voltage level of the system supply. The comparator continuously monitors the supply voltage, and when it drops below the adjustable reset threshold, the open-drain active-high output is activated.The supervisor also includes a watchdog timer to detect and reset a fault condition. When the watchdog timer is enabled, it continuously monitors the signals connected to its inputs. If the signal level remains high or low for too long, the supervisor will activate the reset output.The BU4312FVE-TR also includes an over-current protection circuit. This circuit monitors the current flowing through the system supply, and if the load current exceeds the set level, the supervisor will activate the reset output.

Conclusion

The BU4312FVE-TR is an ideal choice for applications requiring reliable voltage and current regulation, as well as robust protection from system faults. The supervisor provides multiple functions, including overvoltage and undervoltage protection, current monitoring and an adjustable reset threshold. The BU4312FVE-TR can be used in a wide range of electronic applications, including smartphones, tablets, laptops and automotive, industrial, and medical devices.

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