BU4938FVE-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:	3.8V
Operating Temperature:	-40°C ~ 125°C (TA)
Mounting Type:	Surface Mount
Package / Case:	SOT-665
Supplier Device Package:	5-VSOF
Base Part Number:	BU4938

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Introduction

The BU4938FVE-TR is an advanced PMIC (Power Management Integrated Circuit) SUPERVISOR (supervisory circuit) which offers high reliability and wide range of operation. It is designed to maintain single power supply voltage operation and detect faults in power supply system. The BU4938FVE-TR offers features like a very low operating supply current, high accuracy for VDD monitoring, and two independent switched outputs offering fast protection against overcurrent and over-voltage. Its push-button reset input allows for manual reset for safety as well.

Application Field

The BU4938FVE-TR is a universal supervisor used in power supply systems where a wide range of operations and reliable operation is required.BU4938FVE-TR can be used to: 1. Monitor power supply voltages and detect any changes in the voltage range.2. Provide the circuit with a reliable power supply.3. Provide power protection in the event of overload.4. Offer manual reset option in case of safety measures.5. Provide independent switched outputs for fast protection against overvoltage and overcurrent.Moreover, the BU4938FVE-TR can be used in variety of applications including: 1. Automotive, home appliance, and networking systems.2. Industrial, medical and portable electronic applications.3. Power supplies and telecom equipment.4. Battery-powered electronic systems, etc.

Working Principle

The BU4938FVE-TR uses an internal band-gap reference voltage to monitor the power supply voltage of the system. The supervisor will automatically reset when the power supply voltage falls below the lower threshold, and the reset output will be activated if the voltage rises above the upper threshold. An internal timer is used to remove the reset signal after a precise delay when the power supply voltage reaches the lower and upper threshold levels. The supervisor is set up so that the reset is delayed long enough so it will not have false triggers.The BU4938FVE-TR also has independent overvoltage and overcurrent outputs which will offer fast protection against hazardous conditions. Once the output reaches the reference voltage that has been set, the supervisor will send a signal to the overvoltage output and overcurrent output. In addition, the BU4938FVE-TR also features a manual reset for safety. If the system fails, the manual reset input can be pressed to force the master reset that will bring the system back to a safe state.

Conclusion

Overall, the BU4938FVE-TR can be used in wide range of applications and provides reliable power supply management with several options for protection against hazardous conditions. It offers a low operating supply current, high accuracy monitoring and two independent switched outputs that offer fast protection against overvoltage and overcurrent, as well as a manual reset. Therefore, the BU4938FVE-TR is a powerful and reliable PMIC supervisor with many applications.

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