MC34VR500V2ESR2

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MC34VR500V2ESR2 Application Field and Working Principle

MC34VR500V2ESR2 is a Monolithic Linear + Switching Voltage Regulator from STMicroelectronics. It belongs to STMicroelectronics Positive Voltage Regulator series and offers an efficient, low cost, drop-in replacement for an array of linear and switching regulators.

Features

• Operating ambient temperature range: -40°C to 125°C
• Wide input voltage range: 2.5V to 32V
• Output voltage range: 0.6V to 6V
• Output current: 1A
• Low dropout voltage: 0.3V at 1A
• 100% Drop-in/Replacement for linear, LM2576/78 & switching SBR controller ICs

Application Field

MC34VR500V2ESR2 is suitable for applications such as:

• Telecom Enclosures, Inverters and UPSs
• Digital Processors (CPUs)
• Automotive Computers
• Industrial Electronics
• Battery Charger Circuits

Working Principle

The working of MC34VR500V2ESR2 is based on the combination of linear regulation and switching regulation. Linear regulation works by adjusting the output voltage by monitoring the output current. This is done by a variable resistor in the output circuit, which is connected to the linear regulator\'s voltage regulator. This variable resistor alters the resistance to control the output voltage. In switching regulation, the output voltage is maintained by switching on and off the power transistors. This is done periodically and quickly to maintain the desired output voltage. When the voltage reaches the set limit, the power transistor is switched off and the input current is diverted to the output. The cycle then repeats itself at a specific rate to keep the output voltage at a predetermined level.

The MC34VR500V2ESR2 also includes a voltage limit circuit, which prevents the output voltage from exceeding a preset level and an over current protection circuit. This protection circuit prevents the device from malfunctioning in case of an overload.

This IC also has a power on reset circuit, which maintains the output voltage when the device is switched on. The circuit ensures that the output voltage is within a preset range when the device is turned on.

Conclusion

The MC34VR500V2ESR2 from STMicroelectronics is an ideal solution for a wide range of applications ranging from telecom enclosures, inverters and UPSs, to automotive computers and battery charger circuits. Its combination of linear regulation and switching regulation allows for a reliable, stable and efficient output voltage. Its protection circuits and voltage limit circuit also protect it from malfunctioning.

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