LM5022QDGSTQ1

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LM5022QDGSTQ1 Application Field and Working Principle

The LM5022QDGSTQ1 is a synchronous buck switching voltage regulator, Specifically designed to operate in high temperature environments up to 150°C. This voltage regulator can deliver up to 4A of continuous output current and is capable of providing a very wide (1.8V to 42V) output voltage range. The LM5022QDGSTQ1 is suited for applications such as automotive, industrial, medical and other commercial products.

Applications

The LM5022QDGSTQ1 is designed to meet a wide range of needs. Some of the common applications include:

• Overvoltage Long-Term Protection in Automotive Electronics Applications

• Industrial power supply design for up to 150°C environments

• Medical equipment power supply design for high temperature operation

• Telecommunication and computer related power supply design

Working Principle

The LM5022QDGSTQ1 is based on a synchronous buck switching regulator architecture. The main components of the voltage regulator are a high-side N-MOSFET driver and an integrated synchronous buck switch. The LM5022QDGSTQ1 regulates the output voltage by accurately controlling the pulse width modulation (PWM) ratio of the high-side driver input signal to the integrated synchronous buck switch. The output voltage is monitored by a precision voltage feedback circuit and then compared to the voltage set-point. If any discrepancy exists, the output voltage is adjusted. The PWM signal is followed by a control loop that minimizes the discrepancy between the monitored voltage and the set-point and, consequently, maintains a stable output voltage.

Features

The LM5022QDGSTQ1 features integrated compensation, output voltage protection, power-up sequencing, and soft-start circuitry. These integrated features make it simple to implement and minimize the number of external components. Some of the features include:

• Integrated N-MOSFET high-side driver for improved efficiency

• Integrated synchronous buck switch

• Optional enable pin (EN) to enable/disable the regulator

• Internal temperature monitoring

• Output voltage protection circuitry

• Integrated power-up sequence control

• Soft-start circuitry

Conclusion

The LM5022QDGSTQ1 voltage regulator is a high-performance, synchronous buck switching voltage regulator designed for applications requiring high output current up to 4A in high temperature environments up to 150°C. It features an integrated N-MOSFET high-side driver and an integrated synchronous buck switch for improved efficiency. The LM5022QDGSTQ1 regulator also incorporates temperature monitoring, output voltage protection circuitry, power-up sequencing, and soft-start circuitry, making it ideal for automotive, medical, industrial and other commercial applications.

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