MAX734CPA+

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

Introduction

The MAX734CPA+ is a special purpose voltage regulator manufactured by Maxim Integrated. It is a monolithic CMOS LDO (low drop-out) voltage regulator optimized for high input-voltage applications, such as solar cells, automotive and industrial systems. The device allows excellent power supply rejection ratio and low-noise temperature-compensated operation. The operating voltage range is 4.75V to 40V and output voltage range is 0.8V to 40V. It is available in a 16-lead TQFN package and is characterized by high efficiency, low drop out voltage, low quiescent current drain, soft start-up, fast transients and reverse input protection. This device is suitable for applications like battery-powered motor control, automotive, industrial and solar cell systems.

Application Field

The MAX734CPA+ is typically used in applications where an LDO regulator is needed for high input-voltage applications, such as solar cells, automotive and industrial systems. This voltage regulator maintains an output voltage of 0.8V to 40V regardless of the input voltage, up to a maximum of 40V.

The MAX734CPA+ can be used to provide a voltage output while charging a Li-Ion battery. It can be used to control the charge transfer direction and the current profile, allowing optimized battery charger control circuits. It can also be used in telecom systems or server-farms, where it provides the best thermal performance and low component count.

The device reduces the output voltage ripple and improves efficiency in automotive, motor control, consumer, and lighting applications. These applications depend on maximizing energy efficiency for low weight and small system size. The device can also be used in battery monitoring and protection circuits, where it provides accurate reference signals for over-voltage and under-voltage protection.

Working Principle

The MAX734CPA+ is a semiconductor device based on CMOS technology. It works by using a series-pass MOSFET to control the input voltage applied to the load. The output voltage is determined by the temperature-compensated reference voltage and the voltage feedback network. The device uses a precision bandgap and temperature-compensated reference voltage. This reference voltage is applied to an error amplifier and then scaled accordingly to match the desired output voltage. The error amplifier is then used to control the MOSFET, which adjusts the input voltage applied to the load and maintains the selected output voltage.

The device operates in two modes to conserve power: limit-mode operation and sleep-mode operation. The device will enter limit-mode when the input voltage is below the output voltage. In this mode the output voltage is held at the maximum value and the MOSFET does not supply power to the load. When the input voltage is above the output voltage, the device will enter the active-mode and the MOSFET will control the output voltage.

The MAX734CPA+ operates in a wide range of input and output voltages, has low quiescent current drain, and a fast transient response. It also has a soft start-up feature that reduces inrush current during power up or power down. It also provides reverse input protection and current sense capability.

Conclusion

The MAX734CPA+ is a monolithic CMOS LDO (Low Drop Out Voltage) voltage regulator designed for high input voltage applications. It operates with an operating voltage range of 4.75V to 40V and output voltage range of 0.8V to 40V. The device allows excellent power supply rejection ratio and low-noise temperature-compensated operation. This voltage regulator is mainly used in solar cell, automotive and industrial applications, as well as for charging a Li-Ion battery.

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