MAX687CPA

MAX687CPA is a linear voltage regulator that has been manufactured by Maxim Integrated since 2010. It is available in a wide variety of options – such as three-terminal and adjustable voltage regulators, high-voltage gain adjustable and bandgap reference circuits. The MAX687CPA utilizes advanced integrated circuit technology to generate a wide range of control-voltage options, and provide high performance in various power management applications.

Application Field

The MAX687CPA is suitable for use in a variety of power management applications. These include high-current, low-voltage, high-voltage, and low-dropout (LDO) linear voltage regulators. Due to its low dropout voltage, it is particularly suitable for powering low-voltage integrated circuits (ICs) such as logic and mixed-signal circuits. The MAX687CPA permits the flexibility of two alternative voltage regulator configurations: three-terminal and adjustable.

The MAX687CPA is also ideal for use in applications requiring an adjustable voltage regulator, since it has options such as high-voltage gain adjustable and bandgap reference circuits. These options offer the ability to adjust the output voltage of the device, which can facilitate efficient operation in a range of other control-voltage related applications.

Another application field where the MAX687CPA can be applied is in the conversion of voltages from an AC (alternating current) supply to a DC (direct current) supply. The device is suitable for the regulation of such supplies, and its low dropout voltage makes it possible to maintain initialization voltages that are up to one volt below the regulated output voltage.

Finally, the MAX687CPA is suitable for use in a number of automotive-related applications due to its wide range of control-voltage options. The device is suitable for use in a range of automotive applications that require a steady voltage supply, such as powertrain control modules (PCMs), ABS systems and transmission control units (TCUs).

Working Principle

The MAX687CPA is an active circuit that works by sensing the input voltage and responding to changes in the input voltage. In its three-terminal configuration, it comprises three main elements: the output, input, and control circuits. The output circuit is the device responsible for generating the regulated DC voltage to the load, while the input is the circuit that receives the AC supply voltage in the form of a ripple or noise. The control circuit is the element that senses the input voltage and responds to changes in it.

In its adjustable configuration, the device utilizes the same three circuits plus an additional circuit known as the gain circuit. The gain circuit is responsible for adjusting the output voltage, as dictated by the voltage applied on its adjusting pin. The output of the gain circuit is used as an input to the comparator. The comparator is responsible for comparing the two voltages and then turns the accompanying transistors on and off to adjust the output voltage as required.

The MAX687CPA is able to maintain a steady output voltage due to its low dropout voltage and its ability to identify changes in the input voltage. The device is also able to provide a wide range of control-voltage options, thus allowing for efficient power management in a range of applications.