MAX663EPA+

MAX663EPA+ is a temperature-stable, low drop-out CMOS voltage regulator designed to deliver up to 150mA of regulated output current. This linear regulator provides regulated output voltages of +3.3V, ±5V, +7V, and +12V while consuming only 30μA active supply current and maintaining a low drop-out voltage of 0.3V. The MAX663EPA+ also provides an adjustable output voltage range of +1.2V to +12V over the full temperature range. This integrated circuit is ideal for microcomputer systems and other similar applications with demanding voltage requirements.

The MAX663EPA+ provides a robust, low drop-out solution for portable systems that require a high power solution. The chip features low voltage operation, low quiescent current, and fast transient response. The voltage regulator includes an integrated active clamping circuit that reduces power dissipation and improves output performance. Also, the device is available in a MSOP package that allows for higher density and smaller system footprints.

Application Field

The MAX663EPA+ is ideal for a wide range of applications including cell phones, portable computing devices, medical equipment, and automotive products that require small, low power voltage regulators. This device is especially useful for applications that have stringent voltage requirements and low quiescent current requirements. Additionally, the device features an adjustable output voltage range which makes it suitable for applications that require multiple output voltages or adjustable power supply.

Working Principle

The MAX663EPA+ voltage regulator operates on a three stage architecture that includes an input stage, feedback stage, and output stage. The input stage consists of an NMOS transistor and PMOS transistor in a cascode topology. The cascode configuration helps to reduce input voltage noise and supply current ripple. The output stage consists of a differential amplifier with an output transistor in a source-follower configuration. The differential amplifier is used to sense the output voltage and provide feedback to control the output voltage. Finally, the feedback stage consists of a temperature-compensated bandgap reference and an error amplifier. The error amplifier is used to compare the output voltage to the reference voltage and adjust the output voltage to match the reference voltage.

The MAX663EPA+ is designed with both low and high drop-out characteristics. The low dropout mode is specified at 0.3V, and the MAX663EPA+ is also a temperature-stable device, which helps to maintain a constant output voltage over a wide temperature range. Finally, the device also includes a power-saving standby mode and a low quiescent current consumption that helps to reduce power consumption when the device is not in use.

Conclusion

The MAX663EPA+ is an ideal power solution for a wide range of applications where high performance and a low input voltage is required. The device offers a low voltage solution with a 0.3V low drop-out voltage and a wide, adjustable output voltage range. Additionally, the device also provides temperature-stability, low power consumption, and fast transient response. These features make the MAX663EPA+ an ideal choice for a variety of applications.