MAX8667ETEAB+T

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MAX8667ETEAB+T is a power management integrated circuit (PMIC) specially designed to provide adjustable regulated output voltages from a single-cell Li-ion battery. This voltage regulator provides two integrated power sources: an adjustable linear regulator and a dedicated switcher. The linear regulator, which can provide load currents up to 500mA, is used for highly efficient output power management. The dedicated switcher, which can provide load currents up to 3A, is used for high current direct output power, such as fast charging of devices.

The main application field of MAX8667ETEAB+T voltage regulators is mobile and portable products, such as mobile phones, digital cameras, and PDAs. The device is designed with a built-in regulated 1.8V or 2.5V output, with further adjustable output voltage available through external resistors. Moreover, the device features low quiescent current start-up and fast transient response with good load regulation and high PSRR performance. The device also features programmable soft-start functionality, to maximize system reliability.

The main working principle of MAX8667ETEAB+T is as follows. Initially, the battery is connected to the device and an adjustable output voltage is selected by setting external resistors. The current from the battery is then directed towards the linear regulator which provides load current up to 500mA. This regulator provides a smooth and steady output voltage, eliminating the need for external capacitors. When the load current exceeds 500mA, the current will be switched over to the dedicated switcher, which can provide up to 3A of current. The switcher will then provide a steady output voltage and no external capacitors are necessary again.

To maximize system reliability, the device features a programmable soft-start function. This function limits both the inrush current and output voltage to prevent overloading the system. Additionally, the device has a low quiescent current start-up that minimizes power dissipation before the output voltage can be set.

The MAX8667ETEAB+T has high efficiency in both linear and switching modes due to its advanced power management architecture. The device also features an input voltage monitoring function that provides an indication of low or critically low battery voltage conditions.

In conclusion, MAX8667ETEAB+T is a power management integrated circuit (PMIC) specially designed to provide adjustable regulated output voltages from a single-cell Li-ion battery. With its two integrated power sources, adjustable linear regulator and a dedicated switcher, the device is suitable for mobile and portable products. Additionally, its low quiescent current start-up, fast transient response and programmable soft-start functionality further make it a great choice for voltage regulator applications.

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