ISL6277AIRZ-T

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The ISL6277AIRZ-T is part of a class of Integrated Device Technology components known as PMIC Voltage Regulators – Special Purpose. This type of component regulates and monitoring power supply can be used for multiple purposes, most commonly for voltage and current regulation. The ISL6277AIRZ-T is a high efficiency step-down regulator (also referred to as a buck regulator) and operates over a wide current range with a fixed output voltage of up to 18 V output. It offers a number of features to enable power management in applications where high efficiency and low voltage drop is essential.

Features and Benefits

The ISL6277AIRZ-T offers a number of features to enable power management in applications where high efficiency and low voltage drop is essential. Some of these features include:

• Quad MOSFETs for high efficiency and fast transient response.
• Output voltage tracking for line and load transient response control.
• Integrated compensation for simplified designs.
• Advanced Transient Response (ATR) with adjustable slew rate and onset overvoltage protection (OVP).
• Output current limit.
• Thermal shutdown.
• External sync/PS enable.

Applications

The ISL6277AIRZ-T is an ideal choice for a variety of applications where high efficiency and low voltage drop are required. These applications include digital cell phones, industrial grade embedded devices, automotive and power management systems, and portable medical equipment.

Working Principle

The ISL6277AIRZ-T is a high efficiency step-down regulator (also referred to as a buck regulator). It operates by receiving a higher voltage input than the desired output voltage and then “stepping down” the voltage through a series of transistors and capacitors. This process converts the high voltage input into the desired voltage output with a low current draw from the input. The regulator also offers a number of features that allow it to monitor input and output conditions in order to maintain a stable output voltage to the application.

The voltage converter portion of the ISL6277AIRZ-T is composed of four N-channel MOSFETs connected in a synchronous buck configuration. This configuration allows the regulator to achieve high efficiency while maintaining a low voltage drop across the converter. The input voltage is applied to the regulation circuit through the upper MOSFET while the output voltage is fed through the lower MOSFET. This arrangement allows the ISL6277AIRZ-T to control the output voltage while keeping the input voltage regulated.

The voltage regulator portion of the ISL6277AIRZ-T will monitor the input and output voltages to ensure that the desired output voltage is maintained. The voltage regulator will adjust the duty cycle of the top MOSFETs as needed to maintain the desired output voltage. The duty cycle is controlled using a pulse width modulation (PWM) circuit.

The ISL6277AIRZ-T also offers a number of features that can be beneficial in certain applications. These features include output voltage tracking, overvoltage protection, output current limit, thermal shutdown and external synchronization/PS enable. All of these features help to ensure that the ISL6277AIRZ-T operates at maximum efficiency and reliability in any application.

Conclusion

The ISL6277AIRZ-T is a high efficiency step-down regulator designed to provide stable, reliable power to a wide range of applications. Its features, such as output voltage tracking, overvoltage protection, output current limit, and thermal shutdown, help ensure that it performs at maximum efficiency and reliability. Furthermore, the ISL6277AIRZ-T is ideal for a variety of applications requiring high efficiency and low voltage drop.

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