ISL8018IRAJZ-T7A

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Function:	Step-Down
Output Configuration:	Positive
Topology:	Buck
Output Type:	Adjustable
Number of Outputs:	1
Voltage - Input (Min):	2.7V
Voltage - Input (Max):	5.5V
Voltage - Output (Min/Fixed):	0.6V
Voltage - Output (Max):	5.5V
Current - Output:	8A
Frequency - Switching:	500kHz ~ 4MHz
Synchronous Rectifier:	Yes
Operating Temperature:	-40°C ~ 85°C (TA)

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ISL8018IRAJZ-T7A Application Fields and Working Principle

DC-DC Switching Regulators are electronic systems used to control the flow of electrical current in a wide range of consumer electronics, industrial and commercial applications. ISL8018IRAJZ-T7A is an example of a DC-DC Switching Regulator. This Switching Regulator is broadly used in applications such as high-end notebooks, cellular phones, PDAs and other microprocessor-driven electronics.

Design Benefits and Features

ISL8018IRAJZ-T7A is based on a high-performance design, utilizing the latest in power supply design control, soft-start and other features. Its features include:· High frequency synchronous buck architecture· 3A load capability· Easy to use external components and controls· Reduced component count· PWM dimming capability· Accurate current limit· Built-in soft start · Power-good indication · Current-mode Loop Control · Over-voltage protection

Applications

The ISL8018IRAJZ-T7A is capable of operating at a wide output range, making it suitable for a variety of applications. These applications include: DC/DC converter, Power Inverter, Power Supply, VR System, Remote Sensing, Visual/Motion Control and other Electronic Systems.

Working Principle

DC-DC Switching Regulators work by taking a higher input voltage and stepping it down to a lower output voltage while controlling the current. The power conversion is done by an inductor and a MOSFET switch. The inductor is used to store energy during the ‘on’ period and then releases the energy in the required voltage during the ‘off’ period.The source of the current for the ‘on’ period is the input voltage, which is then regulated and stepped down to the desired output voltage. This is controlled by a feedback control loop, which senses the output voltage and adjusts the duty cycling of the MOSFET switch so that the output voltage remains constant.When the ISL8018IRAJZ-T7A is operating in PWM mode, the duty cycle is adjusted according to the input pulses, thus controlling the output voltage. This allows for higher power efficiency with reduced power losses.

Conclusion

The ISL8018IRAJZ-T7A is a type of DC-DC Switching Regulator designed for use in high-end notebook PCs, cellular phones, PDAs and other microprocessor-driven electronics. It is based on a high-performance design and features reduced component count, along with easy to use external components and controls. Its working principle involves a MOSFET switch and an inductor which work together to regulate and step-down the voltage to the desired output. The ISL8018IRAJZ-T7A is suitable for a variety of applications including DC/DC converters, Power Inverters, Power Supplies, Remote Sensing, Visual/Motion Control and more.

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