Voltage - Output (Min/Fixed):	0.6V
Base Part Number:	ISL8016
Supplier Device Package:	20-QFN (3x4)
Package / Case:	20-VFQFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Synchronous Rectifier:	Yes
Frequency - Switching:	525kHz ~ 3.9MHz
Current - Output:	6A
Voltage - Output (Max):	5.5V
Series:	--
Voltage - Input (Max):	5.5V
Voltage - Input (Min):	2.7V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Active
Packaging:	Tube

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PMIC - Voltage Regulators - DC DC Switching Regulators

ISL8016IRAJZ Application Field and Working Principle

The ISL8016IRAJZ is a synchronous step-down buck converter featuring high efficiency and low power dissipation. As a multi-phase controller, it integrates multiple high efficiency power stages with each phase capable of providing an adjustable output current level with a high output current switching frequency of up to 3 MHz. This makes ISL8016IRAJZ an ideal choice for high performance synchronous buck applications demanding size and cost efficiency.Applications with the ISL8016IRAJZ include power supplies outputting up to 14.4 V, portable and battery powered products, data acquisition and communications systems in the industrial and medical fields, polarity converters, point-of-load power supplies and other applications requiring high efficiency and high power supply performance.

Working Principle

The working principle of the ISL8016IRAJZ is a synchronous voltage converter which produces an adjustable output voltage from a stepped-down input voltage source. The controller is composed of two main sections, an error amplifier and a control logic block. The error amplifier compares the feedback signal from the output voltage sensing resistor with an internal reference voltage and produces an output signal proportional to the voltage difference or "error". The control logic block uses this signal to drive the power switches in order to maintain the required output voltage.The ISL8016IRAJZ employs a synchronous architecture, where two main routines are executed, namely peak-current-mode control and valley-current-mode control. The peak-current-mode control is used to control the gate drive of the high-side switch and the valley-current-mode control is used to control the gate drive of the low-side switch. The two routines manage the phase relationship between the high-side and low-side switches in order to ensure optimal power transfer from the input voltage source to the output voltage regulator.

Features

The ISL8016IRAJZ device is a 2-phase, pulse width modulation (PWM) control device that offers the following features: - High efficiency step-down DC-DC converter capable of delivering up to 14.4 V- Symmetric peak-current mode and valley-current mode control - High switching frequency up to 3 MHz - Adjustable switching frequency- Multi-phase operation for higher current output - Programmable output/input soft-start - Programmable current limit protection - Multiple output voltage settings: 0.9 V to 14.4 V- Adjustable over-temperature protection- Pulse-by-pulse current limit The ISL8016IRAJZ is a highly-efficient alternative to traditional linear regulators, and its small footprint makes it an ideal choice for cost-sensitive applications. The device operates from an input voltage range of 4.5 V to 15 V, allowing it to be used in a wide range of applications.

Conclusion

The ISL8016IRAJZ synchronous step-down buck converter is an ideal choice for cost-sensitive high efficiency synchronous buck applications that require higher output currents. The device\'s adjustable output voltage range and its peak-current mode and valley-current mode control make it an ideal solution for a variety of power supplies, such as portable and battery powered products, data acquisition and communications systems, polarity converters, point-of-load power supplies, and other applications requiring high efficiency and high power supply performance.

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