ISL6269IRZ-T

Frequency - Switching:	200kHz ~ 600kHz
Base Part Number:	ISL6269
Supplier Device Package:	16-QFN (4x4)
Package / Case:	16-VQFN Exposed Pad
Operating Temperature:	-40°C ~ 100°C (TA)
Control Features:	Enable, Frequency Control, Phase Control, Power Good
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	Yes
Duty Cycle (Max):	--
Series:	Robust Ripple Regulator™ (R3)
Voltage - Supply (Vcc/Vdd):	7 V ~ 25 V
Output Phases:	1
Number of Outputs:	1
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Output Type:	Transistor Driver
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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ISL6269IRZ-T Application Field and Working Principle

ISL6269IRZ-T is an advanced step down DC-DC switching controller IC from Intersil Corporation, a company well known for its expertise in providing ultra-low power solutions to many industries. This controller is designed to provide high power density in a miniature form factor and is suitable for small-footprint, high-performance systems. It features a wide input voltage range from 4V to 32V and provides high-efficiency operation well beyond 90%. Additionally, the controller incorporates advanced features such as temperature compensation, auto-restart and soft-start.

Application Field

ISL6269IRZ-T is a high-performance, step down DC-DC switching controller designed for applications such as adjustable and fixed voltage power supplies, on-board battery management systems, bus rails, hot-site and application processors, FPGA cores, and hot-plug power sources. It is ideal for applications requiring very small-form factor and high efficiency in a wide input voltage range.

Working Principle

The ISL6269IRZ-T utilizes a single pulse width modulation (PWM) for both current and voltage regulation control. By varying the on-time of the power switching element, a fast transient response and excellent load regulation can be achieved. The architecture of the PWM controller limits the maximum on-time of the switching element allowing higher frequency operation while maintaining tight control.In addition, an internal voltage feedback loop allows the ISL6269IRZ-T to provide an adjustable output voltage between 0.8V and its input voltage, allowing efficient operation in multiple concurrent applications. The adjustable output voltage range can be set within an accuracy range of ±2.5%. The device integrates an adjustable soft-start feature, allowing the output voltage to slowly ramp during start up and avoiding inrush current spikes.The ISL6269IRZ-T incorporates a number of advanced features for easy integration into applications requiring low-ripple and high-efficiency operation. The device features short-circuit protection and output over-voltage protection to prevent damage from excessive output current or from inductive loads. The device further includes an adjustable phase compensation option for current sharing applications, for improved stability in multiple output systems.

Conclusion

ISL6269IRZ-T from Intersil Corporation is an advanced step down DC-DC switching controller IC which offers very high power density in a tiny form factor. It provides wide input voltage range and high efficiency operation, and incorporates powerful features such as temperature compensation, auto-restart and soft-start, making it ideal for small-footprint and high-performance applications such as adjustable and fixed voltage power supplies and on-board battery management systems. The device utilizes a single PWM control for both current and voltage regulation control, enabling a fast transient response, excellent load regulation, and adjustable output voltage range. It further includes advanced features such as short-circuit protection, adjustable phase compensation, and output over-voltage protection, making it an excellent solution for applications requiring high efficiency and low-ripple operation.

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