ISL6569CR

Frequency - Switching:	80kHz ~ 1MHz
Base Part Number:	ISL6569
Supplier Device Package:	32-QFN (5x5)
Package / Case:	32-VFQFN Exposed Pad
Operating Temperature:	0°C ~ 70°C (TA)
Control Features:	Current Limit, Enable, Frequency Control, Power Good
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	--
Duty Cycle (Max):	75%
Series:	--
Voltage - Supply (Vcc/Vdd):	4.75 V ~ 5.25 V
Output Phases:	2
Number of Outputs:	2
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Output Type:	PWM Signal
Part Status:	Obsolete
Packaging:	Tube

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Introduction

The ISL6569CR is a general purpose, high performance, low quiescent current, DC-DC switching controller IC specifically designed for power management applications. It is part of the popular ISL65xxCR family of voltage regulators and DC-DC switching controllers suitable for a wide range of industry and consumer applications.

ISL6569CR Features and Benefits

The ISL6569CR has several features and benefits that make it attractive to designers of high performance power systems. Firstly, it has a wide input voltage range of between 3V and 40V, while having an output current range of up to 8A. This provides flexibility to designers who are dealing with high current applications such as portable power appliances. Another benefit is the low quiescent current of only 12μA in a 30V input and 3.3V output system. This means that the power efficiency of a power supply system which employs the ISL6569CR is increased, as the overall power consumption is decreased. Additionally, the ISL6569CR incorporates a spread spectrum clock generator which reduces the peak current in the supply lines and EMI/EMC generated by the system. This feature leads to improved design reliability and lower cost of ownership.Furthermore, the output is adjustable from 0.8V to VIN and utilizes a high-speed internal controllable voltage slope for fast line and load transient response. It also has an adjustable soft-start feature to provide ramp up control to reduce inrush current.

ISL6569CR Application Field and Working Principle

The ISL6569CR is designed for use in automotive, server, industrial, and communications applications and is the perfect choice for applications such as distributed power converters, voltage regulators, DC-DC converters, automotive chargers and other applications requiring robust, high performance and low quiescent current power management solutions.The ISL6569CR works in three basic modes of operation. Firstly, it regulates the output voltage by synchronizing a high-speed wall-wetting pulsewidth modulated (PWM) converter with a slower ramp up/down Slope Compensation Ramp Generator (SCRG). Secondly, it utilizes a Slope Compensation Control System (SCCS) which works to minimize high voltage transients when the switch turns off. Finally, the internal bias has an adjustable soft-start or slow-start feature which allows the user to adjust the ramp up time for reduced inrush current.

Conclusion

The ISL6569CR is a general purpose, high performance, low quiescent current, DC/DC switching controller IC specifically designed for power management applications. It is part of the popular ISL65xxCR family of voltage regulators and DC-DC switching controllers, and offers designers excellent features and performance benefits for a wide range of industry and consumer applications.

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