ISL6569CBZ-T

Frequency - Switching:	80kHz ~ 1MHz
Base Part Number:	ISL6569
Supplier Device Package:	24-SOIC
Package / Case:	24-SOIC (0.295", 7.50mm Width)
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Part Status:	Obsolete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:	Tape & Reel (TR)

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Introduction

The ISL6569CBZ-T is an energy-efficient pulse width modulation (PWM) controller IC for non-isolated, synchronous DC-DC buck conversion applications. It’s designed to maximize efficiency while reducing thermal dissipation and cost in space-constrained designs. The device offers a wide range of voltage-regulation and power distribution capability, all with low peak current requirements. With its current mode, PWM control and complete protection circuitry, the ISL6569CBZ-T simplifies the design and implementation of buck-regulating systems.

Application Fields of ISL6569CBZ-T

The ISL6569CBZ-T DC-DC switching controllers can be applied in a variety of application fields such as industrial, medical, energy, consumer electronics, telecom and more. Its many features and capabilities make it suitable for a variety of applications, including compute and storage systems, adapters, battery management and testing.The controller IC is also particularly well suited for DC/DC buck converters that require high efficiency, low noise operation and a small area of implementation. In addition, the ISL6569CBZ-T can be used for power supplies with multiple output configurations, as well as voltage and current regulated supplies.The ISL6569CBZ-T is well-suited for applications that power storages or adapters, as it supports a programmable phase dropping and load balancing functionality, allowing designers to reduce input current ripple and lowers total cost of ownership.

Working Principle of ISL6569CBZ-T

The ISL6569CBZ-T works by transforming a pulse width modulation (PWM) into a fixed frequency, current mode of operation. The operation is based on a constant frequency, current mode control architecture that produces a fixed frequency PWM output. The switching frequency of the PWM controller is adjustable via a voltage level resistor. The controller operates in a fixed frequency mode, which eliminates the need for external frequency setting components. The device also features soft-start and under-voltage lockout (UVLO) features which ensure the controller will not start up if the input voltage is too low.The ISL6569CBZ-T provides an integrated circuit that eliminates many components needed in a traditional voltage regulator, thus reducing cost and application time in the development of current and voltage regulated power supplies. The device also offers a wide range of protection features, including temperature sensing and metal-oxide-semiconductor field-effect transistor (MOSFET) protection. The ISL6569CBZ-T also features over-voltage, over-current, over-temperature, and under-voltage protection features, as well as pulse-by-pulse current limit, intermittent duty cycle control, and 60° degree phase shedding.

Conclusion

The ISL6569CBZ-T is a DC-DC switching controller that offers a wide range of application possibilities for industrial, medical, energy, consumer electronics, telecom and more. It features a current mode, PWM control, comprehensive power distribution and protection circuitry in a very compact form factor that is designed to maximize efficiency while reducing thermal dissipation and cost in space-constrained designs. In addition, the device has an adjustable frequency switch and other features which assist designers in realizing the best performance out of their power supplies. With the approval of the UL certification, it is now possible to use the ISL6569CBZ-T controller IC in a wide range of AC/DC applications.

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