ISL6565ACBZ

Frequency - Switching:	80kHz ~ 1.5MHz
Base Part Number:	ISL6565A
Supplier Device Package:	28-SOIC
Package / Case:	28-SOIC (0.295", 7.50mm Width)
Operating Temperature:	0°C ~ 105°C (TA)
Control Features:	Enable, Frequency Control, Power Good
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	--
Duty Cycle (Max):	66.7%
Series:	--
Voltage - Supply (Vcc/Vdd):	4.75 V ~ 5.25 V
Output Phases:	3
Number of Outputs:	3
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Output Type:	PWM Signal
Part Status:	Obsolete
Packaging:	Tube

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Introduction

The ISL6565ACBZ is a monolithic integrated circuit, which is an active Pulse-Width Modulation (PWM) step-down DC-DC controller manufactured by Renesas. It is designed to provide a broad analog voltage regulation solution for applications such as point-of-load (POL) voltage regulation, power factor correction (PFC), direct current to direct current (DC-DC) conversion, applications that require high levels of accuracy, and low noise voltage source from a single source.

Features of the ISL6565ACBZ

This component offers a wide range of features to enable it to be deployed in a variety of applications. Some of these features include:

• Voltage regulation within 30mV of 0.8V to 4.5V.
• Operating current of 0.65mA/channel.
• Accuracy of ±1.5% over temperature.
• Soft start.
• Undervoltage lockout.
• Short circuit protection.
• Current limit.
• Event detect.
• Differential remote sense.
• Overshoot control.

Application Fields for the ISL6565ACBZ

The ISL6565ACBZ can be used in a variety of applications that involve DC-DC conversion. Some of these applications include:

• Point-of-Load (POL) convertors.
• Automotive power inverters.
• Power supplies.
• Telecom power supplies.
• Battery-powered systems.
• Load sharing.
• DC-DC modules.

It is designed to drive the MOSFETs and the related external components of a DC-DC converter in a high-efficiency, low-noise and reliable manner.

Working Principle of the ISL6565ACBZ

The working principle of the ISL6565ACBZ is based on the active voltage regulation technology. This means that the output voltage is sensed by the device and compared against an internal reference voltage.The voltage sensing is done by the device\'s internal sense pin, which is connected to the output of the regulated power supply. The internal reference voltage is set via a resistor divider on the input of the device. When the voltage is higher than the reference voltage, the device will reduce the PWM duty cycle to decrease the amount of power supplied to the load. When the voltage is lower than the reference voltage, the device will increase the duty cycle to increase the amount of power supplied to the load. This will ensure that the output voltage remains within a set range and is regulated.

Conclusion

The ISL6565ACBZ is a monolithic integrated circuit, which is an active Pulse-Width Modulation (PWM) step-down DC-DC controller manufactured by Renesas. It is designed to provide a broad analog voltage regulation solution for applications such as point-of-load (POL) voltage regulation, power factor correction (PFC), direct current to direct current (DC-DC) conversion, applications that require high levels of accuracy, and low noise voltage source from a single source. It offers a wide range of features to enable it to be deployed in a variety of applications and can be used in a number of applications such as point-of-load (POL) convertors, automotive power inverters and power supplies.The working principle of the ISL6565ACBZ is based on Active Voltage Regulation Technology which helps to regulate the output voltage in a range required. It senses the output voltage and compares it against an internal reference voltage, and adjusts the PWM duty cycle as to increase or decrease the power supplied to ensure the desired output voltage is achieved. This makes the ISL6565ACBZ an ideal solution for applications that require precise control of the output voltage.

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