ISL6546IRZ

Voltage - Output (Min/Fixed):	--
Base Part Number:	ISL6546
Supplier Device Package:	10-DFN (3x3)
Package / Case:	10-VFDFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	--
Synchronous Rectifier:	Yes
Frequency - Switching:	1.5MHz
Current - Output:	1.2A
Voltage - Output (Max):	--
Series:	--
Voltage - Input (Max):	--
Voltage - Input (Min):	--
Number of Outputs:	--
Output Type:	--
Topology:	Buck
Output Configuration:	--
Function:	Step-Down
Part Status:	Obsolete
Packaging:	Tube

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Introduction

The ISL6546IRZ is a synchronous buck regulator integrated circuit that converts input power of 5V to 12V and provides device regulation. It is a highly integrated, low power and reliable circuit which enables the development of advanced power supply solutions. It is manufactured by Intersil Corp and is used in various types of applications.

Applications

The ISL6546IRZ can be used in a number of different applications such as power supplies in servers and workstations, embedded systems, communications equipment, automotive electronics, medical equipment and digital consumer electronics. The device is also suitable for notebook and desktop computer power management, digital imaging systems and battery powered applications.The ISL6546IRZ can be used in a variety of power supplies including Point of Load modules, AC to DC converters, DC-DC converters and battery chargers. The device has an adjustable voltage range from 0V to 12V and can provide a maximum output current of 2A at 12V. It also features adjustable soft start and output and is able to regulate output current as low as 0.3µA. In addition, the device has an integrated Switch MOSFET that allows the user to adjust the switching frequency and duty cycle.

Working Principle

The ISL6546IRZ contains a voltage regulator circuit, a Switch MOSFET, and an external feedback loop. The voltage regulator circuit uses a pulse width modulation (PWM) control method to regulate the output voltage and current. The regulator circuit works by comparing the voltage of the output to the reference voltage of the feedback signal. When the voltage of the output is higher than the reference voltage, the applying signal switches off the Switch MOSFET to reduce the current receiving, which will result in a decrease of output voltage; when the voltage of the output is lower, the applying signal will switch on the MOSFET to increase the current request, and therefore, raises the output voltage.The feedback signal is an internal voltage generated by the voltage divider network including resistors R1 and R2, which are connected to the OUT pin. The change of output voltage also adjust the internal reference voltage, therefore maintaining a stable output voltage. The feedback resistor, R2, determines the output voltage and can be adjusted via the voltage divider to provide the desired voltage output.

Conclusion

The ISL6546IRZ is a highly integrated, low power synchronous buck regulator that provides device regulation of input power of 5V to 12V. It can be used in servers and workstations, embedded systems, communications equipment, automotive electronics, medical equipment and digital consumer electronics. The device has an adjustable voltage range from 0V to 12V and can provide a maximum output current of 2A at 12V. The device has an integrated Switch MOSFET that allows the user to adjust the switching frequency and duty cycle, and an external feedback loop that maintains a steady output voltage.

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