ISL6564IR

Frequency - Switching:	80kHz ~ 1.5MHz
Base Part Number:	ISL6564
Supplier Device Package:	40-QFN (6x6)
Package / Case:	40-VFQFN Exposed Pad
Operating Temperature:	-40°C ~ 85°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:	4
Number of Outputs:	4
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Output Type:	PWM Signal
Part Status:	Obsolete
Packaging:	Tube

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The ISL6564IR is a DC/DC controller that is used in various applications for voltage regulation and power supply management. It is part of a larger family of products from Intersil Corporation and is capable of providing isolated outputs up to 4A with excellent efficiency and low EMI. This device supports independent control of multiple outputs with load sharing capabilities and enables lower standby power during hibernation modes. The ISL6564IR also includes a wide input voltage range of 3V to 28V that makes it suitable for use in both consumer and industrial applications.

Features of ISL6564IR

• Supports input voltage range of 3V to 28V.
• Up to 4A power capability with efficiencies up to 95%.
• Low EMI (<10mVP-P under no load).
• Three output ranges (3.3V, 5V, and 12V).
• Independent control of multiple outputs with load sharing capabilities.
• Low standby power for hibernation modes.
• Flexible power sequencing.
• Programmable over-current protection.
• On-board Temperature Compensation.
• Open-drain Ready/Activity indication.

Application of ISL6564IR

The ISL6564IR is suitable for various applications, especially for those requiring high efficiency, low EMI and power sequencing features. It can provide high efficiency converts for a variety of applications in consumer and industrial equipment, such as laptop computers, LCD/PDP screens, servers, telecoms, and others. It can also provide power converters for FPGA and multiple voltage output boards, and can be used as part of an existing power management system to provide load sharing, power sequencing, and over-current protection. Other key applications of the ISL6564IR include:

• Battery charging systems
• USB power delivery
• Wireless infrastructure and networking
• Point-of-Load (POL) power regulators
• Multi-channel hotswap and autoswapping systems
• LED Driver
• Electric Vehicle Chargers

Working Principle of ISL6564IR

The ISL6564IR provides precision power regulation with excellent power efficiency and low EMI by controlling the output voltage in two main stages. In the first stage, the input voltage is converted to a lower intermediate voltage through a pulse-width modulation (PWM) control. This stage creates a variable-frequency buck converter. In the second stage, the intermediate voltage is then used as an input to an active power circuit known as a High-Side FET, which is used to regulate the output voltage according to the feedback from the external error amplifier.The output voltage is regulated precisely by controlling the input of the FET and the current is also adjusted by controlling the gate voltage of the FET. The ISL6564IR includes other features such as temperature compensation and load sharing on multiple outputs, which enable the device to provide precise power regulation and improve overall system performance.The ISL6564IR also includes over-current protection and under-voltage lockout features that protect the device from excessive current and allow the device to enter sleep mode until the input voltage recovers to the specified level.

Conclusion

The ISL6564IR is an excellent choice for applications requiring high efficiency, low EMI and power sequencing features. This device is capable of providing multiple isolated outputs while also offering high efficiency and low EMI performance. It also has a wide input voltage range of 3V to 28V, making it suitable for use in both consumer and industrial applications. Additionally, the ISL6564IR includes flexible power sequencing, temperature compensation, and over-current protection features that enable the device to provide precise power regulation and superior system performance.

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