ISL6558IR-T

Frequency - Switching:	80kHz ~ 1.5MHz
Base Part Number:	ISL6558
Supplier Device Package:	20-QFN-EP (5x5)
Package / Case:	20-VQFN 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):	75%
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Part Status:	Obsolete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:	Tape & Reel (TR)

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Introduction

ISL6558IR-T is a voltage regulator or DC-DC switching controller type of Integrated Circuit. ISL6558IR-T is an innovative dual output synchronous controller designed to provide robust and efficient designs in the banking and financial markets. This device is designed with multiple voltage regulation products and can integrate devices such as synchronous FET drivers, digital-power controllers, and multiple protection features. This product is used in the applications such as telecommunications, IT and consumer electronics.

Applications

The ISL6558IR-T is designed for use in a variety of applications. It can be used in communications equipment, IT equipment, consumer electronics, automotive, aerospace, and military equipment. Some of the features that make this IC so attractive are its high efficiency, wide input voltage range, active voltage planning, and the ability to provide up to 4.8A of output to high current applications. These features make this IC perfect for applications such as communications, automotive, and IT equipment. The device also incorporates several integrated protection features such as UVLO, OTP, and over-current limiting (OCL).In applications like telecom and IT equipment, the ISL6558IR-T is used for providing dual power-supply outputs for efficient system power management. This device can also be used for different output voltages and power requirements in consumer electronics. It is especially useful when designing power supplies that require both high-output and low-output power.In automotive applications, this IC is useful in electronic control units and brake electronics, providing a low-noise and low-ripple power supply. The device is also used to regulate an alternator’s voltage and current, as well as controlling the start-and-stop functions in automotive applications.

Working Principle

The ISL6558IR-T provides dual output voltage regulation via a voltage-mode control scheme. This control scheme employs a conventional PWM (pulse width modulation) controller that senses the load and then accordingly adjusts the duty cycle. When the voltage set point is reached, the PWM controller shuts off the switched voltage and maintains the output voltage level.The ISL6558IR-T also features simple and powerful protection features. For instance, the UVLO (under-voltage lock-out) circuit prevents unreliable supply of power to the system by stopping the PWM control process when the input voltage drops below a predefined voltage level. Similarly, the OTP (over-temperature protection) prevents damage to the IC by immediately halting the PWM control process when the temperature exceeds a certain predefined level. Additionally, the OCL (over-current limiting) feature prevents excessive currents from damaging the IC by providing a current limiting mechanism.Finally, the ISL6558IR-T also provides a number of integrated digital power controller functions, such as programmable output voltage, dynamic response times, and pulse control. All these features are combined to make the IC an ideal choice for efficient and reliable dual power-supply management.

Conclusion

ISL6558IR-T is an advanced device designed to provide efficient and robust dual output voltage regulation and switching in the banking and financial markets, telecommunications, IT and consumer electronics applications. The device offers a wide input voltage range, up to 4.8A of output for high current applications and several integrated protection features. With its high efficiency, active voltage planning, multiple voltage regulation products, and various digital power functions, the ISL6558IR-T is an ideal choice for efficient and reliable power-supply management.

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