ISL6522CRZR5190

Frequency - Switching:	200kHz
Base Part Number:	ISL6522
Supplier Device Package:	16-QFN-EP (5x5)
Package / Case:	16-VQFN Exposed Pad
Operating Temperature:	0°C ~ 70°C (TA)
Control Features:	Enable, Frequency Control, Phase Control, Soft Start
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	Yes
Duty Cycle (Max):	100%
Series:	--
Voltage - Supply (Vcc/Vdd):	10.8 V ~ 13.2 V
Output Phases:	1
Number of Outputs:	1
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Output Type:	Transistor Driver
Part Status:	Discontinued at Digi-Key
Packaging:	Tube

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Introduction

ISL6522CRZR5190 is a versatile, high performance power management integrated circuit (PMIC). It is an inexpensive, fully featured, single-channel bi-directional DC/DC converter controller. It is also quite power efficient and allows for greater flexibility when compared to traditional Buck, Boost and Buck-boost circuits. The major application field and working principle of ISL6522CRZR5190 will be discussed in this article.

Application Field

ISL6522CRZR5190 is primarily used in consumer applications and DC/DC converters that are used to regulate the voltage of electrical devices. It is also used in power management designs to manage the power delivery and performance of the circuitry. The device is ideal for battery operated and portable electronic products such as laptops and cellular phones, because it is cost effective, low power and has high accuracy performance characteristics. In addition, ISL6522CRZR5190 can also be used in systems that require regulation of multiple VCC sources, such as automotive, industrial, and embedded systems. This device is suitable for these types of applications due to its fault protection and protection against reverse loads, as well as its ability to regulate the voltage down to low-voltage levels.

Working Principle

The ISL6522CRZR5190 operates off a 4-30V DC input which is regulated down to the desired output voltage. It contains two separate supply outputs that are reversed if the input voltage is negative. In order to optimally regulate the voltage, it has a single-stage linear voltage regulator with a built-in Current Limit circuit that senses and limits an in-rush of current to protect the device from damage. To control voltage regulation, the ISL6522CRZR5190 has an Error Amplifier and a MOSFET driver to control the output switching frequency of the device. The Error Amplifier drives the control loop to increase or decrease the voltage depending on the input voltage. The MOSFET driver then controls the on-off state of the MOSFET switch, allowing for higher efficiency operation. The ISL6522CRZR5190 also incorporates a Comparator and Over-Voltage protection to protect the device from damage due to a voltage surge or when the output voltage exceeds the programmed upper limit. This makes the device suitable for use in a wide range of voltage regulation applications.

Conclusion

The ISL6522CRZR5190 is a versatile, low cost and power efficient PMIC solution for battery operated systems. It can be used to regulate the voltage of multiple VCC sources, with its built-in Current Limit circuit and Error Amplifier/MOSFET driver providing protection and accuracy along with higher performance compared to traditional DC/DC converters. With its flexibility and range of safety features, it is suitable for a wide variety of applications, making it an ideal solution for power management designs.

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