ISL6144IVZA-T

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PMIC - OR Controllers, Ideal Diodes

ISL6144IVZA-T is an advanced integrated circuit designed for OR Controllers, Ideal Diodes applications. It has been designed to be incorporated into multi-function devices to provide the smoothest possible low-voltage power supply operation in a robust, yet cost-effective manner. The design of this IC is based on a combination of advanced linear and pulsed-sensing techniques that deliver unparalleled system performance, with high efficiencies and a reliable solution for networking, computing, communications and telecom applications.

Overview of Working Principle

The ISL6144IVZA-T works by combining an OR Controller and Ideal Diode in one integrated circuit. The ideal diode works as a voltage rectifier, preventing current flowing in the reverse direction, while the OR Controller acts as a switch, which optimizes the efficiency of the application. The OR Controller automatically decides which junction of the diode will have the lower RDSON based on the external resistance, as well as its own fixed resistance. This switch operates synchronously with the ring oscillator, which generates the frequency required by the OR Controller to respond efficiently.

The OR Controller compares the voltages at the two diodes, and decides which is lower. Once it determines the lower voltage, it enables the path from it to the output. This increases the power efficiency of the power source, since only one path between the two diodes is used for a given period of time. The other diode carries the current to the inductor and has a much lower voltage drop, which reduces absolute power losses.

Features and Benefits of ISL6144IVZA-T

The ISL6144IVZA-T integrates both the OR Controller and Ideal Diode in one IC, reducing board space and the need for multiple components to achieve the same result. This device also features a built-in soft-start feature, which reduces inrush current on system startup. It has an excellent thermal characteristic, making it suitable for operation in a variety of environments. Other key features of the ISL6144IVZA-T include:

• Wide input voltage range (2.5V to 5.5V)
• High peak current rating (1.2A)
• High peak power rating (15W)
• Low quiescent current (615µA @Vin=3.3V)
• Excellent efficiency (up to 98%)

The ISL6144IVZA-T device provides a cost-effective solution for OR Controllers, Ideal Diodes applications, such as in networking, computing, communications and telecom applications. The device is also suitable for high-voltage/high-current pulsed loads, as well as other linear applications, where low power and high efficiency are desired.

Design Considerations

Care must be taken when designing with the ISL6144IVZA-T device, as the integrated circuit’s switching frequency is largely dependent on the values of external components. Factors such as the value of the inductor, external resistor, capacitor and output voltage all affect the switching frequency and must be kept within their specified ranges in order to maintain high efficiency. Additionally, the input capacitors must be placed as close as possible to the device, to maintain a low-noise power supply, and the output capacitors must be rated for the specified current and voltage.

Conclusion

The ISL6144IVZA-T is an advanced integrated circuit, designed for OR Controllers, Ideal Diodes applications. The device is highly efficient, providing a cost-effective solution in networking, computing, communications and telecom applications. Care must be taken when designing with the device, as the values of external components affect the switching frequency and must be kept within the specified ranges in order to maintain high efficiency. Overall, the ISL6144IVZA-T is an excellent choice for a wide range of applications.

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