ISL9016IRUCBZ-T

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ISL9016IRUCBZ-T application field and working principle

ISL9016IRUCBZ-T is a step-down power management integrated circuit (PMIC) of linear voltage regulators (VR) which released by the Renesas Co. It enables system flexibility, which helps the users to Quickly adapt power management strategy easily. This device includes the features of SMBus protocol that allows users to communicate for status feedback, current limit setting, and fault protection control.

Features

ISL9016IRUCBZ-T has a good improved design, as compared with other linear voltage regulators. It is designed to be smaller and more efficient, with enhanced features. Its features mainly include:

• Trimmed 3A output over its entire input voltage range
• Integrated shutdown comparator for power savings
• Adjustable output voltage: 0.6V to 1.8V
• Small package size
• Advanced I2C interface

Applications

ISL9016IRUCBZ-T is mainly used in a variety of applications, such as mobile and portable applications, battery-powered applications, etc. These applications include:

• Digital video cameras
• Tablets and desktops
• Smart phones
• MP3 players
• Battery-powered laptops
• Bluetooth and other wireless technology
• Portable medical equipment

Working Principle

ISL9016IRUCBZ-T features a variable frequency, pulse width modulation (PWM) voltage regulator. This provides a high level of efficiency, by reducing the power loss due to power dissipation when the regulator is in operation. Unlike traditional linear voltage regulators, which employ linear or switch mode current sources to regulate the output voltage, this design uses a variable frequency PWM signal, to control the output voltage.

The PWM signal is generated by a voltage-controlled oscillator (VCO). This is an electronic circuit that produces a continuous train of pulses, the frequency and the width of each pulse being determined by the amplitude of a controlling voltage. This voltage is generated by comparing the voltage on the output of the PMIC with a reference voltage, using a special comparator circuit.

When the output voltage is above the reference, the comparator will switch “on” and the VCO will produce a pulse. This pulse will be used to turn “on” a transistor, which will reduce the input voltage and bring the output voltage back to the reference level. When the output voltage is below the reference, the comparator will switch “off” and the VCO will not generate a pulse. This will turn “off” the transistor, allowing more current to flow to the output, and bringing the output voltage back up to the reference level.

Therefore, the PWM signal will continuously adjust the current in the output stage, to ensure that the output voltage remains at the reference level. This is the basic working principle of the ISL9016IRUCBZ-T.

Conclusion

The ISL9016IRUCBZ-T is a step-down power management integrated circuit (PMIC) of linear voltage regulators (VR) from Renesas Co. It has a number of advantages, such as a small package size, improved power efficiency and advanced I2C interface capability. It is suitable for a variety of applications, such as mobile and portable applications, battery-powered applications and portable medical equipment. The working principle of this device is based on a variable frequency PWM voltage regulator, which allows it to adjust the current in the output stage, to regulate the output voltage.

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