Description:The ISL8024 is a highly efficient, monolithic, synchronous step-down DC/DC converter that can deliver 4A of continuous output current from a 2.7V to 5.5V input supply. The device uses current mode control architecture to deliver very low-duty cycle operation at high frequency with fast transient response and excellent loop stability. It has an adjustable frequency from 500kHz to 4MHz with the default at 1MHz (ISL8023/24).The ISL8023 and ISL8024 integrate a very low On-resistance P-Channel (45mΩ) high side F
Renesas provides a recommended PCB layout guide in their application note AN1965, which includes guidelines for thermal vias, copper pours, and component placement to minimize thermal resistance and ensure optimal performance.
To ensure reliable start-up and shutdown, it's recommended to follow the power-up and power-down sequencing guidelines outlined in the datasheet, and to use a soft-start circuit to limit inrush current. Additionally, a capacitor should be placed between the VIN and GND pins to filter out noise and ensure stable operation.
The ISL8024IRTAJZ-T can drive a maximum capacitive load of 10uF. Exceeding this limit may cause instability or oscillation in the output voltage. If a larger capacitive load is required, an additional output capacitor can be added, but the total capacitance should not exceed 10uF.
The output voltage of the ISL8024IRTAJZ-T can be adjusted by using a resistive divider network between the VOUT pin and the GND pin. The resistors should be chosen to provide a stable output voltage within the desired range, and the total resistance should be kept below 10kΩ to ensure stability.
Renesas recommends using a high-quality, low-ESR ceramic capacitor with a value of 10uF to 22uF between the VIN pin and the GND pin. This capacitor helps to filter out noise and ripple on the input voltage and ensures stable operation.
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ISL8024IRTAJZ-T Overview
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