Description:The ISL68134 is a digital dual output, flexible multiphase (X+Y ≤ 4) PWM controller with Adaptive Voltage Scaling interface (AVSBus). Either output can be configured to support any desired phase assignments up to a maximum of four phases across the two outputs (X+Y). For example, 3+1, 2+2, 2+1, or even a single output operation as a 4+0 configuration are supported. The flexible phase arrangement, combined with PMBus and AVSBus interfaces, allows the device to support any demanding power supply requirement.
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 reliable operation.
The ISL68134IRAZ is a highly configurable device, and the voltage rails can be configured using the I2C interface. Renesas provides a configuration tool, the PowerNavigator software, which allows users to easily configure the device for different voltage rails and monitor its performance.
The maximum current rating for each phase is dependent on the specific application and operating conditions. While the datasheet provides some guidance, it's recommended to consult with Renesas' application engineers or refer to the device's thermal design guide to determine the maximum current rating for a specific use case.
The ISL68134IRAZ has built-in OCP and OVP features that can be configured using the I2C interface. Renesas provides detailed guidance on implementing these features in their application note AN1964, which includes examples and equations for setting the OCP and OVP thresholds.
Renesas recommends using a combination of ceramic and electrolytic capacitors for decoupling, with a total capacitance of at least 220uF per phase. The application note AN1965 provides more detailed guidance on decoupling capacitor selection and placement.
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ISL68134IRAZ Overview
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