Description:The ISL98607 is a high efficiency power supply for small size displays, like smart phones, requiring ±supply rails. It integrates boost regulator, LDO, and inverting charge pump that are used to generate two output rails: +5V (default) and -5V (default). The ±5V output voltages can be adjusted up to ±5. 7V with 50mV steps using the I2C interface. The ISL98607 integrates synchronous rectification MOSFETs for the boost regulator and inverting charge pump, which maximizes conversion efficiency. The ISL98607 in
Renesas provides a recommended PCB layout guide in their application note AN1995, which includes guidelines for thermal vias, copper pours, and component placement to minimize thermal resistance and ensure optimal performance.
The selection of input and output capacitors depends on the specific application requirements, such as ripple current, voltage rating, and ESR. Renesas recommends using X5R or X7R ceramic capacitors with a voltage rating of at least 1.5 times the maximum input voltage, and an ESR of less than 10 mohms. The application note AN1995 provides more detailed guidance on capacitor selection.
The maximum ambient temperature for the ISL98607IRTZ-T is 105°C, but it can be derated to 85°C for high-reliability applications. It's essential to consider the thermal design and heat sinking to ensure the device operates within the recommended temperature range.
The ISL98607IRTZ-T has a built-in overcurrent protection feature that can be enabled by connecting the OCP pin to a resistor and capacitor network. The application note AN1995 provides a detailed example of how to implement overcurrent protection, including the calculation of the OCP threshold and timing.
The recommended input voltage range for the ISL98607IRTZ-T is 2.7V to 5.5V, but it can operate down to 2.5V with reduced performance. It's essential to ensure the input voltage is within the recommended range to maintain the device's performance and reliability.
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ISL98607IRTZ-T Overview
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