Description:The ISL98608 and ISL98608IIH are high efficiency power supplies for small size displays, such as smart phones and tablets requiring ±supply rails. They integrate a boost regulator, LDO, and inverting charge pump that are used to generate two output rails: +5. 5V and -5. 5V (ISL98608) and +5V and -5V (ISL98608IIH). The output voltages can be adjusted from ±4. 5V up to ±7V with 50mV steps using the I2C interface. The devices integrate synchronous rectification MOSFETs for the boost regulator and inverting cha
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 requirements of your application, including the input voltage, output voltage, and output current. Renesas provides guidelines for capacitor selection in their application note AN1994, which includes recommendations for capacitor type, value, and ESR.
The maximum junction temperature for the ISL98608II55Z-T is 150°C, as specified in the datasheet. However, it's recommended to keep the junction temperature below 125°C for optimal reliability and performance.
The ISL98608II55Z-T has built-in overcurrent protection and short-circuit protection features. To implement these features, you need to connect the OCP pin to a resistor and capacitor network, and the SCP pin to a resistor network, as described in the datasheet and application notes.
The recommended startup sequence for the ISL98608II55Z-T is to first apply the input voltage, then the enable signal, and finally the output voltage. This sequence ensures that the device starts up correctly and avoids any potential damage or malfunction.
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ISL98608II55Z-T Overview
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