Description:The ISL6236A dual step-down, switch-mode power-supply (SMPS) controller generates logic-supply voltages in battery-powered systems. The ISL6236A includes two pulse-width modulation (PWM) controllers, 5V/3. 3V and 1. 5V/1. 05V. The output of SMPS1 can also be adjusted from 0. 7V to 5. 5V. The SMPS2 output can be adjusted from 0V to 2. 5V by setting REFIN2 voltage. An optional external charge pump can be monitored through SECFB. This device features a linear regulator providing 3. 3V/5V, or adjustable from 0.
The recommended PCB layout for optimal performance involves keeping the power traces short and wide, using a solid ground plane, and placing the input and output capacitors close to the IC. Additionally, it's recommended to use a 4-layer PCB with a dedicated power plane and a dedicated ground plane.
The selection of input and output capacitors depends on the specific requirements of your application. In general, it's recommended to use low-ESR capacitors with a high ripple current rating. The input capacitor should be able to handle the input voltage and current, while the output capacitor should be able to handle the output voltage and current. The datasheet provides guidelines for capacitor selection, but it's recommended to consult with a capacitor manufacturer for specific recommendations.
The maximum ambient temperature for reliable operation of the ISL6236AIRZ-T is 85°C. However, the device can operate up to 105°C with derating. It's recommended to consult the datasheet for thermal derating curves and to ensure that the device is properly heatsinked for high-temperature operation.
The ISL6236AIRZ-T has built-in OVP and UVP features. OVP is implemented by connecting a resistor divider network from the input voltage to the OVP pin, while UVP is implemented by connecting a resistor divider network from the input voltage to the UVP pin. The datasheet provides guidelines for setting the OVP and UVP thresholds, and it's recommended to consult with a Renesas application engineer for specific implementation details.
The recommended input voltage range for the ISL6236AIRZ-T is 4.5V to 28V. However, the device can operate up to 30V with reduced performance. It's recommended to consult the datasheet for input voltage derating curves and to ensure that the device is properly designed for the specific input voltage range.
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ISL6236AIRZ-T Overview
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