ISL85403EVAL2Z

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The ISL85403EVAL2Z is an evaluation board used to evaluate the performance of the ISL85403 synchronous rectified buck PWM controller. It helps the user study the features and operation of the controller under lab condition. The ISL85403EVAL2Z contains all the essential components to build a basic regulated buck power converter.

The ISL85403EVAL2Z application field covers general purpose buck regulator applications. It is designed to provide a regulated output voltage of up to 3.3V with an input supply range of 4.5V to 28V for various DC/DC and AC/DC power supply applications. The ISL85403EVAL2Z board operates in the PWM mode with an adjustable switching frequency of up to 1 MHz.

The ISL85403EVAL2Z works with the synchronous rectified topology, where two low-side MOSFETs are connected in parallel, providing higher current handling capability. It offers an adjustable soft-start function to condition the circuit inrush current when the system is first powered-up. The output voltage is monitored and buffered through the opto-isolator for protection, and it can be programmed through the external level shifter and ADC.

The ISL85403EVAL2Z also provides several monitoring features to debug and optimize the operation, including a voltage error amplifier, an output current sense amplifier, and a temperature monitor with overtemperature detection. The ISL85403EVAL2Z also includes a variable-output voltage feature for better control of the output voltage.

In summary, the ISL85403EVAL2Z evaluation board is a complete solution for evaluating the performance of the ISL85403 synchronous rectified buck PWM controller in DC/DC and AC/DC power supply applications. It features an adjustable soft-start for better inrush current control, an opto-isolator for output voltage protection, and a variable-output voltage feature for better control of the output voltage. It also provides several monitoring features for debugging and optimizing its operation.

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