Description:The ISL6721A is a low power, single-ended pulse width modulating (PWM) current mode controller designed for a wide range of DC/DC conversion applications including boost, flyback, and isolated output configurations. Peak current mode control effectively handles power transients and provides inherent overcurrent protection. Other features include a low power mode where the supply current drops to less than 200µA during overvoltage and overcurrent shutdown faults. It differs from the ISL6721 in that the UVLO
A good PCB layout for the ISL6721AAVZ should prioritize noise reduction and thermal management. Keep the switching node (SW pin) away from sensitive analog nodes, and use a solid ground plane to reduce EMI. Place the input capacitors close to the VIN pin, and ensure good thermal conduction from the IC to the PCB.
Choose input capacitors with low ESR and high ripple current rating to handle the input voltage ripple. For output capacitors, select ones with low ESR and high capacitance to ensure good output voltage regulation. The datasheet provides guidelines for capacitor selection, but consider factors like operating frequency, output current, and ambient temperature when making your selection.
The ISL6721AAVZ is rated for operation from -40°C to +125°C, but the maximum ambient temperature range depends on the specific application and cooling conditions. Ensure that the IC's junction temperature (TJ) does not exceed 150°C to maintain reliability and performance.
The ISL6721AAVZ has a built-in overcurrent protection feature that can be enabled by connecting a resistor from the OC pin to GND. The resistor value determines the overcurrent threshold. You can also use an external circuit to implement more sophisticated overcurrent protection schemes, such as foldback current limiting or latch-off protection.
Yes, the ISL6721AAVZ can be used in a synchronous buck converter configuration. However, you'll need to add an external low-side FET and a Schottky diode to implement the synchronous rectification function. Ensure that the external FET is properly driven and that the Schottky diode is rated for the expected reverse voltage and current.
Trust Checks
This model has been built in collaboration with the manufacturer.
Manufacturer Collaborated
This model has been verified by system checks.
System Verified
This model has been reviewed by community users.
Community Approved
Sponsored
ISL6721AAVZ Overview
Use the download button to access the ISL6721AAVZ schematic symbol, PCB footprint, and 3D model.
To find more CAD model downloads similar to this part, try a partial part number search, like ISL67,
or try a keyword search, such as Switching Regulator or Controllers
