ISL85001IRZ

Voltage Regulators - DC DC Switching Regulators Overview

The ISL85001IRZ is a high-performance standard buck PWM regulator featuring an integrated switching power MOSFET and boot diode. It provides a single, high-frequency power solution for point-of-load applications with a fixed 5V input voltage tolerance of ±10%. The device delivers a continuous output current up to 2A, with an adjustable output voltage range from 0.6V to 19V. It operates at a fixed switching frequency of 500kHz using voltage mode control with voltage feed forward. The component includes comprehensive protection features such as overcurrent, undervoltage, and thermal overload protection, along with an internal 5V LDO regulator.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a 2A standard buck PWM controller with a switching N-Channel power MOSFET and requires an external Schottky diode.
• Utilizes simple voltage mode control with input voltage feed forward to minimize solution size and provide flexibility in component selection.
• Includes integrated protection mechanisms for overcurrent, undervoltage, and thermal overload conditions.
• Features a Power Good (PGOOD) output signal to indicate loss of regulation on the PWM output.

Voltage Regulators - DC DC Switching Regulators Applications

• General Purpose WLAN Cards
• PCMCIA, Cardbus32, MiniPCI Cards
• Compact Flash Cards
• Hand-Held Instruments
• LCD Panel Set-top Box

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'IRZ' against the manufacturer's official documentation to confirm package type and RoHS compliance status. Confirm availability as the base model ISL8500 is listed as obsolete; ensure the IRZ variant is actively supported or identify the designated replacement product ISL85003 if necessary. Validate pinout compatibility before integration into existing designs.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component for applications requiring a compact, high-efficiency power solution with integrated switching capabilities. The fixed 500kHz frequency allows for smaller passive components compared to lower-frequency alternatives. Ensure the design accommodates the requirement for an external Schottky diode. Consider the 4mm x 3mm DFN package constraints for thermal management and PCB layout when targeting high-current outputs near the 2A limit.

Voltage Regulators - DC DC Switching Regulators Part Context

The ISL85001IRZ belongs to the ISL8500 series of standard buck regulators from Renesas (formerly Intersil). This series is designed to simplify power supply designs by integrating the controller and primary switch. It targets portable and space-constrained electronics where efficiency and board area are critical. The family emphasizes ease of use through voltage mode control and built-in protection features.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

The source document identifies ISL85003 as the efficient 3A synchronous buck regulator replacement for the ISL8500 series. Verify if the higher current capacity and synchronous architecture of the ISL85003 are compatible with the existing design requirements and bill of materials.

Voltage Regulators - DC DC Switching Regulators FAQ

Does the ISL85001IRZ require an external diode?

Yes, the PWM controller drives an internal switching N-Channel power MOSFET and requires an external Schottky diode to generate the output voltage.

What control method does the ISL85001IRZ use?

It utilizes simple voltage mode control with voltage feed forward to provide flexibility in component selection and minimize solution size.