ISL80031AFRZ-T

Voltage Regulators - DC DC Switching Regulators Overview

The ISL80031AFRZ-T is a monolithic synchronous step-down DC/DC converter from Renesas Electronics Corporation. It delivers up to 3A of continuous output current from an input voltage range of 2.7V to 5.5V. The device utilizes peak current mode control architecture and operates at switching frequencies of 1MHz or 2MHz. It features a quiescent current of 35µA, integrates low rDS(ON) PMOS high-side and NMOS low-side MOSFETs, and eliminates the need for a bootstrap capacitor. The converter supports 100% duty cycle operation and includes comprehensive protection mechanisms such as overcurrent, short-circuit, over-temperature, undervoltage lockout, and overvoltage protection.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Configured for PFM discontinuous conduction mode to maximize efficiency by reducing switching losses at light loads
• Integrates a PMOS high-side MOSFET that removes the requirement for external bootstrap capacitors
• Provides fast transient response through peak current mode control architecture
• Includes internal soft-start and soft-stop functionality with power-good indication

Voltage Regulators - DC DC Switching Regulators Applications

• Client devices requiring efficient power management
• Portable consumer electronics
• Battery-powered systems
• Industrial equipment with limited space constraints

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'FRZ' against official Renesas documentation to confirm package type and tape-and-reel specifications. Ensure the operating temperature range aligns with system requirements. Confirm RoHS compliance status directly with the manufacturer datasheet. Validate pin compatibility if replacing existing designs. Check for any recent revisions to the FN8766 document that may affect electrical characteristics.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when high efficiency at light loads is critical due to its PFM configuration. Choose this part over PWM variants like the ISL80030 when minimizing standby power consumption is a priority. Consider the 2x2mm DFN package for applications with strict board space limitations. Verify that the 3A output current capability meets the maximum load requirements of the target circuit design.

Voltage Regulators - DC DC Switching Regulators Part Context

The ISL80031 belongs to the ISL80030x/ISL80031x family of highly efficient synchronous buck converters. This family shares common architectural features including peak current mode control and integrated power switches. The ISL80031 variant specifically differs from the ISL80030 by employing PFM operation for improved light-load efficiency, whereas the ISL80030 uses PWM for faster transient response.

Voltage Regulators - DC DC Switching Regulators FAQ

Does the ISL80031 require a bootstrap capacitor?

No, the ISL80031 uses a PMOS high-side MOSFET which eliminates the need for a bootstrap capacitor.

What modulation scheme does the ISL80031 use?

The ISL80031 is configured for PFM (Pulse Frequency Modulation) discontinuous conduction operation.