ISL91301BIIZ-T

Voltage Regulators - DC DC Switching Regulators Overview

The ISL91301BIIZ-T is a quad-output programmable power management IC (PMIC) from Renesas. It integrates four synchronous buck converters in a single-phase configuration, delivering up to 3A per phase for supply voltages between 2.5V and 5.5V. The device features a compact 42-ball WLCSP package with a footprint of 6x8mm². Key electrical specifications include ±0.7% system accuracy with remote voltage sensing, programmable PWM frequency ranging from 2MHz to 6MHz, and independent dynamic voltage scaling (DVS) for each output. Output voltages are adjustable from 0.3V to 2V via I²C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates four highly efficient synchronous buck converters capable of multiphase and single-phase operations.
• Features automatic diode emulation and pulse skipping modes under light-load conditions to maximize battery life.
• Includes integrated low on-resistance MOSFETs and programmable PWM frequency for small external component sizes.
• Provides robust protection through soft-start, UV/OV/OC/OT fault detection, and short-circuit protection.

Voltage Regulators - DC DC Switching Regulators Applications

• Portable electronic devices requiring high output power and small solution size
• Battery-powered systems needing extended operational life
• Applications requiring independent dynamic voltage scaling for multiple rails

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'IIZ-T' against official Renesas documentation to confirm tape-and-reel packaging and temperature grade. Ensure compatibility with the required 42-ball WLCSP 0.4mm pitch footprint during PCB layout. Confirm that the 2.5V to 5.5V input range aligns with the system's power supply architecture before finalizing procurement.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this PMIC when designing space-constrained portable electronics that require four independent regulated outputs. It is suitable for applications where high efficiency at light loads is critical for battery longevity. Consider the 3A per phase capability for wider input voltage ranges if the design operates below 2.8V. Ensure the controller supports the necessary I²C interface for programmable voltage settings.

Voltage Regulators - DC DC Switching Regulators Part Context

The ISL91301B belongs to Renesas' portfolio of programmable power management ICs designed for mobile and portable applications. It complements other power solutions by offering a flexible multi-output architecture within a minimal footprint. This series targets designers seeking to reduce board space while maintaining high performance and efficiency in battery-operated devices.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Check for pin-compatible alternatives within the Renesas PMIC family that offer similar output configurations. Verify that any substitute maintains the 42-ball WLCSP package and supports the required 2.5V to 5.5V input range. Ensure equivalent protection features and DVS capabilities are present in potential replacement parts.

Voltage Regulators - DC DC Switching Regulators FAQ

What is the maximum current output per phase for the ISL91301B?

The device delivers up to 3A per phase for supply voltages between 2.5V and 5.5V, and up to 4A per phase for supply voltages between 2.8V and 5.5V.

How is the output voltage controlled?

The output voltage is programmable from 0.3V to 2V via an I²C interface, allowing for independent dynamic voltage scaling (DVS) for each output.

What protection features are integrated into the ISL91301B?

The IC includes soft-start, undervoltage lockout (UV), overvoltage protection (OV), overcurrent protection (OC), overtemperature protection (OT), and short-circuit protection.