ISL91302BIKZT7AR5851

Voltage Regulators - DC DC Switching Regulators Overview

The ISL91302B is a highly efficient, dual or single output, synchronous multiphase buck switching regulator that can deliver up to 5A per phase continuous output current. The device features four integrated power stages and has the capability to assign its power stages to either output. This flexibility allows seamless design-in for a wide range of applications where dual, triple, or quad phase outputs are needed, such as CPU and GPU core power mobile applications. The ISL91302B features integrated low ON-resistance MOSFETs, programmable PWM frequency, and automatic diode emulation, which maximizes efficiency while minimizing the external component count and solution size.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Supports flexible output configurations including dual output (3+1 or 2+2) or single output (4-phase) modes.
• Delivers ultra-fast transient response with less than 150μF nominal output capacitance using R5 modulator technology.
• Enables independent Dynamic Voltage Scaling (DVS) for each output via I2C and SPI interfaces.
• Provides voltage, current, and temperature telemetry through an integrated ADC plus auxiliary inputs.

Voltage Regulators - DC DC Switching Regulators Applications

• CPU and GPU core power in mobile applications
• Powering application processors in smartphones and tablets
• AI processor power management
• Industrial MPU and FPGA power supplies

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'R5851' against official Renesas documentation to confirm pin-to-pin compatibility and factory OTP programming settings. Ensure the package type matches the required PCB layout constraints. Confirm the operating temperature range and electrical specifications align with the target system requirements before finalizing procurement.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a compact solution size is critical, requiring only 12 components for a 4-phase design. It is suitable for designs needing high efficiency (94% peak) and fast transient response without external compensation. Consider this part if independent DVS control and telemetry monitoring are required for complex multi-rail systems.

Voltage Regulators - DC DC Switching Regulators Part Context

The ISL91302B belongs to Renesas's family of programmable power management ICs designed for high-density power delivery. It utilizes proprietary R5 modulator technology to achieve excellent loop stability and seamless transitions between discontinuous and continuous conduction modes. This series targets the demanding power needs of modern portable electronics and industrial computing devices.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material. Verify compatibility with existing designs by checking electrical parameters and pinout definitions against alternative components from the same manufacturer or other vendors.

Voltage Regulators - DC DC Switching Regulators FAQ

What output configurations does the ISL91302B support?

It supports dual output configurations (3+1 or 2+2 phases) or a single output configuration (4 phases).

How does the ISL91302B handle load transients?

It supports 50A/μs per phase transients with less than 150μF nominal output capacitance due to its R5 modulator technology.