Renesas ISL91302BIKZT7AR5852

Overview

ISL91302BIKZT7AR5852 from Renesas Electronics is a dual/single-output synchronous multiphase buck PMIC with four integrated power stages and two controllers, supporting 4+0, 3+1, or 2+2 phase configurations. It delivers up to 5A per phase, operates from 2.5V–5.5V input, achieves 94.7% peak efficiency at 3.8V_IN/1.8V_OUT, and features R5 modulator technology for ultra-fast transient response-targeted at CPU/GPU core power in mobile SoC designs.

For engineers reviewing the ISL91302BIKZT7AR5852 datasheet, ISL91302BIKZT7AR5852 pinout, ISL91302BIKZT7AR5852 application, or ISL91302BIKZT7AR5852 equivalent, key selection criteria include its factory-programmable OTP configuration, ±0.7% system accuracy with remote sensing, 2–6MHz programmable PWM frequency, dual independent DVS control, and 54-ball 0.4mm-pitch WLCSP package.

Technical Context

The ISL91302BIKZT7AR5852 implements Renesas' proprietary R5 modulator architecture, enabling seamless transitions between discontinuous (DCM) and continuous conduction mode (CCM) without external compensation while maintaining loop stability and sub-1µs load-step response. Its dual-controller topology supports dynamic reassignment of four power stages across output rails.

Configuration is fixed at factory via OTP, defining output topology (4+0/3+1/2+2), PWM frequency (2–6MHz), and I/O pin modes (SPI/I²C/DVS/ADC). Telemetry includes voltage, current, and temperature sensing via integrated 10-bit ADC with auxiliary inputs, and fault protection covers UV/OV/OC/OT with short-circuit response.

Key Specifications

Pinout & Package

ISL91302BIKZT7AR5852 uses a 2.551mm × 3.670mm, 54-ball WLCSP package with 0.4mm pitch, optimized for ultra-compact mobile PCBs and requiring controlled thermal land patterns per JEDEC J-STD-020.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar multiphase buck PMIC applications.

Compared with ISL91301B and ISL91211B, the ISL91302BIKZT7AR5852 uniquely combines 5A-per-phase capability, R5 modulator-enabled ultra-fast transients, factory OTP-configurable topology, and integrated telemetry - making it optimal for high-performance mobile and embedded SoC core power where dynamic scaling and precision regulation are critical.

Availability

ISL91302BIKZT7AR5852 is available at Aetrix Electronics and suitable for smartphone application processor core power, FPGA core and auxiliary rail power, and industrial MPU power supply requiring stable component supply across high-volume production cycles.

Supply support for ISL91302BIKZT7AR5852 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Renesas Electronics is a global semiconductor leader specializing in microcontrollers, analog, power management, and SoC solutions for automotive, industrial, and consumer markets.

The ISL91302B product line delivers highly integrated, configurable multiphase buck PMICs designed specifically for dynamic core power in mobile and edge computing SoCs - emphasizing efficiency, transient performance, and system-level telemetry.

FAQ

What output configurations does the ISL91302BIKZT7AR5852 support?

The ISL91302BIKZT7AR5852 supports three factory OTP-configured output topologies: 4-phase single output (4+0), 3-phase + 1-phase dual output (3+1), or dual 2-phase outputs (2+2). Each configuration assigns the four integrated power stages to meet specific SoC rail requirements - for example, 3+1 suits CPU+GPU partitioning, while 2+2 fits symmetric dual-core processors. The configuration is fixed at manufacturing and cannot be changed in-system.

How does the R5 modulator in the ISL91302BIKZT7AR5852 improve transient response?

The R5 modulator in the ISL91302BIKZT7AR5852 enables sub-1µs load-step response by eliminating traditional voltage-mode or current-mode compensation networks. It dynamically adjusts duty cycle based on real-time error and slew rate, ensuring stable operation across DCM/CCM boundaries without external components. This architecture directly contributes to the ISL91302BIKZT7AR5852's ability to sustain ±24.6mV output deviation during 10A/µs transients - critical for modern low-voltage SoC cores.

What is the role of remote sensing (VOUT1/RTN1 and VOUT2/RTN2) in the ISL91302BIKZT7AR5852?

Remote sensing via VOUT1/RTN1 and VOUT2/RTN2 allows the ISL91302BIKZT7AR5852 to measure voltage directly at the load point, compensating for IR drop across PCB traces. This closed-loop Kelvin connection enables ±0.7% system-level output accuracy - significantly tighter than typical local-sense PMICs - and is essential for maintaining specification compliance in high-current, low-voltage applications like 0.85V FPGA cores where even 10mΩ trace resistance causes measurable regulation error.

Can the ISL91302BIKZT7AR5852 operate with only one output enabled?

Yes, the ISL91302BIKZT7AR5852 can operate with only one output active - for example, in 4+0 mode where Buck #1 delivers full 4-phase power and Buck #2 is disabled, or in 3+1 mode where Buck #2 runs at 1-phase while Buck #1 remains inactive. Output enable is controlled via register bits BUCK1_EN[0] and BUCK2_EN[0]; disabling an output reduces quiescent current (e.g., to 75µA in DCM) and halts switching on associated phases, improving light-load efficiency.

What interfaces does the ISL91302BIKZT7AR5852 support for programming and telemetry?

The ISL91302BIKZT7AR5852 supports both SPI (up to 26MHz) and I²C (up to 3.4MHz) interfaces via MPIO0–MPIO3 pins, configurable through OTP. These interfaces allow full read/write access to all registers - including output voltage, DVS settings, telemetry data (voltage/current/temperature), and fault status. The integrated 10-bit ADC feeds telemetry values directly into registers, enabling host software to monitor system health without external sensors.