Renesas ISL69144IRAZ-T

Overview

ISL69144IRAZ-T from Renesas Electronics is a digital dual-output, 4-phase PWM controller compliant with AMD SVI2 specifications, supporting flexible phase allocation (e.g., 3+1 or 2+2) across two outputs, operating up to 1 MHz, and featuring diode emulation, auto phase add/drop, and ±0.5% closed-loop voltage accuracy - deployed in high-performance AMD CPU core and GPU power delivery.

For engineers reviewing the ISL69144IRAZ-T datasheet, ISL69144IRAZ-T pinout, ISL69144IRAZ-T application, or ISL69144IRAZ-T equivalent, key selection considerations include SVI2 interface compliance, dual-rail programmable phase assignment, PMBus v1.3 support, differential remote sensing capability, and black-box fault logging for server and overclocking desktop platforms.

Technical Context

The ISL69144IRAZ-T implements a proprietary digital linear predictive current modulation scheme enabling zero-latency synthetic current control and dual-edge modulation for fast transient response. It supports configurable X+Y ≤ 4-phase operation with independent output control logic and SVI2/PMBus dual-interface arbitration.

Its fault management includes pulse-by-pulse phase current limiting, total output current protection, input/output OV/UV detection, open-sense detection, and a configurable Catastrophic Failure Flag (CFP) output - all managed via on-chip NVM-stored configurations.

Key Specifications

Pinout & Package

ISL69144IRAZ-T is housed in a 40-pin QFN package (6 mm × 6 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are defined per Renesas FN8708 Rev.4.00.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-output multiphase PWM controller applications.

Compared with ISL69144IRAZ-T, the ISL69134IRAZ-T omits dual-rail flexibility and SVI2, while the RT8803AGQW targets Intel VR13/VR14 instead of AMD SVI2 - making ISL69144IRAZ-T uniquely suited for AMD ecosystem power delivery where dual-rail coordination and SVI2 handshake are mandatory.

Availability

ISL69144IRAZ-T is available at Aetrix Electronics and suitable for high-performance server core rails, AMD GPU power delivery, and overclocking desktop VRMs requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for ISL69144IRAZ-T 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 delivering microcontrollers, analog, power, and SoC solutions for automotive, industrial, infrastructure, and PC applications.

The ISL69144IRAZ-T belongs to Renesas' digital multiphase PWM controller product line, engineered specifically for AMD SVI2-compliant CPU and GPU power delivery with emphasis on transient performance, configurability, and system-level fault resilience.

FAQ

What is the primary interface protocol supported by the ISL69144IRAZ-T?

The ISL69144IRAZ-T supports both AMD SVI2 and PMBus v1.3 interfaces. SVI2 enables direct bidirectional communication with AMD processors for dynamic voltage ID updates, while PMBus provides standardized configuration, telemetry, and fault reporting. Both interfaces operate concurrently, allowing host systems to use either or both depending on platform requirements. The ISL69144IRAZ-T implements full SVI2 timing compliance and 2 MHz PMBus clock support.

Does the ISL69144IRAZ-T support automatic phase shedding under light load?

Yes, the ISL69144IRAZ-T features automatic phase add/drop functionality that dynamically enables or disables phases based on real-time load current. This feature maintains high efficiency across the full 1–100% load range without requiring host intervention. The ISL69144IRAZ-T implements this using on-chip current estimation and configurable thresholds stored in NVM, ensuring seamless transitions between phase counts while preserving regulation stability.

Can the ISL69144IRAZ-T be used with DCR current sensing?

Yes, the ISL69144IRAZ-T supports DCR current sensing with integrated temperature compensation. It reads the voltage drop across the inductor's DCR and applies real-time gain correction using an on-die temperature sensor to maintain OCP accuracy across –40°C to +125°C. This eliminates the need for external thermistors or complex calibration, and the ISL69144IRAZ-T validates DCR sense performance in conjunction with ISL99227 smart power stages.

How many configuration profiles can be stored in the ISL69144IRAZ-T's NVM?

The ISL69144IRAZ-T includes on-chip NVM capable of storing up to eight independent configuration profiles. Each profile retains complete settings including phase assignment, voltage setpoints, loop compensation, fault thresholds, and interface parameters. These profiles persist across power cycles and can be selected dynamically via PMBus or SVI2 commands - enabling rapid reconfiguration for multi-mode operation without external memory.

What fault protection mechanisms does the ISL69144IRAZ-T provide?

The ISL69144IRAZ-T integrates comprehensive fault protection including pulse-by-pulse phase current limiting, total output current protection, input/output overvoltage and undervoltage detection, open voltage sense detection, and a configurable Catastrophic Failure Flag (CFP). It also features black-box fault logging that captures register states before critical events. All protections are independently configurable via PMBus or SVI2, and the ISL69144IRAZ-T asserts dedicated hardware flags for immediate system-level response.