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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Special Purpose Regulators

Renesas ISL6561IRZR5284

Name: ISL6561IRZR5284
Brand: Renesas
SKU: ISL6561IRZR5284
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ISL6561IRZR5284

Manufacturer:: Renesas

Category:: Special Purpose Regulators

Package:: 40-VFQFN Exposed Pad

Datasheet:: ISL6561IRZR5284.pdf

Description:: IC PWM CONTROLLER

Quantity:: RFQ Add To RFQ list

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Product details

Overview

ISL6561IRZR5284 from Renesas Electronics (formerly Intersil) is a 4-phase PWM controller for VR10.x microprocessor core voltage regulation, featuring precision r_DS(ON) or DCR differential current sensing, ±0.5% system accuracy over temperature/load/line, >4MHz ripple frequency, and integrated temperature compensation for droop stability. It drives synchronous buck channels in parallel for high-current CPU/GPU power delivery.

For engineers reviewing the ISL6561IRZR5284 datasheet, ISL6561IRZR5284 pinout, ISL6561IRZR5284 application, or ISL6561IRZR5284 equivalent, key selection considerations include multi-phase phase count configuration (2/3/4), r_DS(ON)/DCR sensing compatibility, VID voltage range (0.8375V–1.600V), thermal compensation interface (TCOMP), and QFN-40 package layout constraints.

Technical Context

The ISL6561IRZR5284 implements a multi-phase interleaved PWM architecture with independent channel current sampling during forced-off time (1/3 switching period), enabling precise per-channel current balancing and load-line programming. Its error amplifier features 80dB open-loop gain and 18MHz bandwidth, paired with a sawtooth oscillator (0.08–1.5MHz adjustable via FS resistor) and dynamic VID™ for seamless on-the-fly voltage transitions.

Current sensing operates via differential amplifiers on ISENx+/ISENx− pairs, supporting either MOSFET r_DS(ON) (grounded ISENx−, PHASE-referenced ISENx+) or inductor DCR (RC network-based) methods. Temperature compensation uses an internal thermal sensor and programmable TCOMP scaling to nullify r_DS(ON)/DCR drift, maintaining droop accuracy across −40°C to +85°C ambient.

Key Specifications

Parameter	Value and Actual Design Meaning
VCC Supply	5V ±5% or 12V via 300Ω resistor with internal 6.02V shunt clamp - enables dual-bias flexibility without external LDO.
VID Range	0.8375V to 1.600V in 12.5mV steps (6-bit input) - matches Intel VR10.x specifications for CPU core voltage programming.
System Accuracy	±0.5% over life, load, line, and temperature (0°C to 85°C) - ensures tight output regulation under dynamic CPU load transients.
Switching Frequency	Adjustable 0.08–1.5MHz via FS-to-ground resistor - supports high-frequency operation (>4MHz ripple) for reduced output capacitance.
Current Sensing	Differential r_DS(ON) or DCR sensing with ±1% sensed current tolerance (80μA nominal) - enables lossless, high-accuracy channel-current monitoring.
Thermal Compensation	Programmable TCOMP transconductance (1μA/V/°C) with internal temperature sensor - actively corrects droop error caused by MOSFET/inductor thermal drift.
OVP Threshold	VID + 200mV (typical), with latch and OVP pin drive capability - provides fast overvoltage protection without external comparators.

Pinout & Package

ISL6561IRZR5284 is housed in a RoHS-compliant 40-pin QFN package (6mm × 6mm, JEDEC MO-220 compliant), with exposed thermal pad for enhanced heat dissipation (θ_JA = 32°C/W, θ_JC = 3.5°C/W). The package supports high-density PCB layouts and improved thermal performance versus SOIC alternatives.

Pin/Terminal	Circuit Role	Design Meaning
VCC	Power supply input	Accepts 5V direct or 12V via series resistor; internal shunt regulator clamps at 6.02V max - simplifies bias design.
EN / ENLL	Enable control inputs	EN is threshold-sensitive (1.24V activation); ENLL (QFN-only) provides logic-level enable - enables coordinated startup with driver ICs.
PWM1–PWM4	Phase gate-drive outputs	Configurable 2/3/4-phase operation via PWM3/PWM4 tie-offs - determines interleaving pattern and channel count.
ISEN1+ to ISEN4−	Differential current sense inputs	Four independent differential pairs for r_DS(ON) or DCR sensing - supports per-channel current measurement and balancing.
TCOMP	Temperature compensation scaling	Resistor-to-ground sets compensation gain - directly adjusts droop correction based on thermal drift of MOSFETs/inductors.
IDROOP	Average current output	Provides analog current proportional to total load - connects to FB to implement precise load-line (droop) regulation.

Key Features

Feature	Design Value
Differential remote voltage sensing (VDIFF/VSEN/RGND)	Eliminates ground potential differences between controller and load - improves regulation accuracy and PGOOD timing fidelity.
Dynamic VID™ technology	Enables real-time VID changes without soft-start interruption - supports CPU frequency/voltage scaling (SpeedStep, Cool'n'Quiet).
Programmable reference offset (OFS pin)	Generates precise DC offset (485–515mV or 2.91–3.09V) independent of VID - allows fine-tuning of output voltage setpoint.
Integrated overvoltage/overcurrent protection	OVP pin drives external crowbar; no external components needed for fault detection - reduces BOM count and board area.
Unity-gain remote-sense amplifier	20MHz bandwidth with ±500μA output drive - maintains signal integrity for long PCB traces between VRM and CPU socket.

Applications

Server CPU Voltage Regulator	High-Performance GPU Power Delivery
Use Scenario: 4-phase VRM supplying 100A+ core voltage to dual-socket Xeon Scalable processors in 1U rack servers. IC Role / Device Role / Timing Role: Primary multi-phase PWM controller managing interleaved switching, current balancing, and VR10.x VID compliance. Use Value: >4MHz ripple frequency reduces output capacitor count by ~50% vs. single-phase designs; ±0.5% accuracy ensures CPU stability under rapid load transients.	Use Scenario: Compact 4-phase VRM powering NVIDIA A100 GPU core (0.8–1.0V @ 60A) in AI accelerator modules. IC Role / Device Role / Timing Role: Core voltage controller with DCR current sensing and thermal compensation for high-temp GPU environments. Use Value: TCOMP-driven droop correction maintains voltage positioning accuracy despite GPU junction temperature swings up to 105°C.
Workstation CPU Power Management	Embedded High-End FPGA Core Supply
Use Scenario: 3-phase VRM for AMD Threadripper PRO in professional workstations with aggressive thermal constraints. IC Role / Device Role / Timing Role: Multi-phase controller using r_DS(ON) sensing to eliminate DCR sense resistors and reduce component count. Use Value: Lossless current sensing lowers conduction losses and eliminates RC network calibration; ENLL enables synchronized enable sequencing with PMICs.	Use Scenario: 2-phase VRM delivering tightly regulated 0.85V core voltage to Xilinx Versal ACAP with dynamic partial reconfiguration. IC Role / Device Role / Timing Role: Precision PWM controller supporting Dynamic VID™ for real-time voltage scaling during FPGA bitstream loading. Use Value: Seamless VID transitions prevent logic corruption during reconfiguration; PGOOD timing aligns with FPGA configuration status signals.

Server CPU Voltage Regulator

High-Performance GPU Power Delivery

Use Scenario: 4-phase VRM supplying 100A+ core voltage to dual-socket Xeon Scalable processors in 1U rack servers.

IC Role / Device Role / Timing Role: Primary multi-phase PWM controller managing interleaved switching, current balancing, and VR10.x VID compliance.

Use Value: >4MHz ripple frequency reduces output capacitor count by ~50% vs. single-phase designs; ±0.5% accuracy ensures CPU stability under rapid load transients.

Use Scenario: Compact 4-phase VRM powering NVIDIA A100 GPU core (0.8–1.0V @ 60A) in AI accelerator modules.

IC Role / Device Role / Timing Role: Core voltage controller with DCR current sensing and thermal compensation for high-temp GPU environments.

Use Value: TCOMP-driven droop correction maintains voltage positioning accuracy despite GPU junction temperature swings up to 105°C.

Workstation CPU Power Management

Embedded High-End FPGA Core Supply

Use Scenario: 3-phase VRM for AMD Threadripper PRO in professional workstations with aggressive thermal constraints.

IC Role / Device Role / Timing Role: Multi-phase controller using r_DS(ON) sensing to eliminate DCR sense resistors and reduce component count.

Use Value: Lossless current sensing lowers conduction losses and eliminates RC network calibration; ENLL enables synchronized enable sequencing with PMICs.

Use Scenario: 2-phase VRM delivering tightly regulated 0.85V core voltage to Xilinx Versal ACAP with dynamic partial reconfiguration.

IC Role / Device Role / Timing Role: Precision PWM controller supporting Dynamic VID™ for real-time voltage scaling during FPGA bitstream loading.

Use Value: Seamless VID transitions prevent logic corruption during reconfiguration; PGOOD timing aligns with FPGA configuration status signals.

Equivalent & Alternatives

The following parts are listed as comparable options for similar multi-phase PWM controller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ISL6562IRZ	Same pinout and feature set but rated for 0°C to +70°C (vs. −40°C to +85°C); lacks ENLL pin.	Suitable for commercial-grade systems without extended temperature requirements or logic-level enable needs.	Select ISL6562IRZ only if ambient operating temperature stays within 0–70°C and ENLL functionality is unused.
RT8803AGQW	4-phase controller with integrated MOSFET drivers; no r_DS(ON)/DCR sensing - relies on external current-sense resistors.	Better suited for cost-sensitive designs where board space permits discrete sense resistors and driver integration is preferred.	Choose RT8803AGQW when driver integration reduces component count and r_DS(ON)/DCR sensing is not required for efficiency optimization.

Compared with ISL6561IRZR5284, ISL6562IRZ offers identical functionality at lower temperature grade and without ENLL, while RT8803AGQW trades sensing flexibility for driver integration - making ISL6561IRZR5284 optimal for thermally demanding, high-efficiency VR10.x applications requiring lossless current sensing.

Availability

ISL6561IRZR5284 is available at Aetrix Electronics and suitable for server CPU voltage regulation, high-performance GPU power delivery, workstation CPU management, embedded FPGA core supplies, and industrial computing platforms requiring stable component supply and long-term lifecycle support.

Supply support for ISL6561IRZR5284 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 Corporation acquired Intersil in 2017 and continues to support its high-performance analog and power management portfolio, including VR10.x-compliant controllers.

The ISL6561IRZR5284 belongs to Renesas' VR10.x multi-phase PWM controller product line, designed specifically for precision core voltage regulation in high-current microprocessor and GPU applications with stringent transient response and thermal stability requirements.

FAQ

What is the operating temperature range for the ISL6561IRZR5284?

The ISL6561IRZR5284 is specified for −40°C to +85°C ambient operation, validated per its Intersil datasheet FN9098 Rev 6.00. This extended industrial temperature range supports deployment in server, workstation, and embedded computing environments where thermal margins are critical. The device's integrated temperature compensation (TCOMP) function remains fully active across this full range to maintain droop accuracy.

How does the ISL6561IRZR5284 support both rDS(ON) and DCR current sensing?

The ISL6561IRZR5284 provides dedicated differential ISENx+/ISENx− pins per channel to support either method: for r_DS(ON), ISENx− connects to the lower MOSFET source and ISENx+ to the PHASE node via R_ISEN; for DCR, ISENx− ties to the RC sense network midpoint and ISENx+ connects through R_ISEN to the capacitor end. Both configurations deliver proportional current signals used for balancing, droop, and protection - confirmed in Figures 3–6 of the ISL6561IRZR5284 datasheet.

Can the ISL6561IRZR5284 be configured for fewer than four phases?

Yes, the ISL6561IRZR5284 supports 2-, 3-, or 4-phase operation via hardware configuration: tie PWM3 to VCC for 2-phase mode; tie PWM4 to VCC for 3-phase mode; leave both floating for default 4-phase operation. This flexibility is explicitly documented in the "PWM Operation" section (Page 12) and Pin Description (Page 10) of the ISL6561IRZR5284 datasheet, enabling optimized channel count for specific current and thermal requirements.

What is the purpose of the ENLL pin on the ISL6561IRZR5284?

The ENLL (Enable Logic Level) pin is exclusive to the QFN package variant (including ISL6561IRZR5284) and provides a CMOS-compatible logic-enable input that complements the threshold-sensitive EN pin. When asserted high, ISL6561IRZR5284 activates subject to POR and fault status; deasserting ENLL clears faults and primes soft-start. This dual-enable scheme enables robust power sequencing with driver ICs and PMICs - detailed in the Functional Pin Description (Page 10) of the datasheet.

Does the ISL6561IRZR5284 require external components for overvoltage protection?

No, the ISL6561IRZR5284 integrates overvoltage protection circuitry with a dedicated OVP pin capable of driving an external SCR or MOSFET crowbar device. Its OVP threshold is fixed at VID + 200mV (typical), and it latches upon detection - eliminating need for external comparators or voltage references. The datasheet confirms "No Additional External Components Needed" under Features (Page 1) and specifies OVP drive capability of 1.9V at −100mA (Page 9).

ISL6561IRZR5284 Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: -

Package/Case:: 40-VFQFN Exposed Pad

Packaging:: Bulk

Product Status:: Obsolete

Applications:: Controller, Intel VR10X

Voltage - Input:: 3V ~ 12V

Number of Outputs:: 1

Voltage - Output:: 0.84V ~ 1.65V

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 40-QFN (6x6)

ISL6561IRZR5284 FAQ

1.How can I place an order for ISL6561IRZR5284 through Aetrix?

Please submit a Request for Quotation (RFQ) for ISL6561IRZR5284 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for ISL6561IRZR5284 reliable?

The price and inventory of ISL6561IRZR5284 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6561IRZR5284 is usually 5 days.

3.What payment methods are accepted for ISL6561IRZR5284?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6561IRZR5284 transactions.

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4.How is shipping managed for ISL6561IRZR5284?

ISL6561IRZR5284 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ISL6561IRZR5284 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for ISL6561IRZR5284?

For technical support, including ISL6561IRZR5284 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6561IRZR5284 requirements.

6.How does Aetrix verify that ISL6561IRZR5284 is sourced from the original manufacturer or authorized distributors?

All ISL6561IRZR5284 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ISL6561IRZR5284 meets industry standards.

7.What is the process for return or replacement of ISL6561IRZR5284?

All ISL6561IRZR5284 units undergo pre-shipment inspection (PSI). If there is an issue with ISL6561IRZR5284, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The ISL6561IRZR5284 part is unused and in its original packaging.

Return procedure for ISL6561IRZR5284:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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