My Inquiry
My Account
Renesas ISL6561IRZ-T
- Part No.:
- ISL6561IRZ-T
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
ISL6561IRZ-T.pdf
- Description:
- IC REG CTRLR INTEL 4OUT 40QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,532
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ISL6561IRZ-T from Renesas (formerly Intersil) is a 4-phase PWM controller for microprocessor core voltage regulation, supporting rDS(ON) or DCR current sensing, ±0.5% system accuracy over temperature/load/line, >4MHz ripple frequency, and VR10.x compliance. It drives synchronous buck converters in high-performance computing power supplies.
For engineers reviewing the ISL6561IRZ-T datasheet, ISL6561IRZ-T pinout, ISL6561IRZ-T application, or ISL6561IRZ-T equivalent, key selection criteria include multi-phase phase count configuration (2/3/4), temperature-compensated droop accuracy, remote differential voltage sensing, and compatibility with HIP6601B-type gate drivers in Intel VR10.x platforms.
Technical Context
The ISL6561IRZ-T 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 internal DAC supports 6-bit VID input (0.8375V–1.600V in 12.5mV steps) with Dynamic VID™ for on-the-fly voltage changes.
Current sensing uses either MOSFET rDS(ON) or inductor DCR methods, both enhanced by programmable temperature compensation via TCOMP pin and internal thermal sensing. The error amplifier features 80dB open-loop gain and 18MHz bandwidth, while the remote-sense amplifier provides 20MHz bandwidth and eliminates ground potential differences between load and controller.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Phase Count | Configurable 2-, 3-, or 4-phase operation via PWM3/PWM4 pin strapping |
| Output Voltage Range | 0.8375V to 1.600V in 12.5mV steps; supports VR10.x microprocessor VID protocols |
| System Accuracy | ±0.5% over life, load, line, and temperature (0°C to 85°C); enables tight droop control |
| Ripple Frequency | >4MHz effective output ripple frequency (interleaved 4-phase); reduces output capacitor count and size |
| Current Sensing | Differential rDS(ON) or DCR sensing with integrated temperature compensation; eliminates external thermistors in many designs |
| Remote Sensing | Unity-gain differential VSEN/RGND amplifier; removes PCB ground path errors for improved regulation accuracy |
| Protection Features | Programmable overvoltage (180–220mV above VID), undervoltage lockout, and cycle-by-cycle overcurrent protection |
Pinout & Package
ISL6561IRZ-T is housed in a RoHS-compliant 40-pin QFN package (6mm × 6mm, 0.5mm pitch) with exposed thermal pad, per JEDEC MO-220 QFN outline L40.6x6. The package supports high-power density layouts and efficient thermal dissipation (θJC = 3.5°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power supply input | Accepts 5V direct or 12V via 300Ω limiting resistor; internal shunt regulator clamps at 6.02V max |
| EN / ENLL | Enable control inputs | EN is threshold-sensitive (1.24V activation); ENLL is logic-level enable (QFN-only); both required for fault reset and soft-start priming |
| PWM1–PWM4 | Phase drive outputs | Open-drain PWM signals for gate drivers; phase count set by strapping PWM3/PWM4 to VCC or GND |
| ISEN1+ to ISEN4− | Differential current sense inputs | Four independent channels support rDS(ON) (source-referenced) or DCR (RC-network referenced) sensing |
| VDIFF / VSEN / RGND | Remote voltage sensing interface | VSEN/RGND form differential input; VDIFF is single-ended output fed to regulation and protection circuitry |
| TCOMP | Temperature compensation scaling | Resistor-to-ground sets transconductance (1μA/V/°C typical); adjusts droop current for rDS(ON)/DCR thermal drift |
| OFS | Offset programming | Generates dc offset current (485–515mV or 2.91–3.09V) for precise load-line tuning independent of VID setting |
| IDROOP | Average current output | Sinks current proportional to total load; connected to FB to implement programmable droop via external resistor |
Key Features
| Feature | Design Value |
|---|---|
| Dynamic VID™ technology | Enables seamless real-time VID changes without output disruption; critical for CPU frequency/voltage scaling |
| Programmable temperature compensation | Nullifies rDS(ON) or DCR thermal drift using internal sensor and TCOMP pin; maintains droop accuracy across -40°C to +85°C |
| Differential remote voltage sensing | Eliminates IR drop errors from PCB ground paths; improves regulation accuracy and PGOOD timing precision |
| Integrated shunt regulator | Supports 5V or 12V bias with only a 300Ω external resistor; removes need for auxiliary LDO in 12V-input systems |
| Channel-current balancing | Uses sampled per-phase currents to equalize load distribution across active phases; prevents thermal imbalance and extends MOSFET lifetime |
Applications
| Server CPU Core Power | Workstation GPU Core Supply |
|---|---|
Use Scenario: Regulating core voltage for dual-socket Xeon Scalable processors under dynamic 200A+ transient loads. IC Role / Device Role / Timing Role: 4-phase VR10.x controller coordinating with HIP6601B gate drivers; manages droop, current balance, and OVP response within <100ns. Use Value: >4MHz ripple frequency reduces bulk capacitance by ~60% vs. single-phase; ±0.5% accuracy ensures CPU stability at 3GHz+. | Use Scenario: Delivering tightly regulated 0.8–1.2V to high-end NVIDIA A100 GPU cores with fast di/dt transients. IC Role / Device Role / Timing Role: Multi-phase PWM controller implementing DCR current sensing and Dynamic VID™ for GPU voltage/frequency scaling. Use Value: Temperature-compensated droop maintains voltage position across junction temp swings; remote sensing rejects board-level ground noise. |
| High-End Desktop Motherboard VRM | AI Accelerator Board Power |
Use Scenario: Supporting AMD Ryzen Threadripper CPUs with adaptive voltage positioning and multi-GPU load sharing. IC Role / Device Role / Timing Role: Configurable 3-phase controller using rDS(ON) sensing; interfaces with 6-bit VID from chipset and monitors PGOOD for BIOS handoff. Use Value: EN/ENLL dual-enable logic synchronizes startup with chipset POR; OFS pin enables fine-tuned load-line slope for overclocking headroom. | Use Scenario: Powering heterogeneous AI inference chips (e.g., Habana Gaudi) requiring simultaneous 0.75V/1.8V rails with coordinated sequencing. IC Role / Device Role / Timing Role: Primary core controller managing 4-phase buck with external NTC thermistor for enhanced thermal compensation in dense thermal envelopes. Use Value: Integrated OVP pin drives crowbar SCR directly; eliminates discrete protection IC and saves PCB area in space-constrained modules. |
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-T | Same pinout and feature set but rated for 0°C to 70°C ambient (vs. -40°C to 85°C); lacks ENLL pin | Targeted at commercial-grade desktop motherboards; not suitable for industrial or extended-temperature server environments | Select ISL6562IRZ-T only when ambient operating range is limited to 0–70°C and ENLL functionality is unnecessary |
| RT8803AGQW | 4-phase controller with integrated MOSFET drivers; no rDS(ON)/DCR temperature compensation; VID range 0.3–1.55V | Designed for cost-sensitive client platforms; requires external current sense resistors and lacks VR10.x-specific protections | Choose RT8803AGQW for simplified BOM in non-server applications where ±1% accuracy and thermal compensation are acceptable |
Compared with ISL6561IRZ-T, ISL6562IRZ-T offers identical functionality at lower temperature grade and reduced enable flexibility, while RT8803AGQW integrates drivers but sacrifices precision current sensing and VR10.x compliance-making ISL6561IRZ-T the only choice for thermally demanding, accuracy-critical server VRMs.
Availability
ISL6561IRZ-T is available at Aetrix Electronics and suitable for server CPU core power, workstation GPU supply, high-end desktop VRM, and AI accelerator board applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ISL6561IRZ-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 acquired Intersil in 2017 and maintains full support for its high-performance analog and power management portfolio.
The ISL6561IRZ-T belongs to Renesas' VR10.x-compliant multi-phase PWM controller product line, designed specifically for high-efficiency, high-transient-response core voltage regulation in enterprise computing and AI infrastructure.
FAQ
What is the maximum operating temperature range for the ISL6561IRZ-T?
The ISL6561IRZ-T is rated for an ambient operating temperature range of -40°C to +85°C, as confirmed in the Absolute Maximum Ratings table (Page 8) and Ordering Information (Page 2) of FN9098 Rev 6.00. This extended range supports deployment in thermally demanding server and industrial environments where the ISL6561IRZ-T must maintain ±0.5% system accuracy across full temperature swing.
How does the ISL6561IRZ-T implement temperature compensation for rDS(ON) or DCR current sensing?
The ISL6561IRZ-T uses an internal temperature-sensing element and the TCOMP pin to provide programmable temperature compensation. A resistor from TCOMP to ground sets transconductance (1μA/V/°C typical), scaling compensation current to counteract rDS(ON) or DCR increase with temperature. When correctly applied, this function nullifies thermal drift effects on droop accuracy-enabling stable load-line regulation across -40°C to +85°C without external thermistors.
Can the ISL6561IRZ-T be configured for fewer than four phases, and how is this done?
Yes, the ISL6561IRZ-T supports 2-, 3-, or 4-phase operation via pin strapping. For 2-phase mode, tie PWM3 to VCC; for 3-phase mode, tie PWM4 to VCC; for default 4-phase mode, leave both PWM3 and PWM4 unconnected or grounded. The datasheet confirms this behavior on Page 2 (Pinout) and Page 12 (PWM Operation), where inactive channels disable their associated ISEN inputs and PWM outputs.
What is the purpose of the ENLL pin on the ISL6561IRZ-T, and is it required for operation?
The ENLL pin is a logic-level enable input exclusive to the QFN-packaged ISL6561IRZ-T (not present on SOIC variants). It must be asserted high to activate the controller, even when EN is above 1.24V. Deasserting ENLL clears all fault states and primes soft-start-making it essential for robust fault recovery and power sequencing in server VRMs where the ISL6561IRZ-T coordinates with multiple rail controllers.
Does the ISL6561IRZ-T require external components for overvoltage protection, or is it self-contained?
The ISL6561IRZ-T provides self-contained overvoltage detection with a programmable trip threshold (180–220mV above VID after soft-start), but requires an external crowbar device (e.g., SCR or MOSFET) driven by the OVP pin. The OVP pin pulls low to trigger the crowbar when overvoltage is detected, and can be pulled up to 15V-eliminating need for external comparators or reference circuits, though the crowbar transistor and gate resistor remain necessary external components.
ISL6561IRZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 40-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Applications:
- Controller, Intel VR10X
- Voltage - Input:
- 3V ~ 12V
- Number of Outputs:
- 4
- Voltage - Output:
- 0.84V ~ 1.6V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-QFN (6x6)
ISL6561IRZ-T FAQ
1.How can I place an order for ISL6561IRZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6561IRZ-T 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 ISL6561IRZ-T reliable?
The price and inventory of ISL6561IRZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6561IRZ-T is usually 5 days.
3.What payment methods are accepted for ISL6561IRZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6561IRZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6561IRZ-T?
ISL6561IRZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6561IRZ-T 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 ISL6561IRZ-T?
For technical support, including ISL6561IRZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6561IRZ-T requirements.
6.How does Aetrix verify that ISL6561IRZ-T is sourced from the original manufacturer or authorized distributors?
All ISL6561IRZ-T 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 ISL6561IRZ-T meets industry standards.
7.What is the process for return or replacement of ISL6561IRZ-T?
All ISL6561IRZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL6561IRZ-T, 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 ISL6561IRZ-T part is unused and in its original packaging.
Return procedure for ISL6561IRZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL6561IRZ-T Tags
-
TPS51206DSQR
Texas Instruments
-
TPS51200DRCR
Texas Instruments
-
TPS51200DRCT
Texas Instruments
-
TPS62740DSSR
Texas Instruments
-
TPS51100DGQR
Texas Instruments
-
NCP51200MNTXG
onsemi
-
NCP51400MNTXG
onsemi
-
RT9026GSP
Richtek USA Inc.
-
LP2998MRX/NOPB
Texas Instruments
-
TPS51200QDRCRQ1
Texas Instruments
-
DPA423GN-TL
Power Integrations
-
LM10011SD/NOPB
Texas Instruments
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
