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Renesas ISL62773IRZ
- Part No.:
- ISL62773IRZ
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
ISL62773IRZ.pdf
- Description:
- IC REG CTRLR MULTIPH 2OUT 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:996
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Product details
Overview
ISL62773IRZ from Renesas (formerly Intersil) is a dual-output multiphase PWM controller for AMD Fusion™ desktop CPU/GPU core power delivery, compliant with SVI 2.0 serial interface. It integrates three gate drivers, supports 3-/2-/1-phase Core VR and 2-/1-phase Northbridge VR, delivers 0.5% system voltage accuracy over temperature, operates from 4.5V–25V VIN, and uses R3™ ripple-based modulation for fast transient response.
For engineers reviewing the ISL62773IRZ datasheet, ISL62773IRZ pinout, ISL62773IRZ application, or ISL62773IRZ equivalent, this page provides verified technical context, validated pin functions, confirmed dual-VR architecture, real-world current sensing options (DCR/resistor), and precise thermal monitoring behavior per AMD SVI 2.0 implementation requirements.
Technical Context
The ISL62773IRZ implements two independent voltage regulators sharing one SVI 2.0 serial bus: Core VR (configurable 1–3 phases) and Northbridge VR (1–2 phases), each with differential remote sensing, programmable load line, and independent OCP/WOC, PGOOD, and thermal monitoring. Its R3™ modulator dynamically adjusts switching frequency (280–450 kHz) to optimize light-load efficiency and transient settling time.
It supports lossless DCR current sensing with NTC-based temperature compensation on both outputs, or precision resistor sensing; features adaptive body diode conduction reduction, floating PWM_Y/BOOTX/UGATEX/PHASEX/LGATEX for flexible phase assignment, and VID-on-the-fly slew rate control (8–24 mV/µs). The controller uses separate COMP and COMP_NB error amplifier outputs to set offset and configure switching frequency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 4.5V to 25V - supports wide-input desktop power rails including 5V, 12V, and 19V battery/supply inputs. |
| Output Voltage Range | 0.5V to 1.55V in 6.25mV steps - matches AMD SVI 2.0 VID code resolution for precise CPU core voltage programming. |
| System Accuracy | ±0.8% over –40°C to +85°C - ensures stable regulation across industrial-grade ambient range without calibration. |
| Switching Frequency | 280–450 kHz - programmable CCM operation enables optimized trade-off between efficiency, size, and EMI. |
| Phase Support | Core: 1/2/3-phase; NB: 1/2-phase - configurable via ISENx pin strapping, enabling scalable design for low/mid/high-power CPUs. |
| Current Sensing | DCR or resistor-based, with NTC compensation - eliminates sense resistor losses or enables high-accuracy discrete sensing. |
| Thermal Monitoring | NTC inputs for Core & NB VRs with programmable warning/shutdown thresholds - provides independent die-temperature feedback per rail. |
Pinout & Package
ISL62773IRZ is housed in a Pb-free, RoHS-compliant 48-lead 6×6 mm QFN package with exposed thermal pad (Package Drawing L48.6x6B). Pin assignments are validated per FN8263 Rev 1.00 datasheet, Page 8–10.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ISEN1, ISEN2, ISEN3 | Core VR channel enable/disable inputs | Pulling to +5V disables corresponding phase; enables hardware-configurable 1/2/3-phase Core operation. |
| ISEN1_NB, ISEN2_NB | Northbridge VR channel enable/disable inputs | Strapping determines 1- or 2-phase NB VR; ISEN2_NB = +5V forces single-phase NB mode. |
| UGATE1/2/X, LGATE1/2/X | High-side/low-side MOSFET gate drivers | Three integrated drivers (UGATE1/LGATE1, UGATE2/LGATE2, UGATEX/LGATEX) support flexible phase allocation. |
| PWM_Y, PWM2_NB | Floating and dedicated PWM outputs | PWM_Y assigned to Core Phase 3 or NB Phase 1 via FCCM_NB resistor; PWM2_NB fixed for NB Phase 2. |
| SVC, SVD, SVT | SVI 2.0 serial interface signals | SVC = clock (100kHz–25MHz), SVD = bidirectional data, SVT = telemetry/VID-on-the-fly completion signal. |
| IMON, IMON_NB | Analog current monitor outputs | Current-source outputs proportional to Core/NB output current - used for system-level telemetry and protection. |
| FB, FB_NB, VSEN, VSEN_NB | Differential voltage sense inputs | VSEN/FB pair for Core; VSEN_NB/FB_NB for NB - enables Kelvin sensing at CPU die for ±0.8% accuracy. |
| PGOOD, PGOOD_NB | Open-drain power-good indicators | Asserted after soft-start, OVP/UVP pass, and stable regulation - required by AMD for platform power sequencing. |
Key Features
| Feature | Design Value |
|---|---|
| R3™ Robust Ripple Regulator modulation | Auto-adjusts switching frequency during load transients to reduce settling time and improve light-load efficiency. |
| Dual independent VR architecture | Single IC manages Core and Northbridge power rails with shared SVI 2.0 bus - reduces BOM count and PCB area vs. dual-chip solutions. |
| Programmable VID-on-the-fly slew rate | Configurable 8–24 mV/µs transition rate prevents excessive dI/dt during dynamic voltage scaling. |
| Adaptive body diode conduction time reduction | Minimizes shoot-through and conduction losses in synchronous buck stages without external timing components. |
| DCR current sensing with NTC compensation | Enables lossless current measurement using inductor DCR, with automatic temperature correction for stable load-line accuracy. |
| Floating driver configuration (PWM_Y/BOOTX/UGATEX/PHASEX/LGATEX) | Supports either Core Phase 3 or Northbridge Phase 1 via FCCM_NB resistor selection - maximizes layout flexibility. |
Applications
| AMD Desktop CPU Core Power | AMD Desktop GPU/Northbridge Power |
|---|---|
|
Use Scenario: High-performance desktop motherboard delivering regulated core voltage to AMD Fusion APUs with dynamic frequency scaling. IC Role / Device Role / Timing Role: Primary multiphase PWM controller managing up to 3-phase Core VR with SVI 2.0 closed-loop communication to CPU. Use Value: Achieves ±0.8% voltage accuracy across –40°C to +85°C and supports 280–450 kHz switching for optimal efficiency at full and light loads. |
Use Scenario: Dual-rail power delivery for AMD Fusion platforms requiring independent regulation of CPU core and integrated graphics/Northbridge domains. IC Role / Device Role / Timing Role: Secondary VR controller sharing SVI 2.0 bus, configured for 1- or 2-phase Northbridge output with dedicated PGOOD_NB and thermal monitoring. Use Value: Eliminates need for second controller IC, reducing cost and board space while maintaining independent load-line and protection per rail. |
| Desktop Motherboard VRM Design | AMD SVI 2.0 Compliance Reference Platform |
|
Use Scenario: OEM motherboard design targeting AMD AM3+/FM2+ socket platforms with strict VRM phase count and telemetry requirements. IC Role / Device Role / Timing Role: Integrated gate driver + controller solution supporting 3+1, 2+1, or 1+1 phase configurations via pin-strapped ISENx inputs. Use Value: Enables single-PCB design reuse across low/mid/high-power SKUs through simple resistor changes - no firmware or layout revision needed. |
Use Scenario: Reference design validation for AMD SVI 2.0 compliance, including pre-PWROK metal VID, telemetry reporting, and VID-on-the-fly transitions. IC Role / Device Role / Timing Role: Fully SVI 2.0–compliant controller with SVC/SVD/SVT interface, PWROK synchronization, and SVI bus protocol handling per FN8263 spec. Use Value: Delivers certified timing alignment for SVI handshake, telemetry packet structure, and fault recovery sequences required for AMD platform certification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multiphase VR controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL62771HRZ | Same R3™ architecture and SVI 2.0 compliance, but rated for –10°C to +100°C and lacks Northbridge VR support - single-output only. | Applicable only for Core VR-only designs; cannot replace ISL62773IRZ in dual-VR systems. | Select when only CPU core regulation is required and extended temperature range is acceptable. |
| RTQ2136BGE | Single-output, 3-phase controller with PMBus interface (not SVI 2.0); supports 0.3–1.8V output, ±0.5% accuracy, but no integrated Northbridge VR or SVI telemetry. | Requires external SVI-to-PMBus bridge for AMD platforms; not drop-in compatible for SVI 2.0 host communication. | Consider only for non-AMD platforms or custom firmware implementations where SVI 2.0 is not mandated. |
Compared with ISL62773IRZ, ISL62771HRZ offers identical Core VR capability but omits Northbridge VR functionality and thermal grade, while RTQ2136BGE provides modern PMBus control at the cost of SVI 2.0 compatibility - making ISL62773IRZ uniquely suited for AMD Fusion desktop reference and production designs.
Availability
ISL62773IRZ is available at Aetrix Electronics and suitable for AMD desktop motherboard development, high-reliability VRM manufacturing, and industrial embedded computing platforms requiring stable component supply with guaranteed long-term availability.
Supply support for ISL62773IRZ 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, including VR controllers for computing applications.
The ISL62773IRZ belongs to Intersil's AMD-specific VRM controller product line, engineered to meet AMD Fusion™ platform power delivery specifications - particularly SVI 2.0 interface timing, dual-rail telemetry, and R3™ transient performance requirements.
FAQ
What is the operating temperature range for the ISL62773IRZ?
The ISL62773IRZ is specified for an industrial-grade ambient temperature range of –40°C to +85°C, with junction temperature limited to –10°C to +125°C under recommended operating conditions. This rating is explicitly defined in the Ordering Information table (Page 10) and Electrical Specifications (Page 11) of FN8263 Rev 1.00, distinguishing it from the HRZ variant (–10°C to +100°C).
Does the ISL62773IRZ support both DCR and resistor-based current sensing?
Yes, the ISL62773IRZ supports both lossless inductor DCR current sensing - with NTC thermistor inputs (NTC, NTC_NB) for temperature compensation - and precision resistor current sensing on both Core and Northbridge VR outputs. This dual-sensing capability is documented in the Features section (Page 1) and Key Component Selection chapter (Pages 28–30) of FN8263 Rev 1.00.
How does the ISL62773IRZ implement AMD SVI 2.0 compliance?
The ISL62773IRZ implements full AMD SVI 2.0 compliance via dedicated pins (SVC, SVD, SVT), supporting serial VID clock frequencies from 100 kHz to 25 MHz, pre-PWROK metal VID, VID-on-the-fly transitions, telemetry reporting, and SVI bus protocol timing per AMD Controller Guidelines. These functions are detailed in Sections 21–25 of FN8263 Rev 1.00.
Can the ISL62773IRZ be configured for different phase counts on Core and Northbridge outputs?
Yes, the ISL62773IRZ allows independent phase configuration: Core VR supports 1-, 2-, or 3-phase operation via ISEN1/ISEN2/ISEN3 pin strapping, while Northbridge VR supports 1- or 2-phase via ISEN1_NB/ISEN2_NB. This flexibility is confirmed in the Datasheet Overview (Page 1) and Pin Descriptions (Pages 8–10) of FN8263 Rev 1.00.
What protection features are integrated into the ISL62773IRZ?
The ISL62773IRZ integrates OCP/WOC (way-overcurrent), OVP, UVP, thermal monitoring (via NTC/NTC_NB), current imbalance detection, and PGOOD assertion with fault recovery. Each protection mechanism has defined thresholds - e.g., OVP/UVP trip at ±325 mV from setpoint - and is validated in the Protection Features section (Page 26) and Electrical Specifications (Page 12) of FN8263 Rev 1.00.
ISL62773IRZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- Robust Ripple Regulator™ (R3)
- Package/Case:
- 48-VFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Applications:
- Controller, AMD Fusion™ SVI 2.0 CPU GPU
- Voltage - Input:
- 4.5V ~ 25V
- Number of Outputs:
- 2
- Voltage - Output:
- 0.006V ~ 1.55V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-QFN (6x6)
ISL62773IRZ FAQ
1.How can I place an order for ISL62773IRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL62773IRZ 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 ISL62773IRZ reliable?
The price and inventory of ISL62773IRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL62773IRZ is usually 5 days.
3.What payment methods are accepted for ISL62773IRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL62773IRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL62773IRZ?
ISL62773IRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL62773IRZ 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 ISL62773IRZ?
For technical support, including ISL62773IRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL62773IRZ requirements.
6.How does Aetrix verify that ISL62773IRZ is sourced from the original manufacturer or authorized distributors?
All ISL62773IRZ 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 ISL62773IRZ meets industry standards.
7.What is the process for return or replacement of ISL62773IRZ?
All ISL62773IRZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL62773IRZ, 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 ISL62773IRZ part is unused and in its original packaging.
Return procedure for ISL62773IRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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