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Renesas ISL62773AHRZ
- Part No.:
- ISL62773AHRZ
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
ISL62773AHRZ.pdf
- Description:
- IC REG CTRLR MULTIPH 2OUT 48QFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
ISL62773AHRZ from Renesas Electronics (formerly Intersil) is a dual-output multiphase PWM controller IC designed for AMD Fusion™ mobile CPU/GPU core power delivery using SVI 2.0 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 in notebook applications.
For engineers reviewing the ISL62773AHRZ datasheet, ISL62773AHRZ pinout, ISL62773AHRZ application, or ISL62773AHRZ equivalent, key selection considerations include SVI 2.0 serial bus compliance (100kHz–25MHz), dual-VR shared control architecture, DCR/resistor current sensing support, differential remote sensing, and programmable slew rate (8–24 mV/µs) for dynamic VID transitions.
Technical Context
The ISL62773AHRZ implements two independent voltage regulator (VR) channels-Core VR and Northbridge VR-each with dedicated feedback loops, current sensing inputs (ISENx), and error amplifiers (FB/COMP and FB_NB/COMP_NB). Its Robust Ripple Regulator R3™ modulator dynamically adjusts switching frequency during load transients to improve settling time and light-load efficiency.
It features adaptive body diode conduction time reduction, programmable phase count per VR, floating PWM_Y and BOOTX/UGATEX/PHASEX/LGATEX driver configurable for either Core Phase 3 or Northbridge Phase 1, and thermal monitoring via dual NTC inputs (NTC and NTC_NB) with VR_HOT_L open-drain output.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 4.5V to 25V - supports wide-input battery-fed notebook power architectures with feed-forward stability. |
| Output Voltage Range | 0.5V to 1.55V in 6.25mV steps - matches AMD SVI 2.0 VID code resolution for precise CPU/GPU core voltage setting. |
| System Accuracy | ±0.5% over temperature - ensures stable regulation across full operating range (-10°C to +100°C for HRZ grade). |
| Switching Frequency | 280–450 kHz - programmable CCM operation enabling optimized trade-off between efficiency, size, and transient response. |
| SVI 2.0 Interface | 100kHz–25MHz serial clock - enables high-speed bidirectional communication with AMD CPUs for real-time telemetry and VID-on-the-fly updates. |
| Current Sensing | DCR or precision resistor - supports lossless inductor sensing with single NTC compensation or high-accuracy shunt-based measurement. |
| Slew Rate | 8–24 mV/µs programmable - controls rate of VID transitions to prevent overshoot/undershoot during dynamic CPU state changes. |
Pinout & Package
ISL62773AHRZ is housed in a Pb-free, RoHS-compliant 48-lead 6×6 mm QFN package with exposed thermal pad (Package Drawing L48.6x6B). The pinout supports dual-VR operation with dedicated Core/Northbridge sensing, gate drive, and telemetry paths.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ISEN1, ISEN2, ISEN3 | Core VR channel current sense inputs | Enable per-phase current monitoring; pulling ISEN2/ISEN3 to +5V disables respective phases for 1-/2-phase Core configuration. |
| ISEN1_NB, ISEN2_NB | Northbridge VR channel current sense inputs | Support 1-/2-phase NB operation; ISEN2_NB pull-up disables Channel 2, forcing single-phase NB mode. |
| UGATE1, LGATE1, PHASE1, BOOT1 | Core VR Phase 1 gate drive interface | Drive high-side/low-side MOSFETs; PHASE1 is switching node, BOOT1 supplies high-side driver bootstrap voltage. |
| UGATE2, LGATE2, PHASE2, BOOT2 | Core VR Phase 2 gate drive interface | Independent second-phase drive path with identical topology to Phase 1 for balanced multi-phase operation. |
| UGATEX, LGATEX, PHASEX, BOOTX, PWM_Y | Floating driver/PWM for Core Phase 3 or NB Phase 1 | Configurable via FCCM_NB resistor; eliminates need for external driver in mid- to high-power configurations. |
| SVC, SVD, SVT, PWROK | SVI 2.0 serial interface and power-good handshake | Enables CPU-controlled voltage programming, telemetry reporting (IMON/IMON_NB), and synchronized power sequencing. |
| FB, FB_NB, VSEN, VSEN_NB, RTN | Differential remote voltage sensing inputs | Connect directly to CPU die sense points to compensate for PCB IR drop and ensure accurate core/NB voltage regulation. |
| NTC, NTC_NB | Thermal monitor inputs | Interface with thermistors to detect VR overtemperature; trigger VR_HOT_L active-low thermal fault signal to CPU. |
Key Features
| Feature | Design Value |
|---|---|
| R3™ Robust Ripple Regulation | Auto-adjusts switching frequency during load transients to reduce settling time by >30% vs fixed-frequency PWM while improving light-load efficiency. |
| Dual-VR Shared Serial Bus | Single SVI 2.0 interface controls both Core and Northbridge VRs-reducing component count, PCB area, and BOM cost versus dual-chip solutions. |
| Programmable Phase Count | Core VR supports 3-, 2-, or 1-phase; Northbridge VR supports 2- or 1-phase-enabling scalable power delivery across low/mid/high-power mobile CPUs. |
| Adaptive Body Diode Conduction Reduction | Minimizes reverse recovery losses in synchronous rectifiers by dynamically shortening low-side FET conduction during dead time. |
| VID-on-the-Fly Slew Rate Control | Configurable 8–24 mV/µs transition rate prevents voltage glitches during CPU P-state transitions, ensuring stable operation under dynamic loads. |
| Dual Thermal Monitoring | Independent NTC inputs for Core and Northbridge VRs feed separate thermal warning/shutdown thresholds, enabling precise localized thermal management. |
Applications
| AMD Mobile CPU Core Power | AMD Mobile GPU Core Power |
|---|---|
|
Use Scenario: Power delivery for AMD Fusion A-series and E-series APUs in ultrabooks and thin-and-light notebooks. IC Role / Device Role / Timing Role: Dual-output multiphase PWM controller managing Core VR (up to 3-phase) and Northbridge VR (up to 2-phase) with SVI 2.0 CPU coordination. Use Value: Enables precise 0.5V–1.55V regulation at ±0.5% accuracy, fast transient response via R3™ modulation, and reduced board area through integrated drivers and shared serial bus. |
Use Scenario: Dedicated voltage regulation for integrated Radeon graphics cores in AMD mobile APUs. IC Role / Device Role / Timing Role: Northbridge VR channel provides independent, remotely sensed 0.5V–1.55V supply with programmable 1-/2-phase operation and thermal monitoring. Use Value: Maintains GPU voltage stability during graphics-intensive workloads using differential sensing and adaptive body diode control to minimize power loss. |
| Notebook System Power Sequencing | Thermally Adaptive Mobile Power |
|
Use Scenario: Coordinated startup and fault signaling between CPU, GPU, and VRs in Windows/Linux-based notebooks. IC Role / Device Role / Timing Role: Uses PWROK input and PGOOD/PGOOD_NB outputs to enforce AMD-defined power-on reset timing and safe enable/disable sequencing. Use Value: Ensures reliable boot by enforcing pre-PWROK metal VID states and post-PWROK SVI 2.0 activation, preventing premature CPU wake-up or latch-up. |
Use Scenario: Real-time thermal throttling of CPU/GPU voltages based on die temperature in fanless or thermally constrained designs. IC Role / Device Role / Timing Role: Monitors NTC and NTC_NB inputs to generate VR_HOT_L signal and adjust load line droop dynamically via IDROOP registers. Use Value: Prevents thermal runaway by triggering CPU-initiated throttling before junction temperatures exceed 125°C, extending device lifetime and reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multiphase VR controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL62771AHRZ | Single-output version supporting only Core VR (3-/2-/1-phase); no Northbridge VR channel or NB-specific pins (e.g., PWM2_NB, ISEN1_NB). | Limited to CPU-only power delivery; cannot replace ISL62773AHRZ in dual-VR APU platforms requiring independent GPU voltage control. | Select when only Core VR functionality is needed and board space/cost optimization is critical for non-APU designs. |
| RTQ2136BGE | Single-output, 6-phase controller with PMBus interface; lacks SVI 2.0 compliance, NTC thermal monitoring, and floating driver configuration logic. | Targets Intel CPU platforms or generic server/desktop VRs; incompatible with AMD SVI 2.0 protocol and telemetry requirements. | Consider only for non-AMD systems where PMBus configurability and higher phase count outweigh SVI 2.0 dependency. |
Compared with ISL62771AHRZ and RTQ2136BGE, the ISL62773AHRZ uniquely delivers dual-VR integration with native AMD SVI 2.0 support, enabling coordinated CPU/GPU voltage scaling, telemetry, and thermal management in a single 48-pin QFN-reducing system complexity and validation effort for AMD mobile platforms.
Availability
ISL62773AHRZ is available at Aetrix Electronics and suitable for notebook computers, AMD Fusion APU power delivery, and thermally constrained mobile embedded systems requiring stable component supply and long-term lifecycle support.
Supply support for ISL62773AHRZ 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 continues to support its high-performance analog and power management portfolio for computing, industrial, and automotive markets.
The ISL62773AHRZ belongs to Renesas' AMD-optimized multiphase VR controller product line, engineered specifically for energy-efficient, thermally aware core power delivery in mobile processors with serial VID interfaces.
FAQ
What is the operating temperature range for the ISL62773AHRZ?
The ISL62773AHRZ is rated for ambient operation from -10°C to +100°C, with junction temperature limits up to +125°C. This HRZ-grade specification targets commercial notebook applications where thermal design prioritizes compact form factor and moderate power dissipation. The device includes dual NTC inputs (NTC and NTC_NB) to monitor Core and Northbridge VR temperatures independently and assert VR_HOT_L if thresholds are exceeded.
Does the ISL62773AHRZ support both DCR and resistor-based current sensing?
Yes, the ISL62773AHRZ supports both lossless inductor DCR current sensing and precision resistor (shunt) current sensing on both Core and Northbridge VR outputs. Each channel has dedicated ISENx inputs and transconductance amplifier inputs (ISUMP/ISUMN and ISUMP_NB/ISUMN_NB). DCR sensing uses a single NTC thermistor for temperature compensation, while resistor sensing provides higher absolute accuracy without thermal drift dependencies.
How does the ISL62773AHRZ implement SVI 2.0 communication?
The ISL62773AHRZ implements AMD SVI 2.0 via three dedicated pins: SVC (serial clock), SVD (bidirectional data), and SVT (telemetry output). It supports clock frequencies from 100kHz to 25MHz, enabling real-time VID-on-the-fly updates, output current/voltage telemetry (IMON/IMON_NB), and thermal status reporting. The PWROK pin synchronizes interface activation with system power sequencing per AMD Controller Guidelines.
Can the ISL62773AHRZ be configured for single-phase operation on both outputs?
Yes, the ISL62773AHRZ supports 1-phase operation for both Core VR and Northbridge VR. Core VR is set to single-phase by pulling ISEN2 and ISEN3 to +5V; Northbridge VR is set to single-phase by pulling ISEN2_NB to +5V. In this 1+1 configuration, the floating driver (UGATEX/PHASEX/LGATEX) and PWM_Y are assigned to Northbridge Phase 1, freeing all three internal drivers for Core use if needed.
What protection features does the ISL62773AHRZ provide?
The ISL62773AHRZ includes overvoltage (OVP), undervoltage (UVP), overcurrent (OCP/WOC), thermal monitoring (via NTC/NTC_NB), and power-good (PGOOD/PGOOD_NB) protection. OCP uses both IMONx current-based and VIMONx voltage-based detection with programmable trip thresholds. Current imbalance protection triggers if one phase's ISEN signal deviates >9mV from others for >1.2ms, ensuring balanced multi-phase operation.
ISL62773AHRZ 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:
- -10°C ~ 100°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-QFN (6x6)
ISL62773AHRZ FAQ
1.How can I place an order for ISL62773AHRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL62773AHRZ 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 ISL62773AHRZ reliable?
The price and inventory of ISL62773AHRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL62773AHRZ is usually 5 days.
3.What payment methods are accepted for ISL62773AHRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL62773AHRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL62773AHRZ?
ISL62773AHRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL62773AHRZ 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 ISL62773AHRZ?
For technical support, including ISL62773AHRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL62773AHRZ requirements.
6.How does Aetrix verify that ISL62773AHRZ is sourced from the original manufacturer or authorized distributors?
All ISL62773AHRZ 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 ISL62773AHRZ meets industry standards.
7.What is the process for return or replacement of ISL62773AHRZ?
All ISL62773AHRZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL62773AHRZ, 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 ISL62773AHRZ part is unused and in its original packaging.
Return procedure for ISL62773AHRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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