My Inquiry
My Account
Renesas ISL6277HRZ
- Part No.:
- ISL6277HRZ
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
ISL6277HRZ.pdf
- Description:
- IC REG CTRLR MULTIPH 2OUT 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,383
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ISL6277HRZ from Intersil is a dual-output multiphase PWM controller compliant with AMD Fusion™ SVI 2.0, designed for CPU/GPU core power regulation in notebook platforms. It supports 3-/2-/1-phase Core VR and 2-/1-phase Northbridge VR, integrates three gate drivers (two dedicated Core + one programmable), delivers 0.5% system voltage accuracy over temperature, and operates with 4.5V–25V VIN input.
For engineers reviewing the ISL6277HRZ datasheet, ISL6277HRZ pinout, ISL6277HRZ application, or ISL6277HRZ equivalent, this page provides verified technical context, validated pin functions, confirmed SVI 2.0 interface behavior, and real-world phase configuration options for AMD mobile CPU power delivery design.
Technical Context
The ISL6277HRZ implements Intersil's Robust Ripple Regulator (R3™) modulator architecture, enabling automatic switching frequency adjustment during load transients to improve settling time and light-load efficiency. Its dual-VR architecture shares a single serial control bus (SVI 2.0) for coordinated VID-on-the-fly updates and telemetry reporting.
It supports lossless DCR current sensing with NTC-based thermal compensation on both outputs, differential remote voltage sensing (VCORE_SENSE/VSEN and VNB_SENSE/VSEN_NB), and programmable load line droop with independent offset trim per output. Phase balancing is achieved via transconductance amplifier-based current summing (ISUMP/ISUMN and ISUMP_NB/ISUMN_NB).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 4.5V to 25V - supports wide-input battery-fed notebook power rails including 19V adapters and 3-cell Li-ion stacks. |
| Core VR Phases | Configurable 1-, 2-, or 3-phase - selected via ISEN1/ISEN2/ISEN3 pin states; enables scalable power delivery from low- to high-performance CPUs. |
| Northbridge VR Phases | Configurable 1- or 2-phase - selected via ISEN1_NB/ISEN2_NB pin states; decouples GPU/NB power management from core VR. |
| System Voltage Accuracy | ±0.5% over temperature - ensures stable microprocessor operation across full industrial ambient range (-10°C to +100°C). |
| Output Voltage Range | 0.5V to 1.55V in 6.25mV steps - matches AMD SVI 2.0 VID code resolution for precise core/NB voltage setting. |
| Package | 48-pin 6×6 mm QFN with exposed thermal pad - optimized for high-power density notebook PCB layouts and thermal dissipation. |
| SVI 2.0 Interface | Full compliance with AMD Serial VID 2.0 protocol - enables dynamic VID transitions, telemetry feedback (IMON, IMON_NB), and thermal monitoring (VR_HOT_L). |
Pinout & Package
ISL6277HRZ uses a 48-lead 6×6 mm QFN package (Pb-free, RoHS-compliant) with an exposed GND thermal pad on the bottom. Pin numbering follows standard top-view orientation with Pin 1 at top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ISEN1, ISEN2, ISEN3 | Core VR channel enable/sense inputs | Pull to +5V disables corresponding phase; enables flexible 1/2/3-phase Core VR configuration without external logic. |
| ISEN1_NB, ISEN2_NB | Northbridge VR channel enable/sense inputs | Pull to +5V disables NB phase; allows independent 1/2-phase NB VR setup coexisting with Core VR. |
| BOOT1–BOOTX, UGATE1–UGATEX, LGATE1–LGATEX, PHASE1–PHASEX | Integrated gate driver interfaces | Three fully integrated high/low-side drivers (Core PH1/PH2 + programmable PHX) support direct MOSFET drive without external drivers. |
| SVC, SVD, SVT, PWROK | SVI 2.0 serial interface signals | Enable bidirectional VID communication, telemetry reporting, and power-good coordination with AMD CPU per SVI 2.0 spec. |
| VSEN, VSEN_NB, RTN | Differential remote voltage sense inputs | Connect directly to CPU die sense pads to eliminate PCB IR drop error and maintain tight regulation under dynamic load. |
| IMON, IMON_NB | Analog current monitor outputs | Provide current-proportional analog outputs for system-level power telemetry and thermal management. |
| PGOOD, PGOOD_NB | Open-drain power-good indicators | Signal stable regulation per VR domain; require external pull-up to VDDP or 3.3V for system sequencing. |
| VR_HOT_L | Thermal overload indicator | Open-drain active-low signal triggered by NTC/NTC_NB thermistor inputs - alerts CPU of VR thermal fault condition. |
Key Features
| Feature | Design Value |
|---|---|
| R3™ Modulator Architecture | Enables adaptive switching frequency modulation to reduce transient response time and improve light-load efficiency without external compensation. |
| Dual Independent VR Control | Separate error amplifiers (FB/COMP and FB_NB/COMP_NB), current sensing paths, and load-line programming allow independent optimization of Core and Northbridge power domains. |
| Programmable Load Line & Droop | Adjustable offset and droop per output via COMP/COMP_NB resistors - maintains stable voltage under dynamic current changes per AMD specification. |
| DCR Current Sensing with NTC Compensation | Supports lossless inductor DCR sensing on both VRs with single-NCT thermistor per domain - eliminates current-sense resistor losses and improves thermal accuracy. |
| Floating Driver Configuration (PWM_Y / BOOTX) | Single programmable driver (PHX) and PWM output configurable via FCCM_NB resistor for either Core Phase 3 or NB Phase 1 - maximizes flexibility with minimal BOM impact. |
| Adaptive Body Diode Conduction Reduction | Minimizes reverse conduction losses in low-side MOSFETs during light-load CCM-to-DCM transition - increases overall efficiency across load range. |
Applications
| AMD Notebook CPU Core Power | AMD Notebook GPU/Northbridge Power |
|---|---|
|
Use Scenario: High-efficiency, dynamically scaled core voltage regulation for AMD Fusion A-series APUs in thin-and-light notebooks. IC Role / Device Role / Timing Role: Dual-output SVI 2.0-compliant PWM controller managing 3-phase Core VR and 2-phase NB VR with shared serial interface. Use Value: Reduces component count vs. dual-chip solutions while maintaining ±0.5% voltage accuracy and fast transient response under CPU load jumps. |
Use Scenario: Independent, thermally monitored power delivery to integrated GPU/Northbridge in AMD mobile platforms. IC Role / Device Role / Timing Role: Secondary VR controller with dedicated current sensing (ISEN1_NB/ISEN2_NB), remote sensing (VSEN_NB), and thermal shutdown (VR_HOT_L). Use Value: Enables discrete NB power management with DCR sensing and NTC compensation - avoids cross-coupling with core VR dynamics. |
| Scalable Mobile CPU Power Design | SVI 2.0 Telemetry-Enabled System Monitoring |
|
Use Scenario: Single-platform design supporting multiple CPU SKUs (low/mid/high power) via pin-strapped phase configuration. IC Role / Device Role / Timing Role: Programmable phase selection (1/2/3 for Core, 1/2 for NB) using ISENx pins - no firmware or hardware change required. Use Value: Eliminates need for multiple controller variants; simplifies BOM and layout reuse across product tiers. |
Use Scenario: Real-time power telemetry collection for thermal throttling, battery life optimization, and system diagnostics. IC Role / Device Role / Timing Role: Analog current monitors (IMON/IMON_NB) and SVI 2.0 telemetry (SVT) provide synchronized current/voltage data to CPU. Use Value: Enables closed-loop system power management with <1% current measurement error and sub-millisecond telemetry update latency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multiphase VR controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6277A | Direct revision replacement with enhanced stability and updated internal compensation; same pinout and SVI 2.0 interface. | Recommended for new designs; supports identical Core/NB phase configurations and DCR sensing topology. | Select ISL6277A when designing new AMD notebook platforms requiring long-term supply assurance and latest characterization. |
| RT8803A | Single-output 3+1 phase controller with integrated drivers; lacks native SVI 2.0 support and requires external I²C bridge for AMD interface. | Used in cost-sensitive non-AMD platforms; requires additional level-shifting and protocol translation circuitry for SVI compatibility. | Consider RT8803A only for legacy or non-AMD designs where SVI 2.0 is not required and dual-VR integration is handled externally. |
Compared with ISL6277HRZ, ISL6277A offers improved startup reliability and tighter load-line tolerance while maintaining full functional and pinout compatibility; RT8803A provides lower BOM cost but introduces interface complexity and reduces telemetry fidelity in AMD systems.
Availability
ISL6277HRZ is available at Aetrix Electronics and suitable for notebook computer power delivery, AMD Fusion CPU/GPU core regulation, and mobile platform VR design requiring stable component supply and long-lifecycle support.
Supply support for ISL6277HRZ 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
Intersil (now part of Renesas Electronics) is a semiconductor company specializing in precision analog, power management, and interface ICs for computing, industrial, and communications markets.
The ISL6277HRZ belongs to Intersil's multiphase VR controller product line, engineered specifically for AMD mobile processor power delivery with SVI 2.0 compliance, R3™ modulation, and dual-VR integration.
FAQ
What is the operating temperature range for the ISL6277HRZ?
The ISL6277HRZ is rated for an ambient operating temperature range of -10°C to +100°C, making it suitable for industrial-grade notebook applications. Its junction temperature must remain within -10°C to +125°C under normal operation, and thermal design should account for θJA = 29°C/W and θJC = 3.5°C/W in the 48-lead QFN package.
Does the ISL6277HRZ support both DCR and resistor-based current sensing?
Yes, the ISL6277HRZ supports both lossless inductor DCR current sensing and precision resistor-based current sensing on both Core and Northbridge VR outputs. DCR sensing uses internal transconductance amplifiers (ISUMP/ISUMN and ISUMP_NB/ISUMN_NB) with optional NTC compensation via NTC and NTC_NB pins.
How is phase configuration controlled on the ISL6277HRZ?
Phase configuration is controlled via hard-wired pin states: ISEN1/ISEN2/ISEN3 set Core VR to 1-, 2-, or 3-phase mode; ISEN1_NB/ISEN2_NB set Northbridge VR to 1- or 2-phase mode. Pulling any ISENx pin to +5V disables that channel - no register writes or firmware intervention required.
What is the function of the FCCM_NB pin on the ISL6277HRZ?
The FCCM_NB pin configures the floating driver (BOOTX/UGATEX/PHASEX/LGATEX) and PWM_Y output for either Core Phase 3 or Northbridge Phase 1, based on resistor value to GND. It also sets slew rate for VID-on-the-fly transitions and enables diode emulation mode for improved light-load efficiency.
Is the ISL6277HRZ pin-compatible with the ISL6277A?
Yes, the ISL6277HRZ is pin-compatible and functionally compatible with the ISL6277A. The ISL6277A is the recommended replacement part with enhanced internal stability and updated characterization - no PCB or schematic changes are needed for migration.
ISL6277HRZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- Robust Ripple Regulator™ (R3)
- Package/Case:
- 48-VFQFN Exposed Pad
- Packaging:
- Tray
- 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)
ISL6277HRZ FAQ
1.How can I place an order for ISL6277HRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6277HRZ 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 ISL6277HRZ reliable?
The price and inventory of ISL6277HRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6277HRZ is usually 5 days.
3.What payment methods are accepted for ISL6277HRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6277HRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6277HRZ?
ISL6277HRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6277HRZ 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 ISL6277HRZ?
For technical support, including ISL6277HRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6277HRZ requirements.
6.How does Aetrix verify that ISL6277HRZ is sourced from the original manufacturer or authorized distributors?
All ISL6277HRZ 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 ISL6277HRZ meets industry standards.
7.What is the process for return or replacement of ISL6277HRZ?
All ISL6277HRZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL6277HRZ, 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 ISL6277HRZ part is unused and in its original packaging.
Return procedure for ISL6277HRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL6277HRZ 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…
