My Inquiry
My Account
Renesas ISL62771IRTZ
- Part No.:
- ISL62771IRTZ
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
ISL62771IRTZ.pdf
- Description:
- IC REG CTRLR MULTIPH 2OUT 40TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,493
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ISL62771IRTZ from Renesas (formerly Intersil) is a dual-output, multiphase PWM controller for AMD Fusion™ mobile CPUs implementing SVI 2.0 interface, supporting 2-phase Core VR and 1-phase Northbridge VR with integrated gate drivers. It delivers precision voltage regulation (±0.8% system accuracy), DCR/resistor current sensing, differential remote sensing, and R3™ modulator technology for adaptive switching frequency up to 320 kHz - optimized for notebook CPU/GPU core power delivery.
For engineers reviewing the ISL62771IRTZ datasheet, ISL62771IRTZ pinout, ISL62771IRTZ application, or ISL62771IRTZ equivalent, key selection criteria include SVI 2.0 serial bus compliance (100 kHz–25 MHz), -40°C to +100°C industrial temperature rating, 40-lead 5×5 mm TQFN package, dual-VR telemetry (IMON/IMON_NB), and thermal monitoring via NTC inputs.
Technical Context
The ISL62771IRTZ implements two independent voltage regulators on a single die: a programmable 1-/2-phase Core VR and a fixed 1-phase Northbridge VR, sharing a unified SVI 2.0 serial control bus for coordinated VID updates and telemetry reporting. Both VRs use Intersil's R3™ modulator architecture, enabling automatic frequency scaling during transients while maintaining 0.5%–0.8% output accuracy across temperature.
It supports lossless DCR current sensing with single NTC thermistor compensation or precision resistor-based sensing, differential remote voltage sensing (VSEN/RTN), and fully independent load-line programming, OCP/WOC protection, and adaptive body diode conduction time reduction - all within a single 40-pin TQFN footprint.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| SVI 2.0 Interface | Serial VID clock range 100 kHz–25 MHz; bidirectional SVD, clock SVC, telemetry SVT - enables dynamic VID-on-the-fly transitions per AMD spec. |
| Output Voltage Range | 0.5 V to 1.55 V in 6.25 mV steps; supports full AMD SVI 2.0 VID code mapping for CPU core and Northbridge rails. |
| System Accuracy | ±0.8% over -40°C to +100°C ambient; includes load line, temperature, and line regulation effects - critical for stable APU operation. |
| Switching Frequency | Programmable 280–320 kHz nominal; R3™ modulator dynamically increases frequency during load transients for faster settling. |
| Current Sensing | DCR-based (lossless) or precision resistor methods; dual NTC inputs (NTC, NTC_NB) enable real-time thermal compensation of sense networks. |
| Protection Features | OCP/WOC, OVP (±325 mV threshold), UVP, PGOOD, thermal monitor (NTC-based shutdown at 530–630 mV), and phase current imbalance detection (9 mV threshold). |
| Package | 40-lead 5×5 mm TQFN (RoHS-compliant, Pb-free); exposed thermal pad enables θJC = 3°C/W for high-power density notebook designs. |
Pinout & Package
ISL62771IRTZ uses a 40-lead 5×5 mm TQFN package with exposed thermal pad (bottom). Pin functions are validated per FN8321 Rev 4.00 datasheet, including dual VR gate driver outputs, SVI 2.0 interface pins, differential sense inputs, and dedicated thermal monitor terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ENABLE (Pin 8) | Global VR activation control | High-level logic enables both Core and Northbridge VRs; low disables all outputs - used for system power sequencing. |
| VSEN / VSEN_NB (Pins 16, 38) | Differential output voltage sense inputs | Connect directly to CPU die +sense pads; paired with RTN (Pin 17) to reject PCB IR drop and ensure tight regulation at point-of-load. |
| ISEN1 / ISEN2 (Pins 12, 13) | Core VR phase enable/sense inputs | Configure 1-phase (ISEN2 = +5V) or 2-phase (ISEN1/ISEN2 tied appropriately); also support resistor-based current sensing network. |
| UGATE1/LGATE1/PHASE1 (Pins 22, 24, 23) | Core VR Phase 1 gate drive outputs | Drive external high-side/low-side MOSFETs; PHASE1 is floating node reference for boot capacitor charging and current sensing. |
| NTC / NTC_NB (Pins 11, 1) | Thermal monitor inputs | Accept NTC thermistors for Core/Northbridge VR temperature compensation and thermal shutdown (530–630 mV trip threshold). |
| SVC/SVD/SVT (Pins 3, 5, 7) | SVI 2.0 serial interface | Enable bidirectional communication with AMD CPU: VID setting, telemetry readback, and VID-on-the-fly transitions without reset. |
Key Features
| Feature | Design Value |
|---|---|
| R3™ Multiphase Modulator | Adaptive switching frequency improves transient response by up to 2× vs fixed-frequency PWM; maintains ±0.8% accuracy under load steps. |
| Dual Independent VR Architecture | Single-chip integration of Core (1-/2-phase) and Northbridge (1-phase) VRs reduces BOM count and board area vs dual-controller solutions. |
| Differential Remote Sensing | VSEN/RTN pair eliminates PCB trace resistance error - ensures regulation accuracy at CPU die rather than at VR output. |
| Telemetry Support | IMON and IMON_NB analog current monitor outputs enable real-time power rail diagnostics and dynamic thermal management in firmware. |
| Thermal Monitoring with Hysteresis | NTC-based thermal warning (600–680 mV) and shutdown (530–630 mV) with 20 mV hysteresis prevents oscillation during thermal events. |
Applications
| AMD Notebook CPU Core Power | AMD Notebook GPU/Northbridge Power |
|---|---|
|
Use Scenario: Power delivery for AMD Fusion A-series APUs in ultrathin notebooks requiring dynamic voltage scaling and thermal-aware load-line control. IC Role / Device Role / Timing Role: Dual-output SVI 2.0 controller managing Core and Northbridge VRs with synchronized telemetry and shared serial bus. Use Value: Enables precise 6.25 mV VID steps and ±0.8% system accuracy across -40°C to +100°C - critical for sustained turbo boost performance. |
Use Scenario: Dedicated 1-phase VR for AMD APU Northbridge domain in space-constrained laptop motherboards. IC Role / Device Role / Timing Role: Integrated gate driver and error amplifier for Northbridge rail; shares SVI 2.0 bus and thermal monitoring with Core VR. Use Value: Eliminates need for second controller IC - reduces component count, layout complexity, and total solution cost by ~30%. |
| Notebook Dynamic Load-Line Control | Thermally Adaptive CPU Power Management |
|
Use Scenario: Implementing programmable load-line droop to prevent voltage overshoot during sudden CPU load release. IC Role / Device Role / Timing Role: Uses IDROOP current source and COMP/COMP_NB resistive dividers to set slope; updated via SVI 2.0 commands. Use Value: Achieves <1% voltage deviation during 50 A/µs load transients - meets AMD platform specification for stability. |
Use Scenario: Real-time thermal compensation of DCR current sense networks using on-die NTC inputs for Core and NB rails. IC Role / Device Role / Timing Role: NTC/NTC_NB pins feed thermistor voltage into internal comparators; triggers VR_HOT_L signal and adjusts load line. Use Value: Maintains current-sense accuracy within ±2% over full temperature range - avoids false OCP trips during thermal cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multiphase CPU VR controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL62771HRTZ | Same silicon, wider -10°C to +100°C ambient rating; identical pinout, electrical specs, and SVI 2.0 functionality. | Targeted for commercial-grade notebooks; lacks extended low-temp capability required for industrial or automotive-adjacent deployments. | Select ISL62771HRTZ only if operating ambient stays above -10°C; otherwise ISL62771IRTZ ensures guaranteed startup and regulation down to -40°C. |
| RTQ2136B-QA | Single-output, 6-phase controller with I²C interface; no SVI 2.0 support, no Northbridge VR channel, no NTC thermal monitoring. | Designed for generic x86 SoC core power; requires external interface translation and separate NB VR - increases BOM and layout effort. | Use RTQ2136B-QA only in non-AMD platforms; ISL62771IRTZ remains mandatory for native SVI 2.0 compliance and dual-VR integration. |
Compared with ISL62771HRTZ, the ISL62771IRTZ extends guaranteed operation to -40°C ambient while retaining identical performance and pin compatibility; versus RTQ2136B-QA, it provides native AMD SVI 2.0 support, integrated Northbridge VR, and dual NTC thermal monitoring - eliminating interface translation and secondary controllers.
Availability
ISL62771IRTZ is available at Aetrix Electronics and suitable for notebook CPU core power, AMD APU Northbridge regulation, and thermally adaptive VR designs requiring stable component supply across industrial temperature ranges.
Supply support for ISL62771IRTZ 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 its high-performance analog and power management portfolio. Renesas is a global semiconductor leader focused on embedded solutions for automotive, industrial, and computing markets.
The ISL62771IRTZ belongs to Renesas' AMD-specific VR controller product line, engineered to meet strict SVI 2.0 timing, telemetry, and thermal requirements for mobile APU platforms - emphasizing integration, accuracy, and reliability in thin-profile notebooks.
FAQ
What is the operating temperature range for the ISL62771IRTZ?
The ISL62771IRTZ is rated for -40°C to +100°C ambient temperature operation, with junction temperature support up to +125°C. This extended range ensures reliable startup and regulation in industrial and wide-temperature notebook environments where the ISL62771IRTZ serves as the primary CPU/GPU core power controller.
Does the ISL62771IRTZ support both DCR and resistor-based current sensing?
Yes, the ISL62771IRTZ supports both lossless inductor DCR current sensing and precision resistor current sensing on both Core and Northbridge VR outputs. It includes dedicated ISEN1/ISEN2 pins for Core phase configuration and dual NTC inputs (NTC, NTC_NB) to compensate DCR networks for temperature drift - a key feature of the ISL62771IRTZ design.
How does the R3™ modulator in the ISL62771IRTZ improve transient response?
The R3™ modulator in the ISL62771IRTZ automatically increases switching frequency during load transients by accelerating master clock generation when COMP voltage rises. This yields faster PWM pulse onset and reduced settling time - demonstrated in datasheet Figure 10 - giving the ISL62771IRTZ superior dynamic response compared to fixed-frequency controllers while maintaining ±0.8% accuracy.
What is the purpose of the SVT pin on the ISL62771IRTZ?
The SVT (Serial VID Telemetry) pin on the ISL62771IRTZ is an input to the AMD CPU that reports telemetry data such as output voltage, current, and thermal status. It also signals completion of VID-on-the-fly transitions. Unlike SVD/SVC, SVT enables closed-loop platform monitoring - a defined function of the ISL62771IRTZ per AMD SVI 2.0 specification.
Can the ISL62771IRTZ be configured for single-phase Core VR operation?
Yes, the ISL62771IRTZ supports 1-phase Core VR operation by pulling ISEN2 (Pin 12) to +5V, which disables Channel 2. When configured this way, ISEN1 (Pin 13) must be tied to GND via a 10 kΩ resistor to prevent unintended shutdown. This flexibility allows the ISL62771IRTZ to serve both mid-power and low-power AMD notebook platforms.
ISL62771IRTZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- Robust Ripple Regulator™ (R3)
- Package/Case:
- 40-VFQFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Active
- 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:
- 40-TQFN (5x5)
ISL62771IRTZ FAQ
1.How can I place an order for ISL62771IRTZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL62771IRTZ 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 ISL62771IRTZ reliable?
The price and inventory of ISL62771IRTZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL62771IRTZ is usually 5 days.
3.What payment methods are accepted for ISL62771IRTZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL62771IRTZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL62771IRTZ?
ISL62771IRTZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL62771IRTZ 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 ISL62771IRTZ?
For technical support, including ISL62771IRTZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL62771IRTZ requirements.
6.How does Aetrix verify that ISL62771IRTZ is sourced from the original manufacturer or authorized distributors?
All ISL62771IRTZ 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 ISL62771IRTZ meets industry standards.
7.What is the process for return or replacement of ISL62771IRTZ?
All ISL62771IRTZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL62771IRTZ, 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 ISL62771IRTZ part is unused and in its original packaging.
Return procedure for ISL62771IRTZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL62771IRTZ 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…
