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Renesas ISL78211ARZ-T
- Part No.:
- ISL78211ARZ-T
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
ISL78211ARZ-T.pdf
- Description:
- IC REG CONV INTEL 1OUT 40QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,138
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Product details
Overview
ISL78211ARZ-T from Intersil is an automotive-grade single-phase buck regulator implementing Intel IMVP-6™ protocol with integrated 2A gate drivers, 7-bit VID DAC (0.300V–1.500V), ±0.5% system voltage accuracy over –10°C to +100°C, and R3™ Robust Ripple Regulator modulator for fast transient response in CPU core power delivery.
For engineers reviewing the ISL78211ARZ-T datasheet, ISL78211ARZ-T pinout, ISL78211ARZ-T application, or ISL78211ARZ-T equivalent, this page delivers verified technical context, validated pin functions, confirmed IMVP-6™ compliance, differential remote sensing capability, and real-world efficiency modes (CCM/DEM/EDEM) for automotive microprocessor power design.
Technical Context
The ISL78211ARZ-T implements Intel IMVP-6™ dynamic voltage positioning using a patented R3™ modulator that synthesizes inductor ripple current for hysteretic PWM control-enabling variable switching frequency during load transients and faster response than fixed-frequency controllers. It supports three operation modes (CCM, DEM, EDEM) selected via DPRSLPVR, DPRSTP#, and FDE pins.
It integrates a unity-gain differential amplifier for remote die voltage sensing (VSEN/RTN), dual current sensing (lossless DCR with NTC thermal compensation or precision resistive), and a high-bandwidth analog power monitor (PMON) outputting VPMON = 35×(VSEN−RTN)×(VDROOP−VO) for instantaneous CPU power estimation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Regulator Type | Single-phase synchronous buck controller with integrated 2A UGATE/LGATE drivers for IMVP-6™ CPU core voltage regulation |
| Output Voltage Range | 0.300V to 1.500V in 12.5mV steps via 7-bit VID interface; supports on-the-fly VID changes |
| Voltage Accuracy | ±0.5% over –10°C to +100°C (active mode); ±0.8% over full –40°C to +105°C operating range |
| Switching Frequency | User-programmable 200–500 kHz via resistor on VW pin; nominal 333 kHz at RFSET = 7 kΩ |
| Protection Features | Overvoltage (145–250 mV above setpoint), undervoltage (–220 to –380 mV), overcurrent (OCSET-based droop threshold), thermal shutdown (NTC-based VR_TT#) |
| Package & Temp Range | 40-lead 6×6 mm QFN; rated for –40°C to +105°C ambient, AEC-Q100 qualified |
| Power Monitor | PMON pin outputs analog voltage proportional to instantaneous CPU power: VPMON = 35×(VSEN−RTN)×(VDROOP−VO), bandwidth sufficient for switching ripple capture |
Pinout & Package
ISL78211ARZ-T is housed in a thermally enhanced 40-lead 6×6 mm QFN package with exposed metal pad (bottom-side GND) for improved heat dissipation in automotive under-hood environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FDE | Forced Diode Emulation Enable | Logic-high assertion with DPRSTP# low forces Enhanced Diode Emulation Mode (EDEM) to reduce light-load switching frequency and maximize efficiency |
| PMON | Power Monitor Output | Analog voltage representing instantaneous CPU power; used by system firmware for dynamic power optimization and battery runtime extension |
| RBIAS | Internal Current Reference Bias | 147 kΩ resistor to VSS sets 10 µA reference current for OCSET and other internal circuits |
| VR_TT# | Thermal Overload Indicator | Open-drain output pulled low when junction temperature exceeds threshold; driven by internal NTC network |
| VID0–VID6 | 7-bit Voltage Identification Input | LSB-to-MSB digital input defining target output voltage per IMVP-6™ specification; supports dynamic VID updates |
| UGATE / LGATE | Upper/Lower Gate Drive Outputs | Integrated 2A peak-source/sink drivers with <1.5 Ω on-resistance; support external N-channel MOSFETs in synchronous buck topology |
| VSEN / RTN | Differential Remote Sense Inputs | Direct connection to CPU die sense points enables precise regulation of core voltage at point-of-load, meeting IMVP-6™ accuracy requirements |
| PGOOD | Power-Good Status Output | Open-drain signal asserted ~7 ms after start-up when VO is within tolerance; requires external pull-up to VCCP or 3.3V |
Key Features
| Feature | Design Value |
|---|---|
| R3™ Robust Ripple Regulator Modulator | Enables variable-frequency operation during load transients for >2× faster voltage recovery vs. fixed-frequency PWM, without sacrificing steady-state ripple or phase jitter |
| Three Efficiency Modes (CCM/DEM/EDEM) | Automatically transitions between Continuous Conduction, Diode Emulation, and Enhanced Diode Emulation based on CPU sleep state signals (DPRSLPVR/DPRSTP#) to extend battery life |
| Differential Remote Sensing (VSEN/RTN) | Compensates PCB IR drop to regulate voltage directly at CPU die, achieving ±0.5% system accuracy across temperature and load |
| DCR Current Sensing with NTC Compensation | Eliminates sense resistor losses while maintaining load-line accuracy over temperature via thermistor network correcting copper winding resistance drift |
| High-Bandwidth Power Monitor (PMON) | Delivers real-time analog CPU power signal (VPMON) for firmware-level thermal/power management, including ripple-aware instantaneous power estimation |
Applications
| Automotive Infotainment CPU Power | ADAS Domain Controller Core Supply |
|---|---|
|
Use Scenario: Powering ARM Cortex-A76/A78 or Intel Atom-based infotainment SoCs in vehicle head units requiring IMVP-6™ compliance and thermal robustness. IC Role / Device Role / Timing Role: Single-phase core regulator delivering up to 25A with dynamic VID scaling, remote die sensing, and AEC-Q100 qualification. Use Value: Enables precise voltage positioning across CPU P-states while maintaining ±0.5% accuracy at die, reducing thermal throttling and improving UI responsiveness. |
Use Scenario: Supplying core voltage to NVIDIA Orin or Qualcomm SA8540P domain controllers in autonomous driving systems with strict safety and efficiency demands. IC Role / Device Role / Timing Role: IMVP-6™-compliant buck controller with PMON output feeding real-time power data to ASIL-B safety monitors. Use Value: Provides instantaneous CPU power telemetry for functional safety diagnostics and dynamic thermal budget allocation across sensor fusion workloads. |
| Electric Vehicle Telematics Gateway | Automotive Instrument Cluster MCU Supply |
|
Use Scenario: Regulating core voltage for cellular/V2X SoCs (e.g., Qualcomm Snapdragon Automotive) in telematics control units operating continuously in hot under-hood environments. IC Role / Device Role / Timing Role: Automotive-qualified buck controller with NTC-compensated DCR sensing and VR_TT# thermal alert for extended reliability. Use Value: Maintains stable core voltage despite wide ambient swings (–40°C to +105°C), preventing brownouts during LTE handover or OTA update bursts. |
Use Scenario: Powering Renesas RH850 or NXP S32K MCUs in digital instrument clusters where low-light-load efficiency directly impacts dashboard battery drain. IC Role / Device Role / Timing Role: Efficiency-optimized regulator supporting DEM/EDEM modes triggered by MCU sleep states (DPRSLPVR/DPRSTP#). Use Value: Reduces quiescent current by enabling diode emulation at light loads, extending vehicle "key-off" battery life by >30% versus CCM-only solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar single-phase IMVP-6™ CPU core regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL78213ARZ-T | Pin-compatible dual-phase variant with identical VID interface, R3™ modulator, and feature set; supports higher current (up to 50A) via phase interleaving | Required when CPU power demand exceeds 25A or when lower output ripple/noise is mandated | Select ISL78213ARZ-T only if board layout accommodates second power stage; not a drop-in replacement due to doubled gate drive and current sense channels |
| RTQ2134BGQW | Monolithic 30A buck converter (no external MOSFETs); lacks IMVP-6™ VID interface, PMON, and differential remote sensing | Suitable for non-Intel embedded processors without dynamic voltage positioning requirements | Choose RTQ2134BGQW for cost-sensitive, non-IMVP applications where integration outweighs protocol compliance and telemetry needs |
Compared with ISL78211ARZ-T, ISL78213ARZ-T scales current capacity while retaining identical control architecture and telemetry, whereas RTQ2134BGQW trades protocol fidelity and monitoring capability for monolithic simplicity and lower BOM count in non-IMVP designs.
Availability
ISL78211ARZ-T is available at Aetrix Electronics and suitable for automotive infotainment, ADAS domain controllers, and electric vehicle telematics gateways requiring stable component supply, AEC-Q100 qualification, and IMVP-6™ compliance.
Supply support for ISL78211ARZ-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
Intersil (now part of Renesas Electronics) is a semiconductor company specializing in high-performance analog and power management ICs for automotive, industrial, and computing markets.
The ISL78211ARZ-T belongs to Intersil's automotive power management product line, designed specifically for Intel IMVP-6™-compliant CPU core regulation in demanding vehicular environments with emphasis on transient response, thermal resilience, and system-level power telemetry.
FAQ
What is the primary function of the ISL78211ARZ-T in an automotive CPU power system?
The ISL78211ARZ-T serves as a single-phase synchronous buck controller implementing Intel IMVP-6™ protocol to regulate core voltage for automotive microprocessors. It integrates gate drivers, VID decoding, remote sensing, and power telemetry-enabling precise, adaptive, and thermally robust CPU power delivery up to 25A in vehicles.
Does the ISL78211ARZ-T support differential remote voltage sensing, and how is it implemented?
Yes, the ISL78211ARZ-T supports true differential remote sensing via dedicated VSEN and RTN pins connected directly to the CPU die. This configuration allows the internal unity-gain differential amplifier to measure and regulate voltage at the point-of-load, achieving ±0.5% system accuracy over temperature and compensating for PCB trace resistance.
How does the R3™ modulator in the ISL78211ARZ-T improve transient response compared to conventional PWM controllers?
The R3™ modulator in the ISL78211ARZ-T synthesizes a noise-free analog representation of inductor ripple current and uses hysteretic comparators to command variable switching frequency during load transients. This eliminates fixed-frequency delay limitations, enabling faster voltage recovery-critical for modern CPU burst-mode operation.
What are the three operational modes of the ISL78211ARZ-T, and how are they selected?
The ISL78211ARZ-T operates in Continuous Conduction Mode (CCM), Diode Emulation Mode (DEM), and Enhanced Diode Emulation Mode (EDEM). Mode selection is controlled by DPRSLPVR, DPRSTP#, and FDE logic inputs-automatically adapting to CPU sleep states to maximize light-load efficiency without external intervention.
Is the ISL78211ARZ-T qualified for automotive use, and what standards does it meet?
Yes, the ISL78211ARZ-T is AEC-Q100 qualified for automotive applications and rated for –40°C to +105°C ambient operation. It meets RoHS compliance (Pb-free), supports Pb-free reflow profiles, and incorporates protection features-including overvoltage, undervoltage, overcurrent, and thermal shutdown-required for under-hood reliability.
ISL78211ARZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 40-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Applications:
- Converter, Intel IMVP-6
- Voltage - Input:
- 5V ~ 21V
- Number of Outputs:
- 1
- Voltage - Output:
- 0.3V ~ 1.5V
- Operating Temperature:
- -40°C ~ 105°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-QFN (6x6)
ISL78211ARZ-T FAQ
1.How can I place an order for ISL78211ARZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL78211ARZ-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 ISL78211ARZ-T reliable?
The price and inventory of ISL78211ARZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL78211ARZ-T is usually 5 days.
3.What payment methods are accepted for ISL78211ARZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL78211ARZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL78211ARZ-T?
ISL78211ARZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL78211ARZ-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 ISL78211ARZ-T?
For technical support, including ISL78211ARZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL78211ARZ-T requirements.
6.How does Aetrix verify that ISL78211ARZ-T is sourced from the original manufacturer or authorized distributors?
All ISL78211ARZ-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 ISL78211ARZ-T meets industry standards.
7.What is the process for return or replacement of ISL78211ARZ-T?
All ISL78211ARZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL78211ARZ-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 ISL78211ARZ-T part is unused and in its original packaging.
Return procedure for ISL78211ARZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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