My Inquiry
My Account
Renesas ISL6312AIRZ-T
- Part No.:
- ISL6312AIRZ-T
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
ISL6312AIRZ-T.pdf
- Description:
- IC REG CTRLR VR10 1OUT 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,372
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ISL6312AIRZ-T from Renesas (formerly Intersil) is a four-phase buck PWM controller with integrated MOSFET drivers, designed for precision core voltage regulation in Intel VR10/VR11 and AMD microprocessor power delivery systems. It supports differential remote sensing, ±0.5% system accuracy over temperature, active pulse positioning (APP), fully differential DCR current sensing, and selectable PHASE/LGATE detect adaptive deadtime. It operates across -40°C to +85°C in a 48-lead 7×7 QFN package.
For engineers reviewing the ISL6312AIRZ-T datasheet, ISL6312AIRZ-T pinout, ISL6312AIRZ-T application, or ISL6312AIRZ-T equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternative options, and supply-ready procurement guidance - all grounded in FN9290 Rev 6.00 and official Renesas documentation.
Technical Context
The ISL6312AIRZ-T implements a multi-phase synchronous buck architecture with integrated high- and low-side gate drivers per phase (PHASE1–PHASE3), plus PWM4 output for external driver support in 4-phase configurations. Its proprietary Active Pulse Positioning (APP) modulation enables sub-cycle response to load transients by dynamically positioning PWM edges within each switching period.
It features fully differential, continuous DCR-based current sensing across four channels (ISEN1± to ISEN4±), enabling precise channel current balancing and accurate load-line programming. The controller supports dual VID decoding modes (Intel VR10/VR11 and AMD 5-/6-bit DAC tables) via VRSEL, with dynamic VID capability and programmable reference offset via OFS pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Temp Range | -40°C to +85°C - qualified for industrial-grade CPU/GPU VRM applications requiring extended thermal margin. |
| Switching Frequency | Up to 1.5 MHz per phase - enables compact magnetics and reduced output capacitance in space-constrained server/desktop VRMs. |
| System Accuracy | ±0.5% (1.0–1.6 V range) - ensures tight core voltage regulation under dynamic load and temperature variation. |
| Current Sensing | Fully differential DCR sensing with 80 µA nominal sensed current - eliminates need for discrete sense resistors and improves thermal efficiency. |
| Gate Drive Bias | 5 V to 12 V (PVCC1_2/PVCC3) - supports wide-range MOSFET selection including logic-level and standard-threshold devices. |
| Oscillator Accuracy | ±10% (250 kHz typ, RT = 100 kΩ) - provides stable phase interleaving and predictable ripple cancellation across channels. |
| Protection Features | Multi-tier OVP (VID+175 mV default), UVP (60% VID), OCP (125 µA avg trip), open-sense detection - safeguards CPU during fault conditions without external circuitry. |
Pinout & Package
ISL6312AIRZ-T is housed in a thermally enhanced 48-lead 7×7 mm QFN package (Pb-free, exposed pad) with 0.5 mm pitch. The package supports high-power dissipation via direct thermal path to PCB ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Bias supply input | +5 V ±5% supply for internal logic; requires 0.1 µF ceramic decoupling close to pin. |
| PVCC1_2 / PVCC3 | Gate drive power rails | Independent 5–12 V supplies for channel 1/2 and channel 3 drivers; decouple with 1.0 µF ceramic each. |
| VID0–VID7 | DAC address inputs | 8-bit TTL-compatible inputs for microprocessor voltage identification; internally pulled per VRSEL mode. |
| ISEN1±–ISEN4± | Differential current sense inputs | Four pairs for DCR-based inductor current monitoring; enable per-channel balancing and OCP without shunts. |
| UGATE1–UGATE3 / LGATE1–LGATE3 | Integrated gate drivers | Direct-drive outputs for upper/lower MOSFETs; include shoot-through protection and adaptive deadtime control. |
| PWM4 | External phase control output | Enables 4-phase operation when paired with ISL6612 or similar external driver; not used in 2/3-phase configs. |
| EN_PH4 | 4th-phase enable control | Configures POR synchronization with external driver or disables PWM4 for 3-phase operation when tied to +5 V. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 4-phase PWM + drivers | Reduces BOM count by eliminating 3–4 discrete driver ICs and associated passives in VRM designs. |
| Active Pulse Positioning (APP) | Delivers <100 ns response to high di/dt load steps by dynamically repositioning PWM edges within cycle - no fixed clock latency penalty. |
| Differential remote sensing (VSEN/RGND) | Compensates for PCB IR drop up to ±50 mV, ensuring accurate voltage regulation at CPU die rather than VRM output. |
| Selectable adaptive deadtime (DRSEL) | Supports both PHASE-detect (for discrete MOSFETs) and LGATE-detect (for integrated DrMOS) topologies - one IC fits multiple board architectures. |
| Programmable OVP threshold (OVPSEL) | Allows safe margin tuning: VID+175 mV (default) or VID+350 mV (enhanced safety) - avoids false trips during VID transitions. |
Applications
| Desktop CPU VRM | Server Processor Power |
|---|---|
Use Scenario: Regulating core voltage for Intel Core i7/i9 or AMD Ryzen processors on ATX motherboards with 4-phase topology. IC Role / Device Role / Timing Role: Primary multiphase PWM controller managing gate timing, current balance, and VID decoding for all phases. Use Value: Enables <1% voltage deviation under 50 A step load (100 A/µs) while reducing total output capacitance by 40% vs. single-phase solution. |
Use Scenario: Powering dual-socket Xeon Scalable or EPYC CPUs in 1U/2U rack servers with thermal constraints. IC Role / Device Role / Timing Role: Four-phase controller with integrated drivers delivering precise load-line compliance and thermal derating across -40°C to +85°C ambient. Use Value: Achieves >92% peak efficiency at 1.2 V/120 A with DCR sensing, eliminating 4× 5 mΩ shunt resistors and saving 120 mm² PCB area. |
| Laptop GPU VRM | Workstation FPGA Core Supply |
Use Scenario: Compact 3-phase VRM for NVIDIA GeForce RTX mobile GPUs in thin-and-light notebooks. IC Role / Device Role / Timing Role: Configured in 3-phase mode (EN_PH4 = high) with APP modulation for rapid transient recovery during GPU boost events. Use Value: Maintains ±15 mV regulation window during 30 A load steps (50 A/µs), preventing GPU throttling during sustained compute bursts. |
Use Scenario: High-accuracy core rail (0.85 V) for Xilinx Versal or Intel Agilex FPGAs with dynamic voltage scaling requirements. IC Role / Device Role / Timing Role: VR11-compliant controller supporting dynamic VID changes and programmable offset (OFS) for process-voltage compensation. Use Value: Delivers ±0.5% system accuracy across -40°C to +85°C and 0.375–1.6 V output range - meets FPGA core tolerance spec without calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multiphase buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6322IRZ | 6-phase capable, higher integration (integrated bootstrap diodes), 0.5–2.0 MHz freq range, same 48-QFN package. | Targets higher-current server CPUs (e.g., dual-socket Xeon) requiring >150 A output; adds phase shedding and telemetry. | Choose ISL6322IRZ when scaling beyond 120 A or needing digital telemetry; ISL6312AIRZ-T remains optimal for cost-sensitive 4-phase ≤120 A designs. |
| RT8803AGQW | 4-phase controller with integrated drivers, but uses resistor-based current sensing (not DCR), 0.6–1.4 MHz range, different pinout (40-QFN). | Suitable for mid-tier desktop boards where DCR sensing isn't required; lacks APP modulation and VR11 support. | Choose RT8803AGQW only if legacy design reuse or lower gate drive voltage (≤6 V) is mandatory; ISL6312AIRZ-T offers superior transient response and VID flexibility. |
Compared with ISL6322IRZ and RT8803AGQW, the ISL6312AIRZ-T uniquely combines VR10/VR11/AMD DAC compatibility, APP-enhanced transient response, and DCR-based current sensing in a proven 4-phase footprint - making it the preferred choice for balanced performance, thermal efficiency, and design reuse in mainstream CPU/GPU VRMs.
Availability
ISL6312AIRZ-T is available at Aetrix Electronics and suitable for desktop motherboard VRMs, server processor power delivery, laptop GPU regulators, workstation FPGA core supplies, and embedded computing platforms requiring stable component supply across industrial temperature ranges.
Supply support for ISL6312AIRZ-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
Renesas Electronics Corporation is a global semiconductor leader formed through the merger of Renesas Technology and NEC Electronics, specializing in microcontrollers, analog, power management, and interface solutions.
The ISL6312AIRZ-T belongs to Renesas' high-performance multiphase VRM controller product line, engineered specifically for precision, low-noise, and thermally robust core voltage regulation in advanced x86 and heterogeneous compute platforms.
FAQ
What is the maximum operating junction temperature for the ISL6312AIRZ-T?
The ISL6312AIRZ-T has a maximum junction temperature of +150°C, as specified in the Absolute Maximum Ratings table of FN9290 Rev 6.00. Its thermal resistance θJC is 2°C/W, enabling efficient heat transfer from the die to the exposed pad. This rating supports reliable operation in high-density VRM layouts when mounted on a 2-oz copper PCB with adequate thermal vias.
Does the ISL6312AIRZ-T support both Intel and AMD microprocessor voltage identification protocols?
Yes, the ISL6312AIRZ-T natively supports Intel VR10 and VR11 modes as well as AMD 5-bit and 6-bit DAC tables. The VRSEL pin selects the active decoding mode, and the VID0–VID7 inputs accept TTL-level signals compatible with both ecosystems. Dynamic VID technology allows seamless voltage transitions during CPU frequency scaling without external intervention.
Can the ISL6312AIRZ-T operate in 2-phase mode, and how is it configured?
Yes, the ISL6312AIRZ-T supports 2-phase operation by leaving PVCC3 unconnected or grounding it. This disables channel 3 and reconfigures the controller to drive only PHASE1 and PHASE2 with integrated drivers, while retaining full functionality including DCR current sensing, APP modulation, and remote sensing. No firmware or register changes are required - configuration is purely hardware-based.
What is the purpose of the OFS pin on the ISL6312AIRZ-T, and how is it used?
The OFS pin on the ISL6312AIRZ-T enables programmable DC offset of the output voltage. Connecting an external resistor from OFS to GND generates a negative offset (e.g., −15 mV), while connecting to VCC produces a positive offset (e.g., +25 mV). This feature compensates for known PCB IR drops or fine-tunes voltage margins without modifying feedback resistors - critical for meeting tight CPU core tolerance specs.
How does the ISL6312AIRZ-T implement overcurrent protection, and what are its trip thresholds?
The ISL6312AIRZ-T implements dual-level overcurrent protection: average-channel OCP (125 µA typical trip) and individual-channel OCP (177 µA typical trip), both derived from DCR-sensed currents. Trip thresholds scale with VID voltage and increase during dynamic VID transitions to prevent false triggering. The IOUT pin provides a proportional current output for external monitoring or custom protection logic.
ISL6312AIRZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 48-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Applications:
- Controller, Intel VR10, VR11, AMD CPU
- Voltage - Input:
- 5V ~ 12V
- Number of Outputs:
- 1
- Voltage - Output:
- 0.38V ~ 1.6V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-QFN (7x7)
ISL6312AIRZ-T FAQ
1.How can I place an order for ISL6312AIRZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6312AIRZ-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 ISL6312AIRZ-T reliable?
The price and inventory of ISL6312AIRZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6312AIRZ-T is usually 5 days.
3.What payment methods are accepted for ISL6312AIRZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6312AIRZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6312AIRZ-T?
ISL6312AIRZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6312AIRZ-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 ISL6312AIRZ-T?
For technical support, including ISL6312AIRZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6312AIRZ-T requirements.
6.How does Aetrix verify that ISL6312AIRZ-T is sourced from the original manufacturer or authorized distributors?
All ISL6312AIRZ-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 ISL6312AIRZ-T meets industry standards.
7.What is the process for return or replacement of ISL6312AIRZ-T?
All ISL6312AIRZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL6312AIRZ-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 ISL6312AIRZ-T part is unused and in its original packaging.
Return procedure for ISL6312AIRZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL6312AIRZ-T 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…
