My Inquiry
My Account
Renesas ISL6373IRTZ
- Part No.:
- ISL6373IRTZ
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
ISL6373IRTZ.pdf
- Description:
- IC REG CTRLR INTEL 1OUT 40TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,708
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ISL6373IRTZ from Intersil is a hybrid digital 4-phase PWM controller compliant with Intel VR12.5/VR12 specifications, designed to regulate microprocessor core or memory voltage rails. It delivers ±0.5% closed-loop system accuracy, supports up to 2MHz per phase switching, implements EAPP modulation for fast transient response, and enables auto-phase shedding across 1–4 phases for light-to-full-load efficiency optimization in server and desktop CPU power delivery.
For engineers reviewing the ISL6373IRTZ datasheet, ISL6373IRTZ pinout, ISL6373IRTZ application, or ISL6373IRTZ equivalent, key selection considerations include VR12.5/VR12 compliance, SVID/SMBus/PMBus interface conflict-free operation with CPU buses, programmable PSI#-driven phase states (PSI1/PSI2/PSI3), droop control via FB pin current sensing, and thermal monitoring via TM pin with NTC thermistor interface.
Technical Context
The ISL6373IRTZ integrates Intersil's patented Enhanced Active Pulse Positioning (EAPP) modulation to achieve sub-microsecond transient response without requiring external NVM or firmware. It supports SerialVID programming of IMAX, TMAX, BOOT, and ADDRESS OFFSET registers and operates with SVID bus coordination while avoiding signal conflicts with the CPU's native SVID interface.
It implements precision current sensing via dedicated resistor or DCR-based feedback, feeding current data to the FB pin for droop control and to the IMON pin for telemetry reporting via IOUT register. Phase management includes programmable 1-/2-phase operation in PSI1 mode and single-phase diode emulation in PSI2/PSI3 modes, with automatic phase re-addition upon PSI# de-assertion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Phases | 4-phase PWM controller with auto-phase shedding down to 1 phase |
| Compliance | Fully compliant with Intel VR12.5 and VR12 specifications for core/memory VRs |
| Accuracy | ±0.5% closed-loop system accuracy over load, line, and temperature |
| Switching Frequency | Up to 2MHz per phase, with variable frequency control during transients |
| Interface | SMBus/PMBus/I²C with SVID bus conflict-free operation |
| Current Sensing | Differential sensing via precision resistor or inductor DCR; IMON pin reports real-time load current |
| Thermal Monitoring | TM pin interfaces NTC thermistor; digitized internally for thermal compensation of current sense |
Pinout & Package
ISL6373IRTZ is housed in a 48-pin QFN package (7mm × 7mm, 0.5mm pitch) with exposed thermal pad. Pin assignment is validated per Intersil FN8350 Rev 0.00 datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply rail | Power input for controller internal circuitry and gate drivers (4.5V to 24V) |
| VOUT_SENSE+ | Remote voltage sense positive | Differential remote sensing input to eliminate ground potential differences and improve regulation accuracy |
| VOUT_SENSE− | Remote voltage sense negative | Paired with VOUT_SENSE+ for Kelvin sensing at load point |
| FB | Feedback reference | Develops precision droop voltage drop via sensed current; sets output voltage position vs. load |
| IMON | Current monitor output | Analog current-sense output used for telemetry and protection; feeds IOUT register via SMBus |
| TM | Temperature monitor input | Accepts NTC thermistor voltage; enables digitized thermal monitoring and current-sense compensation |
| PSI# | Power state indicator input | Active-low signal from CPU indicating PSI1/PSI2/PSI3 low-power states; triggers phase shedding |
| EN | Enable input | Threshold-sensitive enable for precise power-rail sequencing coordination |
Key Features
| Feature | Design Value |
|---|---|
| EAPP Modulation | Proprietary hybrid digital scheme enabling ultra-fast transient response with reduced output capacitance |
| Auto Phase Shedding | Dynamic reduction from 4 to 1 phase based on load and PSI# status, optimizing light-load efficiency without sacrificing transient performance |
| Droop Control Architecture | Current-sense-derived voltage drop at FB pin provides accurate load-line regulation per VR12.5/VR12 spec |
| SVID Conflict-Free Interface | Independent SMBus/PMBus/I²C interface avoids contention with CPU's SVID bus, simplifying system integration |
| True Catastrophic Failure Protection (CFP) | Hardware-level protection against short-circuit, overvoltage, and undervoltage faults independent of communication interface |
Applications
| Server CPU Core VR | Desktop CPU Memory VR |
|---|---|
Use Scenario: Regulating core voltage for dual-socket Xeon processors under dynamic workloads including virtualization and high-frequency compute bursts. IC Role / Device Role / Timing Role: Primary 4-phase VR controller implementing VR12.5 droop, SVID coordination, and PSI#-driven phase shedding. Use Value: Maintains ±0.5% output accuracy across −40°C to +125°C while reducing light-load losses by disabling unused phases and enabling diode emulation. | Use Scenario: Delivering tightly regulated DDR3/DDR4 memory VDDQ rail in high-end desktop motherboards with overclocking support. IC Role / Device Role / Timing Role: VR12-compliant memory regulator using DCR current sensing and programmable slew rate for Dynamic VID transitions. Use Value: Enables stable memory voltage positioning during rapid VID changes and improves transient margin with EAPP-modulated PWM pulses. |
| Laptop High-Performance CPU VR | Workstation GPU Core VR |
Use Scenario: Powering quad-core mobile CPUs in thin-and-light notebooks with aggressive thermal constraints and battery-life requirements. IC Role / Device Role / Timing Role: Hybrid digital controller managing 2–4 phases with PSI2/PSI3 entry into single-phase diode-emulation mode. Use Value: Achieves >90% efficiency at 10% load via magnetic loss reduction and eliminates need for external NVM/firmware updates. | Use Scenario: Supplying GPU core voltage in professional workstation graphics cards under sustained rendering loads and thermal throttling events. IC Role / Device Role / Timing Role: Precision current-balanced 4-phase controller with TM-pin thermal compensation and average overcurrent protection per phase. Use Value: Prevents thermal runaway via NTC-based current-sense calibration and sustains transient response during GPU boost clock transitions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-phase VR controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IR35201MTRPBF | Full digital PMBus controller with embedded NVM; requires firmware update capability; no SVID conflict-free mode | Targeted at systems needing full telemetry logging and field-upgradable configurations, not CPU-integrated SVID coordination | Choose IR35201MTRPBF only if firmware flexibility and PMBus logging outweigh VR12.5 SVID timing compatibility needs |
| TPS53679RSLR | Analog-based 4-phase controller with proprietary Auto-Phase Shedding; no SMBus/PMBus; uses analog VID pins instead of SVID | Suitable for cost-sensitive industrial or embedded platforms lacking CPU SVID interface | Select TPS53679RSLR when SVID bus coordination is unnecessary and analog VID control suffices |
Compared with IR35201MTRPBF and TPS53679RSLR, the ISL6373IRTZ uniquely balances VR12.5 compliance, SVID conflict-free digital interface, and hybrid architecture-eliminating NVM while delivering deterministic phase-shedding behavior critical for CPU power states.
Availability
ISL6373IRTZ is available at Aetrix Electronics and suitable for server CPU core regulation, desktop memory VR design, laptop high-performance CPU power delivery, and workstation GPU core voltage applications requiring stable component supply and long-term lifecycle support.
Supply support for ISL6373IRTZ 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 Corporation, now part of Renesas Electronics, designs high-performance analog and power management ICs for computing, industrial, and communications markets.
The ISL6373IRTZ belongs to Intersil's EAPP Hybrid Digital VR Controller product line, engineered specifically for Intel VR12.5/VR12-compliant CPU and memory voltage regulation with emphasis on transient speed, light-load efficiency, and SVID coexistence.
FAQ
What is the primary function of the ISL6373IRTZ in a CPU power delivery system?
The ISL6373IRTZ serves as a hybrid digital 4-phase PWM controller that regulates microprocessor core or memory voltage rails per Intel VR12.5/VR12 specifications. It implements droop control via FB pin current sensing, executes auto-phase shedding based on PSI# signals, and maintains ±0.5% output accuracy across temperature and load. Its EAPP modulation ensures fast transient response without external NVM, making ISL6373IRTZ ideal for high-performance CPU VR applications.
Does the ISL6373IRTZ support both core and memory voltage regulation?
Yes, the ISL6373IRTZ is explicitly designed for both Intel VR12.5 core and VR12/VR12.5 memory voltage regulation. It supports SerialVID programming of IMAX, TMAX, BOOT, and ADDRESS OFFSET registers required for both domains and features differential remote sensing and droop control architectures validated for tight memory VDDQ regulation. The ISL6373IRTZ datasheet confirms dual-role capability without hardware modification.
How does the ISL6373IRTZ handle thermal compensation during operation?
The ISL6373IRTZ uses its TM pin to interface with an external NTC thermistor, digitizing temperature data internally to compensate current-sense elements in real time. This integrated thermal compensation ensures consistent droop slope and current reporting accuracy across operating temperatures. The ISL6373IRTZ applies this correction directly to DCR/resistor-based current sensing paths, maintaining ±0.5% system accuracy from −40°C to +125°C.
Can the ISL6373IRTZ operate without firmware or NVM configuration?
Yes, the ISL6373IRTZ is a hybrid digital controller that eliminates the need for embedded NVM or firmware updates. Configuration is performed dynamically via SMBus/PMBus/I²C commands-including SerialVID register writes-and all operational parameters (e.g., phase count, PSI behavior, droop slope) are set at runtime. This NVM-free architecture reduces BOM cost and simplifies qualification, distinguishing ISL6373IRTZ from full-digital alternatives.
What protection features does the ISL6373IRTZ provide for overcurrent and thermal faults?
The ISL6373IRTZ includes True Catastrophic Failure Protection (CFP), average overcurrent protection per phase, individual channel current limiting, and precision overcurrent detection on the IMON pin. It also monitors temperature via the TM pin and integrates thermal compensation into current sensing. Output voltage open-sensing protection and configurable protection disable options further enhance system robustness-making ISL6373IRTZ suitable for mission-critical CPU VR applications.
ISL6373IRTZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 40-VFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Applications:
- Controller, Intel VR12, VR12.5
- Voltage - Input:
- 4.75V ~ 5.25V
- Number of Outputs:
- 1
- Voltage - Output:
- 0.25V ~ 3.04V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-TQFN (5x5)
ISL6373IRTZ FAQ
1.How can I place an order for ISL6373IRTZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6373IRTZ 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 ISL6373IRTZ reliable?
The price and inventory of ISL6373IRTZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6373IRTZ is usually 5 days.
3.What payment methods are accepted for ISL6373IRTZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6373IRTZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6373IRTZ?
ISL6373IRTZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6373IRTZ 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 ISL6373IRTZ?
For technical support, including ISL6373IRTZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6373IRTZ requirements.
6.How does Aetrix verify that ISL6373IRTZ is sourced from the original manufacturer or authorized distributors?
All ISL6373IRTZ 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 ISL6373IRTZ meets industry standards.
7.What is the process for return or replacement of ISL6373IRTZ?
All ISL6373IRTZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL6373IRTZ, 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 ISL6373IRTZ part is unused and in its original packaging.
Return procedure for ISL6373IRTZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL6373IRTZ 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…
