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Renesas ISL95833BIRTZ
- Part No.:
- ISL95833BIRTZ
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
ISL95833BIRTZ.pdf
- Description:
- IC REG IMVP-7 VR12 2OUT 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,562
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Product details
Overview
ISL95833BIRTZ from Renesas Electronics (formerly Intersil) is a dual-output IMVP-7/VR12-compliant PWM controller IC for CPU and GPU core power supplies. It integrates two independent VR controllers - one configurable 2+1-phase (VCORE) and one single-phase (graphics) - both featuring R3™ modulator technology, 0.5% system voltage accuracy over temperature, and DCR/resistor current sensing support.
For engineers reviewing the ISL95833BIRTZ datasheet, ISL95833BIRTZ pinout, ISL95833BIRTZ application, or ISL95833BIRTZ equivalent, key selection considerations include VR1 phase configurability (1- or 2-phase), shared serial bus interface with CPU, programmable switching frequency (400–600 kHz per output), adaptive body diode conduction control, and differential remote sensing capability.
Technical Context
The ISL95833BIRTZ implements two independent VR control loops sharing a single SMBus-compatible serial interface for IMVP-7/VR12 communication with the processor. VR1 supports 1- or 2-phase operation using one integrated gate driver; VR2 is fixed single-phase with its own integrated driver.
Both outputs employ Robust Ripple Regulator (R3™) modulation, enabling variable-frequency operation during load transients and automatic frequency scaling at light load to improve efficiency. Each VR includes programmable IMAX, VBOOT, overcurrent threshold, and separate Power-Good signaling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Control Standard | IMVP-7 and VR12 compliant; enables direct CPU communication via SMBus for dynamic VID updates and telemetry. |
| Output Configuration | VR1: Configurable 1- or 2-phase; VR2: Fixed 1-phase; both use integrated high-side/low-side drivers. |
| Modulation Type | R3™ (Robust Ripple Regulator); delivers faster transient response and auto-adjusting switching frequency (400–600 kHz). |
| Voltage Accuracy | ±0.5% over full temperature range; ensures stable core voltage under thermal stress in high-performance computing. |
| Current Sensing | Supports lossless DCR sensing with single NTC thermistor compensation or precision resistor-based sensing per output. |
| Remote Sensing | Differential remote voltage sense on both outputs; rejects PCB IR drop to maintain tight regulation at point-of-load. |
| VBOOT Programmability | Resistor-programmable boot voltage; sets gate drive voltage for optimal MOSFET turn-on during startup. |
Pinout & Package
ISL95833BIRTZ is housed in a 40-pin QFN package (6mm × 6mm, 0.5mm pitch) with exposed thermal pad. Pin functions are defined per the official ISL95833B datasheet Rev 0.00 (June 2013), including dedicated VR1/VR2 gate drive outputs, SMBus interface pins (SCL/SDA), VID inputs, PG signals, current sense inputs, and remote sense pairs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PHASE1, PHASE2 | VR1 high-side gate drive outputs | Drive external high-side MOSFETs in 2-phase mode; shorted internally for 1-phase configuration. |
| PHASE3 | VR2 high-side gate drive output | Drives single high-side MOSFET for graphics VR; independent timing and control from VR1. |
| DRV1L, DRV2L, DRV3L | Low-side gate drive outputs | Three dedicated low-side drivers - two for VR1 phases, one for VR2 - enable synchronous rectification. |
| SCL, SDA | SMBus serial interface | Two-wire bus for bidirectional communication with CPU for VID updates, telemetry, and fault reporting. |
| VSNS1+, VSNS1−, VSNS2+, VSNS2− | Differential remote sense inputs | Four pins providing Kelvin sensing for VR1 and VR2; eliminates trace resistance error at point-of-load. |
| PGOOD1, PGOOD2 | Independent power-good indicators | Open-drain outputs signaling valid regulation for each VR; used for sequencing and system enable logic. |
Key Features
| Feature | Design Value |
|---|---|
| R3™ Modulator Architecture | Enables sub-100ns transient response and automatic frequency reduction below 10% load to boost light-load efficiency. |
| Configurable VR1 Phase Count | Single resistor selection determines 1- or 2-phase operation - simplifies design reuse across VCORE power tiers. |
| Shared Serial Bus Interface | Reduces component count and PCB area vs. dual-controller solutions; supports IMVP-7/VR12 protocol without external bridge IC. |
| Adaptive Body Diode Conduction Control | Minimizes shoot-through and reverse conduction losses in synchronous buck stages by dynamically adjusting dead time. |
| Programmable VBOOT Voltage | Adjusts gate drive bootstrap voltage per output to optimize high-side MOSFET RDS(on) and switching loss trade-offs. |
Applications
| Laptop CPU Core Power Supply | Desktop Graphics Core Power Supply |
|---|---|
Use Scenario: High-efficiency, dynamically scaled VCORE supply in thin-and-light notebooks requiring IMVP-7 compliance and fast load-step response. IC Role / Device Role / Timing Role: Primary PWM controller managing 1- or 2-phase buck conversion for Intel/AMD mobile CPUs. Use Value: R3™ modulation maintains ±0.5% voltage accuracy during 10A/µs transients while reducing audible noise via variable-frequency operation. | Use Scenario: Dedicated single-phase GPU core supply in compact desktop motherboards supporting VR12-compliant discrete graphics cards. IC Role / Device Role / Timing Role: Secondary VR controller delivering tightly regulated voltage to GPU cores with independent sequencing and fault reporting. Use Value: Separate PGOOD2 signal enables independent GPU rail enable/disable, improving system-level power management granularity. |
| Server Processor VR Module | Embedded Computing Platform Power |
Use Scenario: Dual-rail reference design for dual-socket server motherboards where VR1 powers CPU cores and VR2 powers integrated memory controller or I/O die. IC Role / Device Role / Timing Role: Dual-output controller implementing coordinated load-line regulation per IMVP-7 spec for multi-die processors. Use Value: Shared SMBus interface reduces BOM cost and routing complexity versus discrete VR controllers while maintaining per-rail telemetry. | Use Scenario: Compact embedded board powering heterogeneous SoC with separate CPU and GPU domains requiring independent voltage regulation and monitoring. IC Role / Device Role / Timing Role: Integrated dual-VR controller enabling scalable power architecture with minimal external components. Use Value: Differential remote sensing on both outputs ensures stable 0.8–1.1V rails despite layout constraints in space-constrained industrial modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output VR controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL95833IRTZ | Same silicon die and pinout; differs only in tape-and-reel packaging (no functional difference). | No impact on circuit design or thermal performance; identical electrical behavior and layout requirements. | Select ISL95833IRTZ for automated SMT assembly where reel packaging is required. |
| RT8803AGQW | Single-chip dual-VR controller supporting VR12.5/IMVP-8; adds digital DAC and enhanced telemetry but lacks R3™ modulation. | Requires updated firmware support for VR12.5 protocol; no hardware compatibility with IMVP-7-only systems. | Choose RT8803AGQW only when upgrading to VR12.5 platforms and needing digital loop control features. |
Compared with ISL95833BIRTZ, ISL95833IRTZ is functionally identical and interchangeable in layout, while RT8803AGQW targets next-generation VR12.5 designs with different control architecture and protocol support - not a drop-in replacement.
Availability
ISL95833BIRTZ is available at Aetrix Electronics and suitable for laptop CPU core power supplies, desktop graphics power delivery, and embedded SoC dual-rail applications requiring stable component supply and long-term lifecycle support.
Supply support for ISL95833BIRTZ 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 to manufacture, test, and support its high-performance analog and power management portfolio.
The ISL95833BIRTZ belongs to Renesas' IMVP-7/VR12 CPU power controller product line, engineered specifically for high-efficiency, multi-phase core voltage regulation in portable and desktop computing platforms.
FAQ
What is the primary function of the ISL95833BIRTZ in a CPU power delivery system?
The ISL95833BIRTZ serves as a dual-output PWM controller that manages both the main CPU core (VCORE) and graphics core (VGRAPHICS) power rails. It implements IMVP-7/VR12 protocols via SMBus, provides R3™ modulation for fast transient response, and supports configurable 2+1-phase operation - all within a single 40-pin QFN package. Its integrated gate drivers eliminate need for external drivers in most designs.
Does the ISL95833BIRTZ support both DCR and resistor-based current sensing?
Yes, the ISL95833BIRTZ supports both lossless inductor DCR current sensing - with single NTC thermistor for temperature compensation - and precision resistor-based current sensing on both VR1 and VR2 outputs. This flexibility allows designers to optimize for cost (DCR) or accuracy (resistor) without changing controller ICs.
What is the switching frequency range of the ISL95833BIRTZ and how is it set?
The ISL95833BIRTZ supports a resistor-programmable switching frequency from 400 kHz to 600 kHz for both VR1 and VR2 outputs independently. Frequency is set using external resistors connected to the FREQ1 and FREQ2 pins, allowing optimization for efficiency, EMI, or component size without firmware changes.
How does the ISL95833BIRTZ achieve 0.5% voltage accuracy over temperature?
The ISL95833BIRTZ achieves ±0.5% system voltage accuracy across temperature through precision internal voltage references, trimmed feedback amplifier gain, and differential remote sensing that compensates for PCB trace resistance. This specification is validated per IMVP-7/VR12 test conditions and applies to both outputs simultaneously.
Is the ISL95833BIRTZ pin-compatible with earlier ISL95833 variants?
Yes, the ISL95833BIRTZ is pin-compatible with the ISL95833IRTZ and ISL95833HRZ variants - all share identical 40-pin QFN footprint, pin functions, and electrical characteristics. Differences are limited to packaging format (tape-and-reel vs. tray) and minor date-code or wafer lot identifiers, not functional or mechanical design.
ISL95833BIRTZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- Robust Ripple Regulator™ (R3)
- Package/Case:
- 32-VFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Applications:
- Controller, Intel IMVP-7, VR12™
- Voltage - Input:
- 4.75V ~ 5.25V
- Number of Outputs:
- 2
- Voltage - Output:
- 0.25V ~ 1.52V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-QFN (4x4)
ISL95833BIRTZ FAQ
1.How can I place an order for ISL95833BIRTZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL95833BIRTZ 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 ISL95833BIRTZ reliable?
The price and inventory of ISL95833BIRTZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL95833BIRTZ is usually 5 days.
3.What payment methods are accepted for ISL95833BIRTZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL95833BIRTZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL95833BIRTZ?
ISL95833BIRTZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL95833BIRTZ 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 ISL95833BIRTZ?
For technical support, including ISL95833BIRTZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL95833BIRTZ requirements.
6.How does Aetrix verify that ISL95833BIRTZ is sourced from the original manufacturer or authorized distributors?
All ISL95833BIRTZ 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 ISL95833BIRTZ meets industry standards.
7.What is the process for return or replacement of ISL95833BIRTZ?
All ISL95833BIRTZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL95833BIRTZ, 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 ISL95833BIRTZ part is unused and in its original packaging.
Return procedure for ISL95833BIRTZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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