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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Special Purpose Regulators

Renesas ISL6263ACRZ-T

Name: ISL6263ACRZ-T
Brand: Renesas
SKU: ISL6263ACRZ-T
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ISL6263ACRZ-T

Manufacturer:: Renesas

Category:: Special Purpose Regulators

Package:: 32-VFQFN Exposed Pad

Datasheet:: ISL6263ACRZ-T.pdf

Description:: IC REG CONV INTEL 1OUT 32QFN

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Product details

Overview

ISL6263ACRZ-T from Renesas (formerly Intersil) is a single-phase synchronous-buck PWM voltage regulator implementing Intel IMVP-6+ for GPU render engine core power delivery. It delivers precision 0.412–1.2875 V output with 0.5% system accuracy (0°C to +100°C), integrated MOSFET drivers, real-time power monitor (PMON), and Robust Ripple Regulator (R3) Technology™ for superior transient response up to 25 A in mobile graphics platforms.

For engineers reviewing the ISL6263ACRZ-T datasheet, ISL6263ACRZ-T pinout, ISL6263ACRZ-T application, or ISL6263ACRZ-T equivalent, key selection criteria include IMVP-6+ VID compliance, differential Kelvin sensing at GPU die, DCR/resistive current sensing flexibility, diode emulation mode (DEM) configurability, and 200–500 kHz programmable switching frequency.

Technical Context

The ISL6263ACRZ-T implements Intersil's R3 Technology™-a hybrid modulation combining fixed-frequency PWM stability with hysteretic-like transient responsiveness by dynamically varying switching frequency during load steps while maintaining tight regulation via an error amplifier. Its VID interface supports non-sequential on-the-fly voltage changes across 32 discrete levels (25.75 mV/step from 1.2875 V down to 0.515 V, then 103 mV step to 0.412 V).

It integrates dual-path sensing: true differential remote sensing (VSEN/RTN) for GPU die voltage regulation and droop-based current sensing (DROOP/VO) for IMVP-6+ load-line compliance and overcurrent protection. The PMON output provides analog voltage proportional to instantaneous V_OUT × I_OUT, supporting dynamic power management in Santa Rosa–era GPU platforms.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage Range	0.41200 V to 1.28750 V - Programmable via 5-bit VID inputs per IMVP-6+ spec; enables GPU render-core voltage scaling across performance/suspend states.
System Accuracy	±0.5% (0°C to +100°C, VID ≥ 0.74675 V) - Ensures stable GPU core voltage under thermal stress without calibration drift.
Switching Frequency	200 kHz to 500 kHz - Adjustable via VW pin resistor; balances efficiency, EMI, and inductor size for compact mobile GPU VRMs.
Current Sensing	DCR or resistive - Supports lossless inductor sensing or precision shunt-based current measurement for accurate load-line implementation.
Power Monitor Output	Voltage proportional to V_OUT × I_OUT - PMON pin delivers real-time analog power signal compliant with IMVP-6+ for GPU power gating and thermal throttling.
Protection Features	OVP (195 mV above VSOFT), UVP (−300 mV below VSOFT), OCP (configurable via OCSET) - Latched fault response with <2 µs short-circuit detection ensures GPU safety during abnormal conditions.
Operating Temp Range	−10°C to +100°C - Validated for industrial-grade GPU power delivery in laptop and embedded graphics modules.

Pinout & Package

ISL6263ACRZ-T is housed in a 32-lead 5 mm × 5 mm QFN package with exposed thermal pad (Pb-free, RoHS-compliant). The package supports high-current gate drive and efficient thermal dissipation in space-constrained GPU VRM layouts.

Pin/Terminal	Circuit Role	Design Meaning
RBIAS (1)	Reference bias input	Sets internal 10 µA current source; requires 150 kΩ ±1% resistor to VSS for accurate OCSET and droop calibration.
SOFT (2)	Soft-start & error amp non-inverting input	Controls output slew rate during startup and sets VID reference point; connects to CSOFT capacitor for both soft-start and dynamic VID transitions.
OCSET (3)	Overcurrent threshold programming	Configures OCP trip level via external resistor; ties to droop voltage to enforce IMVP-6+ load-line–based current limiting.
VW (4)	PWM frequency control	Sets nominal switching frequency (200–500 kHz) via resistor to COMP; also used to configure DEM frequency step-up.
COMP (5)	Error amplifier output	Drives R3 modulator; connects to VW network to generate frequency-controlling window voltage.
FB (6)	Error amplifier inverting input	Connects to VDIFF output; completes feedback loop for precise regulation using differential remote sense signals.
VDIFF (7)	Differential summing amplifier output	Combines VSEN, RTN, DROOP, and VO signals to generate composite feedback for IMVP-6+ compliance.
VSEN (8)	GPU die positive sense	Kelvin connection to GPU VCC_SNS; enables regulation at die rather than PCB output, compensating for IR drop.
RTN (9)	GPU die negative sense	Kelvin connection to GPU VSS_SNS; forms true differential pair with VSEN for noise-immune remote sensing.
DROOP (10)	Droop amplifier output	Carries current-proportional voltage (DROOP − VO) used for load-line regulation and OCP detection.
DFB (11)	Droop amplifier feedback	Closes droop amplifier loop; connects internally to inverting input for precise gain and offset control.
VO (12)	Output voltage reference	Connects to converter output; serves as reference for droop amplifier and UVP/OVP comparators.
VSUM (13)	Droop current sum node	Non-inverting input of droop amplifier; accepts DCR or resistive current sense signal for load-line generation.
VIN (14)	Input feed-forward	Provides input voltage feed-forward to R3 modulator for improved line transient response; connect near high-side FET drain.
VSS (15)	Analog ground	Primary analog reference; must be low-impedance and separated from PGND for noise-sensitive circuits.
VDD (16)	IC logic supply	+5 V ±5% supply for internal circuitry; requires ≥1 µF MLCC decoupling to VSS.
BOOT (17)	High-side gate driver supply	Bootstrap node for UGATE; requires MLCC between BOOT and PHASE for high-side drive.
UGATE (18)	High-side MOSFET gate driver	Drives high-side FET gate; 2 A sink/source capability with 1.0–1.5 Ω on-resistance supports fast switching.
PHASE (19)	High-side switch node	Monitors phase voltage polarity for DEM detection; connects to high-side FET drain and low-side FET source.
PGND (20)	Power ground return	Low-side gate driver return path; carries only LGATE sink current, not output current.
LGATE (21)	Low-side MOSFET gate driver	Drives low-side FET gate; 4 A sink capability (0.5–0.9 Ω) enables efficient DEM operation.
PVCC (22)	Gate driver supply	+5 V ±5% supply for both gate drivers; powers LGATE directly and feeds BOOT via internal bootstrap diode.
VID0–VID4 (23–27)	5-bit voltage ID inputs	LSB-to-MSB VID interface; supports non-sequential transitions and full 32-state IMVP-6+ voltage mapping (Table 2).
PMON (28)	Power monitor output	Analog voltage proportional to V_OUT × I_OUT; 2.0 mA sourcing/sinking capability enables fast transient tracking.
VR_ON (29)	Enable/disable control	Active-high logic input; enables regulator when >2.3 V, disables when <1.0 V; controls PGOOD and gate drivers.
AF_EN (30)	Audio filter enable	Configures audible-frequency PWM filter in DEM; used with FDE and VID to select DEM voltage window and filtering.
PGOOD (31)	Power-good indicator	Open-drain output; goes high-impedance after soft-start and 13 cycles once V_OUT reaches 90% of VID target.
FDE (32)	Frequency/diode emulation control	Programs DEM behavior with AF_EN and VID; selects 130%/150% nominal voltage window and audio filter activation.

Key Features

Feature	Design Value
Robust Ripple Regulator (R3) Technology™	Hybrid PWM/hysteretic modulation delivering <10 µs load transient response while maintaining ±0.5% static regulation accuracy across full VID range.
Differential Remote GPU Die Sensing	VSEN/RTN Kelvin interface eliminates PCB trace IR drop errors, enabling sub-10 mV regulation tolerance at GPU die under dynamic load.
Configurable Diode Emulation Mode (DEM)	Automatically enters DEM at light load; configurable 30%/50% VW step-up reduces switching losses and suppresses audible noise via optional PWM filter.
Integrated Power Monitor (PMON)	Real-time analog V_OUT × I_OUT output compliant with IMVP-6+, supporting GPU power capping, thermal management, and dynamic voltage/frequency scaling.
IMVP-6+ Load-Line Compliance	Droop amplifier + DROOP/VO sensing implements precise GPU load-line slope (e.g., 8 mΩ) for stable voltage positioning across 0–25 A load range.
Pre-biased Output Start-up	Supports start-up into pre-charged output capacitors without reverse current flow, critical for multi-rail GPU power sequencing.

Applications

Mobile GPU Core Power	Intel Santa Rosa Platform VRM
Use Scenario: Power delivery to NVIDIA or AMD discrete GPU render engines in thin-and-light laptops requiring dynamic voltage scaling and thermal-aware power management. IC Role / Device Role / Timing Role: Primary single-phase core voltage regulator implementing IMVP-6+ protocol; manages VID updates, droop compensation, and real-time power reporting via PMON. Use Value: Enables GPU performance states (P-states) with 25.75 mV granularity and <10 µs transient response, reducing thermal throttling and improving frame consistency.	Use Scenario: Integrated graphics voltage regulation in Intel Santa Rosa chipset-based notebooks with Mobile Core 2 Duo processors. IC Role / Device Role / Timing Role: IMVP-6+-compliant GPU core regulator; interfaces with chipset's VID bus and provides PGOOD signaling for system power sequencing. Use Value: Eliminates need for external current-sense resistors or discrete op-amps via integrated DCR sensing, droop amplifier, and Kelvin sensing-reducing BOM count by ≥4 components.
Embedded Graphics Modules	GPU Power Validation Boards
Use Scenario: Compact GPU power solution in industrial embedded systems (e.g., digital signage, medical imaging) where reliability and thermal headroom are critical. IC Role / Device Role / Timing Role: Single-phase synchronous buck controller with -10°C to +100°C operating range; supports long-term reliability under sustained 20 A loads. Use Value: Integrated MOSFET drivers, bootstrap diode, and protection logic reduce layout complexity and improve MTBF versus discrete gate driver solutions.	Use Scenario: Reference design for validating GPU VRM performance, including load-line accuracy, transient response, and power monitor linearity. IC Role / Device Role / Timing Role: Test vehicle for IMVP-6+ compliance verification; exposes all critical nodes (VSEN, DROOP, PMON, PGOOD) for oscilloscope probing. Use Value: Full pin access and documented startup timing (Figure 4), protection thresholds (Table 3), and VID table (Page 10) accelerate lab validation and failure analysis.

Mobile GPU Core Power

Intel Santa Rosa Platform VRM

Use Scenario: Power delivery to NVIDIA or AMD discrete GPU render engines in thin-and-light laptops requiring dynamic voltage scaling and thermal-aware power management.

IC Role / Device Role / Timing Role: Primary single-phase core voltage regulator implementing IMVP-6+ protocol; manages VID updates, droop compensation, and real-time power reporting via PMON.

Use Value: Enables GPU performance states (P-states) with 25.75 mV granularity and <10 µs transient response, reducing thermal throttling and improving frame consistency.

Use Scenario: Integrated graphics voltage regulation in Intel Santa Rosa chipset-based notebooks with Mobile Core 2 Duo processors.

IC Role / Device Role / Timing Role: IMVP-6+-compliant GPU core regulator; interfaces with chipset's VID bus and provides PGOOD signaling for system power sequencing.

Use Value: Eliminates need for external current-sense resistors or discrete op-amps via integrated DCR sensing, droop amplifier, and Kelvin sensing-reducing BOM count by ≥4 components.

Embedded Graphics Modules

GPU Power Validation Boards

Use Scenario: Compact GPU power solution in industrial embedded systems (e.g., digital signage, medical imaging) where reliability and thermal headroom are critical.

IC Role / Device Role / Timing Role: Single-phase synchronous buck controller with -10°C to +100°C operating range; supports long-term reliability under sustained 20 A loads.

Use Value: Integrated MOSFET drivers, bootstrap diode, and protection logic reduce layout complexity and improve MTBF versus discrete gate driver solutions.

Use Scenario: Reference design for validating GPU VRM performance, including load-line accuracy, transient response, and power monitor linearity.

IC Role / Device Role / Timing Role: Test vehicle for IMVP-6+ compliance verification; exposes all critical nodes (VSEN, DROOP, PMON, PGOOD) for oscilloscope probing.

Use Value: Full pin access and documented startup timing (Figure 4), protection thresholds (Table 3), and VID table (Page 10) accelerate lab validation and failure analysis.

Equivalent & Alternatives

The following parts are listed as comparable options for similar GPU core voltage regulation applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ISL6263AIRZ-T	Wider operating temperature range (−40°C to +100°C); same pinout, VID mapping, and R3 architecture.	Required for extended-temperature industrial or automotive-adjacent GPU applications; higher system-level qualification cost.	Select ISL6263AIRZ-T only if ambient exceeds −10°C or if long-term storage below −40°C is required.
RTQ2131BGQW	Single-phase IMVP-8-compliant controller; supports 0.25–1.5 V output, 30 A max, and digital SVID interface instead of analog VID.	Targets newer GPU platforms (e.g., Intel Gen 9+ graphics); lacks PMON analog output and R3 modulation-uses digital PID control.	ISL6263ACRZ-T remains optimal for legacy Santa Rosa–compatible designs; RTQ2131BGQW is not drop-in compatible due to SVID vs. VID and different pin functions.

Compared with ISL6263AIRZ-T, the ISL6263ACRZ-T trades extended temperature support for lower cost and qualification overhead in commercial laptop applications; compared with RTQ2131BGQW, it retains analog VID compatibility and R3 transient performance but lacks digital interface and higher current capability.

Availability

ISL6263ACRZ-T is available at Aetrix Electronics and suitable for mobile GPU core power, Intel Santa Rosa platform VRMs, and embedded graphics modules requiring stable component supply with full lifecycle support.

Supply support for ISL6263ACRZ-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 acquired Intersil in 2017 and maintains full technical and supply chain support for legacy Intersil power management ICs, including the ISL6263A family.

The ISL6263A product line was designed specifically for Intel IMVP-6+ GPU core voltage regulation in mobile platforms, emphasizing precision Kelvin sensing, integrated power monitoring, and R3 Technology™ for demanding graphics workloads.

FAQ

What is the maximum supported output current for the ISL6263ACRZ-T?

The ISL6263ACRZ-T is rated for applications up to 25 A, as specified in the official datasheet (FN9284 Rev.3.00, Page 1). This rating assumes proper thermal design using the 5×5 mm QFN package with exposed thermal pad, appropriate MOSFET selection, and adequate PCB copper area. Peak current capability depends on layout, inductor DCR, and ambient temperature-but the ISL6263ACRZ-T's gate drivers and protection circuits are validated for continuous 25 A operation in reference designs.

Does the ISL6263ACRZ-T support pre-biased output start-up?

Yes, the ISL6263ACRZ-T supports pre-biased output start-up, as confirmed in the "Features" section of the datasheet (Page 1). This allows the regulator to safely start into an already charged output capacitor without forcing reverse current through the low-side MOSFET body diode-a critical requirement for multi-rail GPU power systems where other rails may power up first. The ISL6263ACRZ-T achieves this via internal control logic that monitors PHASE and adjusts gate timing accordingly.

How does the ISL6263ACRZ-T implement IMVP-6+ load-line compliance?

The ISL6263ACRZ-T implements IMVP-6+ load-line compliance using its integrated droop amplifier and differential sensing. The DROOP pin voltage minus VO reflects inductor current; this difference is fed into the VDIFF amplifier along with VSEN/RTN signals. By configuring resistors on VSUM and OCSET, designers set the desired load-line slope (e.g., 8 mΩ) so that output voltage drops linearly with increasing current-ensuring stable GPU core voltage positioning per IMVP-6+ specification. This is detailed in Figures 2, 3, and 5 of the datasheet.

Can the ISL6263ACRZ-T operate with both DCR and resistive current sensing?

Yes, the ISL6263ACRZ-T supports both lossless inductor DCR current sensing and precision resistive (shunt-based) current sensing, as stated in the "Features" list (Page 1) and illustrated in Figures 2 and 3 of the datasheet. DCR sensing uses the inductor's intrinsic resistance with NTC compensation for temperature stability; resistive sensing employs an external shunt resistor. Both methods feed into the VSUM pin and are processed identically by the droop amplifier for load-line and OCP functions-giving designers flexibility based on cost, accuracy, and board space constraints.

What is the purpose of the PMON pin on the ISL6263ACRZ-T?

The PMON pin on the ISL6263ACRZ-T provides an analog voltage output proportional to the instantaneous product of output voltage and output current (V_OUT × I_OUT). As described in the "Power Monitor" section (Page 12), this signal is IMVP-6+ compliant and enables real-time GPU power monitoring for thermal management, dynamic power capping, and performance state transitions. The PMON pin offers 2.0 mA sourcing/sinking capability and operates across the full VID range, making it essential for closed-loop GPU power control in Santa Rosa–era platforms.

ISL6263ACRZ-T Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: Robust Ripple Regulator™ (R3)

Package/Case:: 32-VFQFN Exposed Pad

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Applications:: Converter, Intel IMVP-6

Voltage - Input:: 5V ~ 25V

Number of Outputs:: 1

Voltage - Output:: 0.41V ~ 1.29V

Operating Temperature:: -10°C ~ 100°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 32-QFN (5x5)

ISL6263ACRZ-T FAQ

1.How can I place an order for ISL6263ACRZ-T through Aetrix?

Please submit a Request for Quotation (RFQ) for ISL6263ACRZ-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 ISL6263ACRZ-T reliable?

The price and inventory of ISL6263ACRZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6263ACRZ-T is usually 5 days.

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4.How is shipping managed for ISL6263ACRZ-T?

ISL6263ACRZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ISL6263ACRZ-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 ISL6263ACRZ-T?

For technical support, including ISL6263ACRZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6263ACRZ-T requirements.

6.How does Aetrix verify that ISL6263ACRZ-T is sourced from the original manufacturer or authorized distributors?

All ISL6263ACRZ-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 ISL6263ACRZ-T meets industry standards.

7.What is the process for return or replacement of ISL6263ACRZ-T?

All ISL6263ACRZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL6263ACRZ-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 ISL6263ACRZ-T part is unused and in its original packaging.

Return procedure for ISL6263ACRZ-T:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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