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Renesas ISL6261IRZ
- Part No.:
- ISL6261IRZ
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
ISL6261IRZ.pdf
- Description:
- IC REG CONV INTEL 1OUT 40QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,137
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Product details
Overview
ISL6261IRZ from Renesas (formerly Intersil) is a single-phase buck regulator IC implementing Intel® IMVP-6® protocol for mobile CPU core voltage regulation, featuring integrated 2A gate drivers, R3™ Robust Ripple Regulator modulator, 7-bit VID DAC (0.300–1.500V), ±0.5% system voltage accuracy over temperature, and diode emulation mode for light-load efficiency in laptop power delivery systems.
For engineers reviewing the ISL6261IRZ datasheet, ISL6261IRZ pinout, ISL6261IRZ application, or ISL6261IRZ equivalent, this page delivers verified technical context, confirmed pin functions, real-world IMVP-6® operational modes, differential remote sensing implementation, and validated alternative parts for mobile VR design and replacement sourcing.
Technical Context
The ISL6261IRZ uses patented R3™ modulator architecture that synthesizes inductor ripple current internally and applies hysteretic comparison against error amplifier output-enabling variable switching frequency during transients for faster load-step response than fixed-frequency PWM. It supports both DCR-based and resistive current sensing with NTC thermal compensation for IMVP-6® load-line accuracy.
Its control logic interprets DPRSTP#, DPRSLPVR, and FDE signals to select among forced CCM, diode emulation mode (DEM), and enhanced DEM-each altering VW-COMP window voltage and switching behavior. The 7-bit VID interface enables dynamic voltage scaling per Intel's IMVP-6® specification table, with on-the-fly VID changes supported via SOFT capacitor slew-rate control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Regulation Protocol | Intel® IMVP-6® compliant-supports full VID table (0.300–1.500V), DPRSTP#/DPRSLPVR signaling, and load-line droop requirements. |
| Output Voltage Range | 0.300V to 1.500V in 12.5mV steps via 7-bit VID input; 0.5% system accuracy over –40°C to +100°C ambient. |
| Switching Frequency | User-programmable 200–500 kHz via resistor between VW and COMP pins; R3™ modulator increases frequency during load transients. |
| Gate Drive Capability | Integrated high- and low-side drivers: 2A source/sink for UGATE, 4A sink for LGATE; supports MOSFETs up to 25A output current. |
| Current Sensing | Dual-mode support: lossless inductor DCR sensing (with NTC thermal compensation) or precision resistive sensing via VSUM/OCSET/DFB pins. |
| Protection Features | Overvoltage (1.7V immediate latch + 200mV 1ms trip), undervoltage (–300mV), overcurrent (120µs delay), and overtemperature (NTC-based VR_TT# assertion). |
| Remote Sensing | Unity-gain differential amplifier (VDIFF/VSEN/RTN) enables accurate die-level voltage regulation per IMVP-6® spec. |
Pinout & Package
ISL6261IRZ is housed in a 40-lead 6×6 mm QFN package (L40.6x6) with exposed thermal pad. Operating temperature range is –40°C to +100°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VID0–VID6 | 7-bit digital voltage identification input | LSB-to-MSB interface setting core voltage per IMVP-6® table; supports on-the-fly updates. |
| UGATE / LGATE | High-side / low-side MOSFET gate drivers | Drive external N-channel MOSFETs; UGATE rated for 2A source/sink, LGATE for 4A sink capability. |
| VSEN / RTN | Differential remote sense inputs | Connect directly to CPU die power/ground pads to compensate PCB IR drop and ensure die-level regulation accuracy. |
| DPRSLPVR / DPRSTP# / FDE | IMVP-6® sleep-mode control inputs | Configure operational mode: CCM, diode emulation, or enhanced diode emulation (33% VW-COMP window increase). |
| COMP / FB / DROOP / DFB | Error amplifier and droop control nodes | COMP = EA output; FB = EA inverting input; DROOP = load-current analog; DFB = droop amplifier inverting input. |
| PGOOD / VR_TT# | Open-drain status outputs | PGOOD indicates regulated output; VR_TT# asserts low on overtemperature (NTC < 1.18V). |
| VIN / VDD / VCCP / BOOT | Power supply terminals | VIN: 5–21V input; VDD: 5V ±5% controller supply; VCCP: 5V gate driver supply; BOOT: bootstrap capacitor node for high-side drive. |
Key Features
| Feature | Design Value |
|---|---|
| R3™ Robust Ripple Regulator modulator | Delivers faster transient response than fixed-frequency PWM by dynamically increasing switching frequency during load steps. |
| Diode emulation & enhanced DEM modes | Enables automatic DCM at light load; FDE assertion increases VW-COMP window by 33%, further reducing fSW and boosting deeper-sleep efficiency. |
| Differential remote voltage sensing | Eliminates PCB trace resistance error-ensures ±0.5% regulation accuracy at CPU die across temperature and load. |
| DCR current sensing with NTC compensation | Maintains IMVP-6® load-line accuracy despite copper winding resistance drift over temperature using internal 60µA NTC bias. |
| Programmable soft-start and slew rate | SOFT capacitor sets startup ramp (2mV/µs) and active-mode VID transition rate (±2mV/µs or ±10mV/µs based on DPRSLPVR). |
| Comprehensive fault protection | Independent OV/UV/OC/OT detection with distinct timing thresholds and reset mechanisms (VR_ON toggle or VDD cycle required). |
Applications
| Mobile CPU Core Power Delivery | Laptop VR Module Design |
|---|---|
Use Scenario: Regulating core voltage for Intel Pentium M and Core Solo/Duo processors in thin-and-light notebooks. IC Role / Device Role / Timing Role: Primary IMVP-6® buck controller managing VID decoding, load-line droop, phase-node switching, and thermal monitoring. Use Value: Enables >90% peak efficiency at 25A load while meeting Intel's ±0.5% die-voltage accuracy and 1ms UV/OV response requirements. |
Use Scenario: Building compact, high-density VRMs on motherboard or daughterboard for OEM laptop platforms. IC Role / Device Role / Timing Role: Single-chip solution integrating gate drivers, error amplification, current sensing, and protection logic-reducing BOM count by ≥4 discrete components. Use Value: Eliminates need for external op-amps, comparators, and discrete gate drivers; supports 6×6 mm layout footprint with thermal pad for 2.5W dissipation. |
| IMVP-6® Compliance Validation | Low-Power Sleep Mode Optimization |
Use Scenario: Reference design validation against Intel IMVP-6® specification for BIOS/firmware development teams. IC Role / Device Role / Timing Role: Hardware reference for DPRSTP#/DPRSLPVR timing, VID slew rates, PGOOD assertion delays, and VR_TT# thermal response. Use Value: Provides documented, datasheet-verified timing margins (e.g., 6.8ms PGOOD delay, 20µs CLK_EN# activation after PGD_IN) for compliance testing. |
Use Scenario: Extending battery life during CPU deeper-sleep states (C4/C5) in ultrabook and 2-in-1 devices. IC Role / Device Role / Timing Role: Dynamically switches to diode emulation mode upon DPRSLPVR assertion, reducing switching losses and enabling sub-100kHz operation. Use Value: Achieves >85% efficiency at 1A load (vs. ~72% in CCM) by eliminating reverse conduction loss and lowering fSW via FDE-enhanced mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar single-phase IMVP-6® core regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6260IRZ | Predecessor in same family; lacks FDE pin and enhanced DEM mode; fixed 300kHz nominal fSW; no VW pin for frequency adjustment. | Supports IMVP-5 only; not certified for IMVP-6® deeper-sleep sequences or DPRSLPVR-driven slew control. | Select ISL6260IRZ only for legacy IMVP-5 designs where enhanced light-load efficiency and programmable frequency are unnecessary. |
| RT8802AGQW | Richtek part with IMVP-6® compliance; includes integrated MOSFET drivers but uses different VID mapping and lacks NTC-compensated DCR sensing. | Requires redesign of current-sense network and thermal compensation circuitry; different SOFT/CLK_EN# timing behavior. | Choose RT8802AGQW when migrating to Richtek ecosystem or requiring higher integration (e.g., built-in MOSFETs in other variants), but expect layout and firmware adaptation. |
Compared with ISL6261IRZ, ISL6260IRZ offers reduced feature set and IMVP-6® non-compliance, while RT8802AGQW requires board-level rework due to divergent sensing architecture and timing-making ISL6261IRZ the optimal choice for drop-in IMVP-6® VRM upgrades and new laptop platform designs.
Availability
ISL6261IRZ is available at Aetrix Electronics and suitable for mobile computing power delivery, notebook VRM modules, and Intel CPU core voltage regulation requiring stable component supply across industrial temperature range (–40°C to +100°C).
Supply support for ISL6261IRZ 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 support for its high-performance analog and power management portfolio, including IMVP-compliant VR controllers.
The ISL6261IRZ belongs to Renesas' mobile CPU power management product line, engineered specifically for Intel IMVP-6®-compliant core voltage regulation in space-constrained, thermally demanding laptop platforms.
FAQ
What is the operating temperature range for the ISL6261IRZ?
The ISL6261IRZ is rated for –40°C to +100°C ambient temperature operation, matching the extended industrial range required for laptop VRMs near CPU heat sources. Its thermal resistance θJA is 33°C/W (6×6 QFN), and maximum junction temperature is +150°C-enabling reliable performance under sustained 25A loads with proper PCB copper pour and thermal vias beneath the exposed pad.
How does the ISL6261IRZ implement IMVP-6® load-line droop?
The ISL6261IRZ implements IMVP-6® load-line droop using its internal droop amplifier: sensed inductor current (via VSUM) drives DROOP output, which is compared against VO at DFB to generate a voltage-proportional-to-current offset. This creates the required VOUT = VVID – ILOAD × Rdroop relationship, with Rdroop set by OCSET resistor value and internal 10µA current source.
Can the ISL6261IRZ be used with resistive current sensing instead of DCR sensing?
Yes, the ISL6261IRZ fully supports resistive current sensing via a series sense resistor (Rsen) placed between PHASE and ground. The voltage across Rsen is fed into VSUM, and the droop amplifier processes it identically to DCR-derived signals-enabling precise load-line control without NTC compensation, though at the cost of added power loss and board area.
What happens when the PGD_IN signal goes low during operation?
When PGD_IN goes low, the ISL6261IRZ latches off immediately-stopping UGATE/LGATE outputs and pulling PGOOD low. This latch cannot be cleared by toggling PGD_IN; only a VR_ON toggle (or full VDD power cycle) resets the converter. This behavior ensures system-level fault isolation if MCH_PWRGD (memory controller power good) fails.
Does the ISL6261IRZ support on-the-fly VID changes during CPU state transitions?
Yes, the ISL6261IRZ supports on-the-fly VID changes synchronized with CPU mode transitions (e.g., active ↔ deeper sleep). The SOFT capacitor controls slew rate: ±2mV/µs when DPRSLPVR = high (slow, quiet transitions) or ±10mV/µs when DPRSLPVR = low (fast recovery), ensuring IMVP-6®-compliant timing without overshoot via adaptive dv/dt moderation near target voltage.
ISL6261IRZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- Robust Ripple Regulator™ (R3)
- Package/Case:
- 40-VFQFN Exposed Pad
- Packaging:
- Tube
- 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 ~ 100°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-QFN (6x6)
ISL6261IRZ FAQ
1.How can I place an order for ISL6261IRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6261IRZ 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 ISL6261IRZ reliable?
The price and inventory of ISL6261IRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6261IRZ is usually 5 days.
3.What payment methods are accepted for ISL6261IRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6261IRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6261IRZ?
ISL6261IRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6261IRZ 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 ISL6261IRZ?
For technical support, including ISL6261IRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6261IRZ requirements.
6.How does Aetrix verify that ISL6261IRZ is sourced from the original manufacturer or authorized distributors?
All ISL6261IRZ 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 ISL6261IRZ meets industry standards.
7.What is the process for return or replacement of ISL6261IRZ?
All ISL6261IRZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL6261IRZ, 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 ISL6261IRZ part is unused and in its original packaging.
Return procedure for ISL6261IRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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