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Renesas ISL6261IRZ-T
- Part No.:
- ISL6261IRZ-T
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
ISL6261IRZ-T.pdf
- Description:
- IC REG CONV INTEL 1OUT 40QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,699
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Product details
Overview
ISL6261IRZ-T 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 deeper sleep states.
For engineers reviewing the ISL6261IRZ-T datasheet, ISL6261IRZ-T pinout, ISL6261IRZ-T application, or ISL6261IRZ-T equivalent, this page delivers verified technical context on IMVP-6® compliance, DCR/resistive current sensing support, thermal monitoring via NTC, differential remote sensing at CPU die, and operational mode control via DPRSTP#, DPRSLPVR, and FDE pins.
Technical Context
The ISL6261IRZ-T 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 lossless DCR and precision resistive current sensing, with thermally compensated NTC network for DCR-based load-line accuracy.
Its IMVP-6® compliance includes dynamic VID decoding (7-bit, 12.5mV steps), differential remote sensing (VDIFF, VSEN/RTN), droop-based load-line implementation, and multi-mode operation: forced CCM (heavy load), diode emulation (DPRSTP# = 0, DPRSLPVR = 1), and enhanced diode emulation (FDE = 1) with 33% increased VW-COMP window to further reduce light-load switching frequency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Regulation Protocol | Intel® IMVP-6® compliant-fully implements VID decoding, load-line droop, DPRSTP#/DPRSLPVR/FDE control, and power-good sequencing per specification. |
| Output Voltage Range | 0.300V to 1.500V in 12.5mV steps via 7-bit VID input-covers full Pentium M/Core Solo/Core Duo core voltage range with on-the-fly adjustment. |
| System Accuracy | ±0.5% over –40°C to +100°C ambient-guaranteed across 0.75–1.5V VID range; ±8mV/±15mV tolerance at lower VID bins ensures stable low-voltage operation. |
| Switching Frequency | 200–500kHz user-programmable via resistor on VW pin-supports optimization for efficiency (lower fSW) or transient response (higher fSW) without changing layout. |
| Gate Drive Capability | 2A sink/source per UGATE/LGATE with <1.5Ω source/sink resistance-drives high-side and low-side MOSFETs directly, eliminating need for external drivers in ≤25A designs. |
| Current Sensing | Supports dual schemes: lossless inductor DCR sensing (with NTC thermal compensation) or precision resistive sensing-enables accurate load-line tracking and overcurrent protection independent of sense resistor power loss. |
| Protection Features | Integrated OV (200mV/1.7V thresholds), UV (–300mV), OC (120µs delay), way-OC (<2µs), OT (NTC-based), and PGOOD latching-ensures robust CPU power integrity under fault conditions. |
Pinout & Package
ISL6261IRZ-T is housed in a 40-lead 6×6 mm QFN package (L40.6x6) with exposed thermal pad. Pin functions are validated per FN9251 Rev 1.00 datasheet, Page 6–7.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VID0–VID6 | 7-bit digital voltage identification input | LSB-to-MSB interface to CPU; sets core output voltage per IMVP-6® VID table with on-the-fly update capability. |
| UGATE / LGATE | High-side / low-side MOSFET gate drive outputs | 2A capable drivers with fast propagation delays (tPDHU = 20–44ns, tPDHL = 7–30ns); eliminate external driver stage in compact mobile VRMs. |
| VSEN / RTN | Differential remote sense inputs | Connect directly to CPU die power pads; enable true die-level voltage regulation by compensating PCB IR drop. |
| DPRSTP# / DPRSLPVR / FDE | IMVP-6® mode control inputs | Configure operational state: forced CCM, diode emulation, or enhanced diode emulation-directly tied to CPU sleep/wake signals. |
| OCSET / DROOP / DFB / VSUM | Current-sensing and droop amplifier network | Enable precise load-line implementation and overcurrent detection using either DCR or resistive sensing topology. |
| VR_TT# / NTC | Thermal overload indicator and thermistor input | Open-drain fault flag (RTT = 5–9Ω) triggered when NTC voltage falls below 1.17–1.25V-provides CPU-adjacent thermal shutdown. |
| PGOOD / CLK_EN# | Power-good status and system clock enable | PGOOD asserts after 7ms startup; CLK_EN# activates 20µs after PGD_IN and Vcore stabilization-synchronizes platform power sequencing. |
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-reducing output voltage deviation in mobile CPU burst-load scenarios. |
| Diode emulation & enhanced diode emulation modes | Enables automatic DCM at light load; FDE activation increases VW-COMP window by 33%, further lowering fSW and boosting efficiency in deeper sleep mode without sacrificing recovery speed. |
| Differential remote voltage sensing (VDIFF) | Compensates for PCB trace resistance between VRM and CPU die-ensures ±0.5% regulation accuracy at the actual processor power rail, not just at VRM output. |
| DCR current sensing with NTC compensation | Eliminates discrete current-sense resistor; NTC network offsets copper winding resistance drift over temperature-maintains IMVP-6® load-line accuracy across –40°C to +100°C ambient. |
| Integrated 2A gate drivers | Drives high- and low-side MOSFETs directly-reduces BOM count, layout area, and gate-drive loop inductance critical for noise-sensitive mobile platforms. |
Applications
| Mobile CPU Core Power Supply | Intel Pentium M / Core Solo Platform VRM |
|---|---|
Use Scenario: Providing regulated core voltage to Intel Pentium M and early Core Solo processors in ultraportable notebooks and tablet PCs. IC Role / Device Role / Timing Role: Single-phase IMVP-6® buck controller with integrated gate drivers, VID decoding, and thermal monitoring-serves as primary CPU core regulator. Use Value: Enables 25A output with ±0.5% die-level accuracy, seamless transition between active/deeper sleep modes, and reduced component count versus multi-chip solutions. | Use Scenario: Implementing compact, high-efficiency VRM on motherboard designs targeting Intel's Mobile Platform Design Guide (MPDG) v3.0 compliance. IC Role / Device Role / Timing Role: IMVP-6®-compliant voltage regulator delivering dynamic VID-adjusted core voltage with differential remote sensing and programmable soft-start slew rate. Use Value: Meets Intel's strict load-line, transient, and sequencing requirements while supporting both DCR and resistive current sensing for design flexibility. |
| Embedded Mobile System-on-Module (SoM) | Low-Power Industrial CPU Power Management |
Use Scenario: Powering ARM-compatible or x86-compatible SoMs in fanless edge computing devices requiring high integration and thermal resilience. IC Role / Device Role / Timing Role: Core voltage regulator with NTC-based thermal monitoring and open-drain VR_TT# fault signaling-interfaces directly with SoM thermal management firmware. Use Value: Delivers reliable operation across –40°C to +100°C ambient; VR_TT# provides immediate thermal event notification without external logic. | Use Scenario: Regulating core voltage for industrial-grade CPUs in ruggedized HMIs, programmable logic controllers, and transportation control units. IC Role / Device Role / Timing Role: Single-phase buck controller supporting wide VIN (5–21V), robust overvoltage/undervoltage protection, and latch-off behavior on PGD_IN fault. Use Value: Ensures deterministic power sequencing and fault containment in mission-critical systems where uncontrolled reset or brownout must be avoided. |
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-T | Lacks FDE pin and enhanced diode emulation mode; identical pinout, VID range, and R3™ modulator-but no 33% VW-COMP window boost for deeper sleep efficiency. | Suitable for legacy IMVP-6® designs without deeper sleep optimization; cannot match ISL6261IRZ-T's light-load efficiency in DPRSLPVR-active states. | Select ISL6260IRZ-T only if FDE functionality is unused and cost reduction is prioritized over deepest-sleep efficiency. |
| RT8802AGQW | Single-phase IMVP-6® controller with integrated drivers; supports same VID range and DCR sensing but uses different modulator (adaptive on-time) and lacks NTC compensation circuitry. | Requires external thermal compensation for DCR sensing; offers comparable transient response but less accurate load-line tracking over temperature without NTC network. | Choose RT8802AGQW for designs already using Richtek ecosystem or where adaptive on-time control is preferred-but verify load-line drift across temperature. |
Compared with ISL6260IRZ-T and RT8802AGQW, the ISL6261IRZ-T uniquely combines R3™ modulator speed, FDE-enabled enhanced diode emulation, and factory-compensated NTC interface-making it optimal for thermally constrained, battery-sensitive mobile platforms requiring guaranteed IMVP-6® compliance and minimal light-load power loss.
Availability
ISL6261IRZ-T is available at Aetrix Electronics and suitable for mobile CPU core power supplies, Intel Pentium M/Core Solo platform VRMs, and embedded SoM power management requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for ISL6261IRZ-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 product support, documentation, and qualification for legacy Intersil power management ICs including the ISL6261 family.
The ISL6261 belongs to Intersil's mobile CPU voltage regulator product line, designed specifically to meet Intel IMVP-6® specification requirements for notebook and ultramobile platforms with emphasis on transient response, light-load efficiency, and die-level voltage accuracy.
FAQ
What is the operating temperature range of the ISL6261IRZ-T?
The ISL6261IRZ-T is rated for operation from –40°C to +100°C ambient temperature, with junction temperature limited to +125°C. This extended range supports deployment in thermally demanding mobile and industrial environments where CPU core regulators experience significant self-heating and ambient variation.
Does the ISL6261IRZ-T support both DCR and resistive current sensing?
Yes, the ISL6261IRZ-T supports both lossless inductor DCR current sensing-with integrated NTC thermistor compensation-and precision resistive current sensing. The DROOP, VSUM, DFB, and OCSET pins form a configurable network enabling accurate load-line implementation and overcurrent protection in either configuration.
How does the FDE pin affect ISL6261IRZ-T operation in deeper sleep mode?
The FDE pin enables Enhanced Diode Emulation Mode when asserted high with DPRSTP# low. This increases the VW-COMP voltage window by 33%, reducing switching frequency at light load and improving regulator efficiency during Intel deeper sleep states-without compromising wake-up transient response.
What is the purpose of the VR_TT# pin on the ISL6261IRZ-T?
The VR_TT# pin is an open-drain thermal overload indicator that pulls low when the internal NTC comparator detects die temperature exceeding threshold (VNTC < 1.17–1.25V). It provides immediate, latch-free thermal fault signaling to system logic-distinct from PGOOD latching behavior-and requires no external pull-up for basic monitoring.
Can the ISL6261IRZ-T be used in new designs despite its 2006 datasheet revision?
Yes, the ISL6261IRZ-T remains actively supported by Renesas with full documentation, recommended replacements, and long-term availability commitments. Its IMVP-6® compliance, proven reliability in shipping platforms, and continued distribution through authorized channels make it viable for new industrial and embedded designs requiring qualified, stable components.
ISL6261IRZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- Robust Ripple Regulator™ (R3)
- Package/Case:
- 40-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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-T FAQ
1.How can I place an order for ISL6261IRZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6261IRZ-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 ISL6261IRZ-T reliable?
The price and inventory of ISL6261IRZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6261IRZ-T is usually 5 days.
3.What payment methods are accepted for ISL6261IRZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6261IRZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6261IRZ-T?
ISL6261IRZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6261IRZ-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 ISL6261IRZ-T?
For technical support, including ISL6261IRZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6261IRZ-T requirements.
6.How does Aetrix verify that ISL6261IRZ-T is sourced from the original manufacturer or authorized distributors?
All ISL6261IRZ-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 ISL6261IRZ-T meets industry standards.
7.What is the process for return or replacement of ISL6261IRZ-T?
All ISL6261IRZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL6261IRZ-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 ISL6261IRZ-T part is unused and in its original packaging.
Return procedure for ISL6261IRZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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