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Renesas ISL6261CRZ
- Part No.:
- ISL6261CRZ
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
ISL6261CRZ.pdf
- Description:
- IC REG CONV INTEL 1OUT 40QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,034
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Product details
Overview
ISL6261CRZ from Intersil is a single-phase buck regulator 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 (0.300V–1.500V), ±0.5% system voltage accuracy over temperature, and diode emulation for light-load efficiency in deeper sleep mode - deployed in laptop VRMs.
For engineers reviewing the ISL6261CRZ datasheet, ISL6261CRZ pinout, ISL6261CRZ application, or ISL6261CRZ equivalent, key selection criteria include IMVP-6® compliance, DCR/resistive current sensing support, thermal monitoring via NTC input, programmable switching frequency (200–500 kHz), and differential remote voltage sensing at the CPU die.
Technical Context
The ISL6261CRZ uses patented R3™ modulator architecture that synthesizes inductor ripple current internally and applies hysteretic comparison against error amplifier output, enabling variable-frequency transient response without sacrificing steady-state accuracy. It supports both lossless DCR sensing (with NTC thermal compensation) and precision resistive sensing for IMVP-6® load-line compliance.
Its control logic interprets DPRSTP#, DPRSLPVR, and FDE signals to select between forced CCM, diode emulation mode (DEM), and enhanced DEM - with 33% increased VW-COMP window in EDEM to reduce switching frequency during deeper sleep. The 7-bit VID interface enables dynamic voltage scaling per Intel's specification table, with on-the-fly VID changes supported.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Regulation Protocol | Intel IMVP-6® compliant; implements precise load line, DPRSTP#/DPRSLPVR timing, and VID decoding per Table 1. |
| Output Voltage Range | 0.300V to 1.500V in 12.5mV steps via 7-bit VID; 0.5% system accuracy over –10°C to +100°C ambient. |
| Switching Frequency | 200–500 kHz, set by external 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/LGATE; 0.5–1.5Ω sink/source resistance; supports MOSFETs up to 25A output. |
| Current Sensing | Dual-mode: lossless inductor DCR sensing (NTC-compensated) or precision resistive sensing; VSUM/DFB/DROOP pins implement droop-based OC protection. |
| Protection Features | Overvoltage (1.7V immediate, +200mV after 1ms), undervoltage (–300mV after 1ms), overcurrent (120µs delay), and overtemperature (NTC <1.18V). |
| Remote Sensing | Unity-gain differential amplifier (VDIFF/VSEN/RTN) enables accurate core voltage regulation at CPU die, rejecting PCB IR drop. |
Pinout & Package
ISL6261CRZ is housed in a 40-lead 6×6 mm QFN package with exposed thermal pad (PKG DWG L40.6x6), rated for –10°C to +100°C ambient operation and RoHS-compliant Pb-free plus anneal finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VID0–VID6 | 7-bit digital voltage identification input | LSB-to-MSB interface for dynamic core voltage setting per IMVP-6® VID table; supports on-the-fly updates. |
| UGATE / LGATE | High-side / low-side MOSFET gate drivers | 2A capable outputs driving external power stage; UGATE referenced to PHASE, LGATE referenced to VSSP. |
| VSEN / RTN | Differential remote sense inputs | Connect directly to CPU VCC/VSS pads to regulate voltage at die, eliminating PCB trace resistance error. |
| DPRSLPVR / DPRSTP# / FDE | IMVP-6® CPU state control inputs | Configure operational mode: CCM, diode emulation, or enhanced diode emulation based on processor sleep state. |
| OCSET / DROOP / DFB / VSUM | Droop-based current sensing network | Enable IMVP-6® load-line compliance and overcurrent protection using either DCR or resistive sensing topology. |
| VR_TT# / NTC | Thermal overload indicator and thermistor input | Open-drain fault flag activated when internal NTC voltage falls below 1.18V; 60µA bias current supplied internally. |
| PGOOD / CLK_EN# | Power-good status and system clock enable | PGOOD asserts ~7ms after startup; CLK_EN# activates 20µs after PGD_IN and Vcore stability for PLL synchronization. |
Key Features
| Feature | Design Value |
|---|---|
| R3™ Robust Ripple Regulator modulator | Delivers faster transient response than fixed-frequency PWM by increasing switching frequency during load steps - no external compensation required. |
| Diode Emulation Mode (DEM) | Automatically disables low-side FET during reverse current flow in light load, reducing conduction loss and enabling automatic DCM entry without control loop instability. |
| Enhanced DEM with FDE pin | Asserting FDE increases VW-COMP window by 33%, further lowering switching frequency in deeper sleep mode to maximize battery runtime. |
| Dual current sensing architecture | Supports both lossless DCR sensing (with NTC thermal compensation) and precision resistive sensing - eliminates need for dedicated current-sense resistors or complex calibration. |
| True differential remote sensing | VDIFF amplifier rejects common-mode noise and PCB IR drop, ensuring ±0.5% regulation accuracy at CPU die across full temperature range. |
Applications
| Mobile CPU Core VRM | Laptop Power Management |
|---|---|
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®-compliant buck controller managing dynamic voltage scaling, load-line droop, and deep-sleep transitions. Use Value: Enables >90% peak efficiency at 25A load and extends battery life via diode emulation in idle/sleep states. | Use Scenario: Integrated VRM solution in compact motherboard designs where board space and thermal density are constrained. IC Role / Device Role / Timing Role: Single-chip regulator with embedded gate drivers, eliminating discrete driver ICs and reducing component count by ≥4. Use Value: Reduces BOM cost and layout complexity while maintaining IMVP-6® timing compliance for VR_ON, DPRSTP#, and CLK_EN# signals. |
| IMVP-6® Reference Design | Thermally Adaptive VRM |
Use Scenario: Reference platform validation for chipset vendors and ODMs developing Intel-compatible mobile platforms. IC Role / Device Role / Timing Role: Fully featured IMVP-6® controller demonstrating VID table compliance, soft-start sequencing, and fault recovery behavior. Use Value: Accelerates design-in with verified startup timing (7ms PGOOD assertion), PGD_IN latching, and VR_ON toggle reset capability. | Use Scenario: High-reliability notebook VRM requiring thermal derating and overtemperature shutdown under sustained CPU load. IC Role / Device Role / Timing Role: Thermal monitor using NTC network on NTC pin, with VR_TT# open-drain output tied to system thermal management logic. Use Value: Prevents CPU thermal runaway by asserting VR_TT# immediately upon NTC voltage falling below 1.18V - no software intervention required. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar core voltage regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6260CRZ | Predecessor IMVP-5® device; lacks DPRSLPVR/FDE support, fixed 300kHz frequency, no enhanced DEM mode. | Not suitable for IMVP-6® deeper sleep requirements; limited to active-mode-only CPU regulation. | Select ISL6261CRZ for IMVP-6® compliance and battery-sensitive designs requiring light-load efficiency optimization. |
| RT8802AGQW | Active-mode-only dual-phase controller; no IMVP-6® protocol engine, no DPRSTP#/DPRSLPVR logic, no VID DAC. | Targeted at non-Intel platforms or custom VRM architectures; requires external VID translation logic. | Choose ISL6261CRZ when Intel mobile CPU compatibility, VID-driven voltage scaling, and IMVP-6®-defined sleep transitions are mandatory. |
Compared with ISL6260CRZ and RT8802AGQW, the ISL6261CRZ uniquely integrates IMVP-6® protocol logic, R3™ transient response, and dual-mode efficiency optimization - making it the only direct fit for Intel Pentium/Core-series mobile CPU VRMs requiring deeper sleep support.
Availability
ISL6261CRZ is available at Aetrix Electronics and suitable for mobile computing, notebook power management, and Intel CPU reference designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL6261CRZ 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) is a fabless semiconductor company specializing in high-performance analog and power management ICs for computing, industrial, and communications markets.
The ISL6261CRZ belongs to Intersil's IMVP-6®-compliant core regulator product line, engineered specifically to meet Intel's mobile CPU voltage positioning, transient response, and energy-efficiency requirements in space-constrained laptop VRMs.
FAQ
What is the operating temperature range for the ISL6261CRZ?
The ISL6261CRZ is specified for an ambient operating temperature range of –10°C to +100°C, with junction temperature limits up to +125°C. Its thermal design leverages the exposed GND pad in the 6×6 mm QFN package and supports reliable operation in thermally dense laptop VRM layouts when paired with appropriate PCB copper area and airflow.
Does the ISL6261CRZ support both DCR and resistive current sensing?
Yes, the ISL6261CRZ supports both lossless inductor DCR current sensing - with built-in NTC thermistor compensation via the NTC pin - and precision resistive current sensing using an external sense resistor. The VSUM, DFB, DROOP, and OCSET pins form a configurable droop-amplifier network that maintains IMVP-6® load-line accuracy under either method.
How does the R3™ modulator in the ISL6261CRZ improve transient response?
The R3™ modulator in the ISL6261CRZ synthesizes inductor ripple current internally and compares it against the error amplifier output using hysteretic logic. During load transients, this architecture increases switching frequency dynamically - delivering energy faster than fixed-frequency PWM - while retaining 0.5% voltage accuracy and eliminating need for external loop compensation components.
What happens when the PGD_IN signal goes low during operation of the ISL6261CRZ?
When PGD_IN goes low, the ISL6261CRZ latches off its PWM outputs and pulls PGOOD low. Toggling PGD_IN will not clear the latch; only toggling VR_ON (or cycling VDD) resets the controller. This behavior ensures immediate shutdown in response to MCH_PWRGD failure, preventing unregulated core voltage conditions during system-level power faults.
Can the ISL6261CRZ be used in systems requiring deeper sleep mode support?
Yes, the ISL6261CRZ explicitly supports deeper sleep mode via DPRSLPVR and FDE pins. When DPRSLPVR = HIGH and DPRSTP# = LOW, it enters diode emulation mode; asserting FDE enables enhanced DEM with 33% wider VW-COMP window, reducing switching frequency and boosting light-load efficiency - critical for Intel mobile CPU battery life extension.
ISL6261CRZ 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:
- -10°C ~ 100°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-QFN (6x6)
ISL6261CRZ FAQ
1.How can I place an order for ISL6261CRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6261CRZ 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 ISL6261CRZ reliable?
The price and inventory of ISL6261CRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6261CRZ is usually 5 days.
3.What payment methods are accepted for ISL6261CRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6261CRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6261CRZ?
ISL6261CRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6261CRZ 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 ISL6261CRZ?
For technical support, including ISL6261CRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6261CRZ requirements.
6.How does Aetrix verify that ISL6261CRZ is sourced from the original manufacturer or authorized distributors?
All ISL6261CRZ 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 ISL6261CRZ meets industry standards.
7.What is the process for return or replacement of ISL6261CRZ?
All ISL6261CRZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL6261CRZ, 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 ISL6261CRZ part is unused and in its original packaging.
Return procedure for ISL6261CRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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