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Renesas ISL6261IR7Z-T
- Part No.:
- ISL6261IR7Z-T
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
ISL6261IR7Z-T.pdf
- Description:
- IC REG CONV INTEL 1OUT 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,328
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Product details
Overview
ISL6261IR7Z-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 in 12.5mV steps), ±0.5% system voltage accuracy over temperature, and diode emulation mode for light-load efficiency optimization in laptop power delivery systems.
For engineers reviewing the ISL6261IR7Z-T datasheet, ISL6261IR7Z-T pinout, ISL6261IR7Z-T application, or ISL6261IR7Z-T equivalent, this page provides verified technical context, validated pin functions, confirmed IMVP-6® compliance, real-world current sensing options (DCR/resistive), and authoritative alternative selection guidance for mobile VR design.
Technical Context
The ISL6261IR7Z-T uses patented R3™ modulator architecture that synthesizes inductor ripple current internally and applies hysteretic comparison to error amplifier output-enabling variable switching frequency during transients for faster load-step response than fixed-frequency PWM. It supports both lossless DCR sensing (with NTC thermal compensation) and precision resistive current sensing.
Its operational modes-forced CCM, diode emulation (DEM), and enhanced DEM-are controlled by DPRSTP#, FDE, and DPRSLPVR logic inputs per Table 2; differential remote sensing (VSEN/RTN) ensures ±0.5% regulation accuracy at the CPU die across –40°C to +100°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage Range | 0.300V to 1.500V via 7-bit VID input (12.5mV steps); supports full IMVP-6® VID table including 0.300V minimum and 1.500V maximum. |
| System Voltage Accuracy | ±0.5% over temperature (0°C to +100°C) for VID = 0.75–1.5V; enables precise core voltage positioning required by Intel mobile CPUs. |
| Switching Frequency | Programmable 200–500 kHz via resistor on VW pin; nominal 333 kHz at RFSET = 7kΩ; variable during transients for improved dynamic response. |
| Gate Drive Capability | 2A source/sink per gate driver (UGATE/LGATE); 1Ω typical sink resistance on LGATE enabling robust low-side FET control in high-current applications. |
| Current Sensing | Supports dual schemes: lossless DCR sensing with NTC thermal compensation, or precision resistive sensing; DROOP pin provides high-bandwidth analog current representation. |
| Protection Features | Overvoltage (1.7V immediate latch + 200mV/1ms trip), undervoltage (–300mV/1ms), overcurrent (120µs delay), and overtemperature (NTC < 1.18V) with dedicated open-drain outputs (PGOOD, VR_TT#). |
| Thermal Performance | θJA = 30°C/W (7×7 QFN); max junction temperature = +150°C; RoHS-compliant Pb-free plus anneal package. |
Pinout & Package
ISL6261IR7Z-T is housed in a 48-lead 7×7 mm QFN package (L48.7x7) with exposed thermal pad. Pin functions are validated per FN9251 Rev 1.00 datasheet Figures 1–2 and Pin Descriptions (pp. 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; supports on-the-fly changes during operation. |
| UGATE / LGATE | Upper/lower MOSFET gate drive outputs | Integrated 2A drivers directly control external power stage; UGATE referenced to PHASE, LGATE referenced to VSSP. |
| VSEN / RTN | Differential remote sense inputs | Connects to CPU die sense points; enables true die-level regulation accuracy by rejecting PCB IR drop. |
| DPRSLPVR / DPRSTP# / FDE | IMVP-6® sleep-mode control inputs | Configure operational mode: DPRSLPVR=1 + DPRSTP#=0 → diode emulation; FDE=1 → enhanced diode emulation (33% wider VW-COMP window). |
| OCSET / DROOP / DFB / VSUM | Current-sensing and droop amplifier network | OCSET sets overcurrent threshold via 10µA current source; DROOP provides high-bandwidth current signal; DFB and VSUM complete IMVP-6® load-line implementation. |
| PGOOD / VR_TT# | Open-drain status outputs | PGOOD indicates valid output regulation (5.5–8.1ms delay); VR_TT# asserts on overtemperature (NTC < 1.18V) with 5–9Ω pull-down resistance. |
Key Features
| Feature | Design Value |
|---|---|
| R3™ Robust Ripple Regulator modulator | Variable-frequency hysteretic control with error amplifier feedback-delivers faster transient response than fixed-frequency PWM while maintaining ±0.5% DC accuracy. |
| Diode Emulation Mode (DEM) | Automatic transition to discontinuous conduction mode at light load; eliminates reverse conduction loss in lower FET, increasing efficiency in deeper sleep states. |
| Enhanced DEM with FDE pin | FDE assertion increases VW-COMP voltage window by 33%, further reducing switching frequency and boosting light-load efficiency beyond standard DEM. |
| Dual current sensing architecture | Hardware-selectable DCR or resistive sensing; DCR option includes internal NTC thermistor bias (60µA) and gain/TC compensation for stable load-line accuracy over temperature. |
| IMVP-6®-compliant timing and protection | Validated startup sequence (7ms PGOOD assert), DPRSTP#/DPRSLPVR logic alignment, and fault responses matching Intel specification-including way-overcurrent (<2µs) detection and latched shutdown. |
Applications
| Mobile CPU Core Power Supply | Laptop VRM Module |
|---|---|
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: Single-phase IMVP-6® buck controller with integrated gate drivers, remote sensing, and sleep-mode sequencing. Use Value: Enables >25A output with ±0.5% die-level accuracy, 10mV/µs active-mode slew rate, and 2mV/µs deeper-sleep ramp to minimize audible noise and maximize battery life. |
Use Scenario: Compact, high-efficiency VRM solution on motherboard or daughterboard for mobile platform designs. IC Role / Device Role / Timing Role: Primary voltage regulator IC managing power stage, current sensing, thermal monitoring, and system-level signaling (CLK_EN#, PGOOD). Use Value: Reduces BOM count via integrated drivers and differential sensing; supports both DCR and resistive sensing for flexibility in cost/performance trade-offs. |
| Intel Mobile Platform Reference Design | Embedded Mobile Computing System |
Use Scenario: Implementation in Intel reference schematics for Centrino-based platforms requiring strict IMVP-6® compliance. IC Role / Device Role / Timing Role: Certified IMVP-6® controller meeting all timing, VID, and protection requirements specified in Intel documentation. Use Value: Guarantees interoperability with Intel chipset power-good signals (PGD_IN), clock enable (CLK_EN#), and thermal alerts (VR_TT#). |
Use Scenario: Power management in ruggedized tablets or fanless embedded systems operating from –40°C to +100°C ambient. IC Role / Device Role / Timing Role: High-reliability core regulator with overtemperature latch (VR_TT#), wide-input VIN (5–21V), and robust ESD rating (>3kV HBM). Use Value: Maintains ±0.5% regulation across industrial temperature range; thermal monitor output drives system-level throttling or shutdown. |
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 |
|---|---|---|---|
| ISL6260IR7Z-T | Same 48-pin QFN package and R3™ architecture, but lacks FDE pin and enhanced DEM capability; fixed 300kHz nominal frequency. | Supports basic IMVP-6® DEM but not enhanced DEM; unsuitable where deeper-sleep efficiency gains >5% are required. | Select ISL6261IR7Z-T when FDE-controlled enhanced diode emulation is needed for optimal light-load efficiency in deeper sleep mode. |
| RT8802AGQW | Single-phase IMVP-6® controller in 40-pin QFN; no integrated gate drivers-requires external high/low-side drivers; supports 0.3–1.5V VID range. | Higher external component count; lacks integrated 2A drivers and differential remote sensing circuitry of ISL6261IR7Z-T. | Choose ISL6261IR7Z-T for reduced layout complexity, smaller footprint, and guaranteed die-level accuracy without external amplifier components. |
Compared with ISL6260IR7Z-T and RT8802AGQW, the ISL6261IR7Z-T uniquely combines integrated 2A gate drivers, FDE-enabled enhanced diode emulation, and differential remote sensing in a single 48-pin QFN-delivering higher integration, superior light-load efficiency, and tighter die-voltage regulation for demanding mobile CPU applications.
Availability
ISL6261IR7Z-T is available at Aetrix Electronics and suitable for mobile CPU core power supplies, laptop VRM modules, and Intel Centrino platform designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL6261IR7Z-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) is a global semiconductor leader specializing in microcontrollers, analog power management, and timing solutions for automotive, industrial, and computing markets.
The ISL6261IR7Z-T belongs to Renesas' legacy Intersil IMVP-6® regulator product line, engineered specifically for high-efficiency, tightly regulated core voltage delivery in Intel mobile processor platforms with emphasis on transient response, thermal resilience, and sleep-mode optimization.
FAQ
What is the operating temperature range for the ISL6261IR7Z-T?
The ISL6261IR7Z-T is rated for –40°C to +100°C ambient operating temperature, with a maximum junction temperature of +150°C. Its thermal resistance θJA is 30°C/W in the 7×7 mm QFN package, enabling reliable operation in thermally constrained laptop and embedded mobile environments. The device also features an integrated thermal monitor (VR_TT#) that asserts on NTC voltage falling below 1.18V.
Does the ISL6261IR7Z-T support both DCR and resistive current sensing?
Yes, the ISL6261IR7Z-T fully supports both inductor DCR current sensing-with built-in NTC thermistor bias (60µA) and automatic gain/TC compensation-and precision resistive current sensing using an external sense resistor. The DROOP, VSUM, DFB, and OCSET pins form a complete hardware-configurable current-sensing network validated per Figures 2 and 3 of the FN9251 datasheet.
How does the FDE pin affect ISL6261IR7Z-T operation?
The FDE (Forced Diode Emulation Enable) pin, when asserted high with DPRSTP# low, activates Enhanced Diode Emulation Mode-increasing the VW-COMP voltage window by 33% to further reduce switching frequency at light load. This extends battery life in deeper sleep mode beyond standard diode emulation, as confirmed in Table 2 and Section "High Efficiency Operation Mode" of FN9251.
What is the purpose of the SOFT pin on the ISL6261IR7Z-T?
SOFT is the non-inverting input of the error amplifier and sets output voltage slew rate via an external capacitor to GND. With a 20nF capacitor, ISL6261IR7Z-T achieves 2mV/µs slew during deeper sleep (DPRSLPVR = 1) and 10mV/µs during active mode (DPRSLPVR = 0), preventing overshoot and minimizing audible noise-per Figure 4 and "Dynamic Operation" section of FN9251.
Is the ISL6261IR7Z-T pin-compatible with other ISL626x variants?
No-the ISL6261IR7Z-T uses a 48-pin 7×7 mm QFN package (L48.7x7), while ISL6261CRZ/IRZ variants use 40-pin 6×6 mm QFN (L40.6x6). Pin counts, layouts, and thermal pad dimensions differ; direct PCB replacement is not possible without layout revision. Always verify package drawing L48.7x7 before design-in.
ISL6261IR7Z-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- Robust Ripple Regulator™ (R3)
- Package/Case:
- 48-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:
- 48-QFN (7x7)
ISL6261IR7Z-T FAQ
1.How can I place an order for ISL6261IR7Z-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6261IR7Z-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 ISL6261IR7Z-T reliable?
The price and inventory of ISL6261IR7Z-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6261IR7Z-T is usually 5 days.
3.What payment methods are accepted for ISL6261IR7Z-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6261IR7Z-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6261IR7Z-T?
ISL6261IR7Z-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6261IR7Z-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 ISL6261IR7Z-T?
For technical support, including ISL6261IR7Z-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6261IR7Z-T requirements.
6.How does Aetrix verify that ISL6261IR7Z-T is sourced from the original manufacturer or authorized distributors?
All ISL6261IR7Z-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 ISL6261IR7Z-T meets industry standards.
7.What is the process for return or replacement of ISL6261IR7Z-T?
All ISL6261IR7Z-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL6261IR7Z-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 ISL6261IR7Z-T part is unused and in its original packaging.
Return procedure for ISL6261IR7Z-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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