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Renesas ISL6261IR7Z
- Part No.:
- ISL6261IR7Z
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
ISL6261IR7Z.pdf
- Description:
- IC REG CONV INTEL 1OUT 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,502
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Product details
Overview
ISL6261IR7Z 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, 7-bit VID DAC (0.300–1.500V in 12.5mV steps), ±0.5% system voltage accuracy over temperature, and R3™ Robust Ripple Regulator modulator for fast transient response in laptop power delivery systems.
For engineers reviewing the ISL6261IR7Z datasheet, ISL6261IR7Z pinout, ISL6261IR7Z application, or ISL6261IR7Z equivalent, this page delivers verified technical context on IMVP-6® compliance, diode emulation mode operation, DCR/resistive current sensing support, thermal monitoring via NTC input, and differential remote voltage sensing at the CPU die - all critical for notebook VR design validation and BOM optimization.
Technical Context
The ISL6261IR7Z implements Intel IMVP-6® load-line regulation using a true unity-gain differential amplifier for remote VSEN/RTN sensing and a dedicated droop amplifier (DROOP–VO) generating high-bandwidth current representation. It supports dual current-sensing methods: lossless inductor DCR sensing with NTC-based thermal compensation, or precision resistive sensing via SOFT/VSUM/OCSET pins.
Its patented R3™ modulator synthesizes ripple current analogs internally, enabling variable-frequency PWM during transients for faster response than fixed-frequency controllers. Operational modes - forced CCM, diode emulation (DEM), and enhanced DEM - are controlled by DPRSTP#, FDE, and DPRSLPVR logic inputs per Table 2, with automatic switching between continuous and discontinuous conduction based on load and sleep state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Regulation Protocol | Intel IMVP-6® compliant; implements dynamic load line, VID decoding, and deeper sleep signaling (DPRSLPVR/DPRSTP#) |
| Output Voltage Range | 0.300V to 1.500V via 7-bit VID input (12.5mV steps); 0.5% system accuracy over –40°C to +100°C ambient |
| Switching Frequency | User-programmable 200–500 kHz via resistor on VW pin; R3™ modulator increases frequency during load transients for faster recovery |
| Gate Drive Capability | Integrated high-side and low-side drivers: 2A source/sink (UGATE/LGATE), 1Ω typical sink resistance (LGATE), 1.1kΩ UGATE-to-PHASE resistance |
| Current Sensing | Supports both lossless DCR sensing (with NTC thermal compensation network) and precision resistive sensing; OCSET pin accepts 10µA reference current |
| Protection Features | Overvoltage (1.7V immediate latch, +200mV after 1ms), undervoltage (–300mV after 1ms), overcurrent (120µs delay), and overtemperature (NTC <1.18V) |
| Thermal Rating | –40°C to +100°C operating ambient; 150°C max junction temperature; θJA = 30°C/W (7x7 QFN package) |
Pinout & Package
ISL6261IR7Z is housed in a 48-lead, 7mm × 7mm, 0.5mm pitch QFN package (PKG DWG L48.7x7) with exposed thermal pad. Pin functions are validated per FN9251 Rev 1.00 datasheet Figures 1–2 and Page 6 functional descriptions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power stage input | Accepts 5V–21V battery input; enables input voltage feed-forward for improved line transient rejection |
| UGATE / LGATE | High-side / low-side MOSFET gate drivers | Drive external N-channel FETs; UGATE sourced from BOOT, LGATE referenced to VSSP; 2A peak drive capability |
| PHASE | Switch node | Connects to source of upper FET and drain of lower FET; critical for accurate DCR sensing and bootstrap charging |
| VSEN / RTN | Differential remote sense inputs | Direct connection to CPU die power/ground pads; enables ±0.5% regulation accuracy at point-of-load |
| VID0–VID6 | 7-bit voltage identification bus | LSB-to-MSB digital interface (VID0 = LSB); supports on-the-fly VID changes per IMVP-6® specification |
| DPRSLPVR / DPRSTP# / FDE | IMVP-6® sleep control inputs | Configure operational mode: CCM, diode emulation, or enhanced diode emulation (33% wider VW-COMP window) |
| OCSET / DROOP / VSUM | Overcurrent and droop amplifier interface | Set OC threshold via resistor to VO; DROOP–VO provides real-time current signal; VSUM is non-inverting input to droop amp |
| VR_TT# / NTC | Thermal overload indicator | Open-drain output pulled low when NTC voltage drops below 1.18V; internal 60µA current source on NTC pin |
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 Mode (DEM) | Enables automatic DCM at light load by turning off LGATE when inductor current reverses, eliminating reverse conduction loss |
| Enhanced DEM with FDE pin | Asserting FDE increases VW-COMP voltage window by 33%, further reducing switching frequency and boosting efficiency in deeper sleep |
| Dual current sensing architecture | Supports either DCR sensing (with NTC thermistor compensation) or precision shunt resistor sensing - no hardware redesign needed |
| True differential remote sensing | VSEN/RTN inputs connect directly to CPU die, compensating PCB IR drop and ensuring ±0.5% regulation accuracy at the processor |
Applications
| Mobile CPU Core Power Supply | Laptop VR12/IMVP-6® Platform |
|---|---|
Use Scenario: Primary core voltage regulator for Intel Pentium M and Core Solo/Duo processors in thin-and-light notebooks. IC Role / Device Role / Timing Role: Single-phase buck controller executing IMVP-6® protocol, managing VID updates, load-line droop, and deep-sleep transitions. Use Value: Enables >90% efficiency at 15A load and >85% at 1A via DEM/EDEM modes; differential sensing maintains 0.5% accuracy despite 50mΩ PCB trace resistance. | Use Scenario: Reference design component in OEM motherboard VRMs meeting Intel's IMVP-6® compliance requirements. IC Role / Device Role / Timing Role: System-level voltage regulator controlling CPU VCCP rail, synchronized with MCH_PWRGD (PGD_IN) and CLK_EN# timing signals. Use Value: Reduces component count via integrated gate drivers and eliminates need for external error amp or current-sense amplifiers. |
| Thermally Constrained Ultrabook Designs | Low-Noise Mobile Computing Systems |
Use Scenario: Core regulator in fanless or thermally limited ultrabooks where junction temperature must stay below 125°C under sustained load. IC Role / Device Role / Timing Role: Thermal monitor via NTC input triggers VR_TT# shutdown before CPU throttling; θJA = 30°C/W enables compact heatsinking. Use Value: Prevents thermal runaway without external sensors; NTC compensation maintains load-line accuracy across –40°C to +85°C ambient. | Use Scenario: Power solution for quiet mobile workstations where audible coil whine must be suppressed during sleep/wake transitions. IC Role / Device Role / Timing Role: Controls slew rate via SOFT capacitor and DPRSLPVR logic: ±2mV/µs during deeper sleep entry/exit. Use Value: Eliminates high-frequency switching noise during low-load states while maintaining IMVP-6® compliance and fast wake-up (<7ms PGOOD assertion). |
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 | Same 48-lead QFN package and pinout; lacks DPRSLPVR support and deeper sleep features; no FDE pin or enhanced DEM mode | Not suitable for platforms requiring IMVP-6® deeper sleep compliance; limited to active-mode-only operation | Select only if legacy IMVP-5 or simplified sleep behavior is acceptable and cost reduction is prioritized over efficiency in low-power states |
| RT8802AGQW | 40-pin QFN; supports IMVP-6® but uses different VID mapping and lacks NTC-based DCR thermal compensation circuitry | Requires redesign of current-sense network and thermal monitoring path; not drop-in for ISL6261IR7Z layouts | Consider only for new designs where Renesas supply continuity is constrained and full DCR compensation is not required |
Compared with ISL6261IR7Z, ISL6260IR7Z omits deeper sleep control and thermal compensation, limiting low-load efficiency and IMVP-6® compliance; RT8802AGQW offers IMVP-6® support but requires layout changes due to differing pin functions and missing NTC integration, making ISL6261IR7Z the optimal choice for thermally optimized, fully compliant mobile CPU VRMs.
Availability
ISL6261IR7Z is available at Aetrix Electronics and suitable for mobile computing, ultrabook platform development, and Intel IMVP-6®-compliant CPU power delivery requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL6261IR7Z 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 manufacturing continuity for the ISL6261 family.
The ISL6261 product line was designed specifically for Intel mobile CPU core voltage regulation, delivering IMVP-6® protocol compliance, high-efficiency diode emulation, and integrated gate drivers to reduce solution size and cost in space-constrained notebook platforms.
FAQ
What is the operating temperature range for the ISL6261IR7Z?
The ISL6261IR7Z is rated for –40°C to +100°C ambient operating temperature, with a maximum junction temperature of +150°C. Its thermal resistance is θJA = 30°C/W in the 7x7 QFN package, enabling reliable operation in thermally dense laptop VRM layouts. The device includes an NTC-based thermal monitor (VR_TT#) that asserts immediately when the NTC voltage falls below 1.18V, corresponding to overtemperature conditions at the CPU die.
Does the ISL6261IR7Z support both DCR and resistive current sensing?
Yes, the ISL6261IR7Z supports both lossless inductor DCR current sensing and precision resistive current sensing. For DCR sensing, it uses the VSUM, DROOP, and OCSET pins with an external NTC thermistor network to compensate for copper winding resistance drift. For resistive sensing, a shunt resistor is placed in series with the inductor, and the same pins interface the resulting voltage signal. Both methods are validated in Figures 2 and 3 of the FN9251 datasheet.
How does the ISL6261IR7Z achieve IMVP-6® deeper sleep compliance?
The ISL6261IR7Z achieves IMVP-6® deeper sleep compliance through three dedicated control inputs: DPRSLPVR (logic-high indicates deeper sleep), DPRSTP# (logic-low indicates deeper sleep), and FDE (enables enhanced diode emulation). When DPRSTP# = 0 and FDE = 1, the device enters Enhanced DEM mode, widening the VW-COMP voltage window by 33% to further reduce switching frequency and maximize light-load efficiency - a requirement for IMVP-6® deeper sleep states.
What is the purpose of the SOFT pin on the ISL6261IR7Z?
The SOFT pin on the ISL6261IR7Z serves two key roles: it sets the output voltage slew rate during startup and mode transitions via an external capacitor to GND, and it functions as the non-inverting input to the error amplifier. During startup, a 41µA current charges the SOFT capacitor to ramp VO to boot voltage (1.2V); during deeper sleep transitions (DPRSLPVR = 1), the slew rate reduces to ±2mV/µs to suppress audible noise, while active-mode slewing reaches ±10mV/µs for fast wake-up recovery.
Can the ISL6261IR7Z be used in new designs given its 2006 datasheet date?
Yes, the ISL6261IR7Z remains actively manufactured and supported by Renesas Electronics, with full documentation, application notes, and long-term availability commitments. Its IMVP-6® compliance, robust R3™ modulator architecture, and proven reliability in shipping laptop platforms make it suitable for new designs targeting Intel Pentium M/Core Solo/Duo-era compatibility or cost-optimized single-phase VRMs where newer multi-phase controllers are unnecessary.
ISL6261IR7Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- Robust Ripple Regulator™ (R3)
- Package/Case:
- 48-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:
- 48-QFN (7x7)
ISL6261IR7Z FAQ
1.How can I place an order for ISL6261IR7Z through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6261IR7Z 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 reliable?
The price and inventory of ISL6261IR7Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6261IR7Z is usually 5 days.
3.What payment methods are accepted for ISL6261IR7Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6261IR7Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6261IR7Z?
ISL6261IR7Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6261IR7Z 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?
For technical support, including ISL6261IR7Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6261IR7Z requirements.
6.How does Aetrix verify that ISL6261IR7Z is sourced from the original manufacturer or authorized distributors?
All ISL6261IR7Z 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 meets industry standards.
7.What is the process for return or replacement of ISL6261IR7Z?
All ISL6261IR7Z units undergo pre-shipment inspection (PSI). If there is an issue with ISL6261IR7Z, 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 part is unused and in its original packaging.
Return procedure for ISL6261IR7Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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