My Inquiry
My Account
Renesas ISL6261CRZ-T
- Part No.:
- ISL6261CRZ-T
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
ISL6261CRZ-T.pdf
- Description:
- IC REG CONV INTEL 1OUT 40QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,626
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ISL6261CRZ-T from Renesas Electronics (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. It is used in laptop motherboard VRMs delivering up to 25A to Pentium-class processors.
For engineers reviewing the ISL6261CRZ-T datasheet, ISL6261CRZ-T pinout, ISL6261CRZ-T application, or ISL6261CRZ-T equivalent, key selection considerations include IMVP-6® compliance, DCR/resistive current sensing support, thermal monitoring via NTC input, forced CCM vs. diode emulation mode control, and 40-pin 6×6 QFN package compatibility with Intel mobile platform power sequencing requirements.
Technical Context
The ISL6261CRZ-T employs patented R3™ modulator architecture that synthesizes inductor ripple current internally and uses hysteretic comparators on noise-free analog signals-enabling lower output ripple and faster transient response than fixed-frequency or conventional hysteretic controllers. Its error amplifier provides 90dB DC gain and 18MHz gain-bandwidth product for precise load-line regulation.
It implements Intel IMVP-6® dynamic voltage positioning via differential remote sensing (VSEN/RTN), supports dual current-sensing methods (lossless DCR with NTC thermal compensation or precision resistive), and delivers programmable switching frequency (200–500kHz) via VW-COMP resistor network. Operational modes-including forced CCM, diode emulation (DEM), and enhanced DEM-are controlled by DPRSTP#, FDE, and DPRSLPVR logic inputs per Table 2 of FN9251.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage Range | 0.300V to 1.500V in 12.5mV steps via 7-bit VID interface; supports full IMVP-6® specification including deeper sleep voltage scaling. |
| System Voltage Accuracy | ±0.5% over -10°C to +100°C ambient; ensures stable CPU core voltage under thermal stress and load transients. |
| Switching Frequency | 200–500kHz user-programmable via external resistor on VW pin; enables optimization of efficiency vs. size trade-offs in mobile VRM designs. |
| Gate Drive Capability | 2A source/sink per UGATE/LGATE; drives high-side and low-side MOSFETs directly without external buffers in ≤25A applications. |
| Current Sensing | Supports both lossless inductor DCR sensing (with NTC thermal compensation) and precision resistive sensing; maintains accurate load-line droop across temperature. |
| Protection Features | Overvoltage (1.7V immediate shutdown + 200mV 1ms trip), undervoltage (-300mV), overcurrent (120µs delay), and overtemperature (NTC-based VR_TT# assertion). |
| Thermal Resistance | θJA = 33°C/W (6×6 QFN); enables reliable operation at 125°C junction temperature in compact laptop PCB layouts. |
Pinout & Package
ISL6261CRZ-T is housed in a 40-lead, 6mm × 6mm, 0.5mm pitch QFN package with exposed thermal pad (PKG DWG L40.6x6). The package supports Pb-free reflow (RoHS compliant) and is rated for -10°C to +100°C ambient operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VID0–VID6 | 7-bit voltage identification input | LSB-to-MSB digital interface setting core output voltage per IMVP-6® VID table; supports on-the-fly changes during CPU state transitions. |
| UGATE / LGATE | High-side / low-side MOSFET gate drivers | 2A capable outputs driving external N-channel MOSFETs; UGATE referenced to PHASE, LGATE referenced to VSSP for synchronous buck topology. |
| VSEN / RTN | Differential remote sense inputs | Connect directly to CPU die power pads to eliminate PCB IR drop; enables ±0.5% regulation accuracy at point-of-load. |
| FDE / DPRSTP# / DPRSLPVR | Mode control logic inputs | Configure operational mode: FDE=1+DPRSTP#=0 enables Enhanced Diode Emulation for deeper sleep efficiency; DPRSLPVR=1 asserts slow slew rate (2mV/µs). |
| OCSET / DROOP / VW / COMP | Current sensing & loop compensation nodes | OCSET sets overcurrent threshold via 10µA current source; DROOP provides high-bandwidth current representation; VW programs switching frequency; COMP is error amplifier output. |
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 without sacrificing steady-state ripple. |
| Dual current sensing architecture | Enables either DCR-based lossless sensing (with NTC thermal compensation for copper winding drift) or precision shunt-based sensing-ensuring accurate load-line compliance across temperature and board life. |
| Enhanced Diode Emulation Mode (EDEM) | Increases VW-COMP voltage window by 33% when FDE=1, further reducing switching frequency at light load to maximize efficiency in deeper sleep states without audible noise. |
| Integrated thermal monitoring | NTC input with 60µA current source and dedicated VR_TT# open-drain output enables direct connection to system thermal management logic for CPU throttling or shutdown. |
| IMVP-6®-compliant soft-start & sequencing | SOFT capacitor controls output slew rate (2mV/µs in deeper sleep, 10mV/µs in active mode); CLK_EN# asserts 20µs after PGD_IN and Vcore stability-synchronizing with Intel platform clocks. |
Applications
| Laptop CPU Core VRM | Intel Mobile Platform Power Management |
|---|---|
Use Scenario: Regulating core voltage for Intel Pentium M and Core Solo/Duo processors in ultraportable notebooks with strict thermal and battery-life constraints. IC Role / Device Role / Timing Role: Primary single-phase buck controller implementing IMVP-6® protocol, providing dynamic VID adjustment, remote sensing, and seamless transition between active/deeper sleep modes. Use Value: Enables >90% peak efficiency at 25A load and >85% at 1A via diode emulation, extending battery runtime while maintaining ±0.5% voltage accuracy at the CPU die. | Use Scenario: Power delivery subsystem in OEM laptop motherboards requiring compliance with Intel's mobile voltage positioning specifications and platform-level power state coordination. IC Role / Device Role / Timing Role: System-level voltage regulator coordinating with MCH_PWRGD (PGD_IN), VR_ON enable, and CPU sleep signals (DPRSTP#, DPRSLPVR) to manage power sequencing and thermal events. Use Value: Integrates PGOOD, VR_TT#, and CLK_EN# timing outputs to synchronize with chipset clocks and thermal management firmware-eliminating need for discrete logic or FPGA glue. |
| Mobile Workstation VRM | Embedded Intel CPU Power Solution |
Use Scenario: High-performance mobile workstations using Intel Core 2 Duo processors where transient response and thermal headroom are critical for sustained compute loads. IC Role / Device Role / Timing Role: Single-phase core regulator with R3™ modulator delivering sub-10µs load-step response and differential remote sensing to maintain voltage stability under multi-threaded workloads. Use Value: Achieves <15mV undershoot on 10A load step due to variable-frequency transient response-preventing CPU reset or instruction corruption during burst activity. | Use Scenario: Fanless embedded systems (e.g., industrial tablets, medical diagnostics) using Intel Atom or early Core processors requiring long-term reliability and RoHS-compliant power delivery. IC Role / Device Role / Timing Role: IMVP-6®-compliant VR controller supporting Pb-free reflow, 125°C junction rating, and latch-off protection triggered by PGD_IN fault to ensure fail-safe behavior in unattended operation. Use Value: Provides robust overtemperature (VR_TT#), overvoltage (1.7V immediate clamp), and undervoltage (-300mV) protection-meeting IEC 62368-1 safety requirements for Class I equipment. |
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 |
|---|---|---|---|
| ISL6260CRZ-T | Same 40-pin QFN package and R3™ architecture but lacks DPRSLPVR input and deeper sleep support; no EDEM mode. | Restricted to IMVP-5 or basic IMVP-6® active-mode-only applications; cannot enter deeper sleep voltage scaling or slow-slew states. | Select ISL6260CRZ-T only if platform does not require deeper sleep mode signaling and simpler BOM is prioritized. |
| RT8802CGQW | Single-phase IMVP-6® controller with integrated MOSFET drivers, but uses different modulator (adaptive on-time) and lacks NTC-based DCR thermal compensation circuitry. | Requires external thermal compensation network for DCR sensing; less accurate load-line tracking over temperature versus ISL6261CRZ-T. | Choose RT8802CGQW when cost sensitivity outweighs thermal accuracy requirements and layout space allows added compensation components. |
Compared with ISL6261CRZ-T, ISL6260CRZ-T omits deeper sleep control and thermal compensation, limiting its use to legacy IMVP-5 platforms, while RT8802CGQW trades integrated NTC compensation for lower gate count but requires external circuitry to match ISL6261CRZ-T's ±0.5% system accuracy across temperature.
Availability
ISL6261CRZ-T is available at Aetrix Electronics and suitable for laptop motherboard design, Intel mobile platform validation, and embedded CPU power supply development requiring stable component supply, long-lifecycle support, and RoHS-compliant manufacturing.
Supply support for ISL6261CRZ-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 technical support and manufacturing continuity for the ISL6261 product family.
The ISL6261 belongs to Renesas' mobile power management IC portfolio, designed specifically for Intel IMVP-6®-compliant single-phase CPU core regulators in space-constrained, thermally sensitive notebook and mobile workstation applications.
FAQ
What is the maximum output current supported by the ISL6261CRZ-T?
The ISL6261CRZ-T is specified for single-phase core regulator applications up to 25A. Its 2A gate drivers, thermal resistance (θJA = 33°C/W), and R3™ modulator architecture enable stable operation at this current level when paired with appropriately rated external MOSFETs, inductors, and PCB copper area. Actual achievable current depends on layout, airflow, and component selection per Figures 2 and 3 in FN9251.
Does the ISL6261CRZ-T support both DCR and resistive current sensing?
Yes, the ISL6261CRZ-T supports both lossless inductor DCR current sensing-with built-in NTC thermistor compensation-and precision resistive current sensing. The DCR method uses VSUM, NTC, and RBIAS pins to maintain load-line accuracy across temperature, while resistive sensing connects a shunt resistor between PHASE and VSSP. Both methods feed into the same droop amplifier (DROOP pin) for IMVP-6® compliance.
How does the ISL6261CRZ-T achieve faster transient response than conventional PWM controllers?
The ISL6261CRZ-T achieves faster transient response through its patented R3™ modulator, which synthesizes inductor ripple current internally and uses hysteretic comparators on clean analog signals. During load transients, it commands higher switching frequency to deliver energy more rapidly-reducing undershoot/overshoot-while maintaining low steady-state ripple and phase jitter. This differs from fixed-frequency controllers that rely solely on error amplifier bandwidth.
What is the function of the FDE pin on the ISL6261CRZ-T?
The FDE (Forced Diode Emulation Enable) pin on the ISL6261CRZ-T, when asserted high with DPRSTP# low, forces the IC into Enhanced Diode Emulation Mode (EDEM). This increases the VW-COMP voltage window by 33%, further reducing switching frequency at light load to maximize efficiency in deeper sleep mode-critical for extending battery life in Intel mobile platforms.
Is the ISL6261CRZ-T RoHS compliant and compatible with lead-free reflow processes?
Yes, the ISL6261CRZ-T is RoHS compliant and qualified for Pb-free reflow. It uses 100% matte tin plate termination finish and Pb-free molding compounds/die attach materials, meeting IPC/JEDEC J-STD-020 moisture sensitivity level (MSL) requirements for peak reflow temperatures ≥260°C. The "-T" suffix denotes tape-and-reel packaging compatible with automated SMT assembly.
ISL6261CRZ-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:
- -10°C ~ 100°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-QFN (6x6)
ISL6261CRZ-T FAQ
1.How can I place an order for ISL6261CRZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6261CRZ-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 ISL6261CRZ-T reliable?
The price and inventory of ISL6261CRZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6261CRZ-T is usually 5 days.
3.What payment methods are accepted for ISL6261CRZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6261CRZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6261CRZ-T?
ISL6261CRZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6261CRZ-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 ISL6261CRZ-T?
For technical support, including ISL6261CRZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6261CRZ-T requirements.
6.How does Aetrix verify that ISL6261CRZ-T is sourced from the original manufacturer or authorized distributors?
All ISL6261CRZ-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 ISL6261CRZ-T meets industry standards.
7.What is the process for return or replacement of ISL6261CRZ-T?
All ISL6261CRZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL6261CRZ-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 ISL6261CRZ-T part is unused and in its original packaging.
Return procedure for ISL6261CRZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL6261CRZ-T Tags
-
TPS51206DSQR
Texas Instruments
-
TPS51200DRCR
Texas Instruments
-
TPS51200DRCT
Texas Instruments
-
TPS62740DSSR
Texas Instruments
-
TPS51100DGQR
Texas Instruments
-
NCP51200MNTXG
onsemi
-
NCP51400MNTXG
onsemi
-
RT9026GSP
Richtek USA Inc.
-
LP2998MRX/NOPB
Texas Instruments
-
TPS51200QDRCRQ1
Texas Instruments
-
DPA423GN-TL
Power Integrations
-
LM10011SD/NOPB
Texas Instruments
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
