My Inquiry
My Account
Renesas ISL6261ACRZ-T
- Part No.:
- ISL6261ACRZ-T
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
ISL6261ACRZ-T.pdf
- Description:
- IC REG CONV INTEL 1OUT 40QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,954
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ISL6261ACRZ-T from Intersil is a single-phase IMVP-6® core voltage regulator IC with integrated 2A gate drivers, 7-bit VID input (0.300V–1.500V in 12.5mV steps), ±0.5% system voltage accuracy over temperature, and R3™ Robust Ripple Regulator modulator for fast transient response in mobile CPU power delivery.
For engineers reviewing the ISL6261ACRZ-T datasheet, ISL6261ACRZ-T pinout, ISL6261ACRZ-T application, or ISL6261ACRZ-T equivalent, key selection criteria include IMVP-6® compliance, DCR/resistive current sensing support, three-mode operation (CCM/DEM/EDEM), differential remote sensing at CPU die, and thermal/power monitoring via VR_TT# and PMON pins.
Technical Context
The ISL6261ACRZ-T implements Intel's IMVP-6® protocol with patented R3™ modulator architecture that synthesizes inductor ripple for hysteretic PWM control while retaining an error amplifier for precise 0.5% regulation. It supports dynamic VID changes on-the-fly and uses variable switching frequency during load transients to achieve faster response than fixed-frequency buck controllers.
It delivers up to 25A output with three configurable operating modes: Continuous Conduction Mode (CCM) for active CPU states, Diode Emulation Mode (DEM) for light-load efficiency in sleep, and Enhanced DEM (EDEM) with +40% VW-COMP window for deeper sleep-each selected via DPRSTP#, DPRSLPVR, and FDE logic inputs per Table 2 of the datasheet.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage Range | 0.300V to 1.500V in 12.5mV steps via 7-bit VID; supports full IMVP-6® voltage table including 0.300V minimum and 1.500V maximum. |
| System Voltage Accuracy | ±0.5% over -10°C to +100°C ambient for VID = 0.75V–1.5V; enables tight CPU core voltage regulation without external calibration. |
| Switching Frequency | 200–500 kHz user-programmable via resistor between VW and COMP; nominal 333 kHz at RFSET = 7kΩ. |
| Gate Drive Capability | 2A source/sink per UGATE/LGATE; UGATE sink resistance ≤1.5Ω, LGATE sink resistance ≤0.9Ω ensures robust MOSFET switching up to 25A. |
| Power Monitor Output | PMON provides high-bandwidth analog voltage proportional to instantaneous CPU power (VPMON ≈ 35 × (VSEN−RTN) × (DROOP−VO)); max 3.0V output. |
| Thermal Protection | NTC-based overtemperature detection with 1.17–1.25V trip threshold; open-drain VR_TT# asserts immediately upon fault. |
| Current Sensing | Supports both lossless inductor DCR sensing (with NTC thermal compensation) and precision resistive sensing; DROOP pin outputs high-bandwidth current representation. |
Pinout & Package
ISL6261ACRZ-T is housed in a thermally enhanced 40-lead 6×6 mm QFN package (L40.6x6) with exposed GND pad for improved heat dissipation and low θJC = 6°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VID0–VID6 | 7-bit digital voltage identification input | LSB-to-MSB interface to CPU for dynamic core voltage setting; supports on-the-fly VID changes per IMVP-6® timing. |
| UGATE / LGATE | Upper/lower MOSFET gate drive outputs | Integrated 2A drivers directly control external high-side and low-side power MOSFETs; eliminates need for external drivers. |
| VSEN / RTN | Differential remote sense inputs | Connects to CPU die pads to regulate voltage precisely at point-of-load; compensates PCB IR drop for ±0.5% accuracy. |
| PMON | Analog power monitor output | Delivers real-time CPU power signal (up to 3.0V) for system-level power optimization and battery life extension. |
| FDE / DPRSLPVR / DPRSTP# | Mode control logic inputs | Configure CCM/DEM/EDEM operation per CPU sleep state; enable adaptive efficiency scaling without firmware intervention. |
| VR_TT# | Open-drain thermal fault indicator | Asserts low on overtemperature; sinks ≥20mA with <9Ω pull-down resistance for direct microcontroller interrupt signaling. |
Key Features
| Feature | Design Value |
|---|---|
| R3™ Robust Ripple Regulator modulator | Combines hysteretic speed with error amplifier precision-enables faster transient response than fixed-frequency PWM while maintaining 0.5% DC accuracy. |
| Three adaptive operating modes (CCM/DEM/EDEM) | Automatically switches between continuous conduction, diode emulation, and enhanced diode emulation based on CPU mode signals to maximize light-load efficiency. |
| Differential remote voltage sensing | True Kelvin sensing at CPU die via VSEN/RTN pins ensures regulated voltage meets IMVP-6® specification despite PCB trace resistance. |
| Programmable switching frequency | Resistor-set frequency (200–500 kHz) allows optimization for efficiency vs. size trade-offs; avoids EMI-sensitive bands in mobile platforms. |
| Integrated power and thermal monitoring | PMON and VR_TT# provide real-time analog power data and immediate thermal fault signaling-enables intelligent system power management. |
Applications
| Mobile CPU Core Power Delivery | IMVP-6®-Compliant Notebook VRMs |
|---|---|
Use Scenario: Regulating core voltage for Intel Pentium M and Core Solo/Duo processors in ultraportable notebooks. IC Role / Device Role / Timing Role: Primary single-phase buck controller implementing IMVP-6® protocol with dynamic VID, load-line droop, and mode transitions synchronized to CPU sleep states. Use Value: Enables >90% peak efficiency across 0–25A load range and extends battery runtime by 12–18% in deeper sleep modes via EDEM operation. | Use Scenario: High-density VRM design on space-constrained motherboard layouts where board area and thermal performance are critical. IC Role / Device Role / Timing Role: Integrated gate driver + controller reduces component count by 4–6 discrete drivers; 6×6 mm QFN package saves >30% PCB area versus dual-chip solutions. Use Value: Eliminates external gate drivers and associated layout complexity while maintaining 25A capability and IMVP-6® compliance. |
| DCR-Based Current Sensing Systems | Thermally Adaptive Load-Line Regulation |
Use Scenario: Cost-sensitive notebook designs using copper inductor DCR for current sensing instead of shunt resistors. IC Role / Device Role / Timing Role: Provides NTC thermistor network interface (NTC pin) and internal gain/phase compensation to maintain IMVP-6® load-line accuracy over –10°C to +100°C. Use Value: Achieves ±1% load-line error across temperature without calibration-reduces BOM cost and improves long-term reliability. | Use Scenario: High-performance mobile platforms requiring precise thermal-aware voltage positioning during CPU turbo boost and throttling events. IC Role / Device Role / Timing Role: Uses VR_TT# fault signal and PMON power data to coordinate voltage scaling with thermal management firmware in real time. Use Value: Prevents thermal runaway during sustained turbo operation by enabling dynamic voltage reduction before junction temperature exceeds 125°C. |
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 |
|---|---|---|---|
| ISL6261AIRZ-T | Wider temperature range (–40°C to +100°C vs. –10°C to +100°C); same pinout, electrical specs, and IMVP-6® functionality. | Suitable for extended-temperature industrial or automotive-adjacent computing applications where ambient exceeds –10°C. | Select ISL6261AIRZ-T only if operation below –10°C is required; otherwise ISL6261ACRZ-T offers identical performance at lower cost. |
| RT8802CGQW | Single-phase IMVP-6® controller with integrated drivers; supports 0.3–1.5V VID but specifies ±0.8% system accuracy (vs. ±0.5%) and lacks PMON power monitor output. | Applicable where power telemetry is not needed and slightly relaxed voltage accuracy is acceptable for cost-sensitive designs. | Choose RT8802CGQW only when PMON functionality is unnecessary and ±0.8% accuracy meets system requirements; not a drop-in replacement due to different pinout and feature set. |
Compared with ISL6261AIRZ-T, the ISL6261ACRZ-T trades extended temperature rating for cost efficiency in commercial mobile platforms; compared with RT8802CGQW, it delivers superior voltage accuracy and unique real-time power monitoring-critical for battery life optimization in ultrabooks.
Availability
ISL6261ACRZ-T is available at Aetrix Electronics and suitable for mobile CPU power delivery, IMVP-6®-compliant notebook VRMs, and thermally adaptive load-line regulation requiring stable component supply and long-term lifecycle support.
Supply support for ISL6261ACRZ-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
Intersil (now part of Renesas Electronics) is a semiconductor company specializing in high-performance analog and power management ICs for computing, communications, and industrial markets.
The ISL6261ACRZ-T belongs to Intersil's IMVP-6® core regulator product line, designed specifically to meet Intel's mobile CPU voltage regulation specifications with integrated gate drivers, adaptive efficiency modes, and system-level monitoring features.
FAQ
What is the operating temperature range for the ISL6261ACRZ-T?
The ISL6261ACRZ-T is specified for an ambient operating temperature range of –10°C to +100°C, with junction temperature rated up to +125°C. This range aligns with commercial mobile computing applications and is confirmed in the "Recommended Operating Conditions" section of the FN6354.2 datasheet. The ISL6261ACRZ-T does not support operation below –10°C; for extended temperature use, the ISL6261AIRZ-T variant is recommended.
Does the ISL6261ACRZ-T support both DCR and resistive current sensing?
Yes, the ISL6261ACRZ-T supports both lossless inductor DCR current sensing and precision resistive current sensing. DCR sensing uses the VSUM, NTC, and DROOP pins with an external thermistor network for temperature compensation, while resistive sensing connects a current-sense resistor between the phase node and ground. Both methods feed into the droop amplifier to implement IMVP-6® load-line regulation, and the choice depends on cost, accuracy, and thermal design requirements.
How does the ISL6261ACRZ-T achieve fast transient response?
The ISL6261ACRZ-T achieves fast transient response through its patented R3™ Robust Ripple Regulator modulator, which commands variable switching frequency during load transients-increasing frequency under load step-up and decreasing it under load step-down. This architecture, combined with differential remote sensing and a high-gain error amplifier (90 dB DC gain, 18 MHz GBW), enables sub-microsecond response to CPU load changes while maintaining ±0.5% steady-state accuracy.
What protection features are integrated into the ISL6261ACRZ-T?
The ISL6261ACRZ-T integrates overvoltage (OVH = +195 mV, OVHS = 1.7 V), undervoltage (UVf = –300 mV), overcurrent (120 µs delay), severe overcurrent (<2 µs), and overtemperature (via NTC pin) protections. All faults latch PGOOD low and tri-state PWM outputs; recovery requires toggling VR_ON or VDD. The VR_TT# pin provides immediate open-drain thermal fault signaling, and PMON enables predictive power-based fault mitigation.
Can the ISL6261ACRZ-T be used in systems requiring IMVP-6® compliance?
Yes, the ISL6261ACRZ-T is explicitly designed and validated for Intel IMVP-6® compliance. It implements all required protocol elements: 7-bit VID interface with on-the-fly updates, DPRSTP#/DPRSLPVR-controlled mode transitions (CCM/DEM/EDEM), IMVP-6® load-line droop, power-good timing (tpgd = 6.8 ms), CLK_EN# synchronization, and thermal/power monitoring per specification. Its functional block diagram and application circuits in FN6354.2 confirm full IMVP-6® alignment.
ISL6261ACRZ-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:
- Active
- 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)
ISL6261ACRZ-T FAQ
1.How can I place an order for ISL6261ACRZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6261ACRZ-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 ISL6261ACRZ-T reliable?
The price and inventory of ISL6261ACRZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6261ACRZ-T is usually 5 days.
3.What payment methods are accepted for ISL6261ACRZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6261ACRZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6261ACRZ-T?
ISL6261ACRZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6261ACRZ-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 ISL6261ACRZ-T?
For technical support, including ISL6261ACRZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6261ACRZ-T requirements.
6.How does Aetrix verify that ISL6261ACRZ-T is sourced from the original manufacturer or authorized distributors?
All ISL6261ACRZ-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 ISL6261ACRZ-T meets industry standards.
7.What is the process for return or replacement of ISL6261ACRZ-T?
All ISL6261ACRZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL6261ACRZ-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 ISL6261ACRZ-T part is unused and in its original packaging.
Return procedure for ISL6261ACRZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL6261ACRZ-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…
