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Renesas ISL6308CRZ-T
- Part No.:
- ISL6308CRZ-T
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
ISL6308CRZ-T.pdf
- Description:
- IC REG CTRLR DDR 1OUT 40QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,711
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Product details
Overview
ISL6308CRZ-T from Renesas (formerly Intersil) is a three-phase buck PWM controller IC with integrated high-current MOSFET drivers, designed for precision voltage regulation in high-current, low-voltage point-of-load applications. It supports 1/2/3-phase operation, delivers ±0.5% system accuracy at 1.2V/1.5V reference settings, features dual DCR/rDS(ON) current sensing, and operates up to 275 kHz per phase with 5–12 V gate-drive bias.
For engineers reviewing the ISL6308CRZ-T datasheet, ISL6308CRZ-T pinout, ISL6308CRZ-T application, or ISL6308CRZ-T equivalent, key selection considerations include its 40-lead 6×6 mm QFN package, remote differential voltage sensing capability, programmable droop function, integrated overvoltage/overcurrent protection with OVP output, and compatibility with pre-biased load startup.
Technical Context
The ISL6308CRZ-T implements interleaved three-phase PWM control using a sawtooth oscillator synchronized across channels, with phase timing determined by 2PH/3PH logic inputs and PVCC pin states. Its error amplifier features 96 dB DC gain and 20 MHz gain-bandwidth product, enabling stable Type II/III compensation networks tied between FB and COMP pins.
Current sensing combines lossless rDS(ON) sampling on ISEN1–ISEN3 for per-channel balance and continuous DCR-based sensing via ISUM/IREF/ICOMP for load-line droop and overcurrent protection. The DAC reference (0.6V/0.9V/1.2V/1.5V) is selected via REF0/REF1 TTL-level inputs and can be dynamically changed during operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Oscillator Frequency | 225–275 kHz - sets base switching frequency; adjustable via FS-to-GND resistor |
| System Accuracy | ±0.5% at 1.2V/1.5V references - ensures tight output regulation over temperature for DDR/FPGA core rails |
| Gate Drive Bias Range | 5–12 V - supports wide-range MOSFET selection with adaptive upper/lower drive resistance |
| OCSET Trip Current | 100 µA ±7% - defines overcurrent threshold via external resistor to ICOMP |
| Remote Sensing Accuracy | ±0.8% at 0.6V/0.9V - enables precise load-point voltage regulation despite PCB IR drop |
| Thermal Shutdown | 160°C setpoint - protects against sustained overload or poor heatsinking in high-power applications |
| PGOOD Threshold Hysteresis | ±100 mV - provides noise-immune power-good signaling for system sequencing |
Pinout & Package
ISL6308CRZ-T is housed in a RoHS-compliant 40-lead 6×6 mm QFN package (PKG DWG # L40.6x6) with exposed thermal pad. Pin functions are validated per FN9208 Rev 4.00 datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (6) | Bias supply input | +5 V ±5% supply for internal logic; requires local 1 µF ceramic decoupling |
| PVCC1–PVCC3 (33,24,18) | Channel gate-drive supplies | Independent +5–12 V sources per phase; grounding disables corresponding phase |
| UGATE1–UGATE3 (31,27,20) | Upper MOSFET gate drivers | High-side outputs with adaptive non-overlap timing to prevent shoot-through |
| LGATE1–LGATE3 (34,23,17) | Lower MOSFET gate drivers | Synchronous rectifier drivers; no external series resistors permitted |
| ISEN1–ISEN3 (32,25,19) | rDS(ON) current sense inputs | Sample lower-FET conduction current for per-phase balancing |
| ISUM/IREF/ICOMP (15,16,13) | DCR current sense interface | Supports lossless inductor DCR sensing for droop and overcurrent protection |
| REF0/REF1 (40,39) | DAC reference select | 2-bit TTL inputs selecting 0.6V/0.9V/1.2V/1.5V internal DAC reference |
| DROOP (14) | Droop enable/disable | Tie to ICOMP to enable load-line programming; tie to IREF to disable |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 3-phase PWM + drivers | Reduces BOM count vs. discrete controller+driver solutions; eliminates interconnect parasitics |
| Dual current sensing architecture | Combines rDS(ON) (channel balance) and DCR (load line + OCP) for optimal accuracy and robustness |
| Differential remote sensing (VDIFF) | Compensates for PCB trace resistance between regulator and load, maintaining ±0.8% regulation at point-of-load |
| Programmable reference offset (OFST) | Enables fine-tuning of output voltage via external resistor to GND/VCC without modifying feedback network |
| Digital soft-start & pre-biased startup | Prevents inrush into already-powered loads; supports hot-swap and multi-rail sequencing requirements |
Applications
| DDR Memory Core Regulator | FPGA Core Voltage Supply |
|---|---|
Use Scenario: Regulating 1.2 V/1.5 V core voltage for DDR2/DDR3 memory subsystems with dynamic current demands up to 60 A. IC Role / Device Role / Timing Role: Three-phase buck controller providing interleaved switching, precise voltage positioning, and fast transient response. Use Value: Dual current sensing ensures channel current balance under step-load transients, minimizing thermal stress and improving reliability. | Use Scenario: Delivering tightly regulated 0.9 V–1.2 V core power to high-density FPGAs with rapid load changes during configuration and reconfiguration. IC Role / Device Role / Timing Role: Precision voltage regulator with remote sensing and programmable droop to maintain stability across wide load ranges. Use Value: ±0.5% system accuracy at 1.2 V reference guarantees compliance with FPGA core voltage tolerance specifications. |
| ASIC Point-of-Load Converter | Chipset Voltage Regulator |
Use Scenario: High-current, low-voltage DC/DC conversion for ASIC SoCs in networking and storage equipment requiring <2.3 V outputs. IC Role / Device Role / Timing Role: Multi-phase controller with integrated drivers managing up to three synchronous buck stages. Use Value: 40-lead QFN package enables compact layout; thermal shutdown (160°C) safeguards against prolonged overload conditions. | Use Scenario: Powering northbridge/southbridge chipsets in servers and workstations where thermal management and voltage accuracy are critical. IC Role / Device Role / Timing Role: Primary voltage regulator implementing load-line droop to match chipset VID requirements. Use Value: Adjustable droop via DROOP pin allows tuning of output impedance to meet specific chipset load-line specifications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-phase buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6308A | Successor with improved thermal performance, tighter reference accuracy (±0.3%), and enhanced OVP response time | Recommended for new designs; supports same 40-pin QFN footprint but requires updated layout for thermal pad optimization | Select ISL6308A when designing new systems requiring extended lifetime, higher reliability, or stricter voltage tolerance. |
| IR35201 | Three-phase controller with digital interface (SVID), PMBus support, and built-in telemetry; lacks integrated gate drivers | Used in server VRMs requiring digital control and telemetry; requires external high-current drivers | Choose IR35201 only if digital communication, fault logging, or dynamic VID adjustment are required - not a drop-in replacement. |
Compared with ISL6308CRZ-T, ISL6308A offers superior accuracy and thermal robustness for new designs, while IR35201 provides digital configurability at the cost of increased component count and layout complexity - neither is pin-compatible, and both require board-level redesign.
Availability
ISL6308CRZ-T is available at Aetrix Electronics and suitable for high-current DDR memory regulators, FPGA core supplies, and chipset voltage regulation requiring stable component supply across industrial temperature ranges (0°C to +70°C).
Supply support for ISL6308CRZ-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 legacy product support, including technical documentation, validation data, and long-term supply commitments for industrial-grade analog and power management ICs.
The ISL6308CRZ-T belongs to Renesas' high-current multiphase buck controller family, engineered specifically for precision, low-voltage point-of-load regulation in computing and communications infrastructure where thermal efficiency and voltage accuracy are critical.
FAQ
What is the operating temperature range for the ISL6308CRZ-T?
The ISL6308CRZ-T is rated for an ambient operating temperature range of 0°C to +70°C, as specified in the ordering information table of the FN9208 datasheet. This commercial-grade rating aligns with its intended use in non-extended-temperature computing and embedded applications. Thermal shutdown activates at 160°C junction temperature to protect against sustained overload.
Does the ISL6308CRZ-T support single-phase operation?
Yes, the ISL6308CRZ-T supports 1-, 2-, or 3-phase operation. Single-phase mode is enabled by grounding both the 2PH and 3PH pins (Pins 2 and 1), or by connecting PVCC2 and PVCC3 to GND. The controller automatically detects active phases and adjusts PWM timing accordingly - no firmware or external configuration is required.
How is output voltage programmed on the ISL6308CRZ-T?
Output voltage on the ISL6308CRZ-T is programmed using either the internal DAC or an external reference. The 2-bit REF0/REF1 inputs (Pins 40/39) select one of four fixed DAC reference voltages: 0.6 V, 0.9 V, 1.2 V, or 1.5 V. Alternatively, an external reference up to 1.75 V may be applied directly to the REF pin (Pin 4), bypassing the DAC entirely.
What protection features does the ISL6308CRZ-T include?
The ISL6308CRZ-T integrates multi-tiered protection: overvoltage protection (OVP) clamps output by turning on lower MOSFETs and asserts the open-drain OVP pin to drive external crowbar devices; overcurrent protection uses OCSET (Pin 12) with ±5 mV comparator offset; undervoltage lockout triggers at 82% of VID; and open sense-line detection monitors VDIFF to detect broken remote-sense connections.
Is the ISL6308CRZ-T pin-compatible with the ISL6308A?
No, the ISL6308CRZ-T is not pin-compatible with the ISL6308A. While both share the same 40-lead QFN package outline, the ISL6308A introduces functional enhancements including revised internal circuitry, updated thermal pad requirements, and modified pin behavior for certain protection thresholds. Migration requires board-level redesign and validation per Renesas' ISL6308A datasheet.
ISL6308CRZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 40-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Applications:
- Controller, DDR
- Voltage - Input:
- 5V ~ 12V
- Number of Outputs:
- 1
- Voltage - Output:
- 0.6V ~ 2.3V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-QFN (6x6)
ISL6308CRZ-T FAQ
1.How can I place an order for ISL6308CRZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6308CRZ-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 ISL6308CRZ-T reliable?
The price and inventory of ISL6308CRZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6308CRZ-T is usually 5 days.
3.What payment methods are accepted for ISL6308CRZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6308CRZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6308CRZ-T?
ISL6308CRZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6308CRZ-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 ISL6308CRZ-T?
For technical support, including ISL6308CRZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6308CRZ-T requirements.
6.How does Aetrix verify that ISL6308CRZ-T is sourced from the original manufacturer or authorized distributors?
All ISL6308CRZ-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 ISL6308CRZ-T meets industry standards.
7.What is the process for return or replacement of ISL6308CRZ-T?
All ISL6308CRZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL6308CRZ-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 ISL6308CRZ-T part is unused and in its original packaging.
Return procedure for ISL6308CRZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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