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Renesas ISL6353CRTZ-TK
- Part No.:
- ISL6353CRTZ-TK
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
ISL6353CRTZ-TK.pdf
- Description:
- IC REG CTRLR DDR 1OUT 40TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,351
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Product details
Overview
ISL6353CRTZ-TK from Renesas (formerly Intersil) is a three-phase VR12-compliant PWM buck regulator controller for DDR memory power delivery. It integrates two MOSFET gate drivers, supports DCR/resistor current sensing, delivers 5-mV VID voltage steps, and achieves fast transient response via Robust Ripple Regulator™ (R3) technology in applications such as DDR3/DDR4 memory subsystems.
For engineers reviewing the ISL6353CRTZ-TK datasheet, ISL6353CRTZ-TK pinout, ISL6353CRTZ-TK application, or ISL6353CRTZ-TK equivalent, key selection criteria include VR12 SVID bus compliance, programmable 1-/2-/3-phase operation, differential remote voltage sensing, thermal alert with NTC interface, and R3 modulator-based light-load PFM efficiency.
Technical Context
The ISL6353CRTZ-TK implements a multiphase R3 modulator architecture where a master clock generates phase-shifted slave clocks (120° in 3-phase mode), and each phase uses a synthesized ripple voltage (Vcrs) referenced to the VW/COMP window to determine PWM on-time. This eliminates phase jitter while retaining error amplifier-based precision regulation.
It supports dynamic phase shedding across PS0/PS1/PS2 power states via SVID commands or external PSI/VSET pins, enables adaptive body diode conduction time reduction, and provides independent OCP thresholds per power state - e.g., 60 µA nominal overcurrent trip in PS0 (3-phase), dropping to 20 µA in PS1/PS2 1-phase mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Regulation Standard | VR12 Serial VID (SVID) compliant; supports Intel VR12 protocol for DDR memory VDDQ/VDDP control. |
| Phase Configuration | Programmable 1-, 2-, or 3-phase interleaved operation; phase count dynamically adjustable via SVID or PSI pin. |
| Voltage Accuracy | ±0.5% system accuracy over 0.75–1.50 V VID range; ±8 mV over 0.5–0.7375 V range - enables tight DDR memory rail tolerance. |
| Switching Frequency | 200–500 kHz programmable via resistor on VW pin (18 kΩ → ~300 kHz); supports CCM and PFM modes. |
| Current Sensing | Dual-mode support: lossless DCR sensing with single NTC thermistor compensation or precision resistor sensing. |
| Thermal Monitoring | Integrated thermal alert (VR_HOT#) and ALERT# outputs; NTC input with 60 µA source current for accurate die temperature tracking. |
| Protection Features | OCP/WOC, OVP (145–200 mV over setpoint), PGOOD, and current imbalance detection (20 mV threshold). |
Pinout & Package
ISL6353CRTZ-TK is housed in a Pb-free 40-lead 5 mm × 5 mm TQFN package with exposed thermal pad (L40.5x5). Pin assignments are validated per FN6897 Rev 0.00 datasheet, Page 4.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| UG1, UG2 | High-side MOSFET gate drivers | Drive Phase 1/2 upper FET gates; 2 A sink/source capability with <30 ns deadtime control. |
| LG1, LG2 | Low-side MOSFET gate drivers | Drive Phase 1/2 lower FET gates; 4 A sink capability ensures robust synchronous rectification. |
| ISEN1–ISEN3 | Per-phase current sense inputs | Accept DCR or resistor-based current signals; ISEN2/ISEN3 disable phases when pulled high. |
| VSEN / RTN | Differential remote voltage sense pair | Enables precise load-point regulation by referencing feedback to DDR memory IC VDDQ pins. |
| SDA / SCLK / ALERT# | SVID serial bus interface | Connect directly to CPU SVID host; open-drain ALERT# reports thermal/fault events without polling. |
| VR_ON / PSI / VSET1/VSET2 | Hardware control inputs | Enable/disable regulator (VR_ON), select power state (PSI), or override VID (VSET1/VSET2) without SVID traffic. |
Key Features
| Feature | Design Value |
|---|---|
| Robust Ripple Regulator™ (R3) | Variable-frequency modulation during transients + natural PFM at light load → 95% peak efficiency and <20 µs recovery from 26 A step. |
| VR12 SVID Compliance | Full register mapping for VR12 commands including VR_HOT#, IMON reporting, and phase-drop sequencing per Intel spec. |
| Differential Remote Sensing | VSEN/RTN pair rejects PCB IR drop → maintains ±5 mV regulation accuracy at DDR memory ball pads under dynamic load. |
| Programmable Thermal Alert | NTC-based VR_HOT# asserts below 0.91 V (trip) and releases above 0.965 V (reset) - configurable for system-level thermal throttling. |
| Phase Current Balancing | Active per-phase current monitoring and trimming → ≤20 mV inter-phase current mismatch ensures uniform thermal distribution. |
Applications
| DDR Memory Power Delivery | Server Memory Subsystem |
|---|---|
Use Scenario: Regulating VDDQ for DDR4 memory modules in dual-channel server DIMMs with dynamic power-state transitions. IC Role / Device Role / Timing Role: Primary VR12-compliant controller managing 3-phase buck conversion, SVID communication with CPU, and real-time phase shedding between PS0/PS1/PS2. Use Value: Enables >90% efficiency at 40 A load and sub-100 ns transient response to meet JEDEC DDR4 timing margins. |
Use Scenario: Powering multi-rank RDIMMs in 1U rack servers requiring thermal-aware voltage scaling and fault logging. IC Role / Device Role / Timing Role: Central controller coordinating gate drive timing, current monitoring (IMON), and thermal alert (VR_HOT#) for BMC integration. Use Value: NTC-based thermal monitoring and SVID-reported IMON data allow predictive thermal management and runtime power budgeting. |
| Laptop DDR3 Memory Regulation | Workstation Graphics Memory Supply |
Use Scenario: Delivering tightly regulated 1.35 V to DDR3L memory in thin-and-light notebooks with aggressive power gating. IC Role / Device Role / Timing Role: VR12 controller executing rapid PS2→PS0 wake-up with synchronized phase activation and PGOOD assertion. Use Value: Adaptive body diode conduction time reduction minimizes shoot-through losses during low-duty-cycle operation. |
Use Scenario: High-current VDDQ supply for GDDR6 memory on AI accelerator cards with strict EMI and thermal constraints. IC Role / Device Role / Timing Role: Three-phase controller using DCR sensing and differential remote sensing to maintain <±10 mV regulation at 60 A. Use Value: Programmable switching frequency (200–500 kHz) allows EMI tuning to avoid critical bands in dense PCB layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multiphase VR12 controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6353IRTZ | Wider operating temperature range (−40°C to +85°C vs. 0°C to +70°C); identical pinout, functionality, and electrical specs. | Required for industrial or extended-temperature server/storage platforms; not suitable for cost-sensitive commercial laptops. | Select ISL6353IRTZ when ambient operating temperature exceeds 70°C or JEDEC Class B reliability is mandated. |
| IR35201MTRPBF | Single-chip 3-phase VR12 controller with integrated MOSFET drivers; supports same SVID protocol but uses different R3 implementation and lacks PSI/VSET hardware override pins. | Used in high-density motherboards where board space is constrained; requires different layout for gate drive routing and current sensing. | Choose IR35201MTRPBF only if footprint reduction is prioritized over hardware configurability and thermal alert flexibility. |
Compared with ISL6353IRTZ, the ISL6353CRTZ-TK trades extended temperature support for lower cost and qualification scope; compared with IR35201MTRPBF, it offers superior hardware control granularity and thermal monitoring fidelity at the expense of slightly larger layout area.
Availability
ISL6353CRTZ-TK is available at Aetrix Electronics and suitable for DDR memory power delivery, server memory subsystems, and laptop DDR3L regulation requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for ISL6353CRTZ-TK 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 acquired Intersil in 2017 and maintains full technical and manufacturing continuity for the ISL6353 product line. Renesas is a global semiconductor leader focused on embedded processing, analog, power, and connectivity solutions.
The ISL6353 belongs to Renesas' VR12-compliant multiphase controller family, designed specifically for high-efficiency, low-noise DDR memory power systems in servers, workstations, and high-performance computing platforms.
FAQ
What is the operating temperature range for the ISL6353CRTZ-TK?
The ISL6353CRTZ-TK is rated for 0°C to +70°C ambient operation, with a maximum junction temperature of +125°C. This commercial-grade specification makes it suitable for desktop PCs, laptops, and enterprise storage controllers where ambient conditions remain within this envelope. The ISL6353CRTZ-TK datasheet specifies thermal resistance θJA = 32°C/W and θJC = 3°C/W for thermal design validation.
Does the ISL6353CRTZ-TK support both DCR and resistor-based current sensing?
Yes, the ISL6353CRTZ-TK supports dual current sensing methods: lossless inductor DCR sensing with single NTC thermistor compensation for temperature drift correction, and precision shunt resistor sensing. The ISEN1–ISEN3 pins accept either signal type, and configuration is handled internally without external op-amps or calibration circuitry - enabling flexible BOM optimization per design requirement.
How does the R3 modulator in the ISL6353CRTZ-TK improve transient response?
The ISL6353CRTZ-TK's Robust Ripple Regulator™ (R3) modulator improves transient response by dynamically increasing switching frequency during load steps - detected via COMP voltage rise - while maintaining fixed-frequency stability at steady state. This yields <20 µs recovery from 26 A load transients, as verified in Figure 1 of the FN6897 datasheet, without sacrificing light-load efficiency.
Can the ISL6353CRTZ-TK operate in single-phase mode?
Yes, the ISL6353CRTZ-TK is fully programmable for 1-, 2-, or 3-phase operation via SVID commands or hardware pins (ISEN2, PWM3). Pulling ISEN2 to 5 V disables Phase 2; pulling PWM3 to 5 V disables Phase 3. This allows seamless transition into single-phase PS2 mode for ultra-low-power states while retaining full regulation accuracy and protection coverage.
What protection features are integrated into the ISL6353CRTZ-TK?
The ISL6353CRTZ-TK integrates overvoltage protection (OVP at 145–200 mV above setpoint), overcurrent protection (OCP/WOC with state-dependent thresholds), overtemperature alert (VR_HOT#), power-good signaling (PGOOD), current imbalance detection (20 mV threshold), and fault latching via OVP pin. All protections operate independently of SVID communication, ensuring fail-safe behavior during bus faults or CPU reset.
ISL6353CRTZ-TK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 40-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Controller, DDR, Intel VR12
- Voltage - Input:
- 4.5V ~ 25V
- Number of Outputs:
- 1
- Voltage - Output:
- 0.25V ~ 1.52V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-TQFN (5x5)
ISL6353CRTZ-TK FAQ
1.How can I place an order for ISL6353CRTZ-TK through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6353CRTZ-TK 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 ISL6353CRTZ-TK reliable?
The price and inventory of ISL6353CRTZ-TK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6353CRTZ-TK is usually 5 days.
3.What payment methods are accepted for ISL6353CRTZ-TK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6353CRTZ-TK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6353CRTZ-TK?
ISL6353CRTZ-TK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6353CRTZ-TK 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 ISL6353CRTZ-TK?
For technical support, including ISL6353CRTZ-TK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6353CRTZ-TK requirements.
6.How does Aetrix verify that ISL6353CRTZ-TK is sourced from the original manufacturer or authorized distributors?
All ISL6353CRTZ-TK 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 ISL6353CRTZ-TK meets industry standards.
7.What is the process for return or replacement of ISL6353CRTZ-TK?
All ISL6353CRTZ-TK units undergo pre-shipment inspection (PSI). If there is an issue with ISL6353CRTZ-TK, 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 ISL6353CRTZ-TK part is unused and in its original packaging.
Return procedure for ISL6353CRTZ-TK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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