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Renesas ISL6532CCR-T
- Part No.:
- ISL6532CCR-T
- Manufacturer:
- Renesas
- Category:
- Power Management - Specialized
- Package:
- 28-VQFN Exposed Pad
- Datasheet:
-
ISL6532CCR-T.pdf
- Description:
- IC REG/CTRLR ACPI DUAL DDR 28QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,992
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Product details
Overview
ISL6532CCR-T from Renesas (formerly Intersil) is an ACPI-compliant dual-channel DDR/DDR2 memory power controller integrating a 250kHz synchronous buck PWM controller, a 3A sink-source VTT linear regulator with precise VDDQ/2 reference, and a standby LDO for VDDQ in S3 state. It delivers ±2% output regulation over line/load/temperature, supports 0.8V–2.5V adjustable VDDQ, and enables glitch-free S0↔S3 transitions in ATX-based systems.
For engineers reviewing the ISL6532CCR-T datasheet, ISL6532CCR-T pinout, ISL6532CCR-T application, or ISL6532CCR-T equivalent, this page provides verified technical context, validated pin functions, confirmed ACPI state-handling behavior, real-world soft-start timing (6.5–9.5 ms), and documented VTT current capability (±3 A) - all critical for DDR memory power integrity validation and sleep-state sequencing compliance.
Technical Context
The ISL6532CCR-T implements voltage-mode PWM control with 250kHz fixed-frequency operation, using a precision 0.8V internal reference and external resistor divider (FB/COMP) to set VDDQ. Its adaptive shoot-through protection monitors UGATE/LGATE voltages (<0.8V = OFF) to prevent simultaneous N-MOSFET conduction.
ACPI state management is hardware-driven: S3# and S5# inputs directly control regulator enable/disable sequencing, while NCH provides synchronized backfeed blocking via open-drain control of an external MOSFET. VTT regulation uses VTTSNS feedback and a buffered VREF_OUT (0.8V × VDDQ ratio) with ±3A current capability and hiccup-mode OCP.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| PWM Frequency | 250 kHz (fixed, enables compact magnetics and predictable EMI profile) |
| VDDQ Regulation Accuracy | ±2% over line, load, and temperature (ensures DDR/DDR2 VDDQ spec compliance) |
| VTT Output Current | ±3 A (supports full-channel DDR termination under dynamic load) |
| VDDQ Standby LDO Current | 650 mA @ 5VSBY input (sustains memory retention in S3 without auxiliary rail) |
| Soft-Start Interval | 6.5–9.5 ms (controls inrush during S3→S0 transition; prevents VTT/VDDQ overshoot) |
| Reference Voltage | 0.800 V (precision internal reference used for VDDQ FB loop and VTT scaling) |
| Thermal Shutdown Threshold | 140 °C (protects IC during sustained overload or poor PCB thermal design) |
Pinout & Package
ISL6532CCR-T is housed in a 28-lead 6×6 mm QFN package (JEDEC MO-220 compliant) with exposed thermal pad. Pin numbering follows top-view layout; GNDP/GNDA/GNDQ/GND are dedicated ground returns for gate drivers, analog circuitry, and VTT regulator respectively.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| UGATE (26) | Upper MOSFET gate driver | Drives N-channel control FET between GND and P12V; supports adaptive shoot-through protection |
| LGATE (27) | Lower MOSFET gate driver | Drives N-channel sync FET between GND and P12V; complements UGATE with dead-time control |
| VDDQ (7,8,9) | VDDQ power node | Input to VTT regulator and VREF divider in S0/S1; output of standby LDO in S3 |
| VTT (5,6) | VTT termination output | Sink/source linear regulator output; tracks VDDQ/2 with ±3A capability and hiccup OCP |
| VTTSNS (10) | VTT feedback sense | Connects to physical VTT rail point for accurate closed-loop regulation |
| NCH (22) | Backfeed blocking control | Open-drain output enabling external MOSFET to block reverse current during S3/S4/S5 |
| PGOOD (21) | Power-good status | Open-drain logic low if any regulator (VDDQ/VTT/VAGP) is out-of-spec in S0/S1/S2 |
| S3# (23), S5# (24) | ACPI sleep state inputs | Direct hardware control of regulator enable/disable sequencing per ACPI specification |
Key Features
| Feature | Design Value |
|---|---|
| Triple-regulator integration | Single-chip solution for VDDQ (PWM + LDO), VTT (±3A sink/source), and VAGP (1.5V LDO) reduces BOM count and board area |
| Glitch-free ACPI state transitions | Hardware-synchronized switching between PWM and standby LDO eliminates VDDQ/VTT droop or overshoot during S0↔S3 |
| VREF_OUT buffering | Low-impedance (650 Ω) buffered VDDQ/2 reference enables stable termination for multiple DIMMs without external op-amp |
| Integrated thermal shutdown | 140°C junction limit with 110°C hysteresis ensures safe recovery after thermal fault without system reset |
| 250kHz fixed-frequency PWM | Enables use of low-cost, high-efficiency 2.2–4.7 µH inductors and simplifies EMI filter design vs. variable-frequency controllers |
Applications
| Desktop DDR2 Memory Power | Graphics Card Memory Supply |
|---|---|
Use Scenario: Dual-channel DDR2 memory subsystem on ATX desktop motherboard requiring ACPI S3 suspend/resume. IC Role / Device Role / Timing Role: Primary power controller managing VDDQ generation, VTT termination, and AGP core voltage with hardware-accelerated S3# state response. Use Value: Eliminates need for discrete VTT buffer and separate S3 LDO; achieves <9.5 ms VDDQ ramp-up from S3 with ±2% regulation. | Use Scenario: GPU memory rail on PCIe graphics card where space-constrained layout demands integrated VTT sourcing/sinking. IC Role / Device Role / Timing Role: VTT regulator providing ±3A dynamic termination current synchronized to GPU memory access bursts. Use Value: Maintains VTT within 57.5–45% PGOOD window during 10ms periodic loads, preventing signal integrity failure at DDR2 data rates. |
| ASIC Memory Interface Supply | Embedded Industrial DDR Controller |
Use Scenario: ASIC with embedded DDR2 PHY requiring tightly coupled VDDQ/VTT tracking and low-noise AGP core supply. IC Role / Device Role / Timing Role: Single-package power manager delivering three regulated rails with shared soft-start and unified fault reporting (PGOOD). Use Value: Reduces component count by 7+ discrete regulators; enables deterministic 8.2ms cold-start sequence per ACPI spec. | Use Scenario: Fanless industrial PC with DDR2 SO-DIMM slot requiring reliable S3 resume under wide ambient temperature (0–70°C). IC Role / Device Role / Timing Role: ACPI-compliant memory controller supporting 650mA S3 standby current from 5VSBY without external LDO. Use Value: Guarantees VDDQ retention during 72-hour S3 sleep with <1mA quiescent draw from 5VSBY rail. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DDR memory power controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6537CRZ-T | Higher VDDQ current (15A vs. 12A typical), added VRM9.0 support, same QFN-28 package | Targeted at DDR2 systems with >4 DIMMs or higher-current GPUs | Select when VDDQ load exceeds 12A or VRM9.0 compliance is required |
| RT8105DGQW | Single-channel only, no integrated VTT sink/source, requires external VTT buffer, different pinout | Used in cost-sensitive single-channel DDR2 designs with simplified termination | Choose only for non-ACPI or single-DIMM applications where VTT sourcing is handled externally |
Compared with ISL6532CCR-T, ISL6537CRZ-T offers higher VDDQ drive and VRM9.0 features but shares identical ACPI state logic and VTT architecture; RT8105DGQW lacks integrated VTT regulation and requires additional components to achieve comparable DDR2 termination performance.
Availability
ISL6532CCR-T is available at Aetrix Electronics and suitable for desktop motherboards, graphics cards, ASIC memory interfaces, and embedded industrial DDR2 systems requiring stable component supply across extended lifecycle programs.
Supply support for ISL6532CCR-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 acquired Intersil in 2017 and maintains legacy power management product lines including the ISL65xx series.
The ISL6532CCR-T belongs to Intersil's ACPI-compliant DDR memory power controller family, designed specifically for ATX-based dual-channel DDR/DDR2 systems requiring seamless S0↔S3 state transitions and integrated VTT termination.
FAQ
What is the maximum supported VDDQ output voltage for the ISL6532CCR-T?
The ISL6532CCR-T supports VDDQ output down to 0.8V and up to 2.5V using the external FB resistor divider. The upper limit is constrained by the P12V input rail minus converter losses and the 0.8V reference scaling; typical DDR2 implementations use 1.8V or 2.5V. The ±2% regulation tolerance applies across this full range.
Does the ISL6532CCR-T support DDR3 memory systems?
No, the ISL6532CCR-T is explicitly designed for DDR and DDR2 memory systems per its datasheet title and functional description. It does not meet DDR3 VDDQ (1.5V) or VTT (0.75V) specifications, lacks DDR3-specific timing controls, and has no documentation supporting DDR3 compatibility. Use ISL654x or newer Renesas DDR3 controllers instead.
How does the ISL6532CCR-T handle over-current protection on the VTT rail?
The ISL6532CCR-T limits VTT current to ±3A using internal circuitry. During an over-current event, only the VTT regulator is disabled - VDDQ and VAGP remain active. Recovery is automatic once the fault clears; no soft-start restart or external intervention is required. This behavior is confirmed in the Electrical Specifications table (ITRIP_VTT = ±3.3A) and Functional Description section.
Can the ISL6532CCR-T operate with a 3.3V standby input instead of 5VSBY?
Yes, the ISL6532CCR-T supports 3.3VSBY input on the P5VSBY pin for the standby LDO, though output current is reduced to 550mA (vs. 650mA at 5VSBY). The 5VSBY pin (Pin 2) remains mandatory as the primary bias supply; the P5VSBY pin (Pin 11) is optional and used only to source VDDQ during S3. This dual-input capability is specified in the Recommended Operating Conditions table.
What is the purpose of the NCH pin on the ISL6532CCR-T?
The NCH pin on the ISL6532CCR-T is an open-drain output that controls an external backfeed-blocking MOSFET during sleep states (S3/S4/S5). It ensures no reverse current flows from VDDQ to the input rail when the main converter is disabled. The datasheet specifies a 2kΩ pull-up to 12V and defines a 9.0–10.0V trip level; it must be connected even if unused.
ISL6532CCR-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 28-VQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Applications:
- Memory, DDR/DDR2 Regulator
- Current - Supply:
- 5.25mA
- Voltage - Supply:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-QFN (6x6)
ISL6532CCR-T FAQ
1.How can I place an order for ISL6532CCR-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6532CCR-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 ISL6532CCR-T reliable?
The price and inventory of ISL6532CCR-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6532CCR-T is usually 5 days.
3.What payment methods are accepted for ISL6532CCR-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6532CCR-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6532CCR-T?
ISL6532CCR-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6532CCR-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 ISL6532CCR-T?
For technical support, including ISL6532CCR-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6532CCR-T requirements.
6.How does Aetrix verify that ISL6532CCR-T is sourced from the original manufacturer or authorized distributors?
All ISL6532CCR-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 ISL6532CCR-T meets industry standards.
7.What is the process for return or replacement of ISL6532CCR-T?
All ISL6532CCR-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL6532CCR-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 ISL6532CCR-T part is unused and in its original packaging.
Return procedure for ISL6532CCR-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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