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Renesas ISL6532ACRZ-TK
- Part No.:
- ISL6532ACRZ-TK
- Manufacturer:
- Renesas
- Category:
- Power Management - Specialized
- Package:
- 28-VQFN Exposed Pad
- Datasheet:
-
ISL6532ACRZ-TK.pdf
- Description:
- IC REG/CTRLR ACPI DUAL DDR 28QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,986
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Product details
Overview
ISL6532ACRZ-TK from Renesas (formerly Intersil) is an ACPI-compliant dual-channel DDR/DDR2 memory power controller integrating a synchronous buck PWM controller, a 3A sink-source VTT linear regulator, and an LDO for AGP core voltage. It delivers ±2% output regulation over line/load/temperature, supports 0.8V–2.5V adjustable VDDQ, operates at 250kHz, and enables glitch-free S0/S3 state transitions in ATX-based systems.
For engineers reviewing the ISL6532ACRZ-TK datasheet, ISL6532ACRZ-TK pinout, ISL6532ACRZ-TK application, or ISL6532ACRZ-TK equivalent, key selection considerations include its triple-regulator architecture (VDDQ PWM + VTT sink-source + AGP LDO), integrated NCH backfeed control, 28-pin 6×6 QFN package, and support for 5VSBY/12VATX input rails in ACPI-compliant memory subsystems.
Technical Context
The ISL6532ACRZ-TK implements a voltage-mode PWM control loop with 250kHz fixed-frequency operation, 80dB DC gain, and 15MHz gain-bandwidth product for fast transient response on the VDDQ rail. Its internal 0.8V reference feeds both the VDDQ error amplifier and the VTT/VREF divider network, ensuring tight tracking between VDDQ and VTT = VDDQ/2.
ACPI state management is hardware-driven via dedicated S3# and S5# inputs, with synchronized NCH gate control to block backfeed during sleep states. The device integrates soft-start logic (6.5–10ms), overcurrent protection using rDS(ON)-based sensing, and independent UV/OV monitoring on all three regulated outputs (VDDQ, VTT, VAGP).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDDQ Output Range | Adjustable down to 0.8V via external resistor divider - supports DDR (2.5V) and DDR2 (1.8V) core voltage specs. |
| PWM Switching Frequency | 250kHz (typical) - enables compact magnetics and predictable EMI profile for memory power stages. |
| VTT Regulation Accuracy | ±2% over line/load/temperature - ensures stable DDR termination matching VDDQ/2 with <±15mV drift. |
| VTT Sink/Source Capability | ±3A peak load current - handles dynamic DDR I/O bus switching without external boost circuitry. |
| Standby LDO Output | 650mA max (5VSBY input) - sustains VDDQ during S3 sleep state without requiring main ATX 12V rail. |
| Thermal Shutdown Threshold | 140°C (nominal) - disables all regulators until junction cools to 110°C, preventing thermal runaway in high-density DIMM slots. |
| PGOOD Assertion Logic | Open-drain output active only in S0/S1 - asserts low if any regulator deviates >±15% from target or enters fault condition. |
Pinout & Package
ISL6532ACRZ-TK is housed in a RoHS-compliant, Pb-free 28-lead QFN package (6mm × 6mm, JEDEC MO-220 compliant) with exposed thermal pad. The package enables high PCB density and efficient heat dissipation in memory VRM layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| UGATE (26), LGATE (27) | Synchronous buck gate drivers | Drive N-channel MOSFETs with ±0.8A peak current - eliminates need for external gate drivers in VDDQ stage. |
| VDDQ (7,8,9) | VDDQ rail interface | Multi-pin connection for low-impedance VDDQ routing - serves as input to VTT regulator in S0/S1, output from standby LDO in S3. |
| VTT (5,6), VTTSNS (10) | VTT regulation feedback path | Dual VTT pins reduce IR drop; VTTSNS connects directly to VTT net at point-of-load for accurate closed-loop control. |
| NCH (22) | Backfeed blocking control | Open-drain output enabling external MOSFET to isolate VDDQ from input rail during S3/S4/S5 - prevents reverse current flow. |
| S3# (23), S5# (24) | ACPI sleep state inputs | Direct hardware interface to chipset SLP_S3#/SLP_S5# signals - triggers automatic regulator reconfiguration without firmware intervention. |
| PGOOD (21) | System power-good indicator | Signals host controller when all three regulated outputs (VDDQ, VTT, VAGP) are within ±15% tolerance - required for BIOS POST sequencing. |
Key Features
| Feature | Design Value |
|---|---|
| Triple-output ACPI power management | Integrates VDDQ buck, VTT sink-source, and AGP LDO in single IC - reduces BOM count and layout complexity vs. discrete solutions. |
| VDDQ/VTT voltage tracking | VREF_OUT provides buffered VDDQ/2 reference - ensures VTT remains precisely half of VDDQ across temperature and load, meeting DDR termination spec. |
| Glitch-free S0↔S3 transition | Internal state machine synchronizes PWM disable, standby LDO enable, and NCH activation - eliminates VDDQ droop or VTT float during sleep entry. |
| rDS(ON)-based overcurrent protection | Eliminates sense resistor in high-side path - preserves efficiency and reduces cost while providing accurate peak-current limiting for VDDQ converter. |
| Integrated soft-start timing | Fixed 6.5–10ms ramp for VDDQ, VTT, and VAGP - prevents inrush current damage to capacitors and avoids false PGOOD assertion during cold start. |
Applications
| Desktop DDR2 Memory Power | Graphics Card Memory VRM |
|---|---|
Use Scenario: Dual-channel DDR2 memory subsystem in ATX desktop motherboard with ACPI S3 suspend/resume. IC Role / Device Role / Timing Role: Primary power controller managing VDDQ, VTT, and VAGP rails under direct SLP_S3#/SLP_S5# command from southbridge. Use Value: Enables zero-software latency sleep/wake transitions with guaranteed VDDQ retention and VTT re-establishment within 8.2ms. |
Use Scenario: GDDR3/GDDR4 memory power on PCIe graphics card requiring independent VDDQ and VTT regulation. IC Role / Device Role / Timing Role: Regulator controller sourcing VDDQ from 12VATX and generating VTT from VDDQ/2 with precise tracking. Use Value: Delivers ±3A VTT sink/source capability without external op-amps or discrete regulators - simplifies GPU board layout and thermal design. |
| Embedded DDR Memory Supply | ASIC Memory Interface Power |
Use Scenario: Industrial embedded system with DDR memory operating in extended temperature range (-40°C to +85°C). IC Role / Device Role / Timing Role: Memory power IC supporting wide-input (5VSBY or 3.3VSBY) and maintaining ±2% regulation across full temp range. Use Value: Eliminates need for external temperature compensation circuitry - meets JEDEC DDR2 spec stability requirements out-of-box. |
Use Scenario: ASIC-based communications platform with DDR memory interface requiring strict VDDQ/VTT tracking and fast transient response. IC Role / Device Role / Timing Role: Core memory power controller delivering 250kHz PWM with 15MHz GBWP to handle bursty memory access patterns. Use Value: Achieves <10µs recovery from 50% load step on VDDQ - prevents timing violations during high-bandwidth data transfers. |
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 |
|---|---|---|---|
| ISL6532AIRZ | Wider industrial temp range (-40°C to +85°C) vs. ISL6532ACRZ-TK (0°C to +70°C); identical pinout, electrical specs, and functionality. | Required for designs operating outside commercial temperature envelope - e.g., industrial PCs, ruggedized graphics cards. | Select ISL6532AIRZ when ambient operating temperature exceeds +70°C or falls below 0°C; otherwise ISL6532ACRZ-TK is optimal for cost-sensitive commercial systems. |
| RT8120BZQW | Single-channel DDR3/DDR4 controller with integrated MOSFET drivers; lacks VTT sink-source capability and AGP LDO; uses different sleep-state signaling. | Targets newer DDR3/DDR4 memory but does not support dual-channel DDR2 or ACPI-compliant S3 state with VTT retention. | Choose RT8120BZQW only for DDR3/DDR4 designs where VTT generation is handled externally or omitted; not a functional replacement for ISL6532ACRZ-TK in legacy DDR2 systems. |
Compared with ISL6532AIRZ, the ISL6532ACRZ-TK offers identical performance at lower cost for commercial-temperature applications, while RT8120BZQW serves a different memory generation and lacks critical VTT regulation - making ISL6532ACRZ-TK irreplaceable in dual-channel DDR2 ACPI platforms requiring integrated VTT sink-source and AGP LDO.
Availability
ISL6532ACRZ-TK is available at Aetrix Electronics and suitable for desktop motherboards, graphics cards, embedded DDR2 systems, and ASIC memory interfaces requiring stable component supply and long-term lifecycle support.
Supply support for ISL6532ACRZ-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 support and manufacturing continuity for legacy Intersil power management products including the ISL6532A family.
The ISL6532A product line was designed specifically for ACPI-compliant DDR/DDR2 memory power systems in PC and graphics platforms, emphasizing seamless S0/S3 state transitions, integrated VTT regulation, and minimal external component count.
FAQ
What is the primary function of the ISL6532ACRZ-TK in a DDR memory system?
The ISL6532ACRZ-TK serves as a complete ACPI-compliant power controller for dual-channel DDR/DDR2 memory, generating three regulated voltages: VDDQ (via synchronous buck), VTT (via integrated sink-source linear regulator), and VAGP (via LDO). It manages seamless transitions between S0 (active) and S3 (suspend) states using dedicated S3#/S5# inputs and internal NCH control, ensuring memory power integrity without firmware involvement. This makes ISL6532ACRZ-TK essential for reliable DDR2 memory operation in ATX-based systems.
Does the ISL6532ACRZ-TK support DDR2 memory specifications?
Yes, the ISL6532ACRZ-TK explicitly supports DDR2 memory specifications through its fully adjustable VDDQ output (down to 0.8V), precise VTT = VDDQ/2 tracking, and ±2% regulation tolerance over line, load, and temperature. Its 250kHz PWM frequency, fast transient response, and integrated soft-start meet JEDEC DDR2 power delivery requirements for VDDQ and VTT rails. The ISL6532ACRZ-TK datasheet confirms compatibility with dual-channel DDR2 systems up to 4 DIMMs, confirming its design alignment with DDR2 timing and voltage stability needs.
How does the ISL6532ACRZ-TK handle overcurrent protection on the VDDQ rail?
The ISL6532ACRZ-TK implements rDS(ON)-based overcurrent protection on the VDDQ synchronous buck converter, using an internal 20µA current source (OCSET pin) and an external resistor (ROCSET) to set the trip threshold. When the voltage drop across the upper MOSFET exceeds the ROCSET voltage, the device initiates hiccup-mode soft-start recovery - disabling all regulators for three soft-start cycles before attempting restart. This method avoids external sense resistors, preserving efficiency while providing accurate peak-current limiting. The ISL6532ACRZ-TK's protection logic ensures robust fault handling without compromising DDR2 memory reliability.
What is the role of the NCH pin on the ISL6532ACRZ-TK?
The NCH pin on the ISL6532ACRZ-TK is an open-drain output that controls an external N-channel MOSFET to block backfeed current from the VDDQ rail to the input supply during S3/S4/S5 sleep states. When S3# goes low, NCH pulls low to turn off the blocking FET, isolating VDDQ from the 12VATX rail. During S0/S1, NCH floats high-impedance to allow normal operation. The ISL6532ACRZ-TK requires an external pull-up resistor (≥2kΩ) to 12V on NCH, and its 9.5V nominal trip level ensures reliable activation after 12VATX stabilization - a critical feature for ACPI-compliant power sequencing in ISL6532ACRZ-TK designs.
Can the ISL6532ACRZ-TK operate with a 3.3V standby input instead of 5VSBY?
Yes, the ISL6532ACRZ-TK supports both 5VSBY and 3.3VSBY inputs for its standby LDO, though performance differs: with 5VSBY, the standby LDO delivers up to 650mA to VDDQ in S3 state; with 3.3VSBY, maximum output drops to 550mA. The datasheet specifies that 5VSBY is recommended due to higher current capability and better regulation margin. All other functions - including PWM operation, VTT regulation, and ACPI state logic - remain fully operational regardless of standby rail choice, making ISL6532ACRZ-TK flexible for diverse ATX power supply configurations.
ISL6532ACRZ-TK 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)
ISL6532ACRZ-TK FAQ
1.How can I place an order for ISL6532ACRZ-TK through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6532ACRZ-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 ISL6532ACRZ-TK reliable?
The price and inventory of ISL6532ACRZ-TK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6532ACRZ-TK is usually 5 days.
3.What payment methods are accepted for ISL6532ACRZ-TK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6532ACRZ-TK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6532ACRZ-TK?
ISL6532ACRZ-TK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6532ACRZ-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 ISL6532ACRZ-TK?
For technical support, including ISL6532ACRZ-TK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6532ACRZ-TK requirements.
6.How does Aetrix verify that ISL6532ACRZ-TK is sourced from the original manufacturer or authorized distributors?
All ISL6532ACRZ-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 ISL6532ACRZ-TK meets industry standards.
7.What is the process for return or replacement of ISL6532ACRZ-TK?
All ISL6532ACRZ-TK units undergo pre-shipment inspection (PSI). If there is an issue with ISL6532ACRZ-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 ISL6532ACRZ-TK part is unused and in its original packaging.
Return procedure for ISL6532ACRZ-TK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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