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Renesas ISL6537CRZA-TR5160
- Part No.:
- ISL6537CRZA-TR5160
- Manufacturer:
- Renesas
- Category:
- Power Management - Specialized
- Package:
- 28-VQFN Exposed Pad
- Datasheet:
-
ISL6537CRZA-TR5160.pdf
- Description:
- IC REG/CTRLR ACPI DUAL DDR 28QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,500
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Product details
Overview
ISL6537CRZA-TR5160 from Renesas (formerly Intersil) is a fully integrated ACPI-compliant power controller for dual-channel DDR/DDR2 memory systems, delivering four regulated voltages: synchronous buck-regulated VDDQ (0.8V to 1.8V), ±3A sink-source VTT at VDDQ/2, GMCH core LDO, and GMCH/CPU VTT LDO. It supports S0/S1/S3 states with glitch-free transitions and operates in ATX-based desktop and graphics platforms.
For engineers reviewing the ISL6537CRZA-TR5160 datasheet, ISL6537CRZA-TR5160 pinout, ISL6537CRZA-TR5160 application, or ISL6537CRZA-TR5160 equivalent, key selection criteria include its 250kHz voltage-mode PWM control, integrated adaptive shoot-through protection, ±2% output regulation over temperature, VREF_OUT buffered reference, and VIDPGD status signaling for GMCH/CPU VTT compliance.
Technical Context
The ISL6537CRZA-TR5160 implements a single-loop voltage-mode PWM architecture driving N-channel MOSFETs in a synchronous buck topology for VDDQ, with fast transient response and 220–280kHz adjustable switching frequency. Its internal error amplifiers (80dB DC gain, 15MHz GBWP) support tight regulation across all four outputs.
ACPI state management is hardware-driven via dedicated S3# and S5# inputs, enabling precise sequencing of regulator enable/disable during S0↔S3↔S5 transitions. Thermal shutdown triggers at 140°C, and overcurrent protection uses rDS(ON)-based sensing with programmable trip via OCSET pin and external resistor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| PWM Frequency | 250 kHz nominal; enables compact magnetics and predictable EMI profile for DDR memory power delivery. |
| VDDQ Output Range | Adjustable down to 0.8V using external resistor divider; supports DDR (2.5V) and DDR2 (1.8V) VDDQ specifications. |
| VTT Current Capability | ±3 A continuous sink/source for DDR VTT; eliminates need for negative supply while maintaining VDDQ/2 accuracy. |
| Reference Voltage | 0.800 V ±2% system accuracy; serves as precision基准 for all regulated outputs including VTT and GMCH LDOs. |
| Operating Temperature | 0°C to +70°C ambient; validated for commercial PC and graphics card environments with junction limit at +125°C. |
| Protection Features | UV/OV monitoring on all outputs, OCP on VDDQ PWM stage, thermal shutdown at 140°C, and adaptive shoot-through prevention. |
| Package | 28-pin 6×6 mm QFN with exposed thermal pad; optimized for high-current PCB layout and thermal dissipation. |
Pinout & Package
ISL6537CRZA-TR5160 is housed in a 28-lead 6×6 mm QFN package (PKG DWG # L28.6x6) with an exposed thermal pad requiring low-inductance ground connection. Pin functions are validated per FN9142 Rev 6.00 datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| UGATE (26) | Upper MOSFET gate driver output | Provides PWM-controlled high-side drive; monitored for adaptive shoot-through protection - no external components allowed. |
| LGATE (28) | Lower MOSFET gate driver output | Provides PWM-controlled low-side drive; monitored for adaptive shoot-through protection - no external components allowed. |
| FB (15) | VDDQ feedback input | Negative input to error amplifier; sets VDDQ output voltage via external resistor divider; also monitors UV/OV faults. |
| VREF_OUT (13) | Buffered VDDQ/2 reference output | Supplies stable, low-impedance VREF for DDR termination; requires ≥0.1 µF bypass to VDDQ and GND. |
| VIDPGD (12) | GMCH/CPU VTT status indicator | Open-drain logic output pulled low if VTT_GMCH/CPU is out-of-regulation in S0/S1 - used for system fault reporting. |
| OCSET (22) | Overcurrent threshold programming | Connects to external resistor (ROCSET) to set VDDQ current limit based on MOSFET rDS(ON); enables hiccup-mode protection. |
| S3# (2), S5# (23) | ACPI sleep-state inputs | Dedicated TTL-compatible inputs that directly control regulator enable/disable sequencing per ACPI S3/S5 definitions. |
Key Features
| Feature | Design Value |
|---|---|
| Four-output integration | Combines VDDQ buck controller, DDR VTT sink-source LDO, GMCH core LDO, and GMCH/CPU VTT LDO - reduces BOM count and board space vs discrete solutions. |
| ACPI-compliant state control | Hardware-managed S0/S1/S3 transitions with built-in soft-start sequencing and glitch-free rail enable/disable - eliminates firmware dependency for power sequencing. |
| VDDQ/2 precision reference | VREF_OUT provides buffered, low-noise VDDQ/2 tracking with ±2% accuracy - ensures DDR termination compliance without external op-amps or dividers. |
| rDS(ON)-based OCP | Eliminates sense resistor in high-current VDDQ path - improves efficiency, reduces cost, and avoids parasitic losses in current-sense network. |
| Adaptive shoot-through protection | Monitors UGATE/LGATE voltages in real time to prevent simultaneous conduction - enables robust operation with logic-level N-MOSFETs without timing margining. |
Applications
| Desktop Memory Power | Graphics Card Memory Supply |
|---|---|
|
Use Scenario: Dual-channel DDR2 memory subsystem in ATX desktop motherboard with ACPI S3/S5 sleep support. IC Role / Device Role / Timing Role: Primary power controller managing VDDQ, DDR VTT, GMCH core, and CPU VTT rails with synchronized state transitions. Use Value: Enables full ACPI compliance with single-chip sequencing, eliminating discrete supervisors and reducing layout complexity for memory VRMs. |
Use Scenario: GPU memory power delivery on PCIe graphics cards requiring independent VDDQ and VTT regulation under dynamic load. IC Role / Device Role / Timing Role: Regulator/controller providing tightly coupled VDDQ and VTT rails with fast transient response and ±3A VTT sink/source capability. Use Value: Maintains DDR2 signal integrity during GPU burst loads by delivering accurate VDDQ/2 termination without external compensation networks. |
| ASIC Memory Interface Power | Embedded Processor I/O Supply |
|
Use Scenario: High-speed memory interface for networking ASICs where VDDQ and VTT must track within ±2% across temperature and load. IC Role / Device Role / Timing Role: Integrated power solution generating four regulated rails with shared reference and coordinated soft-start. Use Value: Ensures consistent timing margins and reduced jitter on memory buses by minimizing VDDQ–VTT tracking error through monolithic design. |
Use Scenario: I/O supply for embedded x86 or RISC processors requiring GMCH core and termination voltages in space-constrained industrial designs. IC Role / Device Role / Timing Role: Dual-LDO controller for GMCH core and GMCH/CPU VTT, with VIDPGD status reporting for system health monitoring. Use Value: Simplifies power architecture by consolidating three critical I/O rails into one IC with fault visibility via VIDPGD pin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-rail memory regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6522CRZ | Single-channel DDR memory controller; lacks GMCH core and CPU VTT LDOs; supports only VDDQ + VTT. | Applicable only for single-DIMM or non-GMCH systems; cannot replace ISL6537CRZA-TR5160 in dual-channel or chipset-integrated designs. | Select when system requires only basic DDR memory regulation without chipset core/termination support. |
| RT8802AGQW | Three-output controller (VDDQ, VTT, VREF); no GMCH core or CPU VTT regulation; different pinout and AC characteristics. | Used in newer DDR3/DDR4 platforms; lacks S3#/S5# direct ACPI interface and VIDPGD signaling. | Consider for cost-sensitive DDR3 designs where GMCH integration is handled externally or omitted. |
Compared with ISL6537CRZA-TR5160, ISL6522CRZ offers reduced integration for simpler memory-only applications, while RT8802AGQW targets later-generation DDR standards with different control architecture - neither provides full functional equivalence for dual-channel DDR2 systems with GMCH power requirements.
Availability
ISL6537CRZA-TR5160 is available at Aetrix Electronics and suitable for desktop motherboards, graphics cards, and embedded processor platforms requiring stable component supply for legacy DDR2 memory power architectures.
Supply support for ISL6537CRZA-TR5160 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 supply chain support for legacy Intersil power management ICs including the ISL6537 family.
The ISL6537 product line was designed specifically for ACPI-compliant dual-channel DDR/DDR2 memory power systems in desktop PCs and graphics cards, emphasizing integration, sequencing reliability, and thermal robustness.
FAQ
What is the primary function of the ISL6537CRZA-TR5160 in a DDR memory system?
The ISL6537CRZA-TR5160 serves as a complete ACPI-compliant power controller for dual-channel DDR/DDR2 memory systems. It generates four regulated voltages: VDDQ via synchronous buck converter, DDR VTT via integrated ±3A sink-source LDO referenced to VDDQ/2, GMCH core voltage, and GMCH/CPU VTT termination voltage. The ISL6537CRZA-TR5160 manages all state transitions (S0/S1/S3) with hardware-controlled sequencing and built-in protection features.
Does the ISL6537CRZA-TR5160 support DDR2-specific voltage requirements?
Yes, the ISL6537CRZA-TR5160 supports DDR2 specifications through its adjustable VDDQ output range (down to 0.8V), ±2% regulation tolerance over temperature, and precise VDDQ/2 tracking for VTT. Its 250kHz switching frequency, fast transient response, and integrated VREF_OUT buffer ensure stable operation under DDR2 timing and noise constraints. The ISL6537CRZA-TR5160 is explicitly qualified for dual-channel DDR2 memory power in ACPI-compliant PCs per FN9142 datasheet.
How does the ISL6537CRZA-TR5160 implement overcurrent protection without a sense resistor?
The ISL6537CRZA-TR5160 uses rDS(ON)-based overcurrent detection on the upper MOSFET, programmed via the OCSET pin and external ROCSET resistor. An internal 20µA current source develops a voltage across ROCSET, which is compared to the voltage drop across the MOSFET's channel. When exceeded, the ISL6537CRZA-TR5160 initiates hiccup-mode soft-start cycling. This method eliminates the power loss and layout sensitivity of a discrete current-sense resistor while maintaining accuracy across temperature.
What role does the VIDPGD pin play in system-level power management?
The VIDPGD pin on the ISL6537CRZA-TR5160 is an open-drain logic output indicating whether the GMCH/CPU VTT regulator is within specification during S0/S1/S2 states. It transitions low when VTT_GMCH/CPU falls outside its ±2.5% regulation window, providing direct hardware feedback to the platform controller hub or baseboard management controller. This enables real-time fault detection without software polling - a critical feature for reliable boot and runtime stability in the ISL6537CRZA-TR5160-based power architecture.
Can the ISL6537CRZA-TR5160 be used in new designs today?
Yes, the ISL6537CRZA-TR5160 remains viable for new designs targeting legacy DDR2 platforms, industrial embedded systems, or repair/refurbishment of existing ATX motherboards and graphics cards. Renesas continues to support the part with full datasheet documentation, application notes (e.g., AN1123), and traceable sourcing. While newer DDR3/DDR4 controllers exist, the ISL6537CRZA-TR5160 delivers proven performance, full ACPI compliance, and long-term supply assurance for DDR2-specific applications.
ISL6537CRZA-TR5160 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:
- 7mA
- Voltage - Supply:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-QFN (6x6)
ISL6537CRZA-TR5160 FAQ
1.How can I place an order for ISL6537CRZA-TR5160 through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6537CRZA-TR5160 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 ISL6537CRZA-TR5160 reliable?
The price and inventory of ISL6537CRZA-TR5160 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6537CRZA-TR5160 is usually 5 days.
3.What payment methods are accepted for ISL6537CRZA-TR5160?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6537CRZA-TR5160 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6537CRZA-TR5160?
ISL6537CRZA-TR5160 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6537CRZA-TR5160 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 ISL6537CRZA-TR5160?
For technical support, including ISL6537CRZA-TR5160 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6537CRZA-TR5160 requirements.
6.How does Aetrix verify that ISL6537CRZA-TR5160 is sourced from the original manufacturer or authorized distributors?
All ISL6537CRZA-TR5160 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 ISL6537CRZA-TR5160 meets industry standards.
7.What is the process for return or replacement of ISL6537CRZA-TR5160?
All ISL6537CRZA-TR5160 units undergo pre-shipment inspection (PSI). If there is an issue with ISL6537CRZA-TR5160, 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 ISL6537CRZA-TR5160 part is unused and in its original packaging.
Return procedure for ISL6537CRZA-TR5160:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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