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Renesas ISL6537ACRZ-TR5160
- Part No.:
- ISL6537ACRZ-TR5160
- Manufacturer:
- Renesas
- Category:
- Power Management - Specialized
- Package:
- 28-VQFN Exposed Pad
- Datasheet:
-
ISL6537ACRZ-TR5160.pdf
- Description:
- IC REG/CTRLR ACPI DUAL DDR 28QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,139
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Product details
Overview
ISL6537ACRZ-TR5160 from Renesas Electronics (formerly Intersil) is an ACPI-compliant dual-channel DDR/DDR2 memory power controller integrating five regulated outputs: synchronous buck PWM for VDDQ (0.8V–1.8V), 3A sink-source linear regulator for DDR VTT, PWM for GMCH core, LDO for CPU/GMCH VTT termination, and LDO for DAC. It delivers ±2% output regulation over temperature and supports glitch-free S0/S1/S3 state transitions in ATX-powered desktop and graphics systems.
For engineers reviewing the ISL6537ACRZ-TR5160 datasheet, ISL6537ACRZ-TR5160 pinout, ISL6537ACRZ-TR5160 application, or ISL6537ACRZ-TR5160 equivalent, key selection considerations include its 250kHz phase-shifted dual-PWM architecture, integrated adaptive shoot-through protection, VDDQ/2 buffered VREF_OUT, VIDPGD status signaling, and RoHS-compliant 28-pin 6×6 QFN package with exposed thermal pad.
Technical Context
The ISL6537ACRZ-TR5160 implements two independent 250kHz voltage-mode PWM controllers-one for DDR VDDQ (with UGATE/LGATE/PHASE/OCSET) and one for GMCH core (PWM4/FB4/COMP4)-phase-shifted by 180° to reduce input ripple. Its VDDQ regulator features adaptive shoot-through protection monitoring UGATE and LGATE voltages, while OCSET sets overcurrent trip via external resistor and MOSFET rDS(ON).
It integrates four regulation loops: VDDQ buck (FB/COMP), VTT linear (DDR_VTTSNS/VREF_IN/VREF_OUT), GMCH core buck (FB4/COMP4), and two LDO controllers (DRIVE2/FB2 and DRIVE3/FB3), all referenced to a precision 0.800V internal bandgap. Soft-start sequencing is digitally controlled across five regulators with staggered enable timing during S3→S0 transitions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Temp Range | 0°C to +70°C ambient - defines industrial-grade qualification for desktop and embedded PC use. |
| PWM Switching Frequency | 220–280 kHz (typ. 250 kHz) - enables compact magnetics and predictable EMI filtering design. |
| VDDQ Output Voltage Range | Adjustable down to 0.8V using external FB divider - supports DDR (2.5V) and DDR2 (1.8V) VDDQ specifications. |
| VTT Load Current Capability | ±3 A peak (30% duty cycle) - sufficient for dual-channel DDR2 termination with dynamic sink/source demand. |
| Output Voltage Accuracy | ±2% over line/load/temp - ensures stable memory interface timing margins under real-world conditions. |
| Thermal Shutdown Threshold | 140°C (nominal) with 30°C hysteresis - protects against sustained overload or poor PCB thermal design. |
| Package | 28-lead 6×6 mm QFN with exposed thermal pad - requires low-inductance GND paddle connection for thermal and noise performance. |
Pinout & Package
ISL6537ACRZ-TR5160 is housed in a 28-lead, 6 mm × 6 mm, 0.5 mm pitch QFN package (PKG DWG # L28.6x6) with an exposed thermal pad on the underside requiring direct solder connection to PCB ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| UGATE (26) | Upper MOSFET gate driver output | Drives N-channel high-side switch; monitored for adaptive shoot-through protection - no series components allowed. |
| LGATE (28) | Lower MOSFET gate driver output | Drives N-channel low-side switch; monitored for adaptive shoot-through protection - no series components allowed. |
| FB (15) | VDDQ feedback input | Negative input of VDDQ error amplifier; sets output voltage via external resistor divider - also enables UV/OV fault detection. |
| OCSET (22) | Overcurrent threshold programming | Connects to upper MOSFET drain via ROCSET; sets VDDQ current limit using internal 20 µA current source and rDS(ON). |
| VREF_OUT (13) | Buffered VDDQ/2 reference output | Provides low-impedance 0.8V-referenced VTT tracking signal - requires ≥0.1 µF bypass to VDDQ and GND. |
| VIDPGD (12) | GMCH/CPU VTT good-status indicator | Open-drain logic output pulled low if VTT_GMCH/CPU is out-of-regulation in S0/S1 - used for system-level power-good sequencing. |
Key Features
| Feature | Design Value |
|---|---|
| Five integrated regulated outputs | Reduces BOM count and layout complexity for full DDR memory subsystem: VDDQ, DDR VTT, GMCH core, CPU/GMCH VTT, DAC supply. |
| ACPI-compliant sleep-state control | Hardware-managed S0/S1/S3 transitions with sequenced soft-start and regulator enable/disable - eliminates need for external state logic. |
| Phase-shifted dual PWM controllers | 250kHz operation with 180° phase shift between VDDQ and GMCH core regulators - cuts input capacitor RMS current by ~30%. |
| Integrated VDDQ/2 reference buffer | VREF_OUT provides accurate, low-noise, high-current VTT reference without external op-amp or divider - improves DDR signal integrity. |
| Adaptive shoot-through protection | Monitors UGATE/LGATE voltages in real time to prevent simultaneous conduction - enables robust gate drive without external timing delays or dead-time circuits. |
Applications
| Desktop Memory Power | Graphics Card Memory Supply |
|---|---|
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, DDR VTT, GMCH core, and CPU VTT rails with synchronized state transitions. Use Value: Eliminates discrete regulators and sequencing ICs; achieves ±2% VDDQ regulation and glitch-free S3 wake-up within 8.2 ms soft-start interval. | Use Scenario: High-bandwidth GDDR3/GDDR5 memory power on discrete GPU board requiring tight VTT tracking and fast transient response. IC Role / Device Role / Timing Role: Supplies DDR VTT with ±3A sink/source capability and buffered VDDQ/2 reference to match memory I/O voltage swing. Use Value: Maintains VTT within 15mV of VDDQ/2 under dynamic load, reducing signal reflection and improving eye margin at 800+ MT/s data rates. |
| ASIC Memory Interface Power | Embedded Processor DDR Subsystem |
Use Scenario: ASIC-based storage controller with dual DDR2 channels requiring low-noise, tightly regulated termination. IC Role / Device Role / Timing Role: Generates VTT and VDDQ with integrated OCSET-based overcurrent protection and thermal shutdown. Use Value: Enables single-chip power solution with hiccup-mode fault recovery - avoids system reset during transient overloads. | Use Scenario: Industrial embedded PC with DDR2 SO-DIMM interface operating in extended temperature environments. IC Role / Device Role / Timing Role: Provides all five memory-related rails with 0°C to +70°C qualification and RoHS-compliant Pb-free packaging. Use Value: Supports long-lifecycle production with verified thermal pad soldering and MSL3 reflow compatibility per J-STD-020. |
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 | Same die, identical pinout and specs; differs only in tape-and-reel packaging (no -TR5160 suffix) and minor marking variation. | No functional difference; suitable for same designs and layouts. | Select ISL6537CRZ-T when standard reel quantity (e.g., 2500 pcs) is preferred over ISL6537ACRZ-TR5160's 5160-piece reel. |
| RT8205AZSP | Single-channel DDR3 VDDQ+VTT controller; lacks GMCH core PWM, CPU VTT LDO, DAC LDO, and SLP_S5 support - no ACPI S5 compliance. | Targeted at cost-sensitive single-channel DDR3 notebooks; cannot replace ISL6537ACRZ-TR5160 in dual-channel or GMCH-coupled systems. | Only consider RT8205AZSP for simplified DDR3 memory power where GMCH core and CPU VTT regulation are handled externally. |
Compared with ISL6537ACRZ-TR5160, ISL6537CRZ-T offers identical functionality in alternate packaging, while RT8205AZSP provides reduced feature set and channel count - making it unsuitable for dual-channel DDR2 systems requiring full ACPI S3/S5 control and five-rail integration.
Availability
ISL6537ACRZ-TR5160 is available at Aetrix Electronics and suitable for desktop motherboards, graphics cards, ASIC memory interfaces, and embedded processor DDR subsystems requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.
Supply support for ISL6537ACRZ-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 Corporation is a global semiconductor leader formed from the merger of Renesas Technology and NEC Electronics, specializing in microcontrollers, analog, power management, and timing solutions for industrial, automotive, and computing markets.
The ISL6537ACRZ-TR5160 belongs to Renesas' legacy Intersil power management portfolio, designed specifically for ACPI-compliant DDR/DDR2 memory power systems in desktop PCs and graphics platforms - emphasizing integration, thermal robustness, and seamless sleep-state transitions.
FAQ
What is the primary function of the ISL6537ACRZ-TR5160 in a DDR memory system?
The ISL6537ACRZ-TR5160 serves as a complete ACPI-compliant power controller for dual-channel DDR/DDR2 memory systems. It generates five regulated outputs: VDDQ via synchronous buck PWM, DDR VTT via integrated 3A sink-source linear regulator, GMCH core voltage via second PWM, CPU/GMCH VTT via LDO controller, and DAC supply via another LDO. The ISL6537ACRZ-TR5160 manages all state transitions (S0/S1/S3) with sequenced soft-start and hardware-based fault protection.
Does the ISL6537ACRZ-TR5160 support DDR2 memory voltage requirements?
Yes, the ISL6537ACRZ-TR5160 fully supports DDR2 specifications. Its VDDQ output is adjustable down to 0.8V using external resistors, covering the DDR2 standard range of 1.8V ±0.1V. The integrated VTT regulator delivers ±3A peak current with precise VDDQ/2 tracking via VREF_OUT, meeting DDR2 termination accuracy and dynamic response requirements.
How does overcurrent protection work on the VDDQ regulator of the ISL6537ACRZ-TR5160?
The ISL6537ACRZ-TR5160 implements MOSFET rDS(ON)-based overcurrent protection on the VDDQ regulator using the OCSET pin. An internal 20 µA current source develops a voltage across external resistor ROCSET; when the voltage drop across the upper MOSFET exceeds this threshold, the controller initiates hiccup-mode soft-start cycling. This method avoids sense resistors, preserving efficiency and reducing component count.
What is the role of the VIDPGD pin on the ISL6537ACRZ-TR5160?
The VIDPGD pin on the ISL6537ACRZ-TR5160 is an open-drain status output indicating whether the GMCH/CPU VTT rail is within regulation. It pulls low when VTT_GMCH/CPU is out-of-spec in S0/S1/S2 states and remains low in all other sleep states. This signal enables system-level power-good monitoring and can be used to gate downstream logic or trigger fault logging in the host platform.
Can the ISL6537ACRZ-TR5160 be used in new designs given its 2007 datasheet revision?
Yes, the ISL6537ACRZ-TR5160 remains actively supported by Renesas Electronics with verified availability, full documentation, and production qualification. Its 0°C to +70°C rating, RoHS-compliant Pb-free packaging, and mature 6×6 QFN footprint make it suitable for new industrial and commercial designs where proven reliability and long-term supply continuity are prioritized over cutting-edge process nodes.
ISL6537ACRZ-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)
ISL6537ACRZ-TR5160 FAQ
1.How can I place an order for ISL6537ACRZ-TR5160 through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6537ACRZ-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 ISL6537ACRZ-TR5160 reliable?
The price and inventory of ISL6537ACRZ-TR5160 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6537ACRZ-TR5160 is usually 5 days.
3.What payment methods are accepted for ISL6537ACRZ-TR5160?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6537ACRZ-TR5160 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6537ACRZ-TR5160?
ISL6537ACRZ-TR5160 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6537ACRZ-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 ISL6537ACRZ-TR5160?
For technical support, including ISL6537ACRZ-TR5160 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6537ACRZ-TR5160 requirements.
6.How does Aetrix verify that ISL6537ACRZ-TR5160 is sourced from the original manufacturer or authorized distributors?
All ISL6537ACRZ-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 ISL6537ACRZ-TR5160 meets industry standards.
7.What is the process for return or replacement of ISL6537ACRZ-TR5160?
All ISL6537ACRZ-TR5160 units undergo pre-shipment inspection (PSI). If there is an issue with ISL6537ACRZ-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 ISL6537ACRZ-TR5160 part is unused and in its original packaging.
Return procedure for ISL6537ACRZ-TR5160:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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