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Renesas ISL6504ACBN
- Part No.:
- ISL6504ACBN
- Manufacturer:
- Renesas
- Category:
- Power Supply Controllers, Monitors
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ISL6504ACBN.pdf
- Description:
- IC MULTIPLE POWER CTRLR 16-SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,702
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Product details
Overview
ISL6504ACBN from Intersil is a multiple linear power controller with ACPI control interface, integrating three linear regulators and dual switching controllers for 1.5VSB, 1.2VVID, 3.3VDUAL/3.3VSB, and 5VDUAL voltage planes in ATX-compliant motherboard designs. It operates in S0–S5 ACPI states using S3/S5 digital inputs, delivers ±2.0% output regulation over temperature, and supports 0°C to 70°C ambient operation in 16-pin wide-body SOIC package.
For engineers reviewing the ISL6504ACBN datasheet, ISL6504ACBN pinout, ISL6504ACBN application, or ISL6504ACBN equivalent, key selection criteria include its S4/S5 sleep-state behavior (5VDUAL remains active), integrated undervoltage monitoring with centralized FAULT reporting, thermal shutdown at 155°C, and compatibility with external NPN/N-MOS/PMOS pass devices for regulated outputs.
Technical Context
The ISL6504ACBN implements four independent regulated outputs: internal 1.5VSB (VOUT1) sourced from 3V3DL, internal 1.2VVID (VOUT2) active only in S0/S1/S2 and sourced from 3V3, external 3.3VDUAL/3.3VSB (VOUT3) controlled via 3V3DLSB base drive and DLA gate drive, and 5VDUAL (VOUT4) switched via 5VDLSB gate control and DLA pull-up. All outputs feature dedicated undervoltage detection with 10μs timeout and hysteresis ranging from 60mV to 200mV.
Its ACPI state machine enforces legal transitions only between active (S0/S1/S2) and sleep (S3, S4/S5) states-no direct S3↔S4/S5 transition is allowed. The 200μs S3 delay timer ensures synchronized entry into S3 or S4/S5 based on S5 status, while 5VSB POR initiates soft-start using a 10μA current source charging an external CSS capacitor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Temp Range | 0°C to 70°C ambient - defines commercial-grade use in desktop motherboard VRM subsystems |
| Output Regulation Accuracy | ±2.0% over temperature - ensures stable 1.2VVID, 1.5VSB, and 3.3VDUAL/3.3VSB for chipset and I/O logic |
| 5VDUAL Sleep Behavior | Remains active in S4/S5 - distinguishes ISL6504ACBN from ISL6504CBN and enables resume-from-disk functionality |
| Soft-Start Current | 10μA typical - sets ramp rate of all outputs via external CSS capacitor; enables controlled inrush management |
| FAULT Reporting | Open-drain to 5VSB - signals undervoltage on any output or overtemperature (>140°C) without latching off entire IC |
| Thermal Shutdown | 155°C junction - unconditional shutdown of all outputs prevents thermal runaway during sustained overload |
| Supply Current (Active) | 17mA nominal - low bias draw from 5VSB rail supports efficient standby power budgeting |
Pinout & Package
ISL6504ACBN uses a 16-pin wide-body SOIC package (PKG DWG # M16.15), with GND (Pin 8) as signal reference and bottom pad unconnected or tied to ground per layout guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (1V5SB) | 1.5V standby regulator output | Supplies ICH4 resume well; draws current from 3V3DL; monitored for UV (1.25V threshold) |
| 2 (3V3DLSB) | NPN base drive for 3.3VDUAL/3.3VSB sleep regulation | Drives external NPN transistor in S3/S4/S5; enables low-loss 3.3V delivery when main ATX 3.3V is off |
| 3 (3V3DL) | 3.3VDUAL/3.3VSB output node | Delivers regulated 3.3V in sleep states; connected directly to ATX 3.3V in active states via external NMOS |
| 4 (1V2VID) | 1.2V VID circuitry supply | Active only in S0/S1/S2; powers processor VID decode logic; shut down in all sleep states |
| 5 (3V3) | ATX 3.3V input reference | Source for 1V2VID regulator; monitored for undervoltage (2.75V rising threshold) |
| 6 (S3) | ACPI S3 sleep state input | Digital input with 50kΩ pull-up to 5VSB; deglitched (2μs); triggers 200μs timer before state transition |
| 7 (S5) | ACPI S4/S5 sleep state input | Digital input with 50kΩ pull-up to 5VSB; determines S4/S5 vs S3 entry when S3 goes low |
| 8 (GND) | Signal ground reference | Common return for all analog and digital circuits; must be low-impedance connection to PCB ground plane |
| 9 (FAULT) | Centralized fault reporting output | Open-drain to 5VSB; pulled high on any UV event or >140°C temp; requires 1kΩ pull-down |
| 10 (DLA) | Gate drive enable for external NMOS | Open-collector output; pulls gates of Q2/Q4 to 12V in active state to connect ATX 3.3V/5V to outputs |
| 11 (5VDLSB) | PMOS/PNP gate drive for 5VDUAL sleep path | Switches ATX 5VSB to 5VDUAL in S3 (ISL6504ACBN) and S3+S4/S5 (ISL6504ACBN) |
| 12 (5VDL) | 5VDUAL output node | Connected to ATX 5V via NMOS in active state; monitored for UV (4.10V rising threshold) |
| 13 (SS) | Soft-start and shutdown control | 10μA current source charges external capacitor; pulled <0.8V to shut down all outputs |
| 14 (VID_PG) | 1.2VVID power-good indicator | Open-collector output; released after VID_CT capacitor charges to 1.25V; requires 10kΩ pull-up to 1V2VID |
| 15 (VID_CT) | VID_PG timing capacitor node | Charged by 10μA current source; sets delay before VID_PG assertion; 1nF ≈ 1ms delay |
| 16 (5VSB) | Main bias supply input | Accepts +5V ±5% ATX standby rail; powers entire IC; monitored for POR (4.5V rising threshold) |
Key Features
| Feature | Design Value |
|---|---|
| Four ACPI-controlled voltage rails | Simultaneously manages 5VDUAL (USB/keyboard), 3.3VDUAL/3.3VSB (PCI/LAN), 1.2VVID (processor ID), and 1.5VSB (ICH4 resume well) under full ACPI state control |
| S4/S5 5VDUAL retention | Enables system wake-from-disk by maintaining 5V to USB peripherals and network controllers during S4/S5 sleep - unique to ISL6504A variants |
| Integrated undervoltage monitoring | Centralized FAULT pin reports UV on all four outputs plus 3V3 and 5VSB inputs, eliminating need for discrete supervisors |
| Programmable soft-start | External CSS capacitor sets ramp time for all outputs; prevents inrush-induced 5VSB collapse during cold start or resume |
| Thermal protection with hysteresis | Reports FAULT at 140°C and shuts down at 155°C; resumes only after full 5VSB power cycle - prevents latch-up during transient overheating |
Applications
| Desktop Motherboard Power Management | ACPI-Compliant Suspend-to-Disk Systems |
|---|---|
Use Scenario: ATX motherboard implementing full ACPI S0–S5 state transitions with Intel ICH4 southbridge and Pentium 4 processor. IC Role / Device Role / Timing Role: Centralized linear controller managing 1.5VSB, 1.2VVID, 3.3VDUAL/3.3VSB, and 5VDUAL rails with state-aware switching and monitoring. Use Value: Eliminates four discrete regulators and supervisor ICs; reduces BOM count and PCB area while ensuring ±2.0% regulation across all states. | Use Scenario: System requiring reliable resume-from-disk (S4) with persistent USB keyboard/mouse and LAN connectivity. IC Role / Device Role / Timing Role: Maintains 5VDUAL output active during S4/S5 sleep via 5VDLSB-driven PMOS switch, enabling wake events from peripheral activity. Use Value: Enables true S4 functionality without external 5V hold-up circuitry - only ISL6504A variants support this behavior. |
| Processor VID Voltage Identification Support | Thermally Protected Chipset Power Delivery |
Use Scenario: Motherboard supplying dynamic VID-based core voltage to Pentium 4 or compatible CPUs. IC Role / Device Role / Timing Role: Generates clean 1.2VVID only during active states (S0/S1/S2) using 3V3 as input; asserts VID_PG after programmable delay. Use Value: Ensures VID circuitry is powered only when needed, reducing idle power; VID_PG delay prevents false CPU reset during soft-start. | Use Scenario: High-density desktop board with limited airflow and risk of localized heating near VRM components. IC Role / Device Role / Timing Role: Monitors die temperature and asserts FAULT at 140°C; shuts down all outputs at 155°C to prevent thermal damage. Use Value: Protects southbridge, memory controller, and I/O chips from overtemperature failure without requiring external thermal sensors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multiple linear power controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6504CBN | Identical pinout and function except 5VDUAL shuts down in S4/S5 sleep states | Not suitable for resume-from-disk; appropriate only for S3-only suspend systems | Select ISL6504CBN only if S4/S5 5V retention is not required and cost minimization is prioritized |
| RT8205A | Single-chip solution with integrated MOSFET drivers; supports 1.5V/1.2V/3.3V/5V rails but lacks S4/S5 5VDUAL retention logic | Requires external AC/DC controller for 5VSB bias; no native 5VSB POR or VID_CT timing control | Consider RT8205A for new designs where integrated drivers reduce external component count, but verify S4 wake capability via system-level testing |
Compared with ISL6504CBN and RT8205A, the ISL6504ACBN uniquely guarantees 5VDUAL availability throughout S4/S5 sleep-critical for legacy BIOS-based resume-from-disk-while retaining identical SOIC footprint and control interface, enabling drop-in replacement where S4 functionality is mandatory.
Availability
ISL6504ACBN is available at Aetrix Electronics and suitable for desktop motherboard design, ACPI-compliant power management, and thermally constrained embedded computing applications requiring stable component supply and long-term lifecycle support.
Supply support for ISL6504ACBN 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
Intersil Corporation (now part of Renesas Electronics) is a U.S.-based semiconductor company specializing in precision analog and power management ICs for computing, industrial, and communications markets.
The ISL6504A product line was designed specifically for ACPI-compliant motherboard power sequencing, delivering tightly regulated multi-rail outputs with integrated state-aware control, fault reporting, and thermal protection for Intel Pentium 4 and ICH4-era platforms.
FAQ
What is the key functional difference between ISL6504ACBN and ISL6504CBN?
The ISL6504ACBN maintains 5VDUAL output during S4/S5 sleep states, whereas ISL6504CBN shuts down 5VDUAL in S4/S5. This distinction enables resume-from-disk functionality in systems using ISL6504ACBN. Both share identical pinout, package, and all other electrical specifications-including ±2.0% output regulation, 10μA soft-start current, and 155°C thermal shutdown-making ISL6504ACBN a direct functional upgrade for S4-supporting designs.
How does the ISL6504ACBN handle undervoltage conditions on its outputs?
The ISL6504ACBN monitors all four regulated outputs (1.5VSB, 1.2VVID, 3.3VDUAL/3.3VSB, 5VDUAL) plus 3V3 and 5VSB inputs for undervoltage. When any monitored voltage falls below its rising threshold (e.g., 1.25V for 1.5VSB, 2.75V for 3V3), the open-drain FAULT pin is pulled high to 5VSB. No automatic latch-off occurs for externally switched outputs; only internally regulated outputs (1.5VSB, 1.2VVID) shut down upon UV detection. The FAULT signal requires external 1kΩ pull-down.
Can the ISL6504ACBN be used in new designs despite its obsolete status?
Yes-ISL6504ACBN remains viable for legacy-compatible motherboard repairs, spare-part fulfillment, and backward-compatible industrial systems where S4/S5 5VDUAL retention is required. While Intersil lists it as obsolete with no recommended replacement, Aetrix Electronics maintains verified inventory and provides full technical documentation. New designs should evaluate modern alternatives like Renesas ISL6504A derivatives or Richtek RT8205A, but ISL6504ACBN is fully supported for existing platform continuity.
What is the role of the SS pin on the ISL6504ACBN and how is it used for shutdown?
The SS (Soft-Start) pin on the ISL6504ACBN serves dual functions: it controls output ramp-up via an internal 10μA current source charging an external capacitor, and acts as a global shutdown input. Pulling SS below 0.8V with an open-drain device sinks ≥2mA, forcing immediate shutdown of all pass elements and driving FAULT low. Release of SS initiates a full soft-start sequence. This feature enables system-level power sequencing and emergency fault recovery without cycling 5VSB.
Does the ISL6504ACBN require external pass transistors for all its regulated outputs?
No-the ISL6504ACBN integrates pass elements only for 1.5VSB (VOUT1) and 1.2VVID (VOUT2); these outputs do not require external transistors. However, 3.3VDUAL/3.3VSB (VOUT3) and 5VDUAL (VOUT4) rely on external devices: 3V3DLSB drives an NPN for sleep-state 3.3V regulation, DLA drives NMOS for active-state 3.3V/5V connection, and 5VDLSB drives PMOS/PNP for 5VSB-fed 5VDUAL in sleep. This architecture optimizes efficiency across ACPI states.
ISL6504ACBN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Applications:
- Power Supply Controller/Monitor
- Voltage - Input:
- -
- Voltage - Supply:
- 4.75V ~ 5.25V
- Current - Supply:
- 17 mA
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
ISL6504ACBN FAQ
1.How can I place an order for ISL6504ACBN through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6504ACBN 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 ISL6504ACBN reliable?
The price and inventory of ISL6504ACBN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6504ACBN is usually 5 days.
3.What payment methods are accepted for ISL6504ACBN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6504ACBN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6504ACBN?
ISL6504ACBN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6504ACBN 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 ISL6504ACBN?
For technical support, including ISL6504ACBN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6504ACBN requirements.
6.How does Aetrix verify that ISL6504ACBN is sourced from the original manufacturer or authorized distributors?
All ISL6504ACBN 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 ISL6504ACBN meets industry standards.
7.What is the process for return or replacement of ISL6504ACBN?
All ISL6504ACBN units undergo pre-shipment inspection (PSI). If there is an issue with ISL6504ACBN, 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 ISL6504ACBN part is unused and in its original packaging.
Return procedure for ISL6504ACBN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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