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Renesas ISL6504ACB
- Part No.:
- ISL6504ACB
- Manufacturer:
- Renesas
- Category:
- Power Supply Controllers, Monitors
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
ISL6504ACB.pdf
- Description:
- IC MULTIPLE POWER CTRLR 16-SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,843
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Product details
Overview
ISL6504ACB from Intersil is a multiple linear power controller with ACPI control interface, designed for motherboard power management in microprocessor systems. It integrates four regulated outputs - 5VDUAL (USB/keyboard/mouse), 3.3VDUAL/3.3VSB (PCI/Auxiliary/LAN), 1.2VVID (processor VID circuitry), and 1.5VSB (ICH4 resume well) - using external pass transistors and internal regulators, all controlled via S3/S5 digital inputs across ACPI sleep states S0–S5.
For engineers reviewing the ISL6504ACB datasheet, ISL6504ACB pinout, ISL6504ACB application, or ISL6504ACB equivalent, key selection considerations include its 16-pin SOIC package, dual-state (active/sleep) output behavior, 5VDUAL retention in S4/S5 (distinguishing it from ISL6504), ±2.0% output regulation accuracy, and integrated undervoltage monitoring with centralized FAULT reporting.
Technical Context
The ISL6504ACB implements an ACPI-compliant multi-rail power sequencing architecture with three linear controllers and one dual-mode switch controller. Its 3.3VDUAL/3.3VSB regulator uses an external NPN transistor in S3/S4/S5 and an N-channel MOSFET in S0/S1/S2; the 5VDUAL controller switches ATX 5V in active states and ATX 5VSB in S3 (and S4/S5 for ISL6504A only).
It features independent internal regulators for 1.2VVID (active-state-only, sourced from 3V3) and 1.5VSB (always-on when 5VSB present, sourced from 3V3DL), plus integrated POR, soft-start (10µA current source), UV detection on all outputs, and thermal shutdown at 155°C. Control logic enforces legal state transitions and debounces S3/S5 inputs with 2µs filtering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage Accuracy | ±2.0% over temperature for all outputs - ensures stable rail compliance under thermal stress in motherboard environments. |
| 5VDUAL Sleep Behavior | Remains active in S4/S5 states - enables USB wake-from-disk and LAN resume functionality without auxiliary power loss. |
| Soft-Start Current | 10 µA typical - enables precise ramp-rate control of output voltages via external CSS capacitor to prevent 5VSB collapse during power-up. |
| Supply Current (Nominal) | 17 mA at 5VSB - defines bias consumption for system-level power budgeting in always-on standby domains. |
| UV Detection Thresholds | 3.3VDUAL: 2.75 V rising; 5VDUAL: 4.10 V rising; 1.5VSB: 1.25 V rising - sets precise fault-trigger points aligned with ATX spec margins. |
| Thermal Shutdown | 155°C junction - provides fail-safe protection against sustained overload or poor heatsinking on external pass devices. |
| Operating Temperature | 0°C to 70°C ambient - validated for commercial-grade motherboard deployment, not extended industrial use. |
Pinout & Package
ISL6504ACB is housed in a 16-lead wide-body SOIC package (M16.3 footprint), compatible with both wide and narrow SOIC footprints per datasheet note. Pin functions are electrically defined and validated per FN9062 Rev 2.00.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 3V3 (Pin 5) | ATX 3.3V input reference | Sources current for 1.2VVID regulator and serves as voltage monitor node for main 3.3V rail integrity. |
| 5VSB (Pin 16) | Bias supply input | Primary IC power source; powers all internal circuitry and POR function; monitored for startup initiation. |
| S3 / S5 (Pins 6 / 7) | ACPI sleep-state inputs | Digital control pins with 50 kΩ internal pull-ups to 5VSB; determine S0–S5 operating mode and enable state-specific output configurations. |
| FAULT (Pin 9) | Open-drain fault indicator | Pulled high to 5VSB on any UV event or overtemperature; requires external 1 kΩ pull-down for system-level fault signaling. |
| SS (Pin 13) | Soft-start / shutdown control | Accepts external capacitor for voltage ramp generation; pulled low (<0.8 V) forces full output shutdown and FAULT reset. |
| 3V3DL (Pin 3) | 3.3VDUAL/3.3VSB output node | Regulated output terminal; monitored for UV; supplies current to 1.5VSB regulator and external load. |
| DLA (Pin 10) | N-MOS gate drive output | Open-collector driver for external N-channel MOSFET gates; pulls up to ATX 12V via external resistor to enable 3.3V/5V switching in active states. |
| 5VDLSB (Pin 11) | 5VDUAL sleep-state gate control | Drives gate of P-MOSFET or PNP to connect 5VSB to 5VDUAL output in S3 and S4/S5 - key differentiator vs. ISL6504. |
Key Features
| Feature | Design Value |
|---|---|
| Four ACPI-controlled outputs | Enables single-chip implementation of 5VDUAL, 3.3VDUAL/3.3VSB, 1.2VVID, and 1.5VSB rails with state-aware switching logic. |
| Integrated undervoltage monitoring | Centralized FAULT reporting for all outputs and ATX inputs eliminates need for discrete supervisors in ACPI designs. |
| State-selectable 5VDUAL behavior | ISL6504ACB maintains 5VDUAL in S4/S5 - critical for resume-from-disk and network wake-on-LAN functionality. |
| Programmable soft-start | 10 µA internal current source + external capacitor allows precise control of output slew rate to avoid 5VSB droop during cold start. |
| Thermal fault protection | Two-stage thermal response: FAULT flag at 140°C (typ), full shutdown at 155°C - prevents damage during sustained overload conditions. |
Applications
| Desktop Motherboard Power Management | ACPI-Compliant Suspend-to-Disk Systems |
|---|---|
Use Scenario: Regulating auxiliary power rails on ATX-compliant desktop motherboards supporting Intel ICH4 and similar chipsets. IC Role / Device Role / Timing Role: Centralized ACPI power controller managing 5VDUAL, 3.3VDUAL/3.3VSB, 1.2VVID, and 1.5VSB with state-dependent pass device control. Use Value: Reduces component count by integrating four regulated outputs and monitoring into one SOIC device, simplifying layout and improving reliability over discrete solutions. |
Use Scenario: Enabling reliable resume-from-disk (S4) and soft-off (S5) states while maintaining USB and LAN connectivity. IC Role / Device Role / Timing Role: Maintains 5VDUAL rail active during S4/S5 via 5VSB-powered P-MOSFET control, unlike ISL6504 which shuts it down. Use Value: Allows wake-on-USB keyboard/mouse and wake-on-LAN without requiring secondary power sources or complex external circuitry. |
| Processor VID Circuitry Supply | South Bridge Standby Power |
Use Scenario: Providing tightly regulated 1.2V supply exclusively during active CPU states (S0/S1/S2) for voltage identification circuitry. IC Role / Device Role / Timing Role: Internal linear regulator sourcing from 3V3 pin; disabled automatically in all sleep states to eliminate leakage. Use Value: Eliminates need for external enable logic or separate LDO, reducing BOM cost and ensuring zero quiescent current draw from VID rail in sleep modes. |
Use Scenario: Delivering stable 1.5VSB to ICH4 and other chipset components during all standby states where 5VSB is present. IC Role / Device Role / Timing Role: Always-on internal regulator powered by 3V3DL; remains active as long as 5VSB is applied, independent of S3/S5 state. Use Value: Guarantees consistent resume-well voltage for chipset logic, enabling fast wake latency and eliminating brown-out resets during S3 transitions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multiple-output ACPI power controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6504CB | Identical pinout and package; 5VDUAL shuts down in S4/S5 instead of remaining active. | Not suitable for S4/S5 wake functionality; appropriate only where 5VDUAL disable in deep sleep is acceptable. | Select ISL6504CB only if system design does not require USB/LAN wake from disk or soft-off states. |
| RT8205A | Single-chip 5-output solution with integrated MOSFET drivers; supports 3.3V/5V/1.2V/1.5V/1.8V rails; no S4/S5 5VDUAL retention feature. | Targets newer platforms with higher integration; lacks explicit S4/S5 5VDUAL persistence logic found in ISL6504A family. | Consider RT8205A for new designs needing higher integration and lower external component count, but verify S4/S5 wake requirements separately. |
Compared with ISL6504CB and RT8205A, the ISL6504ACB uniquely guarantees 5VDUAL continuity through S4/S5 sleep states using dedicated 5VSB-sourced control, making it irreplaceable for legacy ATX systems requiring guaranteed resume-from-disk capability without board-level redesign.
Availability
ISL6504ACB is available at Aetrix Electronics and suitable for desktop motherboard design, ACPI-compliant power management, and legacy PC platform sustainment requiring stable component supply and long-term lifecycle support.
Supply support for ISL6504ACB 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 was a U.S.-based semiconductor company specializing in precision analog and power management ICs, later acquired by Renesas Electronics in 2017.
The ISL6504ACB belongs to Intersil's ACPI-compliant power controller product line, engineered specifically for ATX motherboard power sequencing and multi-rail standby management in x86-based computing platforms.
FAQ
What is the key functional difference between ISL6504ACB and ISL6504CB?
The ISL6504ACB maintains the 5VDUAL output active during S4/S5 sleep states by switching in ATX 5VSB via the 5VDLSB pin, whereas the ISL6504CB shuts down 5VDUAL in S4/S5. This distinction is explicitly documented in Table 1 of the FN9062 datasheet and defines the primary selection criterion for wake-from-disk applications. All other pin functions, timing, and regulation specs remain identical between the two variants.
Does ISL6504ACB support both SOIC and QFN packages?
No - the ISL6504ACB is specified exclusively in the 16-lead wide-body SOIC package (M16.3 footprint), as confirmed in the Ordering Information table on page 2 of FN9062 Rev 2.00. The QFN variant is designated as ISL6504ACR (20-pin 6x6). Package compatibility is not interchangeable; PCB layout must match the SOIC land pattern for ISL6504ACB.
How does ISL6504ACB handle undervoltage faults on its outputs?
The ISL6504ACB monitors all four outputs (5VDUAL, 3.3VDUAL/3.3VSB, 1.2VVID, 1.5VSB) for undervoltage events using dedicated comparators. When any output drops below its rising threshold (e.g., 2.75 V for 3.3VDUAL), the open-drain FAULT pin is pulled high to 5VSB. For internally regulated outputs (1.2VVID, 1.5VSB), the fault also disables the respective regulator; for externally switched outputs, only FAULT assertion occurs.
Can ISL6504ACB be used in new designs despite its obsolete status?
Yes - although marked "OBSOLETE PRODUCT" with "NO RECOMMENDED REPLACEMENT" in the datasheet, ISL6504ACB remains available through authorized distributors and Aetrix Electronics for legacy sustainment, repair, and backward-compatible motherboard production. Its unique S4/S5 5VDUAL retention behavior has no direct drop-in replacement, making it essential for maintaining existing platform functionality.
What is the role of the SS (soft-start) pin on ISL6504ACB?
The SS pin on ISL6504ACB serves dual functions: (1) it accepts an external capacitor to generate a controlled voltage ramp that governs the slew rate of regulated outputs during power-up, preventing 5VSB collapse; and (2) pulling SS below 0.8 V forces immediate shutdown of all outputs and resets the FAULT flag. The internal 10 µA current source charges the capacitor, enabling precise timing control per application requirements.
ISL6504ACB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm 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
ISL6504ACB FAQ
1.How can I place an order for ISL6504ACB through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6504ACB 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 ISL6504ACB reliable?
The price and inventory of ISL6504ACB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6504ACB is usually 5 days.
3.What payment methods are accepted for ISL6504ACB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6504ACB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6504ACB?
ISL6504ACB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6504ACB 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 ISL6504ACB?
For technical support, including ISL6504ACB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6504ACB requirements.
6.How does Aetrix verify that ISL6504ACB is sourced from the original manufacturer or authorized distributors?
All ISL6504ACB 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 ISL6504ACB meets industry standards.
7.What is the process for return or replacement of ISL6504ACB?
All ISL6504ACB units undergo pre-shipment inspection (PSI). If there is an issue with ISL6504ACB, 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 ISL6504ACB part is unused and in its original packaging.
Return procedure for ISL6504ACB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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