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Renesas ISL6504CR
- Part No.:
- ISL6504CR
- Manufacturer:
- Renesas
- Category:
- Power Supply Controllers, Monitors
- Package:
- 20-VQFN Exposed Pad
- Datasheet:
-
ISL6504CR.pdf
- Description:
- IC MULTIPLE POWER CTRLR 20-QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,090
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Product details
Overview
ISL6504CR 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 - 3.3VDUAL/3.3VSB (3.3V), 5VDUAL (5V), 1.2VVID, and 1.5VSB - with sleep-state control via S3/S5 pins, undervoltage monitoring, thermal shutdown, and soft-start functionality. It operates in 0°C to 70°C ambient and supports ATX-compliant ACPI S0–S5 state transitions.
For engineers reviewing the ISL6504CR datasheet, ISL6504CR pinout, ISL6504CR application, or ISL6504CR equivalent, this device serves as a critical ACPI-compliant power sequencer for motherboard 3.3V/5V dual-rail, processor VID, and chipset standby supplies - requiring precise timing, fault reporting, and low-quiescent-current operation during S3/S4/S5 sleep states.
Technical Context
The ISL6504CR implements a mixed-signal architecture combining three linear regulators (1.5VSB, 1.2VVID, 3.3VDUAL/3.3VSB) and one dual-mode switch controller (5VDUAL), all synchronized to ACPI S3/S5 digital inputs. Its internal 10 µA soft-start current source charges an external capacitor to control output ramp rates, while independent UV detectors monitor all four outputs with 2.0% regulation tolerance and programmable hysteresis.
It features integrated temperature monitoring (125°C fault, 155°C shutdown), open-collector FAULT reporting, and dedicated control terminals (DLA, 3V3DLSB, 5VDLSB) to drive external NPN/PNP/MOSFET pass devices. The QFN-20 package enables compact layout with GND-exposed thermal pad and supports RoHS-compliant reflow.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltages | 3.3VDUAL/3.3VSB (3.3V), 5VDUAL (5V), 1.2VVID, 1.5VSB - each with dedicated regulation and UV monitoring |
| Regulation Accuracy | ±2.0% over temperature - ensures stable voltage delivery to south bridge, PCI slots, ICH4 resume well, and processor VID circuitry |
| Soft-Start Current | 10 µA typical - enables controlled ramp-up of all outputs using external CSS capacitor (0.1 µF recommended) |
| Thermal Protection | Fault at 125°C, shutdown at 155°C - prevents thermal runaway during overload or poor heatsinking of external pass devices |
| Supply Current | 17 mA nominal (5VSB), 4 mA shutdown - minimizes standby power draw in S4/S5 states |
| Package | 20-pin QFN 6×6 mm, exposed GND pad - provides low θJA = 32°C/W for efficient thermal dissipation on PCB |
| Operating Temp | 0°C to 70°C ambient - validated for commercial-grade motherboard environments |
Pinout & Package
ISL6504CR is housed in a 20-pin QFN 6×6 mm package with exposed GND pad electrically connected to substrate (GND potential). The bottom pad may be left unconnected or tied to PCB GND plane; it must not be connected to any other potential.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (1V5SB) | 1.5VSB regulator output | Supplies ICH4 resume well; draws current from 3V3DL; active whenever 5VSB is present |
| 2 (3V3DLSB) | NPN base drive for 3.3VDUAL/3.3VSB sleep regulation | Drives external NPN transistor to regulate 3.3V during S3/S4/S5 states |
| 3 (3V3DL) | 3.3VDUAL/3.3VSB output node | Delivers regulated 3.3V to PCI/Aux/LAN; monitored for UV; powers 1.5VSB regulator |
| 4 (1V2VID) | 1.2VVID regulator output | Supplies processor voltage identification circuitry only in S0/S1/S2 active states |
| 5 (3V3) | ATX 3.3V input supply | Source for 1.2VVID regulator; monitored for UV; used to enable active-state 3.3VDUAL path |
| 6 (S3) | ACPI S3 sleep control input | Digital input with 50 kΩ pull-up to 5VSB; deglitched (2 µs); initiates S3 transition after 200 µs delay |
| 7 (S5) | ACPI S4/S5 sleep control input | Digital input with 50 kΩ pull-up to 5VSB; deglitched (2 µs); determines S4/S5 entry when S3=low |
| 8 (GND) | Signal ground reference | Common return for all analog and digital functions; connects to exposed thermal pad |
| 9 (FAULT) | Open-collector fault reporting output | Pulled high to 5VSB on any UV event, overtemperature, or illegal state transition |
| 10 (DLA) | N-MOS gate drive for 3.3VDUAL/5VDUAL active-path switching | Open-collector output; requires 1 kΩ pull-up to 12V to drive external N-MOSFET gates |
| 11 (5VDLSB) | P-MOS/PNP gate/base drive for 5VDUAL sleep-path switching | Connects ATX 5VSB to 5VDUAL in S3 (ISL6504CR) or S3+S4/S5 (ISL6504A); not applicable to ISL6504CR |
| 12 (5VDL) | 5VDUAL output node | Delivers 5V to USB/keyboard/mouse; monitored for UV; shut down in S4/S5 per ISL6504CR spec |
| 13 (SS) | Soft-start and shutdown control | External capacitor sets ramp rate; pulled low (<0.8V) forces full shutdown and FAULT reset |
| 14 (VID_PG) | 1.2VVID power-good open-collector output | Reports 1.2VVID regulation status; requires 10 kΩ pull-up to 1.2VVID output |
| 15 (VID_CT) | VID_PG delay timing capacitor node | 10 µA internal current source charges external capacitor to set VID_PG assertion delay |
| 16 (5VSB) | Main bias supply input | Connects to ATX 5VSB; powers entire IC; monitored for POR (4.5V threshold, 0.9V hysteresis) |
| 17–20 (NC) | No-connect terminals | Not internally bonded; must remain unconnected per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| Four ACPI-controlled outputs | Enables single-chip implementation of 3.3VDUAL/3.3VSB, 5VDUAL, 1.2VVID, and 1.5VSB rails with state-aware sequencing |
| State-selectable 5VDUAL behavior | ISL6504CR shuts down 5VDUAL in S4/S5 - reduces system standby power vs. ISL6504A which maintains 5VDUAL |
| Integrated UV monitoring & centralized FAULT | Single open-collector FAULT pin reports undervoltage on any output or input rail, simplifying system-level fault handling |
| Programmable soft-start | 10 µA current source + external capacitor allows precise control of output ramp rates to prevent ATX 5VSB collapse |
| Thermal fault protection | 125°C overtemperature flag and 155°C unconditional shutdown protect against MOSFET or PCB thermal failure |
Applications
| Desktop Motherboard Power Management | ACPI-Compliant Sleep-State Sequencing |
|---|---|
|
Use Scenario: Regulating auxiliary power rails on ATX-compliant desktop motherboards supporting Intel/AMD processors. IC Role / Device Role / Timing Role: Primary ACPI power sequencer managing 3.3VDUAL/3.3VSB, 5VDUAL, 1.2VVID, and 1.5VSB with S3/S5 state awareness. Use Value: Eliminates discrete logic and multiple regulators; ensures correct rail activation order and UV safety across S0–S5 states. |
Use Scenario: Enabling reliable suspend-to-RAM (S3) and suspend-to-disk (S4/S5) transitions without rail instability. IC Role / Device Role / Timing Role: State machine controller that interprets S3/S5 signals and sequences output enable/disable with built-in delays and soft-start. Use Value: Prevents illegal state transitions (e.g., S3→S4), enforces 200 µs S3 delay, and guarantees 25 ms stabilization before 1.2VVID activation. |
| South Bridge & I/O Hub Power | Processor VID Circuitry Supply |
|
Use Scenario: Delivering stable 3.3V and 5V auxiliary power to south bridge, PCI slots, LAN PHY, and USB controllers. IC Role / Device Role / Timing Role: Dual-mode linear/switched regulator providing 3.3VDUAL/3.3VSB (NPN in sleep, NMOS in active) and 5VDUAL (NMOS in active, PMOS in S3). Use Value: Minimizes conduction loss in active state (direct 3.3V connection) while maintaining low-noise 3.3V in sleep via linear regulation. |
Use Scenario: Supplying precisely regulated 1.2V to CPU voltage identification (VID) circuitry during active processor operation. IC Role / Device Role / Timing Role: Dedicated 1.2VVID linear regulator enabled only in S0/S1/S2 states; disabled in all sleep modes to save power. Use Value: Reduces idle power by eliminating unnecessary 1.2V load during S3/S4/S5; includes VID_PG with programmable delay for safe VID handshake. |
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 |
|---|---|---|---|
| ISL6504ACR | Same pinout and package; maintains 5VDUAL output in S4/S5 sleep states (vs. ISL6504CR shutdown) | Required where USB/keyboard/mouse must remain powered during soft-off (S5) for wake-on-USB or remote management | Select ISL6504ACR if continuous 5VDUAL in S4/S5 is required; otherwise ISL6504CR reduces standby power. |
| RT8205AZQW | Single-chip 5-phase VRM controller with integrated MOSFET drivers; no native ACPI S3/S5 logic or 1.5VSB/1.2VVID outputs | Targets CPU core voltage regulation only; lacks multi-rail ACPI sequencing, VID support, and chipset standby supplies | Not a functional replacement; use only if redesigning for modern VRM topology and abandoning legacy ACPI auxiliary rail requirements. |
Compared with ISL6504ACR and RT8205AZQW, the ISL6504CR uniquely combines quad-rail regulation, hardware-enforced ACPI state transitions, and sleep-aware 5VDUAL shutdown - making it irreplaceable for legacy ATX motherboard designs requiring strict S4/S5 power gating.
Availability
ISL6504CR is available at Aetrix Electronics and suitable for desktop motherboard design, ACPI-compliant power sequencing, and industrial embedded computing applications requiring stable component supply and long-term lifecycle support.
Supply support for ISL6504CR 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 (now part of Renesas Electronics) is a semiconductor company specializing in precision analog, power management, and interface ICs for computing, industrial, and communications markets.
The ISL6504CR belongs to Intersil's ACPI-compliant power controller product line, engineered specifically for ATX motherboard auxiliary rail regulation, sleep-state sequencing, and fault-safe multi-voltage management in x86-based systems.
FAQ
What is the key functional difference between ISL6504CR and ISL6504ACR?
The ISL6504CR shuts down the 5VDUAL output in S4/S5 sleep states, while the ISL6504ACR maintains 5VDUAL during those states. This distinction is the sole functional difference between the two parts, as confirmed in Table 1 of the FN9062 datasheet. Both share identical pinout, package, and all other electrical characteristics. ISL6504CR is selected when minimizing S5 standby power is critical.
Does ISL6504CR support both SOIC and QFN packages?
No - the ISL6504CR is exclusively offered in the 20-pin QFN 6×6 mm package (ordering code L20.6x6). The SOIC variants (e.g., ISL6504CB) are separate part numbers with different pin count (16-pin) and layout. ISL6504CR's QFN package provides lower thermal resistance (θJA = 32°C/W) and improved PCB efficiency versus SOIC.
How does ISL6504CR handle undervoltage faults on its outputs?
The ISL6504CR monitors all four outputs (3.3VDUAL/3.3VSB, 5VDUAL, 1.2VVID, 1.5VSB) for undervoltage events using dedicated comparators. If any output drops below its rising threshold (e.g., 2.75V for 3.3VDUAL), the open-collector 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 asserts.
Can ISL6504CR be used in new designs despite its obsolete status?
Yes - although marked "OBSOLETE PRODUCT" with "NO RECOMMENDED REPLACEMENT" in the datasheet, ISL6504CR remains available through authorized distributors and Aetrix Electronics with full traceable sourcing and lifecycle coordination. Its unique ACPI S4/S5 5VDUAL shutdown behavior has no direct drop-in successor, making it essential for maintaining legacy motherboard designs.
What is the role of the SS pin on ISL6504CR, and how is it used?
The SS (Soft-Start) pin on ISL6504CR serves dual functions: (1) it controls output ramp-up rate via an external capacitor charged by a 10 µA internal current source, and (2) pulling SS below 0.8V forces immediate shutdown of all outputs and resets the FAULT pin. A 0.1 µF ceramic capacitor is recommended to achieve controlled start-up without collapsing the ATX 5VSB rail.
ISL6504CR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 20-VQFN Exposed Pad
- 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:
- 20-QFN (6x6)
ISL6504CR FAQ
1.How can I place an order for ISL6504CR through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6504CR 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 ISL6504CR reliable?
The price and inventory of ISL6504CR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6504CR is usually 5 days.
3.What payment methods are accepted for ISL6504CR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6504CR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6504CR?
ISL6504CR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6504CR 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 ISL6504CR?
For technical support, including ISL6504CR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6504CR requirements.
6.How does Aetrix verify that ISL6504CR is sourced from the original manufacturer or authorized distributors?
All ISL6504CR 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 ISL6504CR meets industry standards.
7.What is the process for return or replacement of ISL6504CR?
All ISL6504CR units undergo pre-shipment inspection (PSI). If there is an issue with ISL6504CR, 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 ISL6504CR part is unused and in its original packaging.
Return procedure for ISL6504CR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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