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Renesas ISL6506CBZ
- Part No.:
- ISL6506CBZ
- Manufacturer:
- Renesas
- Category:
- Power Supply Controllers, Monitors
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
ISL6506CBZ.pdf
- Description:
- IC PWR SUPPLY CTRLR/MONITR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,962
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Product details
Overview
ISL6506CBZ from Renesas Electronics is a multiple linear power controller with ACPI control interface, designed for motherboard-level 5VDUAL and 3.3VDUAL rail management in ATX-compliant microprocessor systems. It integrates an internal 3.3V LDO (2A current limit), dual-switch control for 5V/5VSB routing, and S3/S5 state-selectable operation in an 8-lead EPSOIC package. Used in USB/keyboard/mouse (5VDUAL) and PCI/LAN/auxiliary (3.3VDUAL) power domains.
For engineers reviewing the ISL6506CBZ datasheet, ISL6506CBZ pinout, ISL6506CBZ application, or ISL6506CBZ equivalent, this page delivers verified technical context, exact pin functions, real-world ACPI sleep-state behavior (S0–S4/S5), thermal shutdown thresholds, soft-start timing, and validated alternative options for motherboard power architecture design.
Technical Context
The ISL6506CBZ implements dual-rail ACPI power sequencing: it regulates 3.3VDUAL via an internal LDO during S3/S4/S5 states (2A capability), while switching 5VDUAL between ATX 5V (active S0/S1/S2) and 5VSB (S3/S4/S5) using external MOSFETs controlled by DLA and 5VDLSB pins. Its digital S3/S5 inputs feature 10µA internal pull-downs and illegal-state blocking logic.
It includes integrated POR monitoring of both 5VSB (4.5V rising threshold) and 12VATX (9.8V typical), overtemperature shutdown at 140°C, and soft-start intervals of 6.55–9.85ms. The device operates across 0°C to +70°C ambient, with junction temperature up to +125°C, and uses an exposed-pad SOIC for thermal dissipation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +4.5V to +5.5V on V5VSB; supports ATX 5VSB input with guaranteed operation down to 4.5V |
| 3.3VDUAL LDO Current Limit | 2A - enables full-power auxiliary loads (LAN, PCI, USB suspend) during S3/S4/S5 sleep states |
| 5VDUAL Sleep-State Control | Active in S3/S4/S5 - maintains 5VDUAL output from 5VSB in all ACPI sleep modes (per ISL6506B variant) |
| Soft-Start Interval | 6.55–9.85ms - ensures controlled ramp-up of 3.3VDUAL and 5VDUAL rails to prevent inrush-induced voltage droop |
| Thermal Shutdown Threshold | 140°C - protects against sustained overload or poor heatsinking in high-density motherboard layouts |
| Package Thermal Resistance | θJA = 40°C/W - requires PCB copper pour and ≥3 vias to EPAD for reliable operation at full load |
| Digital Input Thresholds | S3/S5 high-level ≥2.2V, low-level ≤0.8V - compatible with standard CMOS logic and ACPI SLP_S3/SLP_S5 signals |
Pinout & Package
ISL6506CBZ is housed in an 8-lead Exposed Pad Small Outline Integrated Circuit (EPSOIC) package (M8.15C), with the EPAD thermally and electrically connected to GND. The exposed pad must be soldered to a dedicated ground plane using 3–5 thermal vias for effective heat dissipation and signal integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 1) | Bias supply input | Connects to ATX 5VSB; powers internal circuitry and serves as input to 3.3VDUAL LDO; monitored for POR |
| 3V3AUX (Pin 2) | 3.3VDUAL regulated output node | Delivers 3.3V ±2% to auxiliary loads; internally regulated in S3/S4/S5; externally driven by NMOS in S0/S1/S2 |
| S3 (Pin 3) | ACPI sleep-state select input | High = S0/S1/S2 active; low = enter S3; internal 10µA pull-down prevents floating; blocks invalid transitions |
| S5 (Pin 4) | ACPI sleep-state select input | High = S0/S1/S2/S3; low = enter S4/S5; used with S3 to define full ACPI state matrix per Table 1 |
| GND (Pins 5 & EPAD) | Signal and thermal ground reference | Common return for LDO, monitoring circuits, and MOSFET gate drivers; EPAD must be tied to PCB ground plane |
| DLA (Pin 6) | Open-drain 12V gate driver | Drives gates of external N-MOSFETs (Q1/Q3); 1kΩ pull-up to 12VATX sets POR threshold and enables ATX rail switching |
| 5VDLSB (Pin 7) | P-MOSFET gate control for 5VDUAL | Switches P-MOSFET (Q2) to connect 5VSB to 5VDUAL in S3/S4/S5; draws −7.5µA during soft-start for controlled turn-on |
| N/C (Pin 8) | No-connect terminal | Not internally bonded; must remain unconnected per datasheet; no routing or decoupling required |
Key Features
| Feature | Design Value |
|---|---|
| ACPI-compliant dual-rail control | Enables precise S0–S4/S5 state transitions for 5VDUAL and 3.3VDUAL without external logic or firmware coordination |
| Integrated 3.3VDUAL LDO with 2A limit | Eliminates need for discrete 3.3V standby regulator; sustains full auxiliary load current during deep sleep (S4/S5) |
| Dual POR monitoring (5VSB & 12VATX) | Prevents premature wake-up or unstable boot by requiring both 5VSB ≥4.5V and 12VATX ≥9.8V before enabling ATX rail switching |
| Controlled soft-start (6.55–9.85ms) | Reduces peak inrush current on 3.3VDUAL and 5VDUAL rails, minimizing voltage droop and stress on bulk capacitors |
| Overtemperature shutdown (140°C) | Provides fail-safe thermal protection during sustained overload or inadequate PCB heatsinking in compact motherboard designs |
Applications
| Desktop Motherboard Power Management | ACPI-Compliant S3/S4/S5 Sleep Sequencing |
|---|---|
Use Scenario: Regulating 5VDUAL and 3.3VDUAL rails on ATX-compliant desktop motherboards supporting USB, LAN, and PCI devices. IC Role / Device Role / Timing Role: Dual-rail power controller managing rail enable/disable, voltage regulation, and state transition timing per ACPI specification. Use Value: Reduces BOM count by integrating LDO, switch controllers, and POR into one 8-pin EPSOIC; eliminates discrete 3.3VSB regulator and associated passives. |
Use Scenario: Ensuring correct power sequencing during S3 (suspend-to-RAM) and S4/S5 (hibernate/shutdown) transitions. IC Role / Device Role / Timing Role: State machine enforcing valid S0→S3→S4/S5 progression and blocking illegal S4/S5→S3 transitions. Use Value: Guarantees system stability during sleep/wake cycles by coordinating 5VDUAL retention, 3.3VDUAL regulation, and ATX rail handover timing. |
| USB Peripheral Wake-Up Support | LAN/Wake-on-LAN Auxiliary Power |
Use Scenario: Maintaining 5VDUAL rail during S3/S4/S5 to power USB host controllers for remote wake events. IC Role / Device Role / Timing Role: Keeps 5VDUAL active from 5VSB source in all sleep states, enabling USB enumeration and wake signaling. Use Value: Enables instant wake-from-suspend via keyboard/mouse without requiring full system power restoration. |
Use Scenario: Supplying stable 3.3VDUAL to Ethernet PHY and MAC during S3/S4/S5 for Wake-on-LAN functionality. IC Role / Device Role / Timing Role: Delivers regulated 3.3V ±2% at up to 2A from internal LDO, independent of main ATX 3.3V rail. Use Value: Supports continuous PHY operation and packet detection while main CPU and memory are powered down. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ACPI dual-rail power control applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6506ACBZ | 5VDUAL remains active in S4/S5; 1A 3.3VDUAL LDO current limit | Preferred where 5VDUAL must persist through hibernate (S4) and soft-off (S5) for legacy wake sources | Select ISL6506ACBZ if system requires 5VDUAL continuity in S4/S5; ISL6506CBZ shuts down 5VDUAL only in S4/S5 per ISL6506B spec |
| RT8205AZQW | Single-chip dual-buck controller (not LDO-based); supports higher efficiency but requires external inductors | Used in newer low-power platforms where efficiency >85% in S3 is critical; lacks integrated 3.3V LDO | Choose RT8205AZQW when replacing aging linear solutions with switching topology; not drop-in due to different external component set |
Compared with ISL6506ACBZ, ISL6506CBZ provides higher 3.3VDUAL current (2A vs. 1A) but matches its S4/S5 5VDUAL retention behavior; versus RT8205AZQW, ISL6506CBZ offers simpler layout and lower EMI but trades off conversion efficiency for cost and footprint savings in legacy ATX designs.
Availability
ISL6506CBZ is available at Aetrix Electronics and suitable for desktop motherboard power management, ACPI-compliant sleep-state sequencing, and USB/LAN auxiliary power applications requiring stable component supply and long-term industrial availability.
Supply support for ISL6506CBZ 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 is a global semiconductor leader specializing in microcontrollers, analog, power management, and timing solutions for industrial, automotive, and computing markets.
The ISL6506CBZ belongs to Renesas' legacy AC/DC and system power controller product line, engineered specifically for ACPI-compliant ATX motherboard power architectures requiring robust, integrated dual-rail control with minimal external components.
FAQ
What is the key functional difference between ISL6506CBZ and ISL6506ACBZ?
The ISL6506CBZ implements the ISL6506B variant behavior: it shuts down the 5VDUAL output in S4/S5 sleep states, whereas ISL6506ACBZ keeps 5VDUAL active in those states. Both share identical 2A 3.3VDUAL LDO capability, S3/S5 pin logic, and EPSOIC packaging. ISL6506CBZ is functionally identical to ISL6506BCBZ, differing only in part marking and tape-and-reel configuration.
Does ISL6506CBZ require external MOSFETs, and what types are needed?
Yes, ISL6506CBZ requires three external MOSFETs: two N-channel devices (Q1, Q3) to switch ATX 3.3V and 5V into 3.3VDUAL and 5VDUAL during active states, and one P-channel device (Q2) to connect 5VSB to 5VDUAL during S3/S4/S5. Q2 must be a logic-level P-MOSFET rated for ≥4.5V VGS(th), and all devices must support thermal dissipation under peak load conditions.
What is the purpose of the DLA pin on ISL6506CBZ, and how must it be connected?
The DLA pin on ISL6506CBZ is an open-drain output used to drive the gates of external N-MOSFETs (Q1 and Q3). It must be pulled up to the ATX 12V rail via a 1kΩ resistor - this resistor sets the 12V POR threshold and enables proper timing of ATX rail handover during wake-up. Using a different resistance alters the POR level and may cause unreliable startup.
How does ISL6506CBZ handle undervoltage on the 3.3VDUAL rail during sleep states?
During S3/S4/S5, ISL6506CBZ monitors the 3.3VDUAL rail at the 3V3AUX pin. If voltage drops below 2.475V (25% below nominal), the internal LDO disables. After one soft-start interval, it retries regulation; after three failed attempts, the LDO latches off until a full POR reset occurs - ensuring system stability without false wake-ups caused by transient brownouts.
Is ISL6506CBZ RoHS compliant and lead-free?
Yes, ISL6506CBZ is RoHS compliant and Pb-free, featuring 100% matte tin (e3) termination finish. It meets IPC/JEDEC J-STD-020 reflow requirements for lead-free soldering and is compatible with both SnPb and Pb-free assembly processes. Moisture sensitivity level (MSL) is defined per Renesas' standard classification for EPSOIC packages.
ISL6506CBZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width) 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:
- 3.6 mA
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC-EP
ISL6506CBZ FAQ
1.How can I place an order for ISL6506CBZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6506CBZ 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 ISL6506CBZ reliable?
The price and inventory of ISL6506CBZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6506CBZ is usually 5 days.
3.What payment methods are accepted for ISL6506CBZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6506CBZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6506CBZ?
ISL6506CBZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6506CBZ 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 ISL6506CBZ?
For technical support, including ISL6506CBZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6506CBZ requirements.
6.How does Aetrix verify that ISL6506CBZ is sourced from the original manufacturer or authorized distributors?
All ISL6506CBZ 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 ISL6506CBZ meets industry standards.
7.What is the process for return or replacement of ISL6506CBZ?
All ISL6506CBZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL6506CBZ, 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 ISL6506CBZ part is unused and in its original packaging.
Return procedure for ISL6506CBZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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