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Renesas ISL6506BCBZA
- Part No.:
- ISL6506BCBZA
- Manufacturer:
- Renesas
- Category:
- Power Supply Controllers, Monitors
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
ISL6506BCBZA.pdf
- Description:
- IC PWR SUPPLY CTRLR/MONITR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,128
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Product details
Overview
ISL6506BCBZA from Renesas Electronics is a dual-rail ACPI-compliant linear power controller for motherboard 5VDUAL and 3.3VDUAL regulation, featuring S3/S4/S5 sleep-state control via digital S3/S5 inputs, 2A internal 3.3V LDO output current capability, ±2.0% regulation over temperature, and integrated over-temperature shutdown. It operates in 0°C to +70°C ambient, uses an 8-lead EPSOIC package with exposed pad, and supports ATX-compliant PC power sequencing.
For engineers reviewing the ISL6506BCBZA datasheet, ISL6506BCBZA pinout, ISL6506BCBZA application, or ISL6506BCBZA equivalent, this page delivers verified technical context, pin-level circuit roles, real-world ACPI sleep-state behavior (including S4/S5 5VDUAL shutdown), thermal and electrical specifications, and validated alternative parts for motherboard power design validation and BOM optimization.
Technical Context
The ISL6506BCBZA implements dual-output ACPI state management: it switches the 5VDUAL rail between ATX 5V (S0/S1/S2) and 5VSB (S3 only), while shutting down 5VDUAL entirely in S4/S5 - a key functional distinction from the ISL6506A. Its internal 3.3VDUAL LDO delivers up to 2A with ±2.0% regulation accuracy across temperature and includes undervoltage lockout at 2.475V.
Control logic enforces valid state transitions (e.g., blocks S4/S5 → S3), integrates 60µs S0→S3 delay, and uses DLA (open-drain) and 5VDLSB (gate-drive) outputs to manage external N-MOSFETs (Q1/Q3) and P-MOSFET (Q2). Soft-start timing is fixed at 6.55–9.85ms, with 7.5µA current sourcing into 5VDLSB during ramp-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| 3.3VDUAL Output Current | 2A max - enables full-power auxiliary PCI/LAN/USB loads in S3/S4/S5 sleep states without external regulators. |
| 3.3VDUAL Regulation Accuracy | ±2.0% over temperature - ensures stable 3.3V operation for sensitive I/O peripherals during thermal cycling. |
| 5VDUAL Sleep Behavior | Shut down in S4/S5 - reduces system standby power by fully disabling 5VDUAL rail when not required. |
| VCC Supply Current | 4.6mA max in S3/S5 - low quiescent draw preserves 5VSB battery life in extended sleep modes. |
| Soft-Start Interval | 6.55–9.85ms - controls inrush during wake-up, preventing voltage droop on 3.3VDUAL and 5VDUAL rails. |
| Operating Temperature Range | 0°C to +70°C - matches commercial-grade ATX motherboard thermal envelope requirements. |
| Package Thermal Resistance | θJA = 40°C/W - requires minimal PCB copper area for thermal management in standard 4-layer designs. |
Pinout & Package
ISL6506BCBZA uses an 8-lead Exposed Pad Small Outline Integrated Circuit (EPSOIC) package (M8.15C), with the EPAD thermally and electrically connected to GND for enhanced heat dissipation and noise immunity.
| 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 at 4.5V rising threshold. |
| 3V3AUX (Pin 2) | 3.3VDUAL output node | Delivers regulated 3.3V to auxiliary loads; internally sourced in S3/S4/S5, externally switched in S0/S1/S2 via NMOS Q1. |
| S3 (Pin 3) | Digital sleep-state input | Active-low signal indicating S3 state; internal 10µA pull-down ensures default S0 operation if unconnected. |
| S5 (Pin 4) | Digital sleep-state input | Active-low signal indicating S4/S5 state; combined with S3, defines ACPI power state per truth table. |
| GND (Pins 5 & EPAD) | Signal and thermal ground | Reference for all voltages and return path for 3.3VDUAL LDO; EPAD must be tied to ground plane with ≥3 vias for thermal integrity. |
| DLA (Pin 6) | Open-drain 12V gate driver | Drives gates of Q1/Q3 NMOS transistors; pulled high via 1kΩ to 12VATX - POR level depends on resistor value. |
| 5VDLSB (Pin 7) | P-MOSFET gate control | Drives Q2 gate to connect 5VSB to 5VDUAL in S3; actively pulled high in S0/S1/S2 to disable Q2 and enable ATX 5V path. |
| N/C (Pin 8) | No-connect terminal | Unused pin - must remain unconnected per datasheet; no internal connection or function. |
Key Features
| Feature | Design Value |
|---|---|
| ACPI-compliant dual-rail control | Enables precise S0–S5 state transitions with hardware-enforced invalid-state blocking (e.g., S4/S5 → S3 prohibited). |
| Integrated 2A 3.3VDUAL LDO | Eliminates need for external 3.3V regulator in sleep states, reducing component count and board space on ATX motherboards. |
| S4/S5 5VDUAL shutdown | Reduces system standby power consumption by fully disconnecting 5VDUAL rail when only 3.3VDUAL is required. |
| Over-temperature shutdown | Triggers at 140°C junction temperature - protects IC and surrounding components during sustained overload or poor airflow. |
| Pb-free RoHS-compliant packaging | Meets IPC/JEDEC J-STD-020 reflow standards for lead-free assembly and supports both SnPb and Pb-free soldering processes. |
Applications
| Desktop Motherboard Power Management | Embedded PC Platform Regulation |
|---|---|
|
Use Scenario: Regulating 3.3VDUAL and 5VDUAL rails on x86-based ATX motherboards supporting ACPI S3 (suspend-to-RAM) and S4/S5 (hibernate/off) states. IC Role / Device Role / Timing Role: Dual-output linear controller managing rail enable/disable sequencing, soft-start timing, and sleep-state transitions under direct SLP_S3/SLP_S5 command. Use Value: Enables compliant S4/S5 power gating with zero external components for 3.3VDUAL generation and controlled 5VDUAL shutdown - critical for Energy Star and ErP Lot 6 compliance. |
Use Scenario: Providing auxiliary power to LAN, USB, and PCIe slots in fanless embedded PCs requiring reliable wake-from-sleep functionality. IC Role / Device Role / Timing Role: Standby power supervisor delivering regulated 3.3V at 2A during S3 and maintaining system responsiveness via fast wake-up timing (60µs S0→S3 delay). Use Value: Guarantees ±2.0% 3.3VDUAL regulation across 0°C–70°C, ensuring stable PHY and controller operation without derating or margining. |
| Industrial Control Panel Power Sequencing | Thin Client Power Architecture |
|
Use Scenario: Managing auxiliary power domains in DIN-rail mounted control panels where ATX-style power supplies interface with legacy I/O modules. IC Role / Device Role / Timing Role: ACPI-compatible voltage switch controller coordinating 5V/3.3V delivery with 12V POR monitoring and thermal fault response. Use Value: Integrates 12V rail monitoring (via DLA 1kΩ resistor) and over-temperature shutdown - eliminates need for discrete supervisors in compact panel designs. |
Use Scenario: Enabling always-on USB keyboard/mouse and network wake in thin clients using low-power ATX PSUs. IC Role / Device Role / Timing Role: Dual-rail controller delivering 5VDUAL to USB ports (S3 active) and 3.3VDUAL to Ethernet PHY (S4/S5 active), with strict S4/S5 5VDUAL disable. Use Value: Reduces standby power by >150mW versus solutions retaining 5VDUAL in S4/S5 - extends PSU efficiency rating and lowers thermal load. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-rail ACPI power control applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6506ACBZA | Same pinout and package; maintains 5VDUAL output in S4/S5 (no shutdown), 1A 3.3VDUAL LDO limit. | Suitable for systems requiring persistent 5VDUAL during hibernate (e.g., remote management controllers needing always-on USB). | Select ISL6506ACBZA only if S4/S5 5VDUAL continuity is mandatory; otherwise ISL6506BCBZA provides lower standby power. |
| RT8205AZQW | Single-chip dual-buck controller (not linear); supports higher 3.3V/5V output currents (>3A), no integrated S3/S5 logic - requires external ACPI state machine. | Used in modern low-power platforms where efficiency >85% in S0 is prioritized over simplicity; lacks native S4/S5 5VDUAL disable. | Choose RT8205AZQW for high-efficiency active-state operation; ISL6506BCBZA remains optimal for cost-sensitive, low-component-count ACPI sleep compliance. |
Compared with ISL6506ACBZA, ISL6506BCBZA reduces S4/S5 standby power by eliminating 5VDUAL leakage; compared with RT8205AZQW, it delivers simpler, self-contained ACPI sequencing without firmware or external logic - ideal for legacy ATX and entry-level embedded designs.
Availability
ISL6506BCBZA is available at Aetrix Electronics and suitable for desktop motherboard power management, embedded PC platform regulation, industrial control panel power sequencing, and thin client power architecture requiring stable component supply and long-term lifecycle support.
Supply support for ISL6506BCBZA 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, and timing solutions for industrial, automotive, and computing markets.
The ISL6506B belongs to Renesas' ACPI power controller product line, designed specifically to simplify ATX-compliant motherboard power sequencing with integrated sleep-state logic, dual-rail regulation, and thermal protection - targeting cost-sensitive, high-volume PC and embedded computing applications.
FAQ
What is the key functional difference between ISL6506BCBZA and ISL6506ACBZA?
The ISL6506BCBZA shuts down the 5VDUAL output in S4/S5 sleep states, while the ISL6506ACBZA keeps 5VDUAL active. This makes ISL6506BCBZA preferable for low-standby-power designs. Both share identical pinout, package, and 8-lead EPSOIC footprint, but ISL6506BCBZA also features a 2A 3.3VDUAL LDO versus 1A in ISL6506ACBZA. The ISL6506BCBZA datasheet confirms this behavior in Table 1 and Figure 1.
Does ISL6506BCBZA require external MOSFETs, and if so, what types?
Yes, ISL6506BCBZA requires three external MOSFETs: two N-channel devices (Q1, Q3) to switch ATX 3.3V and 5V into 3.3VDUAL and 5VDUAL during S0/S1/S2, and one P-channel device (Q2) to connect 5VSB to 5VDUAL in S3. Q2 must be a logic-level P-MOSFET rated for ≤4.5V VGS, as specified in the ISL6506BCBZA datasheet Section "Transistor Selection/Considerations".
What is the purpose of the DLA pin on ISL6506BCBZA, and how is it used?
The DLA pin on ISL6506BCBZA is an open-drain output used to drive the gates of external N-MOSFETs (Q1 and Q3) via a 1kΩ pull-up to the ATX 12V rail. It also serves as the 12V power-on reset (POR) monitor - the POR threshold depends on the pull-up resistor value. During normal operation, DLA goes high-impedance to allow 12V to enhance Q1/Q3; during faults or reset, it pulls low to disable them.
How does ISL6506BCBZA handle overcurrent on its internal 3.3VDUAL LDO?
When overcurrent is detected on the ISL6506BCBZA's internal 3.3VDUAL LDO, the gate drive to the NMOS pass element is reduced, causing output voltage to drop. If voltage falls to the undervoltage threshold (2.475V), the LDO shuts down. After one soft-start interval, it retries; after three failed retries, it latches off until a full POR reset occurs - a behavior explicitly defined in the ISL6506BCBZA datasheet Section "Internal Linear Regulator Overcurrent Protection".
Is ISL6506BCBZA RoHS-compliant and compatible with lead-free reflow?
Yes, ISL6506BCBZA is Pb-free and RoHS-compliant, using 100% matte tin (e3) termination finish. It meets or exceeds IPC/JEDEC J-STD-020 moisture sensitivity and Pb-free reflow requirements, including peak temperatures up to 260°C. The ISL6506BCBZA datasheet confirms this in Notes 2 and 3 of the Ordering Information table and references TB493 for the exact reflow profile.
ISL6506BCBZA 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
ISL6506BCBZA FAQ
1.How can I place an order for ISL6506BCBZA through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6506BCBZA 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 ISL6506BCBZA reliable?
The price and inventory of ISL6506BCBZA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6506BCBZA is usually 5 days.
3.What payment methods are accepted for ISL6506BCBZA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6506BCBZA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6506BCBZA?
ISL6506BCBZA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6506BCBZA 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 ISL6506BCBZA?
For technical support, including ISL6506BCBZA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6506BCBZA requirements.
6.How does Aetrix verify that ISL6506BCBZA is sourced from the original manufacturer or authorized distributors?
All ISL6506BCBZA 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 ISL6506BCBZA meets industry standards.
7.What is the process for return or replacement of ISL6506BCBZA?
All ISL6506BCBZA units undergo pre-shipment inspection (PSI). If there is an issue with ISL6506BCBZA, 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 ISL6506BCBZA part is unused and in its original packaging.
Return procedure for ISL6506BCBZA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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