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Renesas ISL6506CB-T
- Part No.:
- ISL6506CB-T
- Manufacturer:
- Renesas
- Category:
- Power Supply Controllers, Monitors
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
ISL6506CB-T.pdf
- Description:
- IC MULTIPLE POWER CTRLR 8LEPSOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,933
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Product details
Overview
ISL6506CB-T from Renesas Electronics is a dual-rail ACPI-compliant linear power controller for motherboard 5VDUAL and 3.3VDUAL regulation. It integrates an internal 3.3V LDO (2A current limit), dual MOSFET gate drivers (DLA, 5VDLSB), and S3/S5 digital sleep-state control in an 8-lead EPSOIC package. It delivers precise ±2.0% 3.3VDUAL regulation during S3/S4/S5 states and supports ATX-compliant PC power sequencing.
For engineers reviewing the ISL6506CB-T datasheet, ISL6506CB-T pinout, ISL6506CB-T application, or ISL6506CB-T equivalent, key selection criteria include S4/S5 5VDUAL shutdown behavior, 2A internal LDO capability, thermal shutdown at 140°C, and compatibility with standard ATX 5VSB/12V/3.3V input rails in ACPI-compliant desktop and server motherboard designs.
Technical Context
The ISL6506CB-T implements a hybrid regulation architecture: during S0/S1/S2, it routes ATX 3.3V and 5V directly to outputs via external N-MOSFETs controlled by DLA and 5VDLSB; during S3/S4/S5, it generates 3.3VDUAL from 5VSB using its internal 2A LDO and switches 5VDUAL from 5VSB via a P-MOSFET driven by 5VDLSB. Its POR circuit monitors both 5VSB (4.5V rising threshold) and 12V (9.8V typical) rails to ensure safe wake-up sequencing.
Sleep-state logic is hardwired: S5=0/S3=0 forces S4/S5 mode where 5VDUAL is shut down (distinguishing ISL6506B from ISL6506A), while S5=1/S3=0 enables S3 mode with 5VDUAL active. Internal undervoltage protection triggers at 2.475V on 3.3VAUX, and overtemperature shutdown activates at 140°C - both verified across 0°C to +70°C ambient operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| 3.3VDUAL LDO Current Limit | 2A - supports higher auxiliary loads (e.g., LAN, PCI slots) in S3/S4/S5 sleep without external regulators. |
| 5VDUAL Behavior in S4/S5 | Shut down - reduces system standby power by disabling USB/keyboard/mouse rail when fully suspended. |
| 3.3VDUAL Regulation Accuracy | ±2.0% over temperature - ensures stable PCI/Auxiliary/LAN voltage under full thermal range (0°C to +70°C). |
| Power-On Reset Thresholds | 5VSB: 4.5V (rising), 3.6–3.95V (falling); 12V: 8.9–10.8V - prevents false wake-ups and guarantees ATX rail readiness before S0 entry. |
| Soft-Start Interval | 6.55–9.85 ms - controls inrush current during S3→S0 transition, limiting stress on external P-MOSFET Q2 and output capacitors. |
| Operating Temperature Range | 0°C to +70°C - qualified for commercial-grade motherboard environments with no derating required. |
| Thermal Resistance θJA | 40°C/W - requires EPAD grounding via ≥3 vias to internal ground plane for reliable 2A LDO operation at max ambient. |
Pinout & Package
ISL6506CB-T uses an 8-lead Exposed Pad Small Outline IC (EPSOIC) package (M8.15C), with the exposed pad thermally and electrically connected to GND. The EPAD must be soldered to a dedicated ground plane using 3–5 thermal vias for effective heat dissipation during 2A LDO operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 1) | Bias supply input | Connects to ATX 5VSB; powers internal circuitry and serves as LDO input - must be well decoupled to prevent POR glitches. |
| 3V3AUX (Pin 2) | 3.3VDUAL output node | Delivers regulated 3.3V to PCI/Auxiliary/LAN; monitored for UV (2.475V) and overcurrent (2A trip) during sleep states. |
| S3 (Pin 3) | Digital sleep-state input | Active-low signal from SLP_S3; enables S3 state (3.3VDUAL on, 5VDUAL on) when S5=1, S3=0. |
| S5 (Pin 4) | Digital sleep-state input | Active-low signal from SLP_S5; forces S4/S5 (5VDUAL off) when both S5=0 and S3=0 - distinguishes ISL6506B functionality. |
| GND (Pins 5 & EPAD) | Signal and thermal ground | Reference for all voltages; EPAD must be tied to PCB ground plane for thermal management of internal LDO. |
| DLA (Pin 6) | Open-drain 12V gate driver | Pulls gates of external N-MOSFETs (Q1/Q3) to 12V in S0 - enables direct ATX 3.3V/5V routing; requires 1kΩ pull-up to 12VATX. |
| 5VDLSB (Pin 7) | P-MOSFET gate drive | Drives gate of external P-MOSFET (Q2) to connect 5VSB to 5VDUAL in S3/S4/S5 - actively pulled high in S0 to disable Q2. |
| N/C (Pin 8) | No-connect terminal | Unbonded pin; must remain unconnected per datasheet - no routing or grounding allowed. |
Key Features
| Feature | Design Value |
|---|---|
| ACPI-compliant dual-rail control | Hardware-enforced S0/S3/S4-S5 state transitions with illegal-state blocking (e.g., S4/S5 → S3 prohibited). |
| Integrated 2A 3.3V standby LDO | Eliminates need for external 3.3V regulator in S3/S4/S5, reducing BOM count and PCB area for auxiliary power islands. |
| Programmable 5VDUAL sleep behavior | ISL6506B variant shuts down 5VDUAL in S4/S5 - critical for meeting Energy Star and ErP Lot 6 standby power requirements. |
| Dual independent gate drivers | DLA (N-MOSFET) and 5VDLSB (P-MOSFET) enable efficient, low-loss switching between ATX and standby rails with minimal external components. |
| Robust fault protection | Combined 140°C thermal shutdown, 2.475V 3.3VAUX undervoltage lockout, and soft-start current limiting prevent latch-up and component stress. |
Applications
| Desktop Motherboard Power Management | Server Baseboard Management |
|---|---|
|
Use Scenario: Regulating 5VDUAL (USB/keyboard/mouse) and 3.3VDUAL (PCI/LAN) rails on ATX-compliant desktop motherboards with ACPI S3/S4/S5 support. IC Role / Device Role / Timing Role: Dual-rail power controller managing rail activation/deactivation based on SLP_S3/SLP_S5 signals and ATX rail status monitoring. Use Value: Enables <1W S4/S5 standby power by shutting down 5VDUAL while maintaining 2A 3.3VDUAL for wake-on-LAN and PCIe hot-plug detection. |
Use Scenario: Providing auxiliary power sequencing for server baseboard management controllers (BMC) requiring persistent 3.3VDUAL in deep sleep. IC Role / Device Role / Timing Role: Standby LDO + gate driver delivering regulated 3.3V and controlled 5V switching during BMC-initiated wake events. Use Value: Guarantees ±2.0% 3.3VDUAL regulation across 0°C–70°C ambient, supporting reliable BMC firmware execution and sensor polling in S3. |
| Industrial PC Power Sequencing | Embedded Computing Platform |
|
Use Scenario: Powering industrial PCs with extended temperature tolerance and strict ACPI compliance for factory automation HMIs. IC Role / Device Role / Timing Role: AC/DC input interface controller coordinating ATX 5VSB, 12V, and 3.3V rails with hardware-based POR and soft-start timing. Use Value: 40°C/W θJA and EPAD thermal design allow continuous 2A LDO operation without heatsinks - simplifying ruggedized enclosure design. |
Use Scenario: Enabling low-power suspend/resume in fanless embedded systems using Intel Atom or AMD G-series SoCs. IC Role / Device Role / Timing Role: Sleep-state sequencer generating precise 6.55–9.85 ms soft-start intervals to prevent voltage droop during S3↔S0 transitions. Use Value: Reduces external capacitor ESR dependency by controlling gate drive slew rate - cuts total output capacitance by up to 30% vs. discrete solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-rail ACPI power controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6506ACBZ-T | Same pinout and package; maintains 5VDUAL in S4/S5 (no shutdown), 1A 3.3V LDO limit. | Required where USB/peripheral wake capability must persist in S4/S5 (e.g., remote management). | Select ISL6506ACBZ-T only if S4/S5 5VDUAL continuity is mandatory; otherwise ISL6506CB-T reduces standby power. |
| RT8205AZSP | Single-chip buck+LDO solution; 3.3V LDO rated at 1.5A; no native S4/S5 5VDUAL shutdown logic. | Targets cost-sensitive designs needing integrated DC/DC conversion, not pure ACPI rail switching. | Choose RT8205AZSP only when replacing both ATX linear controller and primary 3.3V buck regulator - not a drop-in replacement. |
Compared with ISL6506ACBZ-T, ISL6506CB-T reduces S4/S5 standby power by disabling 5VDUAL, while its 2A LDO supports higher auxiliary loads; versus RT8205AZSP, ISL6506CB-T offers hardware-enforced ACPI state logic and superior 3.3VDUAL regulation accuracy (±2.0% vs. ±3.0%) in sleep modes.
Availability
ISL6506CB-T is available at Aetrix Electronics and suitable for desktop motherboard power management, server baseboard management, industrial PC power sequencing, and embedded computing platform designs requiring stable component supply and long-term lifecycle support.
Supply support for ISL6506CB-T 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 connectivity solutions for automotive, industrial, and computing markets.
The ISL6506 series belongs to Renesas' legacy power management portfolio designed specifically for ACPI-compliant PC and server motherboard power sequencing - emphasizing low-quiescent-current sleep operation and robust ATX rail interoperability.
FAQ
What is the key functional difference between ISL6506CB-T and ISL6506ACBZ-T?
The ISL6506CB-T shuts down the 5VDUAL output in S4/S5 sleep states, while the ISL6506ACBZ-T keeps 5VDUAL active. This makes ISL6506CB-T ideal for Energy Star-compliant systems requiring ultra-low standby power. Both share identical pinout, 8-lead EPSOIC packaging, and 2A/1A 3.3VDUAL LDO ratings respectively - ISL6506CB-T's LDO is rated at 2A, matching its part number suffix "B".
Does ISL6506CB-T require external MOSFETs, and what types are needed?
Yes, ISL6506CB-T requires three external MOSFETs: two N-channel devices (Q1, Q3) for connecting ATX 3.3V/5V to outputs in S0, and one P-channel device (Q2) for connecting 5VSB to 5VDUAL in S3/S4/S5. Q2 must be a logic-level P-MOSFET capable of full enhancement with ≤4.5V VGS, as specified in the ISL6506CB-T datasheet for reliable S3/S4/S5 operation.
How does ISL6506CB-T handle power-on reset and rail sequencing?
ISL6506CB-T performs dual-rail POR: it monitors 5VSB (rising threshold 4.5V) and 12VATX (rising threshold 9.8V typical) independently. Only after both rails exceed their thresholds does it release the S0 state - preventing premature wake-up if 12V lags. This ensures coordinated ramp-up of ATX supplies before enabling DLA and disabling 5VDLSB, guaranteeing safe power delivery to downstream loads.
What thermal design practices are required for ISL6506CB-T's 2A LDO operation?
To sustain 2A continuous current from the internal 3.3V LDO, ISL6506CB-T requires its EPAD to be soldered to a solid internal ground plane using at least three 0.3mm-diameter thermal vias. The datasheet specifies θJA = 40°C/W - without proper EPAD grounding, junction temperature can exceed 125°C even at 70°C ambient. Layout guidelines also mandate short, wide traces from VCC to bulk decoupling caps to minimize 5VSB impedance.
Can ISL6506CB-T be used in non-ACPI applications such as custom embedded power systems?
Yes, ISL6506CB-T can be deployed in non-ACPI systems by hardwiring S3 and S5 pins to fixed logic levels: tie both high (S3=5V, S5=5V) for permanent S0 operation, or tie S5 low to force S4/S5 shutdown of 5VDUAL regardless of S3. Its internal LDO, gate drivers, and protection features remain fully functional - but ACPI-specific timing (e.g., 60µs S0→S3 delay) and illegal-state blocking are retained in silicon.
ISL6506CB-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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
ISL6506CB-T FAQ
1.How can I place an order for ISL6506CB-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6506CB-T 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 ISL6506CB-T reliable?
The price and inventory of ISL6506CB-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6506CB-T is usually 5 days.
3.What payment methods are accepted for ISL6506CB-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6506CB-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6506CB-T?
ISL6506CB-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6506CB-T 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 ISL6506CB-T?
For technical support, including ISL6506CB-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6506CB-T requirements.
6.How does Aetrix verify that ISL6506CB-T is sourced from the original manufacturer or authorized distributors?
All ISL6506CB-T 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 ISL6506CB-T meets industry standards.
7.What is the process for return or replacement of ISL6506CB-T?
All ISL6506CB-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL6506CB-T, 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 ISL6506CB-T part is unused and in its original packaging.
Return procedure for ISL6506CB-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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