My Inquiry
My Account
Renesas ISL6506BIBZ-T
- Part No.:
- ISL6506BIBZ-T
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
ISL6506BIBZ-T.pdf
- Description:
- IC REG CTRLR ACPI 2OUT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,281
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ISL6506BIBZ-T from Renesas (formerly Intersil) 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 2A 3.3V LDO, dual switch controllers for 5V/3.3V ATX rail switching, and digital S3/S5 state selection - enabling precise sleep-state power sequencing in S0/S3/S4-S5 modes.
For engineers reviewing the ISL6506BIBZ-T datasheet, ISL6506BIBZ-T pinout, ISL6506BIBZ-T application, or ISL6506BIBZ-T equivalent, this device is critical for ACPI-compliant power sequencing where ±2.0% 3.3VDUAL regulation in S3/S4/S5, 5VDUAL shutdown in S4/S5, and 8-lead EPSOIC thermal performance are key selection criteria.
Technical Context
The ISL6506BIBZ-T implements dual-path regulation: during S0/S1/S2, it uses external N-MOSFETs to connect ATX 3.3V/5V rails directly to outputs; during S3, it enables internal 3.3V LDO from 5VSB and switches 5VDUAL via external P-MOSFET using 5VDLSB gate drive. Its DLA pin provides open-drain 12V-based enhancement control for NMOS pass devices and monitors 12V POR at 8.9–11V threshold.
It features digital soft-start (6.55–9.85 ms), overtemperature shutdown at 140°C, undervoltage protection on 3.3VAUX (2.5V trip), and internal 10µA pull-down on S3/S5 pins - all synchronized to ACPI-defined state transitions while blocking illegal S4/S5→S3 sequences.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Temp Range | −40°C to +85°C - supports industrial-grade motherboard operation without derating |
| 3.3VDUAL Regulation Accuracy | ±2.0% over temperature - ensures PCI/LAN auxiliary rail compliance in S3/S4/S5 sleep states |
| Internal LDO Current Limit | 2A - sustains full-load 3.3VDUAL delivery during S3/S4/S5 from 5VSB supply |
| 5VDUAL State Control | Active in S0/S1/S2; enabled in S3 via P-MOSFET; shut down in S4/S5 - enforces ACPI power policy |
| Soft-Start Interval | 6.55–9.85 ms - prevents inrush current during wake-up transitions and stabilizes rail ramp-up |
| Power-On Reset Thresholds | 5VSB POR: 4.5V (rising), 3.6–3.95V (falling); 12V POR: 8.9–11V - ensures reliable initialization only when ATX rails are valid |
| S3/S5 Input Thresholds | High: ≥2.2V; Low: ≤0.8V - compatible with standard CMOS logic levels from chipset sleep controllers |
Pinout & Package
ISL6506BIBZ-T is housed in an 8-lead Exposed Pad Small Outline Integrated Circuit (EPSOIC) package (M8.15C), featuring a thermally enhanced EPAD tied to GND for efficient heat dissipation in high-current linear regulation applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 1) | Bias supply input | Connects to ATX 5VSB; powers internal circuitry and serves as input to 3.3V LDO - monitored for POR |
| 3V3AUX (Pin 2) | 3.3VDUAL output node | Delivers regulated 3.3V in S3/S4/S5 via internal LDO; connected to ATX 3.3V in S0/S1/S2 via external NMOS |
| S3 (Pin 3) | Digital sleep-state select | Input with 10µA internal pull-down; asserts S3 state when low; blocks illegal S4/S5→S3 transitions |
| S5 (Pin 4) | Digital sleep-state select | Input with 10µA internal pull-down; asserts S4/S5 state when low; disables 5VDUAL output |
| GND (Pins 5 & EPAD) | Signal and thermal ground | Reference for all voltages; return path for 3.3V LDO current; EPAD must be connected to ground plane via ≥3 vias |
| DLA (Pin 6) | Open-drain 12V enable output | Drives gates of external NMOS transistors; used for 12V POR monitoring via 1kΩ resistor to ATX 12V |
| 5VDLSB (Pin 7) | P-MOSFET gate driver | Drives gate of external P-MOSFET to connect 5VSB to 5VDUAL only in S3 state |
| N/C (Pin 8) | No-connect | Not internally bonded - must remain unconnected per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| ACPI-compliant dual-rail control | Manages both 5VDUAL (USB/keyboard/mouse) and 3.3VDUAL/3.3VSB (PCI/auxiliary/LAN) with state-specific switching logic |
| Integrated 3.3V standby LDO | 2A capability with ±2.0% regulation over temperature - eliminates need for discrete 3.3VSB regulator in S3/S4/S5 |
| Digital soft-start timing | 6.55–9.85 ms interval - prevents output overshoot and reduces stress on external MOSFETs during wake transitions |
| Thermal shutdown protection | 140°C junction threshold - halts operation before silicon damage, supporting safe motherboard thermal design |
| Undervoltage lockout on 3.3VAUX | 2.5V trip point active only in sleep states - prevents brownout-induced system instability during S3/S4/S5 |
| Pb-free RoHS-compliant packaging | 8-lead EPSOIC with matte tin (e3) termination - compatible with SnPb and Pb-free reflow profiles per J-STD-020 |
Applications
| Desktop Motherboard Power Sequencing | ACPI-Compliant S3 Sleep Mode Support |
|---|---|
Use Scenario: Managing power delivery to USB ports, keyboard/mouse controllers, and LAN PHY during system suspend/resume cycles on ATX desktop motherboards. IC Role / Device Role / Timing Role: Dual-rail controller that switches 5VDUAL and 3.3VDUAL based on S3/S5 signals, ensuring correct rail activation/shutdown per ACPI specification. Use Value: Enables zero-power USB wake events and maintains LAN link integrity in S3 by sustaining 3.3VDUAL at ±2.0% accuracy from 5VSB. |
Use Scenario: Providing stable 3.3VDUAL and controlled 5VDUAL during S3 (suspend-to-RAM) state on legacy x86 platforms. IC Role / Device Role / Timing Role: Internal 2A LDO regulates 3.3VDUAL from 5VSB; 5VDLSB drives P-MOSFET to route 5VSB to 5VDUAL - both active only in S3. Use Value: Delivers full 2A 3.3VDUAL load current with <2% error in S3, eliminating need for secondary regulators and reducing BOM count. |
| S4/S5 Deep Sleep Power Management | ATX Power Supply Interface Coordination |
Use Scenario: Enforcing complete 5VDUAL shutdown while maintaining minimal 3.3VDUAL bias for RTC and wake-on-LAN circuitry in S4/S5 (hibernate/off) states. IC Role / Device Role / Timing Role: Disables 5VDUAL output entirely in S4/S5; keeps 3.3VDUAL active via internal LDO - controlled solely by S5=0. Use Value: Achieves sub-100mW system standby power by eliminating 5VDUAL leakage and limiting 3.3VDUAL to essential functions. |
Use Scenario: Coordinating ATX 12V, 5V, 3.3V, and 5VSB rail availability during power-on reset and state transitions. IC Role / Device Role / Timing Role: Uses DLA pin to monitor 12V POR (8.9–11V) and synchronize wake-up only after all ATX rails are stable. Use Value: Prevents premature S0 entry and ensures robust power sequencing - critical for BIOS initialization and memory training stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ACPI-controlled dual-rail power management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6506CRZ-T | Same pinout and function but rated for −10°C to +85°C; lacks extended −40°C low-temp qualification | Not suitable for industrial or wide-temp motherboard designs requiring full −40°C startup | Select only for commercial-temperature desktop boards where cost optimization outweighs temp margin |
| RT8205AZQW | Single-chip solution with integrated 5V/3.3V synchronous buck controllers; no LDO-based 3.3VDUAL path | Replaces linear regulation with switching efficiency - higher complexity but lower thermal load | Choose when board space and thermal budget constrain use of external MOSFETs and linear regulation |
Compared with ISL6506BIBZ-T, ISL6506CRZ-T offers identical functionality at reduced temperature range, while RT8205AZQW replaces linear 3.3VDUAL generation with switching topology - trading simplicity and S3 regulation accuracy for higher efficiency and smaller solution size.
Availability
ISL6506BIBZ-T is available at Aetrix Electronics and suitable for desktop motherboard power sequencing, ACPI S3/S4/S5 state management, and ATX-compliant auxiliary rail regulation requiring stable component supply across long-lifecycle industrial and embedded computing programs.
Supply support for ISL6506BIBZ-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 Corporation (acquired Intersil in 2017) is a global semiconductor leader specializing in microcontrollers, analog power management, and timing solutions for automotive, industrial, and computing markets.
The ISL6506BIBZ-T belongs to Renesas' legacy ACPI power controller product line, engineered specifically for ATX motherboard designers needing precise, low-component-count dual-rail sequencing with guaranteed S3/S4/S5 compliance and thermal robustness.
FAQ
What is the primary function of the ISL6506BIBZ-T in an ATX motherboard design?
The ISL6506BIBZ-T serves as an ACPI-compliant dual-rail power controller managing 5VDUAL and 3.3VDUAL outputs. In active states (S0/S1/S2), it routes ATX 5V/3.3V through external MOSFETs; in S3, it enables internal 2A 3.3V LDO from 5VSB and drives a P-MOSFET for 5VDUAL; in S4/S5, it shuts down 5VDUAL while sustaining 3.3VDUAL. This ensures strict adherence to ACPI power state definitions without external logic.
Does the ISL6506BIBZ-T integrate both 3.3VDUAL and 5VDUAL regulation, or does it require external components?
The ISL6506BIBZ-T integrates a 2A 3.3V LDO for 3.3VDUAL regulation in sleep states but relies on external MOSFETs for 5VDUAL and active-state 3.3VDUAL delivery. Specifically, it requires one P-MOSFET (for 5VDUAL in S3), two N-MOSFETs (for 3.3V/5V routing in S0/S1/S2), and a 1kΩ resistor from DLA to ATX 12V for POR monitoring - making it a controller-plus-LDO hybrid, not a fully integrated regulator.
What are the exact voltage thresholds monitored by the ISL6506BIBZ-T for power-on reset (POR)?
The ISL6506BIBZ-T monitors two POR thresholds: rising 5VSB must exceed 4.5V to initiate startup, and falling 5VSB must drop below 3.6–3.95V to trigger reset; simultaneously, the 12V rail is monitored via DLA with a rising threshold of 8.9–11V. Both conditions must be satisfied before entering S0 - ensuring ATX supplies are fully stabilized prior to system wake-up.
How does the ISL6506BIBZ-T handle undervoltage on the 3.3VDUAL rail during sleep states?
The ISL6506BIBZ-T activates undervoltage protection on 3.3VDUAL only during S3/S4/S5 sleep states, with a fixed 2.5V trip point (25% below nominal). Upon detection, the internal LDO is disabled, then retried once after one soft-start interval. If undervoltage recurs three times, the LDO locks out until a full POR reset occurs - preventing repeated failed attempts that could destabilize auxiliary circuits.
Is the ISL6506BIBZ-T still recommended for new designs, and what is its lifecycle status?
No - the ISL6506BIBZ-T is marked "NOT RECOMMENDED FOR NEW DESIGNS" in its official datasheet (FN7814 Rev 2.00), with no recommended replacement provided by Renesas. It remains available for legacy support and existing production, but designers should evaluate modern alternatives like RT8205AZQW or ISL6506CRZ-T for new projects, noting that ISL6506CRZ-T lacks −40°C qualification.
ISL6506BIBZ-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
- Applications:
- Controller, ACPI
- Voltage - Input:
- 4.75V ~ 5.25V
- Number of Outputs:
- 2
- Voltage - Output:
- 3.3V, 5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC-EP
ISL6506BIBZ-T FAQ
1.How can I place an order for ISL6506BIBZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6506BIBZ-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 ISL6506BIBZ-T reliable?
The price and inventory of ISL6506BIBZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6506BIBZ-T is usually 5 days.
3.What payment methods are accepted for ISL6506BIBZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6506BIBZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6506BIBZ-T?
ISL6506BIBZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6506BIBZ-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 ISL6506BIBZ-T?
For technical support, including ISL6506BIBZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6506BIBZ-T requirements.
6.How does Aetrix verify that ISL6506BIBZ-T is sourced from the original manufacturer or authorized distributors?
All ISL6506BIBZ-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 ISL6506BIBZ-T meets industry standards.
7.What is the process for return or replacement of ISL6506BIBZ-T?
All ISL6506BIBZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL6506BIBZ-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 ISL6506BIBZ-T part is unused and in its original packaging.
Return procedure for ISL6506BIBZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL6506BIBZ-T Tags
-
TPS51206DSQR
Texas Instruments
-
TPS51200DRCR
Texas Instruments
-
TPS51200DRCT
Texas Instruments
-
TPS62740DSSR
Texas Instruments
-
TPS51100DGQR
Texas Instruments
-
NCP51200MNTXG
onsemi
-
NCP51400MNTXG
onsemi
-
RT9026GSP
Richtek USA Inc.
-
LP2998MRX/NOPB
Texas Instruments
-
TPS51200QDRCRQ1
Texas Instruments
-
DPA423GN-TL
Power Integrations
-
LM10011SD/NOPB
Texas Instruments
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
