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Renesas ISL6405EEBZ
- Part No.:
- ISL6405EEBZ
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
ISL6405EEBZ.pdf
- Description:
- IC REG CONV SATELLIT 2OUT 28SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,386
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Product details
Overview
ISL6405EEBZ from Intersil is a dual-output LNB supply and control voltage regulator with integrated I²C interface, designed for satellite set-top box applications requiring simultaneous 13V/18V power delivery and 22kHz tone generation to two low-noise blocks (LNBs). It integrates two current-mode boost PWMs, two low-noise linear regulators, DiSEqC-compliant 22kHz tone circuitry, and digital cable length compensation (±1V), delivering up to 750mA per channel at ≤1.2V dropout.
For engineers reviewing the ISL6405EEBZ datasheet, ISL6405EEBZ pinout, ISL6405EEBZ application, or ISL6405EEBZ equivalent, this device serves as a single-chip solution for dual-tuner satellite receiver power and control - supporting remote I²C voltage selection, dynamic overcurrent protection, thermal shutdown, and DSQIN-pin-based DiSEqC burst encoding without external components.
Technical Context
The ISL6405EEBZ implements two independent current-mode boost PWMs feeding low-dropout linear regulators, maintaining constant ~1.2V headroom across pass elements to minimize dissipation while enabling coaxial cable voltage drop compensation via LLC bits. Its internal 220kHz oscillator drives both PWMs and is factory-trimmed to generate a precise 22kHz tone for DiSEqC compliance.
I²C control operates at up to 400kHz with a fixed slave address (000100XX), supporting full read/write access to two 8-bit system registers (SR1/SR2) that configure VSEL, LLC, ENT, DCL, ISEL, EN, and report OLF/OTF diagnostic flags. The EPSOIC-28 package features exposed pad thermal enhancement and supports 3.3V/5V logic-level operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 13V or 18V per channel (I²C-selectable); +1V line-length compensation available |
| Output Current | 750mA continuous per channel; digitally programmable overcurrent limit (425mA/775mA) |
| Tone Frequency | 22kHz ±10% (factory-trimmed, DiSEqC-compliant); enabled via I²C ENT bit or DSQIN pin |
| Efficiency | >92% for boost PWM stage; minimized linear regulator dissipation via adaptive VSW regulation |
| I²C Interface | Slave address 000100XX; 3.3V/5V compatible; up to 400kHz fast-mode operation |
| Thermal Protection | Junction shutdown at 150°C (typ.), hysteresis ~20°C; OTF flag reported via I²C SR2 |
| Operating Range | VCC = 8V–14V; ambient temperature –20°C to +85°C; UVLO threshold 7.5V (start) |
Pinout & Package
ISL6405EEBZ uses a 28-lead Exposed Pad Small Outline Integrated Circuit (EPSOIC) package per JEDEC MO-220 M28.3B, with thermal pad on underside for enhanced heat dissipation. Pin count and layout match ISL6405EEB; Pb-free finish designated by "Z" suffix.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Main power supply input | Accepts 8V–14V input; powers internal circuitry and charge pump |
| VO1, VO2 | Dual regulated LNB output terminals | Deliver 13V/18V ±2.6% to LNB-A/LNB-B via coaxial cable; support simultaneous dual-tuner operation |
| SCL, SDA | I²C serial clock/data lines | Enable remote configuration of voltage, tone, enable, and protection settings; open-drain, pull-up required |
| DSQIN1, DSQIN2 | DiSEqC tone enable inputs | Direct hardware control of 22kHz modulation per channel; overrides I²C ENT when asserted high |
| EN1, EN2 | Independent shutdown controls | Disable respective PWM + linear regulator pair; enter low-quiescent standby mode (<3mA total) |
| TCAP1, TCAP2 | Output slew rate timing capacitors | Set rise/fall time (~3400 × C value); 1µF typical ensures safe 13V→19V transition into 120µF VSW cap |
Key Features
| Feature | Design Value |
|---|---|
| True dual-channel architecture | Independent I²C control of VSEL/LLC/ENT/EN per channel enables asymmetric LNB configurations (e.g., 13V+18V) |
| Integrated DiSEqC 22kHz tone generator | Factory-trimmed oscillator eliminates external crystal; supports burst encoding via DSQIN pins for EUTELSAT compliance |
| Digital cable length compensation | LLC bit adds +1V to selected output (13V→14V, 18V→19V) to offset coaxial voltage drop without analog trimming |
| Dynamic overcurrent protection | Configurable DCL mode cycles output OFF for 900ms / ON for 20ms during overload, reducing average power dissipation in short-circuit |
| Diagnostic visibility via I²C | OLF1/OLF2 and OTF flags readable in SR1/SR2 provide real-time fault status without external monitoring circuitry |
Applications
| Single-Dish Dual-Tuner STB | Multi-Satellite DiSEqC Switch Control |
|---|---|
|
Use Scenario: One satellite dish feeds two independent tuners in a PVR-enabled set-top box, requiring separate LNB power and band switching. IC Role / Device Role / Timing Role: ISL6405EEBZ supplies 13V to LNB-A and 18V to LNB-B simultaneously while generating synchronized 22kHz tones for vertical/horizontal polarization selection. Use Value: Eliminates need for discrete DC-DC + linear + tone generator ICs; reduces BOM count and PCB area by >40% versus discrete solutions. |
Use Scenario: A universal LNB setup uses DiSEqC 1.0/1.1 protocol to switch between multiple orbital positions (e.g., 19.2°E and 13°E) via a multi-switch. IC Role / Device Role / Timing Role: ISL6405EEBZ delivers stable 18V to primary LNB and injects precisely timed 22kHz bursts via DSQIN1/2 to command DiSEqC switches. Use Value: Burst response <14µs rise/fall time ensures reliable DiSEqC packet transmission; I²C register read-back confirms command execution. |
| Legacy LNB Power Management | Coaxial Cable Drop Compensation |
|
Use Scenario: Retrofitting older satellite receivers with non-DiSEqC LNBs that require only fixed 13V/18V bias without tone injection. IC Role / Device Role / Timing Role: ISL6405EEBZ operates in static mode (ENT=0) with VSEL bits setting output voltage; DSQIN pins left unconnected. Use Value: Full I²C configurability allows firmware-driven voltage selection without hardware changes - supports global LNB variants in one design. |
Use Scenario: Long coaxial runs (>50m) in commercial installations cause excessive voltage drop at LNB input, risking brownout. IC Role / Device Role / Timing Role: ISL6405EEBZ applies +1V LLC compensation to nominal 13V/18V outputs, maintaining ≥12.7V/≥17.6V at LNB under full load. Use Value: Digital compensation avoids manual resistor adjustments; preserves regulation accuracy across temperature and input voltage variation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LNB supply and control applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6405ERZ | 32-lead 5×5mm QFN package with SEL18V1/SEL18V2 pins for hardware voltage override; lower θJA (34°C/W) than EPSOIC | Requires PCB redesign; supports pin-strapped 13V/18V selection without I²C initialization | Choose ISL6405ERZ when board space is constrained and hardware-selectable voltage simplifies boot sequence. |
| MAX2105ETJ+ | Single-channel LNB controller; no integrated tone generator; requires external 22kHz source; 16-pin TQFN | Limited to one LNB; lacks DiSEqC burst capability; needs external components for tone injection | Choose MAX2105ETJ+ only for cost-sensitive single-tuner designs where DiSEqC is not required. |
Compared with ISL6405EEBZ, ISL6405ERZ offers superior thermal performance and hardware voltage select but demands layout change, while MAX2105ETJ+ reduces integration level and excludes DiSEqC functionality - making ISL6405EEBZ the only drop-in solution for dual-LNB, DiSEqC-compliant STBs using EPSOIC footprint.
Availability
ISL6405EEBZ is available at Aetrix Electronics and suitable for satellite set-top box manufacturing, DiSEqC switch integration, and dual-tuner PVR development requiring stable component supply and long-term industrial availability.
Supply support for ISL6405EEBZ 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 Corporation (now part of Renesas Electronics) is a U.S.-based analog and power management IC designer known for high-reliability satellite, industrial, and communications solutions.
The ISL6405 product line was engineered specifically for advanced satellite receiver power systems, integrating LNB bias, DiSEqC tone generation, and digital control into a single IC to replace multi-component discrete designs.
FAQ
What is the maximum continuous output current per channel of the ISL6405EEBZ?
The ISL6405EEBZ delivers up to 750mA of continuous output current per channel (VO1 and VO2). This rating is guaranteed across the full operating temperature range (–20°C to +85°C) and supports LNB loads including high-capacitance coaxial cables. Dynamic overcurrent protection can be configured for either 425mA or 775mA thresholds via the ISEL bit in the system register.
Does the ISL6405EEBZ support DiSEqC 1.x protocol compliance?
Yes, the ISL6405EEBZ supports DiSEqC 1.x protocols through its factory-trimmed 22kHz tone generator and fast-response DSQIN1/DSQIN2 inputs. With tone rise/fall times under 14µs and configurable burst timing via I²C, it meets EUTELSAT DiSEqC timing requirements for reliable switch command transmission without external components.
How does the line length compensation (LLC) feature work in the ISL6405EEBZ?
The LLC feature in the ISL6405EEBZ adds +1V to the selected nominal output voltage (13V or 18V) when the corresponding LLC bit is set high via I²C. For example, VSEL1=H + LLC1=H yields 19.0V (typ.) at VO1. This compensates for coaxial cable voltage drop without altering feedback resistors or requiring analog calibration.
Can the ISL6405EEBZ operate with both 3.3V and 5V I²C logic levels?
Yes, the ISL6405EEBZ supports full 3.3V and 5V I²C logic operation up to 400kHz fast-mode speed. Input logic thresholds scale with VDD (VIH ≥ 0.7×VDD, VIL ≤ 0.3×VDD), and the SCL/SDA pins use open-drain outputs compatible with standard pull-up configurations on either voltage rail.
What thermal protection mechanisms are implemented in the ISL6405EEBZ?
The ISL6405EEBZ includes junction-temperature-based thermal shutdown at 150°C (typ.), with automatic recovery at ~135°C (20°C hysteresis). When triggered, the OTF flag is set high in System Register 2 (SR2), and both PWM and linear regulators disable. This protects against sustained overload or poor heatsinking in EPSOIC-28 layouts.
ISL6405EEBZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 28-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Applications:
- Converter, Satellite Set-Top Box Designs
- Voltage - Input:
- 8V ~ 14V
- Number of Outputs:
- 2
- Voltage - Output:
- 13V ~ 18V
- Operating Temperature:
- -20°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-SOIC
ISL6405EEBZ FAQ
1.How can I place an order for ISL6405EEBZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6405EEBZ 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 ISL6405EEBZ reliable?
The price and inventory of ISL6405EEBZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6405EEBZ is usually 5 days.
3.What payment methods are accepted for ISL6405EEBZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6405EEBZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6405EEBZ?
ISL6405EEBZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6405EEBZ 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 ISL6405EEBZ?
For technical support, including ISL6405EEBZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6405EEBZ requirements.
6.How does Aetrix verify that ISL6405EEBZ is sourced from the original manufacturer or authorized distributors?
All ISL6405EEBZ 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 ISL6405EEBZ meets industry standards.
7.What is the process for return or replacement of ISL6405EEBZ?
All ISL6405EEBZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL6405EEBZ, 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 ISL6405EEBZ part is unused and in its original packaging.
Return procedure for ISL6405EEBZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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