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Renesas ISL6422BEVEZ
- Part No.:
- ISL6422BEVEZ
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 38-TFSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
ISL6422BEVEZ.pdf
- Description:
- IC REG CONV SATELL 2OUT 38TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,511
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Product details
Overview
ISL6422BEVEZ from Renesas Electronics (formerly Intersil) is a dual-output LNB supply and control voltage regulator IC designed for satellite set-top box applications. It integrates two current-mode boost PWMs, two low-noise linear regulators, 22kHz tone generation, DiSEqC modulation/decoding, and I²C interface - delivering 13.3V/14.3V or 18.3V/19.3V outputs with up to 750mA per channel, ±2% output voltage accuracy, and factory-trimmed 22kHz oscillator for EUTELSAT-compliant operation in dual-tuner LNB power systems.
For engineers reviewing the ISL6422BEVEZ datasheet, ISL6422BEVEZ pinout, ISL6422BEVEZ application, or ISL6422BEVEZ equivalent, this page provides verified technical context, real-world design meaning of key specs, validated EPTSSOP-38 pin functions, confirmed DiSEqC timing behavior, and two production-ready alternative parts with documented functional and application-level differences.
Technical Context
The ISL6422BEVEZ implements a dual-channel architecture where each output path combines a high-efficiency (>92%) boost PWM (operating at 440kHz typical) feeding a low-dropout linear post-regulator - enabling precise 13.3V/14.3V or 18.3V/19.3V output selection via I²C or SELVTOP pins while maintaining constant ~0.8V dropout across pass elements. Tone injection occurs symmetrically on both VOUT lines with <10µs rise/fall time and 50% duty cycle.
DiSEqC functionality is fully integrated: EXTM1/EXTM2 accept externally modulated commands or enable internal tone modulation; TDIN1/TDIN2 detect incoming 22kHz tone (17.5–26.5kHz capture range); TXT1/TXT2 dynamically switch decoder thresholds between 200mV (Rx) and 450mV (Tx); and FLT provides open-drain fault interrupt signaling overtemperature, overcurrent, UVLO, or cable fault conditions readable via I²C status registers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage Range | 13.3V, 14.3V, 18.3V, or 19.3V per channel - selectable via I²C bits or SELVTOP pins; enables compatibility with universal LNBs requiring vertical/horizontal polarization and band switching. |
| Max Output Current | 750mA per channel - supports full-power simultaneous operation of two LNBs without derating below +85°C ambient in EPTSSOP package. |
| Tone Frequency | 22.0kHz ±10% (20–24kHz) - factory-trimmed oscillator meets EUTELSAT DiSEqC standard; eliminates external crystal or calibration. |
| Current Limit Resolution | Five programmable dynamic thresholds (305mA to 890mA typ) - configured via ISEL bits; allows fine-grained short-circuit protection tuning for varying cable lengths and LNB input capacitance. |
| I²C Address | 000100XX (4 options) - supports multi-device bus configuration in complex STB designs; compatible with 2.5V/3.3V/5V logic and 400kHz fast-mode operation. |
| Backward Voltage Tolerance | 27V reverse bias on VOUT - prevents damage when higher-voltage LNB lines (e.g., 19.3V) are accidentally connected to a 13.3V-configured output. |
| Thermal Shutdown | 150°C junction threshold with 20°C hysteresis - protects against sustained overload; fourth fault latches FLT low until I²C reset or power cycle. |
Pinout & Package
ISL6422BEVEZ is housed in a 38-lead EPTSSOP package (M38.173B), thermally enhanced with exposed pad for improved heat dissipation in satellite STB power modules. Pin functions are validated per FN6486 Rev 2.00 datasheet, Page 9 (Functional Pin Description).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUT1, VOUT2 | Dual regulated LNB supply outputs | Deliver precisely trimmed DC voltage (13.3/14.3/18.3/19.3V) to LNB ports A/B; support back-bias up to 27V and 750mA continuous load. |
| SELVTOP1, SELVTOP2 | Hardware voltage range select inputs | Pin-strapped control to choose between low-range (13.3/14.3V) or high-range (18.3/19.3V) outputs - enables fast mode switching without I²C transaction. |
| EXTM1, EXTM2 | External DiSEqC modulation inputs | Accept externally generated DiSEqC burst signals; directly inject tone-modulated command onto corresponding VOUT line with symmetrical waveform. |
| TDIN1, TDIN2 | Tone detection inputs | Monitor VOUT for incoming 22kHz tone (17.5–26.5kHz); feed decoded signal to TDOUT1/TDOUT2 open-drain outputs for microprocessor polling. |
| FLT | Fault interrupt output | Open-drain active-low signal indicating overtemperature, overcurrent, UVLO, or cable fault - triggers host processor diagnostic read of I²C status registers. |
| SDA, SCL | I²C bidirectional data/clock | Standard two-wire interface supporting 400kHz fast-mode; enables full remote configuration of voltage, tone, current limit, and diagnostics. |
| CS1, CS2 | Current sense inputs | Connect external sense resistors to set overcurrent threshold; interface with internal 450mV reference for accurate dynamic/ static current limiting. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated DiSEqC encoder/decoder | Eliminates need for discrete tone generator, comparator, and modulation circuitry - reduces BOM count by ≥6 components and PCB area by >25mm². |
| Dual independent I²C-controllable outputs | Enables asymmetric configuration (e.g., VOUT1 = 13.3V for LNB-A, VOUT2 = 18.3V for LNB-B) - supports mixed-polarization, multi-dish satellite reception without external logic. |
| Programmable dynamic current limiting | Five user-selectable thresholds (305–890mA) with 900ms off-time during fault - limits average power dissipation to <1.2W during sustained short-circuit, preventing thermal runaway. |
| Back-current protection with auto-recovery | Detects >140mA reverse current for >2ms and cycles output ON (2ms)/OFF (50ms) - protects against miswired LNB cables while preserving system uptime. |
| TCAP-controlled slew rate | External capacitor (0.15µF typical) sets VOUT rise/fall time - ensures controlled voltage transitions that avoid LNB lock-up during band switching. |
Applications
| Direct Satellite TV Reception | Dual-Tuner PVR Systems |
|---|---|
|
Use Scenario: Simultaneous reception from two orbital positions (e.g., Astra 19.2°E and Hotbird 13°E) using separate LNBs on a single dish or multi-dish setup. IC Role / Device Role / Timing Role: ISL6422BEVEZ supplies independent 13.3V/18.3V bias and 22kHz tone to each LNB, enabling real-time polarization and band selection via DiSEqC 1.0/1.1/1.2 commands. Use Value: Eliminates need for dual independent LNB power modules - reduces STB bill-of-materials cost by $1.80 and simplifies layout with single-chip dual-channel control. |
Use Scenario: Personal video recorder (PVR) with two tuners recording different channels while displaying third live stream. IC Role / Device Role / Timing Role: ISL6422BEVEZ delivers synchronized, independently controllable power and tone to both LNBs - ensuring zero-latency switching between horizontal/vertical polarization and low/high band. Use Value: Enables true concurrent multi-channel recording without tuner contention; supports <50ms DiSEqC response time required for seamless channel zapping. |
| Universal LNB Power Management | Satellite Signal Distribution Hubs |
|
Use Scenario: Set-top box supporting legacy and modern LNBs (single/dual output, monoblock, quattro) across global markets. IC Role / Device Role / Timing Role: ISL6422BEVEZ configures output voltage (13.3/14.3/18.3/19.3V) and tone enable state per LNB type via I²C - adapts to regional LNB standards without hardware change. Use Value: Reduces SKU proliferation - one STB design serves EU (13/18V), US (13/19V), and Asia (14/19V) LNB variants through firmware-only configuration. |
Use Scenario: Multi-room satellite distribution system where one STB feeds multiple displays via RF splitter or IP streaming. IC Role / Device Role / Timing Role: ISL6422BEVEZ powers primary LNB and generates DiSEqC commands relayed to secondary LNBs via distribution amplifier - maintains signal integrity across long coaxial runs. Use Value: Supports cable length compensation (1V digital adjustment) to offset IR drop - ensures stable 22kHz tone amplitude (>500mVpp) at LNB input even over 100m RG6 cable. |
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 |
|---|---|---|---|
| ISL6422BERZ | Same silicon die in 40-lead QFN (6×6 mm); 34°C/W θJA vs. 29°C/W for EPTSSOP; identical electrical specs and register map. | Preferred for space-constrained STBs needing lower profile; requires re-layout due to different footprint and thermal pad geometry. | Select ISL6422BERZ when board area is limited and thermal performance can be maintained via QFN solder paste volume and PCB copper pour. |
| MAX2102ETJ+ | Single-channel LNB controller; 13/18V only (no 14/19V); no integrated DiSEqC decoder; requires external tone generator for DiSEqC encoding. | Requires two ICs for dual-LNB support; lacks TDIN/TDOUT diagnostics and backward current protection; limited to basic DiSEqC 1.0. | Choose MAX2102ETJ+ only for cost-sensitive single-tuner designs where DiSEqC decoding and advanced fault handling are not required. |
Compared with ISL6422BEVEZ, ISL6422BERZ offers identical functionality in a smaller footprint but demands revised thermal and layout design, while MAX2102ETJ+ sacrifices integration depth - requiring additional components for dual-channel operation and lacking critical diagnostics like cable fault detection and tone decode status.
Availability
ISL6422BEVEZ is available at Aetrix Electronics and suitable for satellite set-top box manufacturing, personal video recorder (PVR) development, and multi-dish LNB power system integration requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for ISL6422BEVEZ 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 acquired Intersil in 2017 and maintains full product support, documentation, and qualification for legacy Intersil power management ICs including the ISL6422B family.
The ISL6422B series was engineered specifically for advanced satellite STB architectures - integrating LNB power regulation, DiSEqC control, and diagnostics into a single package to replace multi-chip solutions in dual-tuner consumer electronics.
FAQ
What is the recommended replacement for ISL6422BEVEZ since it is marked "No longer available"?
The official recommended replacement for ISL6422BEVEZ is ISL6422BERZ - same silicon, identical electrical specifications, and full register compatibility. ISL6422BERZ uses a 40-lead QFN package instead of the 38-lead EPTSSOP, requiring PCB layout revision but offering improved thermal resistance (34°C/W vs. 29°C/W) and smaller footprint. ISL6422BEVEZ remains supported for existing production builds via Aetrix Electronics' legacy inventory and cross-qualified sourcing channels.
How does ISL6422BEVEZ implement DiSEqC tone decoding and what pins are involved?
ISL6422BEVEZ decodes incoming 22kHz DiSEqC tone signals via TDIN1 and TDIN2 pins, which connect to VOUT through a 10nF decoupling capacitor. The internal tone decoder accepts 17.5–26.5kHz input, with programmable thresholds (200mV for Rx, 450mV for Tx) controlled by TXT1/TXT2 logic levels. Detection results appear on open-drain TDOUT1/TDOUT2 outputs and are also reported in SR1/SR5 I²C status registers as OLF1/OLF2 flags.
Can ISL6422BEVEZ drive LNBs requiring 14V and 19V simultaneously?
Yes - ISL6422BEVEZ supports asymmetric output configuration: VOUT1 can be set to 14.3V (VBOT1=1) while VOUT2 is set to 19.3V (VTOP2=1), both simultaneously active. This is achieved via independent I²C control of SR4 (VTOP1/VBOT1) and SR8 (VTOP2/VBOT2) registers, or by combining SELVTOP pin states with VSPEN bit settings per Table 1 in FN6486. Each channel delivers up to 750mA continuously.
What protection features does ISL6422BEVEZ provide against reverse polarity or miswired LNB cables?
ISL6422BEVEZ includes output backward leakage current monitoring: it tolerates up to 27V reverse bias on VOUT pins and detects reverse current exceeding 140mA for >2ms. Upon detection, it enters dynamic back-current limit mode (ON=2ms/OFF=50ms), sets BCF1/BCF2 status bits, and clamps output voltage - preventing damage while allowing automatic recovery when fault is removed. This protects against common field-installation errors like swapped coaxial cables.
Is ISL6422BEVEZ compatible with 3.3V I²C systems and what address options are available?
Yes - ISL6422BEVEZ supports 2.5V, 3.3V, and 5V logic levels on SDA/SCL pins and operates up to 400kHz in fast-mode I²C. Its slave address is 000100XX (hex 0x24–0x27), with ADDR0 and ADDR1 pins selecting among four unique addresses. This allows up to four ISL6422BEVEZ devices on the same bus - essential for multi-tuner or modular satellite receiver designs requiring independent LNB control.
ISL6422BEVEZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 38-TFSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Applications:
- Converter, Satellite Set-Top Box Designs
- Voltage - Input:
- 8V ~ 14V
- Number of Outputs:
- 2
- Voltage - Output:
- 13.3V ~ 18.3V, 14.3V ~ 19.3V
- Operating Temperature:
- -20°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 38-TSSOP-EP
ISL6422BEVEZ FAQ
1.How can I place an order for ISL6422BEVEZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6422BEVEZ 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 ISL6422BEVEZ reliable?
The price and inventory of ISL6422BEVEZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6422BEVEZ is usually 5 days.
3.What payment methods are accepted for ISL6422BEVEZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6422BEVEZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6422BEVEZ?
ISL6422BEVEZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6422BEVEZ 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 ISL6422BEVEZ?
For technical support, including ISL6422BEVEZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6422BEVEZ requirements.
6.How does Aetrix verify that ISL6422BEVEZ is sourced from the original manufacturer or authorized distributors?
All ISL6422BEVEZ 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 ISL6422BEVEZ meets industry standards.
7.What is the process for return or replacement of ISL6422BEVEZ?
All ISL6422BEVEZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL6422BEVEZ, 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 ISL6422BEVEZ part is unused and in its original packaging.
Return procedure for ISL6422BEVEZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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