My Inquiry
My Account
Renesas ISL6405ER
- Part No.:
- ISL6405ER
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
ISL6405ER.pdf
- Description:
- IC REG CONV SATELLIT 2OUT 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,703
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ISL6405ER from Intersil is a dual-output LNB supply and control voltage regulator with I²C interface, designed for satellite set-top box modules powering two low-noise blocks (LNBs). It integrates two current-mode boost PWMs (≥92% efficiency), two low-noise linear regulators, 22kHz tone generation, DiSEqC encoding, and digital line-length compensation. Each output delivers 13V/18V ±3% at up to 750mA continuous current for simultaneous dual-tuner operation.
For engineers reviewing the ISL6405ER datasheet, ISL6405ER pinout, ISL6405ER application, or ISL6405ER equivalent, key selection considerations include I²C-configurable 13V/18V outputs with 1V cable compensation, independent 22kHz tone enable per channel via DSQIN pins or ENT bits, thermal/overcurrent diagnostics via OLF/OTF flags, and QFN-32 package compatibility with 5×5 mm footprint and exposed thermal pad.
Technical Context
The ISL6405ER implements two independent current-mode boost PWM controllers feeding low-dropout linear regulators-each configured via I²C register writes (SR1/SR2) to set VSEL (13V/18V) and LLC (±1V compensation). The internal 220kHz oscillator drives both PWMs and is factory-trimmed to generate precise 22kHz tone for DiSEqC compliance, modulated either by dedicated DSQIN pins or I²C ENT bits.
Overcurrent protection supports static (425mA/775mA clamp) or dynamic mode (900ms off-time, 20ms on-time cycling), while thermal shutdown activates at 150°C (typ.) with 15°C hysteresis. All functions-including EN1/EN2 standby control, diagnostic flag readback, and address selection via ADDR pin-are managed through an I²C interface compliant with 400kHz fast-mode operation and 3.3V/5V logic levels.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 13V or 18V (±3%) per channel, digitally selectable via I²C VSEL bits or SEL18V pins on QFN package |
| Cable Compensation | +1V offset per channel enabled via I²C LLC bit to counteract coaxial voltage drop |
| Continuous Output Current | 750mA per channel, supporting dual LNBs simultaneously without derating |
| Tone Frequency | 22kHz ±10%, factory-trimmed for DiSEqC (EUTELSAT) compliance; modulated via DSQIN or ENT bits |
| I²C Interface | Slave address 000100XX, 400kHz fast-mode compatible, full 3.3V/5V operation with ACK/NACK protocol |
| Thermal Protection | Shuts down at 150°C (typ.), resumes at 135°C (typ.), with OTF flag visible in SR2 |
| Package | 32-pin QFN (5×5 mm, JEDEC MO-220 VHHD-2), exposed thermal pad, Pb-free option (ISL6405ERZ) |
Pinout & Package
ISL6405ER uses a 32-lead QFN package (5×5 mm, JEDEC MO-220 VHHD-2) with exposed thermal pad for enhanced thermal performance. Pinout is validated per official Intersil datasheet FN9026.2 (Fig. 2, p.2).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Main power supply input | Accepts 8–14V input; powers internal circuitry and charge pump; triggers UVLO at 7.5V |
| VO1 / VO2 | Dual regulated LNB output terminals | Deliver final 13V/18V ±3% to antenna ports; support simultaneous dual-tuner operation |
| DSQIN1 / DSQIN2 | DiSEqC tone enable inputs | Direct 22kHz modulation control per LNB; active-HIGH, enables tone when ENT1/2 = LOW |
| TCAP1 / TCAP2 | Rise/fall time setting capacitors | External 1µF cap sets ~3.4ms output transition time; prevents PWM overcurrent during VSW charging |
| SEL18V1 / SEL18V2 | Hardware 13V/18V select pins | QFN-only feature; overrides I²C VSEL to force 18V output; must initialize I²C to 13V first |
| SCL / SDA | I²C bus interface | Open-drain bidirectional lines; support 400kHz fast-mode; require external pull-ups |
| ADDR | I²C slave address select | GND = 0001000, ≥2.7V = 0001001; enables dual-device addressing on same bus |
Key Features
| Feature | Design Value |
|---|---|
| Integrated dual LNB power solution | Eliminates need for discrete boost converters, linear regulators, and tone generators-reducing BOM count and PCB area |
| I²C-configurable output voltage & compensation | Enables remote software control of 13V/18V selection and +1V cable compensation per channel without hardware changes |
| Dedicated DiSEqC tone modulation path | DSQIN pins provide sub-microsecond tone activation for burst coding, meeting EUTELSAT timing requirements |
| Dual-mode overcurrent protection | Configurable static clamp (425/775mA) or dynamic cycling (900ms off/20ms on) to balance start-up reliability and short-circuit power dissipation |
| Real-time diagnostics via I²C | OLF1/OLF2 and OTF flags readable in SR1/SR2 allow firmware to detect overload or thermal fault without external sensors |
Applications
| Satellite Dual-Tuner STB | Multi-Dish LNB Control |
|---|---|
Use Scenario: Consumer satellite set-top box with two independent tuners receiving signals from a single dish using dual-LNB configuration. IC Role / Device Role / Timing Role: ISL6405ER supplies regulated 13V/18V power and injects 22kHz tone to select LNB band (vertical/horizontal) and polarization for each tuner. Use Value: Enables simultaneous recording and viewing of different channels without signal contention; eliminates need for external tone generators or voltage switches. | Use Scenario: Professional installation with two separate satellite dishes (e.g., Astra + Hotbird), each feeding one LNB input of the STB. IC Role / Device Role / Timing Role: ISL6405ER independently controls voltage (13V/18V) and 22kHz tone per LNB port to switch between dishes and bands. Use Value: Supports DiSEqC 1.0/1.1 protocols for multi-dish switching; allows full remote control of dish selection and polarization via single I²C bus. |
| Personal Video Recorder (PVR) | Commercial Headend Equipment |
Use Scenario: Integrated PVR with dual-tuner architecture recording one program while playing back another. IC Role / Device Role / Timing Role: ISL6405ER provides stable, low-noise 13V/18V outputs with <80mV load regulation to maintain LNB lock during rapid channel changes. Use Value: Ensures uninterrupted signal acquisition during playback/recording transitions; thermal protection prevents shutdown during extended recording sessions. | Use Scenario: Multi-channel satellite distribution system in hotels or apartment complexes requiring reliable LNB power across dozens of STBs. IC Role / Device Role / Timing Role: ISL6405ER's I²C diagnostics (OLF/OTF flags) feed into centralized monitoring systems to preemptively identify failing LNBs or cabling faults. Use Value: Reduces field service calls by enabling predictive maintenance; QFN package ensures high thermal reliability in densely packed headend racks. |
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 |
|---|---|---|---|
| MAX2105ETJ+ | Single-output LNB controller; no integrated 22kHz tone generator; requires external oscillator for DiSEqC | Limited to single-tuner designs; lacks dual-channel independence and cable compensation | Select only for cost-sensitive single-LNB applications where DiSEqC is handled externally |
| LM48000SQ/NOPB | Quad-output LNB IC with 13/18V selection but fixed 22kHz tone; no I²C interface-uses parallel control pins | Requires more GPIOs and PCB routing; no remote diagnostics or dynamic current limiting | Prefer for legacy designs with limited microcontroller resources but no need for I²C-based system integration |
Compared with MAX2105ETJ+ and LM48000SQ/NOPB, the ISL6405ER uniquely combines dual independent outputs, integrated DiSEqC-compliant 22kHz generation, I²C-configurable cable compensation, and real-time thermal/overload diagnostics-making it optimal for modern dual-tuner satellite receivers requiring compact, software-controllable power management.
Availability
ISL6405ER is available at Aetrix Electronics and suitable for satellite set-top box design, personal video recorder development, and commercial headend equipment requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for ISL6405ER 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 ISL6405ER belongs to Intersil's LNB power management product line, engineered specifically for advanced satellite receiver architectures demanding dual-channel precision voltage regulation, DiSEqC compliance, and embedded system-level control via I²C.
FAQ
What is the maximum continuous output current per channel of the ISL6405ER?
The ISL6405ER delivers up to 750mA of continuous current per output channel (VO1 and VO2), verified across the full operating temperature range of –20°C to +85°C. This rating assumes proper thermal management via the QFN package's exposed pad and meets specifications under worst-case load regulation conditions (≤200mV deviation from nominal 13V/18V).
How does the ISL6405ER implement DiSEqC-compatible 22kHz tone generation?
The ISL6405ER features a factory-trimmed 22kHz oscillator (20–24kHz tolerance) that drives DiSEqC encoding either via the DSQIN1/DSQIN2 pins (for direct hardware modulation) or through the ENT1/ENT2 bits in the I²C system registers. When ENT1/2 = LOW, the DSQIN pin controls tone injection; when ENT1/2 = HIGH, tone is continuous regardless of DSQIN state-ensuring full EUTELSAT protocol compliance.
Can the ISL6405ER operate with both 3.3V and 5V I²C logic levels?
Yes, the ISL6405ER's I²C interface supports full 3.3V and 5V logic operation up to 400kHz fast-mode speed. Input thresholds are defined as VIH ≥ 0.7×VDD and VIL ≤ 0.3×VDD, allowing seamless integration with mixed-voltage microcontrollers. Pull-up resistors must be connected externally to the appropriate VDD rail.
What thermal protection mechanism does the ISL6405ER use, and how is it reported?
The ISL6405ER shuts down its boost converters and linear regulators when junction temperature exceeds 150°C (typical), then resumes operation at 135°C (typical) with 15°C hysteresis. This condition is reported via the OTF (Over-Temperature Flag) bit in System Register 2 (SR2), which remains HIGH until cleared by firmware after temperature recovery.
Does the ISL6405ER support independent voltage selection for each output channel?
Yes, the ISL6405ER supports fully independent voltage selection per channel: VO1 is controlled by VSEL1 and LLC1 bits in SR1, while VO2 is controlled by VSEL2 and LLC2 bits in SR2. Each can be set to 13V/14V/18V/19V combinations via I²C, or overridden by the SEL18V1/SEL18V2 pins on the QFN package-enabling asymmetric configurations like 13V + 18V for mixed-LNB systems.
ISL6405ER Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 32-VFQFN Exposed Pad
- 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:
- 32-QFN (5x5)
ISL6405ER FAQ
1.How can I place an order for ISL6405ER through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6405ER 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 ISL6405ER reliable?
The price and inventory of ISL6405ER are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6405ER is usually 5 days.
3.What payment methods are accepted for ISL6405ER?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6405ER transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6405ER?
ISL6405ER orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6405ER 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 ISL6405ER?
For technical support, including ISL6405ER datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6405ER requirements.
6.How does Aetrix verify that ISL6405ER is sourced from the original manufacturer or authorized distributors?
All ISL6405ER 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 ISL6405ER meets industry standards.
7.What is the process for return or replacement of ISL6405ER?
All ISL6405ER units undergo pre-shipment inspection (PSI). If there is an issue with ISL6405ER, 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 ISL6405ER part is unused and in its original packaging.
Return procedure for ISL6405ER:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL6405ER 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…
