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Renesas ISL78206AVEZ-T
- Part No.:
- ISL78206AVEZ-T
- Manufacturer:
- Renesas
- Package:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
ISL78206AVEZ-T.pdf
- Description:
- IC REG BUCK ADJ 2.5A 20HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,494
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Product details
Overview
ISL78206AVEZ-T from Renesas Electronics is an AEC-Q100 qualified 40V, 2.5A synchronous buck controller with integrated high-side MOSFET and low-side gate driver. It operates across 3V–40V input, delivers ±1% output voltage regulation at 0.8V reference, supports 200kHz–2.2MHz programmable switching frequency, and enables both synchronous and non-synchronous buck topologies for automotive power conversion.
For engineers reviewing the ISL78206AVEZ-T datasheet, ISL78206AVEZ-T pinout, ISL78206AVEZ-T application, or ISL78206AVEZ-T equivalent, this page provides verified technical context, validated pin functions, confirmed thermal and protection behavior, and real-world automotive design constraints including cold-crank operation, hiccup-mode short-circuit recovery, and PCB layout requirements for the 20 Ld HTSSOP package.
Technical Context
The ISL78206AVEZ-T implements peak current mode control with cycle-by-cycle current limiting, slope compensation, and frequency foldback under overcurrent. Its internal 0.8V reference and error amplifier drive COMP to regulate output via external resistor divider on FB, while soft-start uses a 5µA internal current source charging an external capacitor on SS.
It integrates a high-side N-channel MOSFET (rDS(ON) = 140 mΩ max at +25°C) and LGATE driver capable of sinking 100mA/2.8Ω and sourcing 100mA/3.5Ω. The device supports synchronization via bidirectional SYNC pin with automatic 180° phase shift between master/slave ICs and accepts external clock injection up to 1.6× local frequency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3V to 40V - supports automotive cold-crank (≥3V) and 24V/40V bus systems without external pre-regulation. |
| Output Current Capability | 2.5A continuous - validated at +85°C ambient, 5V output, 500kHz, 8–30V input, with proper thermal layout. |
| Switching Frequency | 200kHz to 2.2MHz - programmable via FS pin resistor; default 500kHz when FS tied to VCC/GND/floating. |
| Voltage Regulation Accuracy | ±1% - tight tolerance over -40°C to +105°C ensures stable I/O and processor supply rails. |
| Current Limit Threshold | Default 3.6A (IOC₁), programmable via ILIMIT pin - enables precise overcurrent setting for inductor and MOSFET sizing. |
| Thermal Protection | 160°C trip / 140°C recovery - hysteresis prevents oscillation during thermal stress; die temperature monitored internally. |
| Shutdown Current | ≤4.5 µA - ultra-low quiescent draw preserves battery life in always-on vehicle modules. |
Pinout & Package
ISL78206AVEZ-T is housed in a thermally enhanced 20-lead HTSSOP package (M20.173A) with exposed thermal pad (PAD, pin 21) requiring direct connection to PCB ground plane via ≥20 vias for optimal θJA = 32°C/W performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGND (1) | Power ground return | Carries high-current return path for high-side MOSFET and driver; must be low-inductance copper pour. |
| BOOT (2) | High-side gate bias supply | Drives internal N-MOSFET gate via integrated bootstrap circuit; requires 1µF ceramic cap to PHASE. |
| VIN (3,4) | Main input supply | Connects to drain of integrated high-side MOSFET and input to internal LDO; rated 40V max operating. |
| SGND (5) | Analog signal ground | Reference for FB, COMP, EN, SS; separate from PGND to avoid noise coupling into feedback loop. |
| VCC (6) | LDO output supply | 4.5V ±0.3V regulated output powering internal logic and drivers; requires ≥4.7µF ceramic decoupling. |
| EN (8) | Enable control input | Active-high logic: >1.7V enables, <1.0V disables; internal pull-up allows floating for default-on operation. |
| FS (9) | Frequency select | Resistor-to-GND sets fSW; open/VCC/GND forces 500kHz; supports synchronization via SYNC pin. |
| SS (10) | Soft-start timing | Charged by 5µA internal current; external capacitor sets ramp time; also used for hiccup-mode recovery. |
| FB (11) | Feedback input | Inverting input of error amp; senses output via resistor divider to 0.8V reference; monitors OV/UV faults. |
| COMP (12) | Error amplifier output | Compensated loop node; connects RC network to FB for stability; drives PWM comparator threshold. |
| ILIMIT (13) | Overcurrent threshold set | Resistor-to-GND programs IOC₁; open/VCC/GND defaults to 3.6A; enables precise current limit tuning. |
| DGND (14) | Digital ground | Return for PGOOD, SYNC, LGATE logic; connected to SGND at quiet ground plane to minimize noise. |
| PGOOD (15) | Power-good indicator | Open-drain output with 128-cycle delay; pulled low on OV/UV fault or EN deassertion; requires external pull-up. |
| PHASE (16,17) | Switch node | Connects to inductor; tied to source of internal high-side MOSFET; critical for EMI and layout integrity. |
| SYNC (19) | Synchronization interface | Bidirectional: outputs local clock or accepts external sync signal; enables multi-phase interleaving. |
| LGATE (20) | Low-side gate driver | Drives external N-MOSFET in synchronous mode; disabled in non-synchronous mode via VCC tie. |
| NC (7,18) | No connect | Internally unconnected; recommended to tie to SGND at quiet ground plane for mechanical stability. |
| PAD (21) | Thermal pad | Non-electrical exposed copper; must be soldered to large PCB ground plane with ≥20 thermal vias. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive use from -40°C to +105°C ambient, meeting stringent reliability and lifetime requirements. |
| Hiccup-mode overcurrent protection | Triggers at 115% of primary current limit (IOC₂); disables PWM for 5× soft-start duration to prevent thermal runaway. |
| Pre-biased output startup | Supports start-up into existing output voltage without reverse current flow-critical for hot-swap and rail sequencing. |
| Integrated high-side MOSFET | rDS(ON) = 140 mΩ max at +25°C reduces BOM count and improves efficiency vs discrete controller + FET solutions. |
| Programmable frequency synchronization | Enables multi-phase operation with automatic 180° phase shift or external clock lock for EMI reduction and current sharing. |
| Comprehensive fault monitoring | Monitors overvoltage (110%/120%), undervoltage (90%), overtemperature (160°C), and programmable overcurrent. |
Applications
| Automotive Infotainment Power Supply | ADAS Camera Module Regulator |
|---|---|
|
Use Scenario: Powers SoC, DDR memory, and display interfaces in head units with wide input transients (cold-crank, load dump). IC Role / Device Role / Timing Role: Primary buck controller delivering 1.1V/1.8V/3.3V rails with fast transient response and hiccup-mode short-circuit protection. Use Value: Maintains regulation down to 3V input during cranking; ±1% accuracy ensures stable processor operation; PGOOD enables safe system boot sequencing. |
Use Scenario: Supplies image sensor and ISP in forward-facing camera modules exposed to engine bay temperatures. IC Role / Device Role / Timing Role: High-efficiency synchronous buck regulator with thermal shutdown and pre-biased startup for reliable cold/warm starts. Use Value: Operates continuously at +105°C ambient; integrated MOSFET eliminates external FET thermal mismatch; SYNC enables multi-camera timing alignment. |
| Vehicle Telematics LTE Modem Power | Body Control Module (BCM) Sub-Regulator |
|
Use Scenario: Generates 5V/3.3V rails for LTE modem, GNSS receiver, and CAN transceiver in telematics control units. IC Role / Device Role / Timing Role: Dual-rail buck controller supporting both synchronous and non-synchronous modes for flexibility across sub-systems. Use Value: 40V rating handles load-dump spikes; low shutdown current (<4.5 µA) extends backup battery life; ILIMIT pin enables precise current limiting per rail. |
Use Scenario: Provides isolated 5V supply for microcontroller, LIN transceivers, and LED drivers in door modules and lighting nodes. IC Role / Device Role / Timing Role: Robust buck controller with built-in OVP/UVP/OTP and PGOOD signaling for fail-safe diagnostics. Use Value: AEC-Q100 qualification ensures long-term reliability; soft-start prevents inrush into capacitive loads; PGND/SGND separation minimizes noise coupling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL78201AVEZ-T | Pin-to-pin compatible boost-buck controller with wider VIN range (up to 60V) and ability to regulate output above or below input. | Required where input may drop below output (e.g., cold-crank with 5V rail) or exceed it (load dump), unlike ISL78206AVEZ-T's buck-only operation. | Select ISL78201AVEZ-T when bidirectional voltage conversion is needed; same PCB layout enables design reuse but requires different compensation. |
| MPQ4312-AEC1 | 40V, 2.5A synchronous buck controller with integrated high-side FET, but lacks hiccup-mode protection and has fixed 500kHz frequency. | Used in cost-sensitive automotive modules where robust short-circuit recovery is less critical than BOM simplicity. | Choose MPQ4312-AEC1 only if hiccup-mode OCP and programmable frequency are not required; no pin compatibility with ISL78206AVEZ-T. |
Compared with ISL78201AVEZ-T and MPQ4312-AEC1, the ISL78206AVEZ-T offers superior fault resilience via hiccup-mode OCP and flexible frequency programming, making it optimal for safety-critical 12V/24V automotive rails where short-circuit robustness and thermal management are paramount.
Availability
ISL78206AVEZ-T is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS camera modules, and telematics control units requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for ISL78206AVEZ-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 delivering trusted embedded solutions for automotive, industrial, and IoT markets, with deep expertise in power management and functional safety.
The ISL78206AVEZ-T belongs to Renesas' ISL78xxx automotive power controller family, designed specifically for demanding vehicle subsystems requiring high reliability, wide input range, and integrated protection features under extreme thermal and electrical conditions.
FAQ
What is the maximum continuous output current supported by the ISL78206AVEZ-T?
The ISL78206AVEZ-T delivers 2.5A continuous output current under typical automotive conditions: +85°C ambient, 5V output, 500kHz switching, and 8–30V input with proper thermal layout using the exposed pad and ≥20 vias. Derating is required above +85°C ambient or at higher input/output voltage combinations to maintain junction temperature ≤+125°C.
Does the ISL78206AVEZ-T support pre-biased output startup?
Yes, the ISL78206AVEZ-T supports pre-biased output startup, allowing it to begin regulation even when the output voltage is already present at power-on. This prevents reverse current flow and ensures safe operation in systems with multiple power domains or hot-swap requirements-confirmed in the Functional Description section of the FN8618 datasheet.
How does the hiccup-mode overcurrent protection work in the ISL78206AVEZ-T?
The ISL78206AVEZ-T enters hiccup mode when the high-side MOSFET current reaches 115% of the programmed IOC₁ threshold (e.g., 4.14A if IOC₁ = 3.6A). It disables PWM for five full soft-start cycles (each ~5× longer than normal), then attempts restart. This prevents thermal runaway during sustained shorts while enabling automatic recovery once the fault clears.
Can the ISL78206AVEZ-T operate in non-synchronous buck mode?
Yes, the ISL78206AVEZ-T supports non-synchronous buck operation by disabling the LGATE driver-achieved by connecting LGATE to VCC through a <5kΩ resistor before startup. In this mode, an external Schottky diode replaces the low-side MOSFET, and phase-node ringing is managed with an RC snubber (e.g., 200Ω + 2.2nF), as documented in Figure 18 and the Functional Description.
What is the purpose of the PAD pin (pin 21) on the ISL78206AVEZ-T?
The PAD pin (pin 21) is the exposed thermal pad on the underside of the 20 Ld HTSSOP package. It is electrically isolated but must be soldered to a large PCB ground copper plane using ≥20 thermal vias to achieve θJA = 32°C/W and maintain die temperature ≤+125°C under full load. Failure to properly connect the PAD risks thermal shutdown or reduced lifetime.
ISL78206AVEZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 38V
- Current - Output:
- 2.5A
- Frequency - Switching:
- 200kHz ~ 2.2MHz
- Synchronous Rectifier:
- Both
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-HTSSOP
ISL78206AVEZ-T FAQ
1.How can I place an order for ISL78206AVEZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL78206AVEZ-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 ISL78206AVEZ-T reliable?
The price and inventory of ISL78206AVEZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL78206AVEZ-T is usually 5 days.
3.What payment methods are accepted for ISL78206AVEZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL78206AVEZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL78206AVEZ-T?
ISL78206AVEZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL78206AVEZ-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 ISL78206AVEZ-T?
For technical support, including ISL78206AVEZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL78206AVEZ-T requirements.
6.How does Aetrix verify that ISL78206AVEZ-T is sourced from the original manufacturer or authorized distributors?
All ISL78206AVEZ-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 ISL78206AVEZ-T meets industry standards.
7.What is the process for return or replacement of ISL78206AVEZ-T?
All ISL78206AVEZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL78206AVEZ-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 ISL78206AVEZ-T part is unused and in its original packaging.
Return procedure for ISL78206AVEZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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