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Renesas ISL78206AVEZ
- Part No.:
- ISL78206AVEZ
- Manufacturer:
- Renesas
- Package:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
ISL78206AVEZ.pdf
- Description:
- IC REG BUCK ADJ 2.5A 20HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,371
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Product details
Overview
ISL78206AVEZ from Renesas (formerly Intersil) is an AEC-Q100 qualified 40V synchronous buck controller with integrated high-side MOSFET, supporting 3V–40V input, 2.5A output, ±1% voltage regulation accuracy, and programmable 200kHz–2.2MHz switching frequency. It delivers robust cycle-by-cycle overcurrent protection and operates in automotive cold-crank and start-stop systems.
For engineers reviewing the ISL78206AVEZ datasheet, ISL78206AVEZ pinout, ISL78206AVEZ application, or ISL78206AVEZ equivalent, this page provides verified technical context, validated pin functions, confirmed automotive-grade protections, and real-world thermal and efficiency data under 5V/2.5A synchronous buck operation at 500kHz.
Technical Context
The ISL78206AVEZ implements peak current mode control with slope compensation for fast transient response and inherent cycle-by-cycle current limiting. Its integrated high-side N-channel MOSFET (rDS(ON) = 140 mΩ typ.) and dedicated LGATE driver support both synchronous and non-synchronous topologies.
It features a programmable oscillator (200kHz–2.2MHz), frequency synchronization via bidirectional SYNC pin, hiccup-mode overcurrent protection triggered at 115% of the programmed limit, and comprehensive fault coverage including overvoltage (110%/120%), undervoltage (90%), and overtemperature (160°C trip) detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3V to 40V - supports automotive battery transients including cold-crank down to 3.05V and ISO 7637-2 pulse 4. |
| Output Current | 2.5A continuous - validated at +85°C ambient, 5V output, 500kHz, 8–30V input per thermal curves (Fig. 11). |
| Voltage Regulation Accuracy | ±1% - tight tolerance enables stable supply for embedded processors and I/O rails without post-regulation. |
| Switching Frequency | 200kHz to 2.2MHz - programmable via FS pin resistor; default 500kHz with FS tied to VCC/GND/floating. |
| Overcurrent Protection | Programmable cycle-by-cycle limit (default 3.6A) + hiccup mode at 115% - prevents thermal runaway during sustained shorts. |
| Operating Temperature | −40°C to +105°C - AEC-Q100 Grade 2 qualification ensures reliability in engine bay and cabin electronics. |
| Package | 20 Ld HTSSOP with exposed thermal pad - θJA = 32°C/W, θJC = 3.5°C/W; requires ≥20 vias to ground plane for thermal performance. |
Pinout & Package
ISL78206AVEZ is housed in a 20-lead HTSSOP package (M20.173A) with exposed thermal pad (PAD, Pin 21) that must be soldered to PCB ground plane. The package supports pin-to-pin compatibility with ISL78201 for layout reuse in boost-buck designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGND (1) | Power ground return | Carries high-current return path for high-side MOSFET and gate drivers; must connect directly to power ground plane. |
| BOOT (2) | High-side gate driver bias | Supplies floating voltage to drive internal N-MOSFET gate; requires 1µF ceramic capacitor to PHASE. |
| VIN (3,4) | Main input supply | Connects to battery rail; supplies integrated high-side MOSFET drain and internal LDO input; rated 40V max operating. |
| SGND (5) | Analog signal ground | Reference for FB, COMP, SS, ILIMIT; separate from PGND to minimize noise coupling into feedback loop. |
| VCC (6) | Internal LDO output | 4.5V ±0.3V regulated supply for control circuitry; requires ≥4.7µF ceramic decoupling to SGND. |
| EN (8) | Enable control | Active-high logic input (1.7V threshold); floating = enabled; pulled low = shutdown (<4.5µA quiescent). |
| FS (9) | Frequency set | Resistor-to-GND sets switching frequency (200kHz–2.2MHz); open/VCC/GND = 500kHz default. |
| SS (10) | Soft-start ramp | Charged by internal 5µA current source; external capacitor sets startup time; also used for tracking. |
| FB (11) | Voltage feedback input | Inverting input of error amplifier; referenced to 0.8V internal bandgap; sets output voltage via resistor divider. |
| COMP (12) | Error amplifier output | Compensation node for voltage loop; connects RC network between COMP and FB for stability. |
| ILIMIT (13) | Current limit programming | Resistor-to-GND programs peak current threshold (3.6A default); range: 40kΩ–330kΩ for 2.5A–5.5A. |
| DGND (14) | Digital ground | Return for PGOOD, SYNC, EN; connected to SGND at quiet ground plane to avoid digital noise injection. |
| PGOOD (15) | Power-good indicator | Open-drain output with 128-cycle delay; pulled low on OV/UV fault or EN deactivation; requires external pull-up to VCC. |
| PHASE (16,17) | Switch node | Connects to inductor; tied to source of internal high-side MOSFET; carries high dv/dt switching waveform. |
| SYNC (19) | Frequency sync I/O | Bidirectional: outputs local clock or accepts external sync signal (10% higher freq., >150ns pulse width). |
| LGATE (20) | Low-side gate driver | Drives external N-MOSFET in synchronous mode; must tie to GND via ≤5.1kΩ to suppress noise turn-on. |
| NC (7,18) | No connection | 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 area with ≥20 thermal vias for θJA optimization. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high-side MOSFET | rDS(ON) = 140 mΩ (typ.) at +25°C - eliminates external high-side switch and reduces BOM count in compact automotive supplies. |
| Programmable overcurrent limit | Adjustable 2.5A–5.5A via ILIMIT pin resistor - enables precise current tailoring for diverse load profiles without redesign. |
| Hiccup-mode short-circuit protection | Triggers at 115% of programmed limit with 5× extended soft-start recovery - sustains operation during intermittent faults while limiting average power dissipation. |
| Synchronous & non-synchronous operation | Single IC supports both topologies - LGATE driver configurable for external MOSFET or disabled for diode-based designs. |
| AEC-Q100 Grade 2 qualification | Validated for −40°C to +105°C ambient - meets automotive reliability requirements for body control, ADAS, and infotainment subsystems. |
Applications
| Automotive Engine Control Unit (ECU) Power | ADAS Camera Module Supply |
|---|---|
|
Use Scenario: Powers microcontroller, CAN transceiver, and sensor interface in under-hood ECU exposed to cold-crank (4.5V) and load-dump (40V) events. IC Role / Device Role / Timing Role: Primary buck controller regulating 5V/2.5A rail; manages dynamic load steps up to 2A with <100mV undershoot per Fig. 17. Use Value: Integrated high-side MOSFET and 3V–40V range eliminate need for pre-regulator, reducing board space and component count by 30% vs discrete solutions. |
Use Scenario: Supplies image sensor and ISP in rear-view camera module requiring low-noise 3.3V/1.5A output with fast transient response. IC Role / Device Role / Timing Role: Synchronous buck controller operating at 2.2MHz to shrink output filter size; uses PGOOD for system-level power sequencing. Use Value: ±1% regulation and 500kHz–2.2MHz programmability enable stable imaging power across temperature and input variation without post-LDO. |
| Start-Stop System DC-DC Converter | Industrial Telematics Gateway |
|
Use Scenario: Maintains 5V supply to infotainment head unit during engine restart where battery dips to 6V for 100ms. IC Role / Device Role / Timing Role: Buck controller with ultra-low 4.5µA shutdown current and 3.05V startup voltage - sustains regulation through deep brown-out. Use Value: Cycle-by-cycle current limiting and hiccup mode prevent thermal failure during repeated cranking cycles, extending product lifetime. |
Use Scenario: Powers LTE modem, GPS receiver, and microcontroller in fleet management gateway deployed in varying ambient conditions. IC Role / Device Role / Timing Role: Main 12V-to-5V converter with SYNC pin enabling phase-shifted parallel operation for 5A total output. Use Value: 20 Ld HTSSOP package with thermal pad achieves <85°C junction rise at +70°C ambient - avoids forced cooling in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL78201AVEZ | Pin-to-pin compatible boost-buck controller; adds boost capability via integrated low-side switch; same 20 Ld HTSSOP package. | Required when input can fall below output (e.g., 5V rail from 3.3V battery); not suitable for pure buck-only designs due to added complexity. | Select ISL78201AVEZ only if boost functionality is needed; otherwise ISL78206AVEZ offers lower cost and simpler layout for buck-only use cases. |
| MPQ4313-AEC1 | Monolithic 3.5A buck converter (not controller); integrates both high- and low-side MOSFETs; 3.8V–36V input; no external LGATE or PHASE pins. | Used where full integration is preferred over flexibility; lacks programmable OC limit and SYNC capability; limited to 36V max input. | Choose MPQ4313-AEC1 for space-constrained designs needing plug-and-play operation; retain ISL78206AVEZ when design requires topology flexibility or >36V input support. |
Compared with ISL78201AVEZ, ISL78206AVEZ provides optimized buck efficiency and simpler gate drive but lacks boost capability; versus MPQ4313-AEC1, it offers higher input voltage rating, programmable protection, and topology adaptability at the cost of external component count.
Availability
ISL78206AVEZ is available at Aetrix Electronics and suitable for automotive ECU power, ADAS camera modules, and start-stop system DC-DC converters requiring stable component supply with AEC-Q100 compliance and long-term production support.
Supply support for ISL78206AVEZ 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 its automotive analog portfolio. Renesas is a global semiconductor leader focused on embedded solutions for automotive, industrial, and IoT markets.
The ISL78206AVEZ belongs to Renesas' ISL78xxx automotive power management family, designed specifically for harsh-environment vehicle subsystems requiring wide-input, high-reliability DC-DC conversion without external high-side switches.
FAQ
What is the minimum input voltage required for ISL78206AVEZ to start up?
The ISL78206AVEZ requires a minimum VIN of 3.05V to initiate startup, determined by the rising Power-On Reset threshold of the internal VCC LDO. This allows reliable operation during automotive cold-crank events where battery voltage drops to ~3.2V. Once running, the device sustains regulation down to ~2.87V under load before shutdown, as confirmed by POR and dropout specifications in the datasheet.
Can ISL78206AVEZ operate in non-synchronous buck mode, and how is LGATE configured?
Yes, ISL78206AVEZ supports non-synchronous operation using an external Schottky diode. To disable the LGATE driver, connect LGATE to VCC through a resistor less than 5kΩ before VCC reaches its POR threshold. This prevents unintended turn-on of the low-side path and ensures proper diode conduction during the off-time, as detailed in Figure 5 and the Functional Description section.
How is the switching frequency programmed on ISL78206AVEZ?
The switching frequency of ISL78206AVEZ is set by a resistor (RFS) from the FS pin to GND, with values ranging from 51.1kΩ (2.2MHz) to 665kΩ (200kHz). If FS is tied to VCC, GND, or left floating, the device defaults to 500kHz. Equation 2 in the datasheet provides the exact RFS calculation, and Figure 20 gives the validated resistance vs. frequency curve.
What thermal design practices are required for ISL78206AVEZ to deliver 2.5A continuously?
To sustain 2.5A output at +85°C ambient, ISL78206AVEZ requires the exposed thermal pad (Pin 21) to be soldered to a large PCB ground plane using ≥20 thermal vias. Layout must separate SGND and PGND planes, minimize high-current loop area, and place input/output capacitors close to VIN/PHASE/PGND pins. Per Figure 11, this achieves <85°C die rise under typical 5V/2.5A conditions.
Does ISL78206AVEZ support pre-biased output startup?
Yes, ISL78206AVEZ supports pre-biased output startup, as verified in Figure 13 of the datasheet. During startup, the controller monitors the FB pin and initiates soft-start only after detecting valid feedback, preventing reverse current flow into a pre-charged output capacitor. This capability is essential for hot-swap and power-sequencing applications in automotive domains.
ISL78206AVEZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tube
- 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 FAQ
1.How can I place an order for ISL78206AVEZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL78206AVEZ 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 reliable?
The price and inventory of ISL78206AVEZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL78206AVEZ is usually 5 days.
3.What payment methods are accepted for ISL78206AVEZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL78206AVEZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL78206AVEZ?
ISL78206AVEZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL78206AVEZ 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?
For technical support, including ISL78206AVEZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL78206AVEZ requirements.
6.How does Aetrix verify that ISL78206AVEZ is sourced from the original manufacturer or authorized distributors?
All ISL78206AVEZ 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 meets industry standards.
7.What is the process for return or replacement of ISL78206AVEZ?
All ISL78206AVEZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL78206AVEZ, 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 part is unused and in its original packaging.
Return procedure for ISL78206AVEZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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