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Renesas ISL6609AIRZ
- Part No.:
- ISL6609AIRZ
- Manufacturer:
- Renesas
- Category:
- Gate Drivers
- Package:
- 8-VQFN Exposed Pad
- Datasheet:
-
ISL6609AIRZ.pdf
- Description:
- IC GATE DRVR HALF-BRIDGE 8QFN
- Quantity:
- Payment:
- Shipping:
Inventory:557
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Product details
Overview
ISL6609AIRZ from Intersil is a synchronous rectified MOSFET driver optimized for high-frequency buck converters driving two N-channel power MOSFETs. It operates from a single 5V ±10% supply, delivers <8ns rise/fall times into 3nF loads, integrates adaptive shoot-through protection, and features 0.4Ω lower gate drive sink resistance with 4A sink capability - enabling robust hold-down of the low-side MOSFET during high-dV/dt PHASE node transitions in microprocessor core voltage regulators.
For engineers reviewing the ISL6609AIRZ datasheet, ISL6609AIRZ pinout, ISL6609AIRZ application, or ISL6609AIRZ equivalent, this page provides verified technical context on its dual-gate drive architecture, QFN-8 thermal performance (θJC = 36°C/W), BOOT capacitor overcharge prevention (ISL6609A variant), three-state PWM input behavior, and design-critical timing parameters including 20ns ultra-low three-state hold-off time.
Technical Context
The ISL6609AIRZ implements adaptive shoot-through protection by monitoring LGATE and UGATE–PHASE voltages to dynamically control dead time, eliminating simultaneous conduction without fixed delay programming. Its upper gate driver uses internal bootstrap diode + external BOOT–PHASE capacitor, while the ISL6609A variant adds an integrated 3Ω BOOT resistor to limit overcharge during large negative PHASE swings.
It accepts a single PWM input that transitions through defined shutdown thresholds (1.70–2.00V rising, 3.10–3.41V falling) to disable both outputs and pull gates low - preventing negative output transients when controller operation is suspended. The EN pin enables/disables the entire driver, and the thermal pad in the QFN package must be connected to ground or left floating via vias to buried copper planes for optimal heat dissipation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Supply | 5V ±10% - minimizes switching losses in high-frequency, high-capacitance gate drive applications. |
| UGATE/LGATE Rise/Fall Time | <8ns / <4ns (3nF load) - enables >1MHz switching in multiphase VRDs for Intel/AMD CPUs. |
| Lower Gate Sink Resistance | 0.4Ω typical - ensures strong gate hold-down against Miller-induced self-turn-on at high dV/dt. |
| Three-State Hold-Off Time | 20ns - guarantees rapid, deterministic transition from three-state to active drive, critical for transient response. |
| BOOT Overcharge Protection | Integrated 3Ω resistor (ISL6609A only) - clamps excessive BOOT voltage during large negative PHASE excursions. |
| Thermal Resistance θJC | 36°C/W - enables high-power density layout with exposed thermal pad directly coupled to PCB ground plane. |
| Operating Temperature | −40°C to +100°C ambient - supports industrial and computing environments with extended thermal margins. |
Pinout & Package
ISL6609AIRZ is housed in an 8-lead 3×3 mm QFN package (JEDEC MO-220, pkg drawing L8.3x3), featuring an exposed thermal pad on the underside for enhanced thermal transfer. Pin numbering follows the top-view QFN layout with Pin 1 (UGATE) at top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| UGATE (Pin 1) | Upper gate drive output | Drives high-side N-MOSFET gate; no external gate resistor permitted to preserve shoot-through protection timing. |
| BOOT (Pin 2) | Floating bootstrap supply | Connects to BOOT capacitor (BOOT–PHASE); internal low-VF diode charges capacitor during low-side conduction. |
| PWM (Pin 3) | Three-state PWM control input | Accepts controller PWM signal; enters shutdown window (1.7–3.4V) to disable outputs and pull gates low. |
| GND (Pin 4) | Signal and power ground reference | Common return for all internal logic and gate drive paths; must be low-inductance connection. |
| LGATE (Pin 5) | Lower gate drive output | Drives low-side N-MOSFET gate; 4A sink capability prevents self-turn-on during PHASE node rising edge. |
| VCC (Pin 6) | +5V bias supply input | Single-supply operation; requires local ceramic bypass capacitor to GND for stable high-frequency drive. |
| EN (Pin 7) | Enable control input | Logic-high (>1.6V) enables driver; logic-low (<1.3V) disables all outputs and resets internal state. |
| PHASE (Pin 8) | Switching node return path | Connects to source of upper MOSFET; serves as return for upper gate drive current and bootstrap capacitor discharge path. |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive shoot-through protection | Dynamically adjusts dead time by monitoring LGATE and UGATE–PHASE voltages - eliminates fixed-delay tuning and prevents cross-conduction across MOSFET process variations. |
| Integrated BOOT diode + resistor | Low forward-voltage internal diode enables compact bootstrapping; 3Ω series resistor (ISL6609A only) limits peak BOOT current and prevents capacitor overvoltage during large negative PHASE swings. |
| Three-state PWM input | Recognizes high-impedance controller output states to force both gates low - eliminates need for external Schottky clamp diodes in VRD suspend modes. |
| Ultra-low 20ns hold-off time | Minimizes latency between PWM exit from shutdown window and gate reactivation - preserves tight regulation during load transients. |
| QFN-8 thermal pad | Exposed copper pad thermally coupled to PCB ground plane via multiple vias - achieves 36°C/W junction-to-case resistance for sustained 2–3A per phase operation. |
Applications
| Core Voltage Regulation for x86 Microprocessors | High-Frequency Multiphase DC/DC Converters |
|---|---|
|
Use Scenario: Power delivery to Intel Core i7 or AMD Ryzen CPU cores requiring dynamic VID scaling and sub-1V output at >100A. IC Role / Device Role / Timing Role: Synchronous gate driver in 3+ phase buck converter, paired with ISL63xx PWM controller to manage phase interleaving and current balancing. Use Value: 4A lower gate sink current prevents self-turn-on during 50V/ns PHASE node transitions, maintaining efficiency >90% at 1MHz switching frequency. |
Use Scenario: Compact, low-profile VRM on server motherboard where height and thermal density are constrained. IC Role / Device Role / Timing Role: Dual N-MOSFET driver per phase, leveraging QFN-8's near chip-scale footprint and 36°C/W θJC to sustain >2W dissipation without heatsink. Use Value: 8ns UGATE rise time enables clean 1.2MHz operation with minimal gate drive loss, reducing total solution size by 25% vs SOIC alternatives. |
| Synchronous Rectification in Isolated DC/DC | High-Current Point-of-Load (POL) Regulators |
|
Use Scenario: Secondary-side synchronous rectification in 48V–12V isolated telecom power supplies. IC Role / Device Role / Timing Role: Drives center-tapped or full-bridge synchronous rectifiers; three-state PWM input interfaces with isolated controller feedback loop. Use Value: Adaptive dead-time control compensates for MOSFET gate charge mismatch across temperature, improving light-load efficiency by 3–5%. |
Use Scenario: GPU or FPGA core supply delivering 50–150A at 0.8–1.2V in AI accelerator cards. IC Role / Device Role / Timing Role: High-current gate driver per phase in 4–6 phase POL module; EN pin synchronized with system power sequencing. Use Value: Bootstrap overcharge prevention avoids BOOT capacitor failure under high-current load dumps, extending field reliability beyond 10 years. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous MOSFET driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6609CRZ | Same ISL6609A functionality but rated for 0°C to +70°C ambient; identical QFN-8 package and pinout. | Restricted to commercial-temperature computing applications (e.g., desktop VRMs), not industrial or extended-temp servers. | Select ISL6609CRZ only if ambient operating range is guaranteed within 0–70°C and cost sensitivity outweighs thermal margin requirements. |
| ISL6609IRZ | ISL6609 (non-A) variant in same -40°C to +85°C QFN-8 package; lacks integrated 3Ω BOOT resistor and BOOT overcharge protection. | Suitable for lower-cost, lower-stress applications where PHASE node ringing is tightly controlled and negative swings are limited. | Choose ISL6609IRZ when layout parasitics are minimized and BOOT capacitor stress is verified below 27V DC; otherwise, ISL6609AIRZ provides superior robustness. |
Compared with ISL6609CRZ and ISL6609IRZ, the ISL6609AIRZ uniquely combines industrial temperature rating (-40°C to +85°C), QFN-8 thermal performance, and BOOT overcharge protection - making it the only option qualified for high-reliability, high-current server and AI accelerator VRMs where PHASE node transients exceed 20V/ns.
Availability
ISL6609AIRZ is available at Aetrix Electronics and suitable for core voltage regulation, high-frequency multiphase DC/DC conversion, and synchronous rectification applications requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for ISL6609AIRZ 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 semiconductor manufacturer specializing in power management, precision analog, and high-performance mixed-signal ICs for computing, industrial, and communications markets.
The ISL6609AIRZ belongs to Intersil's synchronous MOSFET driver product line, designed specifically for high-efficiency, high-frequency voltage regulator modules powering advanced microprocessors and GPUs.
FAQ
What is the key functional difference between ISL6609AIRZ and ISL6609IRZ?
The ISL6609AIRZ is the ISL6609A variant with industrial temperature range (−40°C to +85°C) and integrated 3Ω BOOT resistor for overcharge protection, whereas ISL6609IRZ is the base ISL6609 (non-A) version in the same QFN-8 package but without BOOT resistor or overcharge protection. Both share identical pinout and thermal specs, but ISL6609AIRZ adds robustness against large negative PHASE node excursions common in high-current server VRMs.
Does ISL6609AIRZ require an external bootstrap diode?
No, the ISL6609AIRZ includes an internal low forward-voltage bootstrap diode. Only an external ceramic capacitor between BOOT and PHASE pins is required to complete the bootstrap circuit. Adding an external diode is unnecessary and may interfere with the internal diode's operation or cause shoot-through timing errors.
What is the purpose of the three-state PWM input on ISL6609AIRZ?
The three-state PWM input on ISL6609AIRZ detects when the controller's PWM signal enters a high-impedance state (1.7–3.4V window), automatically disabling both gate drivers and pulling UGATE and LGATE low. This prevents negative output voltage transients during suspend modes and eliminates the need for external Schottky clamping diodes in microprocessor VRDs.
Can ISL6609AIRZ drive both high-side and low-side MOSFETs simultaneously?
No - the ISL6609AIRZ implements adaptive shoot-through protection that ensures strict non-overlap between high-side and low-side conduction. It monitors LGATE and UGATE–PHASE voltages to dynamically insert dead time, preventing simultaneous conduction even under varying MOSFET gate charge or temperature conditions. This is fundamental to its safe operation in synchronous buck topologies.
What thermal design considerations apply to the ISL6609AIRZ QFN package?
The ISL6609AIRZ QFN package requires the exposed thermal pad to be connected to PCB ground (or left floating) via ≥4 thermal vias to inner-layer copper planes. This achieves the specified θJC = 36°C/W. Without proper thermal land design, junction temperature can exceed 125°C at moderate load, triggering thermal shutdown or degrading reliability. Layout must minimize PHASE node loop inductance to reduce ringing-induced stress on the BOOT circuit.
ISL6609AIRZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-VQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Driven Configuration:
- Half-Bridge
- Channel Type:
- Synchronous
- Number of Drivers:
- 2
- Gate Type:
- N-Channel MOSFET
- Voltage - Supply:
- 4.5V ~ 5.5V
- Logic Voltage - VIL, VIH:
- 1V, 2V
- Current - Peak Output (Source, Sink):
- -, 4A
- Input Type:
- Non-Inverting
- High Side Voltage - Max (Bootstrap):
- 36 V
- Rise / Fall Time (Typ):
- 8ns, 8ns
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-QFN (3x3)
ISL6609AIRZ FAQ
1.How can I place an order for ISL6609AIRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6609AIRZ 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 ISL6609AIRZ reliable?
The price and inventory of ISL6609AIRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6609AIRZ is usually 5 days.
3.What payment methods are accepted for ISL6609AIRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6609AIRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6609AIRZ?
ISL6609AIRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6609AIRZ 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 ISL6609AIRZ?
For technical support, including ISL6609AIRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6609AIRZ requirements.
6.How does Aetrix verify that ISL6609AIRZ is sourced from the original manufacturer or authorized distributors?
All ISL6609AIRZ 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 ISL6609AIRZ meets industry standards.
7.What is the process for return or replacement of ISL6609AIRZ?
All ISL6609AIRZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL6609AIRZ, 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 ISL6609AIRZ part is unused and in its original packaging.
Return procedure for ISL6609AIRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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