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Renesas ISL99135BDRZ-T
- Part No.:
- ISL99135BDRZ-T
- Manufacturer:
- Renesas
- Category:
- Full Half-Bridge (H Bridge) Drivers
- Package:
- 24-PowerTFQFN
- Datasheet:
-
ISL99135BDRZ-T.pdf
- Description:
- IC HALF BRIDGE DRIVER 35A 24QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,363
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Product details
Overview
ISL99135BDRZ-T from Renesas (formerly Intersil) is a 35A DrMOS power module integrating high-performance FET driver, high-side and low-side MOSFETs, and bootstrap diode in a single 3.5×5 mm QFN-24 package. It delivers up to 35A continuous output current with 0.5Ω high-side RDS(on), supports 5V three-state PWM input, enables diode emulation for light-load efficiency, and features ultra-low 3µA shutdown supply current for IMVP8 PS4 compliance - deployed in CPU core VRMs for server and high-end computing platforms.
For engineers reviewing the ISL99135BDRZ-T datasheet, ISL99135BDRZ-T pinout, ISL99135BDRZ-T application, or ISL99135BDRZ-T equivalent, key selection criteria include its 35A current rating, 5V PWM interface compatibility with ISL68201/ISL9585x controllers, diode emulation timing (350ns min LG on-time), adaptive shoot-through protection, and PS4 exit latency of 15µs - all critical for high-density, multi-phase buck regulator design.
Technical Context
The ISL99135BDRZ-T implements a synchronous buck power stage with integrated gate driver logic, adaptive shoot-through protection that monitors GH/SW and GL voltage transitions to prevent cross-conduction, and zero-current detection for diode emulation mode. Its three-state PWM input enables robust fault handling via controller-initiated tri-state hold-off (100–250ns), while internal 20kΩ high-side gate-to-source resistor prevents self-turn-on during high dv/dt input bus transients.
It operates across VIN = 0–25V and VCC = 5V ±5%, supports switching frequencies up to 2MHz, and integrates an internal Schottky bootstrap diode (VF = 0.43–0.65V @ 2mA). The device enters ultra-low-power shutdown (3µA) when FCCM is floating or biased within its 2.2–2.8V tri-state window - a feature specifically designed for Intel IMVP8 PS4 standby compliance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 0V to 25V - supports wide-input industrial and server DC/DC rails without external pre-regulation. |
| Continuous Current | 35A - rated output capability enabling single-phase core VRMs for high-performance CPUs and GPUs. |
| PWM Input Voltage | 5.0V logic compatible - interoperable with ISL68201, ISL9585x, ISL637x, and other Intersil/Renesas 5V PWM controllers. |
| Shutdown Supply Current | 3µA - meets IMVP8 PS4 low-power requirement, minimizing system standby power loss. |
| Switching Frequency | Up to 2MHz - enables compact magnetics and high-density PCB layout in POL applications. |
| Thermal Resistance θJA | 10°C/W - validated on high-efficiency thermal test board, supporting >30W dissipation in typical layouts. |
| Package | 24-lead 3.5×5 mm QFN with exposed thermal pad - optimized for thermal transfer and high-current routing. |
Pinout & Package
ISL99135BDRZ-T uses a 24-lead Exposed Pad QFN package (3.5×5 mm, RoHS-compliant, pkg drawing L24.3.5x5W), with thermal pad (PAD1/PAD2) connected to GND for enhanced heat dissipation. Pin 1 marked by dot; top-side pin numbering follows standard QFN convention.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PWM (Pin 1) | Three-state PWM input | Accepts 5V logic PWM signal; floating or mid-level bias forces safe tri-state shutdown. |
| FCCM (Pin 2) | Diode emulation control | LOW enables discontinuous conduction mode (DCM); HIGH forces CCM; floating triggers 3µA PS4 shutdown. |
| BOOT (Pin 3) | Bootstrap supply node | Connects to PHASE via 0.1–0.22µF ceramic capacitor to drive high-side MOSFET gate above VIN. |
| GH (Pins 4, 19, 20) | High-side gate driver output | Test/monitor point only; no external load - internal driver directly controls high-side MOSFET gate. |
| PHASE (Pin 5) | Bootstrap return / SW node | Internally tied to SW; external connection unnecessary - serves as AC return for BOOT capacitor. |
| VIN (Pins 6,7,8,22, PAD2) | Main power input | Multiple parallel connections reduce loop inductance; requires local 10µF+ ceramic decoupling to GND. |
| GND (Pins 9–12,17,18,21, PAD1) | Power and logic ground | Direct tie to system ground plane via multiple vias; PAD1 provides primary thermal and electrical path. |
| SW (Pins 13–16) | Switch node | High-current junction between MOSFETs; connects directly to output inductor with minimal trace length. |
| VCC (Pins 23,24) | +5V driver bias supply | Requires 1µF X5R/X7R ceramic capacitor to GND; regulated 5V input powers internal logic and gate drivers. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Schottky bootstrap diode | Reduces external component count and improves reliability vs discrete bootstrap solutions (VF = 0.55V typ). |
| Adaptive shoot-through protection | Monitors GH/SW and GL voltages dynamically to eliminate cross-conduction without fixed dead-time programming. |
| Diode emulation with zero-current detection | Enables DCM at light loads with 350ns minimum LG on-time, boosting efficiency below 5A without controller changes. |
| IMVP8 PS4-compliant shutdown | 3µA quiescent current in tri-state FCCM mode satisfies Intel's strict platform sleep-state power budget. |
| High-side gate-to-source resistor (20kΩ) | Prevents unintended turn-on during high dv/dt events on VIN rail - eliminates need for external gate clamping. |
Applications
| Server CPU Core VRM | GPU Power Delivery |
|---|---|
Use Scenario: Single-phase 1.0V/20A core regulator in dual-socket x86 server motherboard using ISL68201 controller. IC Role / Device Role / Timing Role: Primary power stage delivering high-current, low-voltage CPU core supply with dynamic load transient response. Use Value: 35A rating and 2MHz switching enable compact, high-efficiency phase design; PS4 shutdown reduces idle power in datacenter energy budgets. |
Use Scenario: High-density graphics card VRM supplying GPU core voltage (0.8–1.2V) under burst workloads. IC Role / Device Role / Timing Role: Synchronous buck power stage with diode emulation to maintain >90% efficiency at 2–5A light loads. Use Value: Diode emulation and 350ns min LG on-time extend high-efficiency operating range, reducing thermal stress during idle/gaming transitions. |
| Cloud Computing POL Converter | High-End Gaming Console VR |
Use Scenario: Point-of-load converter on AI accelerator card requiring stable 1.8V/15A supply with fast transient response. IC Role / Device Role / Timing Role: Integrated DrMOS stage paired with digital hybrid controller (e.g., ISL68201) for closed-loop voltage regulation. Use Value: 0.5Ω RDS(on) and low parasitic layout minimize conduction loss; 15µs PS4 exit latency ensures rapid wake-up from deep sleep states. |
Use Scenario: Multi-phase VR for next-gen gaming console SoC with aggressive thermal and space constraints. IC Role / Device Role / Timing Role: High-current power stage operating in 500kHz–1MHz range to balance efficiency and EMI performance. Use Value: 3.5×5 mm QFN package and integrated bootstrap diode reduce BOM count and PCB area by >30% vs discrete solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DrMOS power stage applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL99125BDRZ-T | 25A rating, identical pinout and control interface; lower current capacity and higher RDS(on). | Suitable for lower-power CPU cores or memory VRMs where 35A headroom is unnecessary. | Select when thermal budget or cost sensitivity favors reduced current rating without changing layout or firmware. |
| ISL99227BIRZ-T | 60A rating, 32-lead 5×5 PQFN package, adds thermal flag (TMON), OCP flag, and IMON output. | Targeted at multi-phase server VRMs requiring current sensing and fault reporting for digital controllers. | Choose for scalable, higher-current designs needing telemetry and enhanced protection - not drop-in compatible due to different package and pin count. |
Compared with ISL99125BDRZ-T, the ISL99135BDRZ-T delivers 40% higher current in the same footprint, enabling fewer phases per rail; versus ISL99227BIRZ-T, it offers simpler integration and lower cost for applications not requiring current monitoring or thermal flags.
Availability
ISL99135BDRZ-T is available at Aetrix Electronics and suitable for server CPU core VRMs, GPU power delivery systems, and cloud computing POL converters requiring stable component supply, IMVP8 compliance, and high-density power stage integration.
Supply support for ISL99135BDRZ-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 Corporation (acquired Intersil in 2017) is a global leader in microcontrollers, analog, power management, and SoC solutions, serving industrial, automotive, and datacenter markets with ISO9001-certified manufacturing.
The ISL99135BDRZ-T belongs to Renesas' DrMOS power stage product line, engineered specifically for high-frequency, high-efficiency synchronous buck conversion in Intel VR12/VR12.5/IMVP8-compliant computing platforms.
FAQ
What is the maximum switching frequency supported by the ISL99135BDRZ-T?
The ISL99135BDRZ-T supports switching frequencies up to 2MHz, enabling use with small-value inductors and ceramic output capacitors to achieve high power density in space-constrained applications such as server VRMs and gaming console power supplies. This capability is confirmed in the Absolute Maximum Ratings and Typical Performance Characteristics sections of the FN8848 datasheet.
Does the ISL99135BDRZ-T require an external bootstrap diode?
No, the ISL99135BDRZ-T integrates a Schottky bootstrap diode with forward voltage of 0.43–0.65V at 2mA, eliminating the need for an external diode. A 0.1–0.22µF ceramic capacitor must still be placed between BOOT and PHASE pins per the recommended layout in Figure 20 of the FN8848 datasheet.
How does the ISL99135BDRZ-T implement diode emulation, and what is its minimum on-time?
The ISL99135BDRZ-T detects inductor zero-current crossing and disables the low-side MOSFET after a guaranteed minimum on-time of 350ns, enabling true discontinuous conduction mode (DCM) for improved light-load efficiency. This function is controlled by the FCCM pin and operates asynchronously to the PWM signal, as detailed in the Operation section (page 10) of FN8848.
What is the PS4 shutdown current of the ISL99135BDRZ-T, and how is it activated?
The ISL99135BDRZ-T achieves 3µA shutdown supply current (IVCCSD) when the FCCM pin is left floating or biased within its 2.2–2.8V tri-state window - a feature explicitly designed for Intel IMVP8 PS4 compliance. This ultra-low state is verified in Table "Electrical Specifications" (page 6) of FN8848 Rev 4.00.
Is the ISL99135BDRZ-T pin-compatible with the ISL99125BDRZ-T?
Yes, the ISL99135BDRZ-T is pin-compatible with the ISL99125BDRZ-T: both use identical 24-lead 3.5×5 mm QFN packages (L24.3.5x5W), share identical pin functions and assignments, and operate with the same 5V PWM interface and control logic. This allows direct replacement in existing layouts where higher current capability is needed.
ISL99135BDRZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 24-PowerTFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Half Bridge
- Applications:
- DC-DC Converters
- Interface:
- PWM
- Load Type:
- Inductive
- Technology:
- DrMOS
- Rds On (Typ):
- -
- Current - Output / Channel:
- 35A
- Current - Peak Output:
- -
- Voltage - Supply:
- 4.75V ~ 5.25V
- Voltage - Load:
- 0V ~ 25V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Features:
- Bootstrap Circuit, Diode Emulation
- Fault Protection:
- Shoot-Through, UVLO
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-QFN (3.5x5)
ISL99135BDRZ-T FAQ
1.How can I place an order for ISL99135BDRZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL99135BDRZ-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 ISL99135BDRZ-T reliable?
The price and inventory of ISL99135BDRZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL99135BDRZ-T is usually 5 days.
3.What payment methods are accepted for ISL99135BDRZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL99135BDRZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL99135BDRZ-T?
ISL99135BDRZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL99135BDRZ-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 ISL99135BDRZ-T?
For technical support, including ISL99135BDRZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL99135BDRZ-T requirements.
6.How does Aetrix verify that ISL99135BDRZ-T is sourced from the original manufacturer or authorized distributors?
All ISL99135BDRZ-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 ISL99135BDRZ-T meets industry standards.
7.What is the process for return or replacement of ISL99135BDRZ-T?
All ISL99135BDRZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL99135BDRZ-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 ISL99135BDRZ-T part is unused and in its original packaging.
Return procedure for ISL99135BDRZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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