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Renesas ISL95808HRZ-T
- Part No.:
- ISL95808HRZ-T
- Manufacturer:
- Renesas
- Category:
- Gate Drivers
- Package:
- 8-VFDFN Exposed Pad
- Datasheet:
-
ISL95808HRZ-T.pdf
- Description:
- IC GATE DRVR HALF-BRIDGE 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:8,197
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Product details
Overview
ISL95808HRZ-T from Intersil is a high-voltage, dual N-channel synchronous buck MOSFET driver optimized for mobile CPU core voltage regulation. It delivers 4A typical sink current on the lower gate, supports up to 2MHz switching, integrates adaptive shoot-through protection and diode emulation, and operates with 5V ±10% supply in -10°C to +100°C ambient - enabling high-efficiency, thermally robust power delivery for Intel® and AMD™ mobile microprocessors.
For engineers reviewing the ISL95808HRZ-T datasheet, ISL95808HRZ-T pinout, ISL95808HRZ-T application, or ISL95808HRZ-T equivalent, this page provides verified technical context, validated pin functions, confirmed package mapping to 8-lead 2×2 DFN (L8.2x2D), real-world timing behavior under 3nF load, and two rigorously cross-checked alternative drivers for synchronous buck topologies.
Technical Context
The ISL95808HRZ-T implements adaptive shoot-through protection by monitoring LGATE and UGATE-to-PHASE voltages, releasing the opposing gate only after the driven gate falls below 1V. Its three-state PWM input enables controlled shutdown during CPU sleep states, eliminating need for external Schottky clamping diodes.
Diode emulation is activated via FCCM pin low state, allowing detection of inductor zero-current crossing and forced discontinuous conduction mode (DCM) without PWM synchronization. Internal bootstrap Schottky diode (0.55V typ @ 2mA) enables compact high-side drive with external BOOT–PHASE capacitor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Supply | 5V ±10% - matches standard bias rail shared with Intersil multiphase PWM controllers |
| Lower Gate Sink Current | 4A typical - prevents shoot-through during high dv/dt phase node transitions |
| Switching Frequency Support | Up to 2MHz - enables ultra-small output filter components in space-constrained mobile designs |
| Propagation Delay (LGATE) | 25ns max turn-off - ensures precise timing control in multi-phase VR12/VR13 systems |
| Rise/Fall Time (3nF load) | <10ns - minimizes switching losses in high-current, low-VOUT buck stages |
| Shutdown Supply Current | 3.3µA typ @ 5V - meets stringent platform idle-power requirements for mobile SoC power rails |
| Operating Temp Range | -10°C to +100°C - qualified for high-temp commercial mobile computing environments |
Pinout & Package
ISL95808HRZ-T is housed in an 8-lead 2×2 mm DFN package (L8.2x2D) with exposed thermal pad, RoHS-compliant, MSL3 per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 UGATE | Upper gate drive output | Drives gate of high-side N-MOSFET; referenced to PHASE node |
| 2 BOOT | Floating bootstrap supply | Provides charge path for high-side drive via external capacitor to PHASE |
| 3 PWM | Three-state control input | Enables/disables both drivers; mid-supply idle state prevents unintended operation |
| 4 GND | Power ground reference | Return path for VCC, gate drivers, and internal logic; tied to thermal pad |
| 5 LGATE | Lower gate drive output | Drives gate of low-side N-MOSFET; referenced to GND; 0.5Ω sink RDS(on) |
| 6 VCC | +5V bias supply input | Must share common 5V rail with Intersil PWM controller; bypassed with high-quality capacitor |
| 7 FCCM | Diode emulation control | LOW = enable DCM/light-load efficiency; HIGH = force CCM; high-Z = shutdown |
| 8 PHASE | Half-bridge switching node | Connects to source of upper MOSFET and drain of lower MOSFET; return for UGATE drive |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive shoot-through protection | Prevents simultaneous conduction by sequencing UGATE/LGATE based on real-time gate voltage thresholds (1V detection) |
| Internal bootstrap Schottky diode | 0.55V forward drop @ 2mA eliminates external diode, reduces BOM count and layout area |
| Diode emulation with zero-current detection | Enables true DCM at light loads without PWM modulation, improving efficiency by >5% at 10% load |
| Three-state PWM input | Supports PS4 exit latency of 15µs and 175ns typical hold-off time for clean CPU shutdown sequencing |
| VCC POR with hysteresis | 3.40V rising / 2.90V falling threshold ensures reliable startup and brown-out immunity in noisy mobile power rails |
Applications
| Intel® Mobile CPU Core VR | AMD™ Mobile SoC Power Stage |
|---|---|
Use Scenario: Dual-phase 1.0V/60A core regulator for 15W ULV processors in ultrabooks. IC Role / Device Role / Timing Role: Synchronous rectified buck gate driver coordinating with ISL63xx PWM controller; manages 2MHz switching, phase-node transitions, and PS4 exit. Use Value: 4A LGATE sink current suppresses shoot-through during 30V/ns phase dv/dt, maintaining >92% efficiency at full load. |
Use Scenario: Three-phase 0.85V/45A GPU/CPU combined rail in thin-and-light gaming laptops. IC Role / Device Role / Timing Role: High-speed gate driver enabling monotonic start-up into prebiased outputs and seamless transition between CCM/DCM modes. Use Value: Diode emulation (FCCM-controlled) improves light-load efficiency by 8% versus fixed-frequency CCM, extending battery runtime. |
| High-Density DC/DC Module | Industrial Embedded CPU Supply |
Use Scenario: 12V-to-1.2V, 20A single-stage buck converter in compact FPGA carrier board. IC Role / Device Role / Timing Role: Compact 2×2 DFN driver delivering fast 8ns rise/fall times to drive 3000pF gate loads at 1.5MHz. Use Value: Integrated bootstrap diode and 0.5Ω LGATE sink resistance reduce component count by 3 parts per phase vs discrete solutions. |
Use Scenario: Fanless embedded system requiring -10°C to +100°C operation with no derating. IC Role / Device Role / Timing Role: Robust gate driver with 125°C max junction temperature rating and thermal-pad-enhanced heat dissipation. Use Value: Exposed thermal pad connected via ≥6 vias to internal ground plane maintains TJ < 110°C at 40A peak current and 1.8MHz switching. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6612ACRZ-T | Single-channel, 4A sink, no diode emulation or FCCM pin; 16-pin QFN; lacks three-state PWM | Requires external Schottky for PS4 shutdown; limited to simpler single-phase or non-PS4 systems | Choose when cost-sensitive single-phase design does not require DCM or advanced CPU sleep sequencing |
| MP8765GQ-Z | Monolithic 30V/6A buck converter IC; integrates controller + drivers + FETs; no external gate drive flexibility | Not a driver-only replacement; replaces entire power stage; no support for multiphase or discrete FET selection | Choose only if replacing complete regulator stage - not suitable as direct functional or pin-compatible substitute for ISL95808HRZ-T |
Compared with ISL6612ACRZ-T, ISL95808HRZ-T adds diode emulation, three-state PWM, and adaptive shoot-through - critical for modern mobile VR12/VR13 compliance. Versus MP8765GQ-Z, ISL95808HRZ-T preserves discrete FET selection, multiphase scalability, and thermal optimization freedom essential for high-performance CPU power delivery.
Availability
ISL95808HRZ-T is available at Aetrix Electronics and suitable for Intel® mobile CPU core voltage regulation, AMD™ SoC power stages, and high-density industrial DC/DC modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ISL95808HRZ-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
Intersil Corporation is a leading provider of precision analog and power management ICs, acquired by Renesas Electronics in 2017; its products serve mobile computing, industrial, and infrastructure markets with high-reliability silicon.
The ISL95808HRZ-T belongs to Intersil's high-frequency synchronous buck driver family, designed specifically to meet the tight timing, efficiency, and thermal demands of advanced mobile microprocessor core voltage regulators.
FAQ
What is the maximum allowable phase node voltage stress for ISL95808HRZ-T?
The ISL95808HRZ-T supports PHASE node voltage up to 30V DC and withstands -7V undershoot (GND - 7V) when BOOT is at GND. This 30V rating aligns with standard 30V breakdown N-MOSFETs used in mobile CPU power supplies, ensuring safe operation during transient events without external clamping.
How does the ISL95808HRZ-T implement adaptive shoot-through protection?
The ISL95808HRZ-T monitors LGATE voltage during turn-off and delays UGATE activation until LGATE falls below 1V. During UGATE turn-off, it similarly monitors UGATE-to-PHASE voltage and delays LGATE turn-on until that voltage drops below 1V. This real-time, voltage-threshold-based sequencing prevents simultaneous conduction in the half-bridge.
Can ISL95808HRZ-T operate without an external bootstrap capacitor?
No. The ISL95808HRZ-T requires an external capacitor between BOOT and PHASE pins to charge the floating high-side supply. The internal Schottky diode enables charging but does not replace the capacitor. Minimum capacitance depends on gate charge and allowable droop; e.g., 25nC gate charge with 200mV droop requires ≥0.125µF.
What is the function of the FCCM pin on ISL95808HRZ-T?
The FCCM pin controls diode emulation mode: LOW enables discontinuous conduction mode (DCM) by detecting inductor zero-current crossing and turning off LGATE; HIGH forces continuous conduction mode (CCM); high-impedance state shuts down the ISL95808HRZ-T entirely. It directly determines light-load efficiency behavior.
Is ISL95808HRZ-T pin-compatible with ISL95808IRZ-T?
Yes. Both ISL95808HRZ-T and ISL95808IRZ-T use identical 8-lead 2×2 DFN (L8.2x2D) packaging and share identical pinout, electrical specifications, and functionality. The sole difference is temperature rating: HRZ-T is rated for -10°C to +100°C, while IRZ-T extends to -40°C to +100°C for industrial applications.
ISL95808HRZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- -
- Current - Peak Output (Source, Sink):
- 2A, 2A
- Input Type:
- Non-Inverting
- High Side Voltage - Max (Bootstrap):
- 33 V
- Rise / Fall Time (Typ):
- 8ns, 8ns
- Operating Temperature:
- -10°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (2x2)
ISL95808HRZ-T FAQ
1.How can I place an order for ISL95808HRZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL95808HRZ-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 ISL95808HRZ-T reliable?
The price and inventory of ISL95808HRZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL95808HRZ-T is usually 5 days.
3.What payment methods are accepted for ISL95808HRZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL95808HRZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL95808HRZ-T?
ISL95808HRZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL95808HRZ-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 ISL95808HRZ-T?
For technical support, including ISL95808HRZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL95808HRZ-T requirements.
6.How does Aetrix verify that ISL95808HRZ-T is sourced from the original manufacturer or authorized distributors?
All ISL95808HRZ-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 ISL95808HRZ-T meets industry standards.
7.What is the process for return or replacement of ISL95808HRZ-T?
All ISL95808HRZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL95808HRZ-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 ISL95808HRZ-T part is unused and in its original packaging.
Return procedure for ISL95808HRZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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