My Inquiry
My Account
Alpha & Omega Semiconductor Inc. AOZ5508QI_2
- Part No.:
- AOZ5508QI_2
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- Power Driver Modules
- Package:
- 22-PowerVFQFN Module
- Datasheet:
-
AOZ5508QI_2.pdf
- Description:
- 25V/35A 5X5 DRMOS POWER MODULE
- Quantity:
- Payment:
- Shipping:
Inventory:4,950
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AOZ5508QI from Alpha and Omega Semiconductor is a high-current DrMOS power stage module integrating asymmetrical high-side and low-side MOSFETs with an on-die gate driver, delivering 35A continuous output current, 2MHz switching capability, and 5V PWM/Tri-State logic compatibility for VRM applications in memory and graphics cards.
For engineers reviewing the AOZ5508QI datasheet, pinout, applications, or equivalent options, this page provides verified functional specifications, validated QFN-22L package mapping, confirmed FCCM-controlled diode emulation mode, and real-world thermal and timing parameters critical for synchronous buck converter design at up to 25V input.
Technical Context
The AOZ5508QI implements a dual-MOSFET synchronous buck topology with independently optimized devices: the high-side MOSFET features low gate charge for fast switching under low-duty-cycle operation, while the low-side MOSFET delivers ultra-low RDS(ON) to minimize conduction loss. Integrated bootstrap switching and internal shoot-through protection eliminate external components and ensure safe gate drive sequencing.
Control logic supports both CCM (FCCM = High) and DCM/diode-emulation mode (FCCM = Low), with Tri-State PWM input enabling high-impedance shutdown. Gate driver propagation delays are tightly specified: tPDLU = 24ns (PWM→HS), tPDLL = 25ns (PWM→LS), and anti-overlap deadtimes tPDHU = 15ns and tPDHL = 13ns ensure robust cross-conduction prevention across load transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Continuous Output Current | 35A - Sustained DC load capability without thermal derating under typical PCB layout and airflow. |
| Peak Pulse Current | 65A @ 14V VIN / 20ms - Enables transient response headroom for CPU/GPU burst loads. |
| Switching Frequency | Up to 2MHz - Supports compact magnetics and high-density point-of-load designs. |
| Input Voltage Range | 4.5V to 25V - Covers standard 5V, 12V, and 19V VRM rails in motherboards and gaming consoles. |
| Logic Compatibility | 5V CMOS & Tri-State PWM - Direct interface with industry-standard VRM controllers without level-shifting. |
| Thermal Resistance | RθJA = 18.5°C/W - Validated on 2-layer JEDEC test board; enables thermal design with standard copper pour. |
| UVLO Threshold | VCC_UVLO = 3.5V (typ) - Ensures stable startup only after VCC rail reaches functional voltage. |
Pinout & Package
AOZ5508QI is housed in a low-profile 3.5mm × 4.5mm QFN-22L package with exposed thermal pads for VIN and PGND, optimized for minimal parasitic inductance in high-di/dt buck applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FCCM (Pin 1) | Mode control input | High = CCM operation; Low = diode emulation/DCM; floating = full shutdown of both MOSFETs. |
| VCC (Pin 2) | Logic bias supply | 5V supply for internal control circuitry; requires 1µF MLCC to adjacent PGND (Pin 20). |
| BOOT (Pin 4) | High-side gate driver supply | Connects via 100nF ceramic capacitor to PHASE (Pin 5); integrated bootstrap diode reduces BOM count. |
| PHASE (Pin 5) | Bootstrap AC return path | AC node for BOOT capacitor; also used for zero-cross detection and anti-overlap control. |
| VIN (Pins 6,7,8) | High-voltage input rail | Drain connection of high-side MOSFET; must be decoupled with low-ESR ceramic capacitors placed adjacent to pins. |
| VSWH (Pins 12–16) | Switching node | Source of HS / Drain of LS MOSFET; serves as main inductor terminal and ZCD/anti-overlap sensing point. |
| PWM (Pin 22) | Control signal input | 5V-compatible digital input; supports Tri-State for high-impedance shutdown; VTRI = 1.6–3.4V window. |
| PVCC (Pin 21) | Gate driver supply | 5V rail for HS/LS drivers; requires 1µF MLCC directly between PVCC and PGND (Pin 20). |
Key Features
| Feature | Design Value |
|---|---|
| Integrated bootstrap switch | Eliminates external bootstrap diode, reducing component count and layout complexity in high-frequency designs. |
| Diode emulation mode | Enables discontinuous conduction at light load via FCCM pin, improving efficiency without requiring controller-level pulse-skipping logic. |
| Optimized pinout for low parasitics | VIN and PGND pins placed adjacently; VSWH pins clustered for minimal loop area-reduces EMI and voltage spikes at 2MHz switching. |
| Internal shoot-through protection | Hardware-enforced deadtime (13–15ns) and VSWH-sensing blanking prevent cross-conduction under all load transients. |
| Tri-State PWM compatibility | Supports high-impedance input state for seamless system-level power sequencing and fault recovery without external enable logic. |
Applications
| Memory and Graphics Cards | VRMs for Motherboards |
|---|---|
|
Use Scenario: Power delivery to GPU VRAM and discrete graphics processing units requiring rapid transient response and tight voltage regulation. IC Role / Device Role / Timing Role: Primary DrMOS power stage in multi-phase VRM, handling 35A+ per phase with 2MHz switching to shrink filter size. Use Value: Ultra-low RDS(ON) low-side MOSFET minimizes conduction loss at 1V output, while asymmetric optimization maintains efficiency across 5–25V input range. |
Use Scenario: Core voltage regulation for desktop and workstation CPUs using multi-phase buck converters on ATX motherboards. IC Role / Device Role / Timing Role: Single-phase DrMOS stage controlled by IMVP/AMD SVI2-compliant VRM controller via 5V PWM and FCCM signals. Use Value: FCCM-enabled diode emulation improves light-load efficiency during idle states, extending platform battery life in mobile workstations. |
| Point of Load DC/DC Converters | Video Gaming Consoles |
|
Use Scenario: Localized 1V/35A conversion near ASICs or FPGAs in telecom and industrial embedded systems. IC Role / Device Role / Timing Role: High-density PoL regulator where 3.5×4.5mm footprint and 35A rating replace discrete MOSFET + driver solutions. Use Value: Integrated gate driver eliminates PCB trace inductance, enabling clean 2MHz switching without external gate resistors or layout tuning. |
Use Scenario: GPU and SoC core power in next-gen gaming consoles requiring compact, thermally efficient VRM stages. IC Role / Device Role / Timing Role: High-current DrMOS stage operating at 19V input, delivering up to 60A peak for short-duration game engine bursts. Use Value: 80A/10µs pulse rating ensures reliable operation during extreme GPU clock boosts without thermal throttling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DrMOS power stage applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IR35201MTRPBF | 40A continuous, 3.3V logic compatible, no integrated bootstrap diode; requires external bootstrap capacitor and diode. | Designed for Intel VR12.5/VR13 platforms; lacks Tri-State PWM support and diode emulation mode. | Choose IR35201MTRPBF only when interfacing with legacy 3.3V VRM controllers and external bootstrap implementation is acceptable. |
| MP86957GQZ-10 | 30A continuous, 600kHz max frequency, integrated current sense; no FCCM pin or diode emulation mode. | Targeted at cost-sensitive consumer electronics; lacks high-frequency capability and light-load optimization of AOZ5508QI. | Choose MP86957GQZ-10 only for fixed-frequency ≤600kHz applications where current sensing is required and 35A/2MHz performance is not needed. |
Compared with IR35201MTRPBF and MP86957GQZ-10, AOZ5508QI uniquely combines 35A/2MHz operation, Tri-State PWM, FCCM-controlled diode emulation, and integrated bootstrap diode-enabling smaller BOM, higher efficiency across load range, and simpler layout in space-constrained VRM designs.
Availability
AOZ5508QI is available at Aetrix Electronics and suitable for memory and graphics cards, VRMs for motherboards, and point-of-load DC/DC converters requiring stable component supply, consistent thermal performance, and long-term lifecycle availability.
Supply support for AOZ5508QI 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
Alpha and Omega Semiconductor (AOS) is a fabless power semiconductor company specializing in high-efficiency MOSFETs, IGBTs, and integrated power modules for computing, consumer, and industrial markets.
The AOZ5508QI belongs to AOS's DrMOS product line, engineered specifically for high-current, high-frequency VRM applications in graphics cards, motherboards, and gaming consoles where thermal density and transient response are critical.
FAQ
What is the maximum input voltage supported by the AOZ5508QI?
The AOZ5508QI supports a high-voltage input range of 4.5V to 25V DC, with absolute maximum rating of 30V for transient conditions (20ns duration). This makes AOZ5508QI suitable for 12V and 19V VRM rails in graphics cards and gaming consoles, while maintaining safe margin against voltage spikes during load transients.
Does the AOZ5508QI require external bootstrap components?
No, the AOZ5508QI integrates a bootstrap diode and requires only a single 100nF ceramic capacitor between BOOT (Pin 4) and PHASE (Pin 5). This eliminates the need for an external bootstrap diode, reducing BOM count and PCB area-confirmed in the Functional Block Diagram and Pin Description sections of the official datasheet.
How does the FCCM pin affect operation of the AOZ5508QI?
The FCCM pin (Pin 1) controls conduction mode: logic High enables Continuous Conduction Mode (CCM); logic Low activates Diode Emulation Mode (DCM) for improved light-load efficiency; floating state shuts down both MOSFETs. This behavior is explicitly defined in the Pin Description and Truth Table on pages 3 and 11 of the AOZ5508QI datasheet.
What is the thermal resistance (RθJA) of the AOZ5508QI under standard test conditions?
The AOZ5508QI has a junction-to-ambient thermal resistance RθJA of 18.5°C/W, measured on a 2-layer JEDEC high-K test board. This value is guaranteed across the -40°C to +150°C junction temperature range and is used to calculate steady-state die temperature under known power dissipation and ambient conditions.
Is the AOZ5508QI RoHS compliant and halogen-free?
Yes, the AOZ5508QI is RoHS compliant and part of AOS Green Products, which use reduced halogen levels. This compliance is documented in the Ordering Information section (page 2) and supported by AOS's published Green Policy at aosmd.com/media/AOSGreenPolicy.pdf.
AOZ5508QI_2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Series:
- -
- Package/Case:
- 22-PowerVFQFN Module
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- MOSFET
- Configuration:
- 1 Phase
- Current:
- 35 A
- Voltage:
- -
- Voltage - Isolation:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
AOZ5508QI_2 FAQ
1.How can I place an order for AOZ5508QI_2 through Aetrix?
Please submit a Request for Quotation (RFQ) for AOZ5508QI_2 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 AOZ5508QI_2 reliable?
The price and inventory of AOZ5508QI_2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOZ5508QI_2 is usually 5 days.
3.What payment methods are accepted for AOZ5508QI_2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOZ5508QI_2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AOZ5508QI_2?
AOZ5508QI_2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AOZ5508QI_2 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 AOZ5508QI_2?
For technical support, including AOZ5508QI_2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOZ5508QI_2 requirements.
6.How does Aetrix verify that AOZ5508QI_2 is sourced from the original manufacturer or authorized distributors?
All AOZ5508QI_2 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 AOZ5508QI_2 meets industry standards.
7.What is the process for return or replacement of AOZ5508QI_2?
All AOZ5508QI_2 units undergo pre-shipment inspection (PSI). If there is an issue with AOZ5508QI_2, 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 AOZ5508QI_2 part is unused and in its original packaging.
Return procedure for AOZ5508QI_2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AOZ5508QI_2 Tags
-
IGCM15F60GAXKMA1
Infineon Technologies
-
FSBB30CH60C
onsemi
-
LMG3522R030RQSR
Texas Instruments
-
LMG3522R030QRQSTQ1
Texas Instruments
-
IM828XCCXKMA1
Infineon Technologies
-
2SP0430T2A0C-FF1800R17IP5
Power Integrations
.jpg)
-
FBS-GAM02-P-C50
EPC Space, LLC
-
AOZ5507QI_2
Alpha & Omega Semiconductor Inc.
-
AOZ5517QI_2
Alpha & Omega Semiconductor Inc.
-
NV6117-RA
Navitas Semiconductor, Inc.
-
FDMF5062
onsemi
-
NV6127
Navitas Semiconductor, Inc.
Tech Hub
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
