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Alpha & Omega Semiconductor Inc. AOZ5332QI_1
- Part No.:
- AOZ5332QI_1
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- Power Driver Modules
- Package:
- 31-PowerVFQFN Module
- Datasheet:
-
AOZ5332QI_1.pdf
- Description:
- IC POWER STAGE MOD BUCK QFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,794
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Product details
Overview
AOZ5332QI from Alpha & Omega Semiconductor is a high-current DrMOS power stage module integrating asymmetrical high-side and low-side MOSFETs with an integrated gate driver for synchronous buck DC/DC conversion. It delivers 50A continuous output current, supports up to 2MHz switching, operates from 2.5V–25V input, and features PWM/3V–5V logic compatibility and diode emulation mode via SMOD#. It is deployed in high-density VRMs for graphics cards and motherboards.
For engineers reviewing the AOZ5332QI datasheet, pinout, applications, or equivalent options, key selection considerations include its 5x5 QFN-31L package thermal performance, tri-state PWM support, THWN thermal warning output, bootstrap-integrated driver architecture, and asymmetric MOSFET optimization for low-duty-cycle operation.
Technical Context
The AOZ5332QI implements a dual-rail gate drive architecture with separate 5V supplies for control logic (VCC) and MOSFET drivers (PVCC), enabling noise isolation and stable timing. Its internal adaptive dead-time control prevents shoot-through by synchronizing high-side and low-side gate transitions with blanking periods triggered by VSWH and GL edges.
It integrates a bootstrap diode and supports diode emulation mode via SMOD# to improve light-load efficiency, while THWN provides open-drain thermal warning at 150°C junction temperature with 30°C hysteresis - independent of shutdown functionality.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Continuous Output Current | 50A - defines maximum sustained load capability under thermal design limits |
| Peak Pulse Current | 120A @ 10µs - enables short-duration transient response without device stress |
| Input Voltage Range | 2.5V to 25V - supports wide-range buck conversion including 3.3V, 5V, 12V, and 19V rails |
| Switching Frequency | Up to 2MHz - allows compact magnetics and high transient response in POL converters |
| Driver Supply Voltage | 4.5V to 5.5V (PVCC/VCC) - ensures robust gate drive strength and logic margin |
| Thermal Warning Threshold | 150°C junction temperature - alerts system before thermal derating or failure occurs |
| UVLO Threshold | 3.5V (rising) with 400mV hysteresis - prevents erratic operation during brown-out conditions |
Pinout & Package
AOZ5332QI uses a low-profile 5mm × 5mm QFN-31L package with exposed VIN and PGND thermal pads for enhanced heat dissipation. Pin layout is optimized to minimize parasitic loop inductance, with grouped VIN (pins 8–11), PGND (pins 12–15, 28), and VSWH (pins 16–26) terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PWM | Control input | Accepts 3V/5V CMOS logic or tri-state signals; high-impedance when DISB# = 0V |
| SMOD# | Mode select | Pull-low enables diode emulation for asynchronous light-load operation |
| VCC / PVCC | Bias rails | VCC powers logic; PVCC powers gate drivers - decoupled to suppress switching noise coupling |
| BOOT / PHASE | Bootstrap supply path | BOOT–PHASE capacitor (100nF) generates high-side gate drive voltage; integrated bootstrap diode eliminates external component |
| VSWH (pins 16–26) | Switch node | Shared drain-source connection for HS/LS MOSFETs; used for zero-cross detection and anti-overlap control |
| THWN | Thermal monitor | Open-drain output pulled low at 150°C junction temp; resets at 120°C - enables system-level thermal management |
| DISB# | Enable/disable control | Pull-low disables both MOSFETs and minimizes standby current; internal 850kΩ pull-down to AGND |
Key Features
| Feature | Design Value |
|---|---|
| Asymmetrical MOSFET integration | High-side MOSFET optimized for low Qg and fast switching; low-side MOSFET optimized for ultra-low Rds(on) - maximizes efficiency across duty cycle range |
| Integrated bootstrap diode | Eliminates external diode component and associated layout complexity while maintaining reliable high-side drive |
| Tri-state PWM compatibility | Supports controller high-impedance states with 25ns hold-off delay to prevent spurious switching during mode transitions |
| Diode emulation mode | Enables discontinuous conduction mode (DCM) via SMOD# to reduce light-load losses without requiring external diode |
| Thermal warning with hysteresis | THWN asserts at 150°C and releases at 120°C - provides actionable thermal margin without forcing shutdown |
Applications
| Graphics Card VRM | Server Motherboard VRM |
|---|---|
Use Scenario: High-current, multi-phase voltage regulation for GPU core and memory rails under dynamic load. IC Role / Device Role / Timing Role: DrMOS power stage delivering precise PWM-controlled buck conversion with sub-100ns propagation delays and adaptive dead-time control. Use Value: Enables 50A+ per phase with minimal footprint and thermal resistance, supporting PCIe Gen5 GPU power demands. | Use Scenario: Point-of-load regulation for CPU VDD, VDDIO, and memory subsystems in dual-socket server platforms. IC Role / Device Role / Timing Role: Synchronous buck power stage operating up to 2MHz with tri-state PWM support for dynamic phase shedding. Use Value: Reduces output filter size and improves transient response while maintaining >90% efficiency at 30A–50A loads. |
| Gaming Console Power Delivery | AI Accelerator Module |
Use Scenario: Compact, high-efficiency power conversion for SoC and GPU cores in space-constrained console designs. IC Role / Device Role / Timing Role: Integrated DrMOS stage with diode emulation mode for improved light-load efficiency during standby and UI navigation. Use Value: Achieves >85% efficiency at 5A load via SMOD#-enabled DCM, reducing idle power and thermal output. | Use Scenario: High-density, high-reliability power delivery for FPGA or ASIC-based AI inference accelerators with burst-mode workloads. IC Role / Device Role / Timing Role: High-current power stage supporting rapid load transients up to 120A peak with thermal warning feedback to host controller. Use Value: THWN signal enables real-time thermal throttling coordination between power stage and accelerator firmware. |
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 rating; 1.2MHz max frequency; requires external bootstrap diode; no integrated THWN | Lacks thermal warning output and higher peak current capability; suited for lower-power VRMs | Select when cost sensitivity outweighs need for 50A+ current or thermal monitoring |
| ISL99390HRZ-T | 60A continuous rating; 1.5MHz max frequency; integrated current sense; no SMOD# diode emulation | Includes current sensing but omits light-load diode emulation; higher current but less flexible light-load behavior | Prefer when accurate current monitoring is required and light-load efficiency is secondary |
Compared with IR35201MTRPBF and ISL99390HRZ-T, the AOZ5332QI uniquely combines 50A continuous current, 2MHz operation, integrated thermal warning (THWN), and configurable diode emulation - making it optimal for high-performance, thermally constrained VRMs where both peak capability and light-load efficiency matter.
Availability
AOZ5332QI is available at Aetrix Electronics and suitable for graphics card VRMs, server motherboard power delivery, and AI accelerator modules requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for AOZ5332QI 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 & Omega Semiconductor (AOS) is a fabless power semiconductor company specializing in high-efficiency MOSFETs, IGBTs, and integrated power solutions for computing, consumer, and industrial markets.
The AOZ5332QI belongs to AOS's DrMOS product line, designed specifically for high-current, high-frequency point-of-load applications in graphics, server, and gaming platforms where thermal density and transient response are critical.
FAQ
What is the maximum continuous output current rating for the AOZ5332QI?
The AOZ5332QI is rated for 50A continuous output current under specified thermal conditions (PCB temperature = 100°C). It supports higher transient currents - up to 80A for 10ms pulses and 120A for 10µs pulses - enabling robust response to dynamic load steps without exceeding safe operating limits. This rating assumes proper PCB copper area, thermal vias, and airflow per AOS layout guidelines.
Does the AOZ5332QI require an external bootstrap diode?
No, the AOZ5332QI integrates a bootstrap diode internally, eliminating the need for an external component between BOOT and PHASE. This simplifies layout, reduces BOM count, and improves reliability. A 100nF ceramic capacitor must still be placed directly between BOOT (pin 5) and PHASE (pin 7), as specified in the datasheet, to ensure stable high-side gate drive voltage generation.
How does the SMOD# pin affect operation of the AOZ5332QI?
The SMOD# pin controls diode emulation mode: when pulled low, the AOZ5332QI disables low-side MOSFET synchronous rectification and allows body-diode conduction, improving light-load efficiency in discontinuous conduction mode (DCM). When high, the AOZ5332QI operates in standard synchronous mode with complementary PWM-driven gate outputs. An internal 850kΩ pull-down ensures default DCM behavior if left unconnected.
What is the function of the THWN pin on the AOZ5332QI?
The THWN pin is an open-drain thermal warning output that pulls low when the AOZ5332QI junction temperature reaches 150°C, and releases at 120°C due to built-in hysteresis. It does not disable the device - the AOZ5332QI continues operating - but provides a system-level signal for thermal management, fan control, or firmware throttling. A pull-up resistor to VCC is required for active-high monitoring.
Can the AOZ5332QI operate with a 3.3V PWM input signal?
Yes, the AOZ5332QI accepts 3V CMOS logic-level PWM inputs. Its VPWMH threshold is 2.7V (min) and VPWML is 0.72V (max), ensuring reliable recognition of 3.3V logic high/low states. It also supports 5V logic and tri-state operation with a defined 1.35V–1.95V window, making it compatible with a broad range of controllers including Intel VR13/VR14 compliant PMICs and discrete PWM ICs.
AOZ5332QI_1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Series:
- -
- Package/Case:
- 31-PowerVFQFN Module
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- MOSFET
- Configuration:
- 1 Phase
- Current:
- 50 A
- Voltage:
- -
- Voltage - Isolation:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
AOZ5332QI_1 FAQ
1.How can I place an order for AOZ5332QI_1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AOZ5332QI_1 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 AOZ5332QI_1 reliable?
The price and inventory of AOZ5332QI_1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOZ5332QI_1 is usually 5 days.
3.What payment methods are accepted for AOZ5332QI_1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOZ5332QI_1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AOZ5332QI_1?
AOZ5332QI_1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AOZ5332QI_1 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 AOZ5332QI_1?
For technical support, including AOZ5332QI_1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOZ5332QI_1 requirements.
6.How does Aetrix verify that AOZ5332QI_1 is sourced from the original manufacturer or authorized distributors?
All AOZ5332QI_1 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 AOZ5332QI_1 meets industry standards.
7.What is the process for return or replacement of AOZ5332QI_1?
All AOZ5332QI_1 units undergo pre-shipment inspection (PSI). If there is an issue with AOZ5332QI_1, 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 AOZ5332QI_1 part is unused and in its original packaging.
Return procedure for AOZ5332QI_1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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