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Alpha & Omega Semiconductor Inc. AOZ5332QI-C_1
- Part No.:
- AOZ5332QI-C_1
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- Power Driver Modules
- Package:
- 31-PowerVFQFN Module
- Datasheet:
-
AOZ5332QI-C_1.pdf
- Description:
- IC POWER STAGE MOD BUCK QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,327
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Product details
Overview
AOZ5332QI-C_1 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 Tri-State PWM compatibility and diode emulation mode via SMOD#. It is deployed in VRMs for high-performance computing and graphics cards.
For engineers reviewing the AOZ5332QI-C_1 datasheet, pinout, applications, or equivalent options, key selection criteria include its 5x5 QFN-31L thermal performance, bootstrap-integrated high-side drive, THWN thermal warning output, and discrete control of CCM vs. DCM operation via SMOD#.
Technical Context
The AOZ5332QI-C_1 implements a dual-MOSFET synchronous buck topology with independently optimized high-side (low QG, low capacitance) and low-side (ultra-low RDS(on)) devices. Its integrated driver includes adaptive dead-time control, shoot-through protection, and zero-cross detection circuitry tied to 11 parallel VSWH pins for accurate phase sensing.
It accepts 3V/5V CMOS-level PWM inputs with Tri-State support, uses separate 5V supplies for logic (VCC) and gate drivers (PVCC), and integrates a bootstrap diode. Thermal monitoring is implemented via open-drain THWN output asserting at 150°C junction temperature with 30°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Continuous Output Current | 50A - Sustained load capability under thermal design limits with proper PCB copper area and airflow. |
| Peak Pulse Current | 120A @ 10µs - Supports transient load demands in CPU/GPU VRMs without device failure. |
| Input Voltage Range | 2.5V to 25V - Enables use across DDR memory rails, GPU core, and motherboard VRM stages. |
| Switching Frequency | Up to 2MHz - Enables compact magnetics and fast transient response in space-constrained designs. |
| Driver Supply Voltage | 4.5V to 5.5V (VCC/PVCC) - Ensures robust gate drive strength and noise immunity for both MOSFETs. |
| Thermal Warning Threshold | 150°C junction (THWN active low) - Provides early overtemperature indication before thermal shutdown. |
| Package Thermal Resistance | RθJC = 2.5°C/W - Enables direct heatsink attachment or high-copper PCB thermal management. |
Pinout & Package
AOZ5332QI-C_1 is housed in a low-profile 5mm × 5mm QFN-31L package with exposed VIN and PGND thermal pads. The pin layout minimizes parasitic inductance via adjacent high-current input (VIN) and ground (PGND) pins, and dedicates 11 pins to VSWH for distributed switching-node connection and zero-cross detection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PWM | Control input signal | Accepts 3V/5V CMOS logic; enters high-impedance state when DISB# = 0V for system-level disable coordination. |
| SMOD# | Diode emulation mode control | Pull-low enables asynchronous operation at light load, improving efficiency without external diode. |
| VCC / PVCC | Bias and gate driver supplies | VCC powers logic; PVCC powers gate drivers-both require local 1µF MLCC bypass to AGND/PGND. |
| BOOT / PHASE | High-side gate drive supply path | BOOT connects to PHASE via 100nF capacitor; internal bootstrap diode eliminates external component. |
| VIN (Pins 8–11) | High-voltage input rail | Four dedicated pins reduce current density and package inductance; connect directly to input bulk capacitors. |
| PGND (Pins 12–15, 28) | Power ground return | Five dedicated PGND pins + one driver ground pin ensure low-impedance return for high di/dt currents. |
| VSWH (Pins 16–26) | Switching node | 11 parallel pins serve as inductor connection point and provide redundant paths for ZCD and anti-overlap control. |
| THWN | Thermal warning indicator | Open-drain output pulled low at 150°C junction; requires external pull-up to VCC for system monitoring. |
| DISB# | Global disable control | Pull-low disables both MOSFETs and reduces standby current; internal 850kΩ pull-down ensures safe default state. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated bootstrap diode | Eliminates external diode component and associated layout complexity while maintaining reliable high-side drive. |
| Diode emulation mode (SMOD#) | Enables discontinuous conduction mode during light-load or pre-bias conditions, improving efficiency by ~3–5% at <10% load. |
| Tri-State PWM compatible input | Supports controller-initiated high-impedance states with 25ns hold-off delay to prevent spurious switching during mode transitions. |
| Zero-cross detection (ZCD) | Uses multiple VSWH pins to detect switching node crossing with <10ns propagation delay, enabling precise dead-time optimization. |
| Thermal warning with hysteresis | THWN asserts at 150°C and clears at 120°C-provides actionable margin before thermal throttling or shutdown. |
Applications
| Memory and Graphic Cards | VRMs for Motherboards |
|---|---|
|
Use Scenario: Power delivery to GDDR6X memory stacks and GPU cores requiring rapid load transients and tight voltage regulation. IC Role / Device Role / Timing Role: Primary synchronous buck power stage delivering regulated 0.7–1.2V at up to 50A per phase; handles >100A/µs di/dt events. Use Value: Low RDS(on) low-side MOSFET and fast-switching high-side device minimize conduction and switching losses, sustaining >92% efficiency at 30A/12VIN. |
Use Scenario: Multi-phase CPU VRM on ATX or mini-ITX motherboards supporting Intel Core i9 or AMD Ryzen 9 processors. IC Role / Device Role / Timing Role: Single-phase DrMOS stage controlled by digital multiphase controller (e.g., IR35221); synchronized via PWM and current-sense feedback. Use Value: 2MHz capability allows smaller inductors and capacitors; 5x5 QFN footprint enables dense phase interleaving without thermal crowding. |
| Point of Load DC/DC Converters | Video Gaming Console |
|
Use Scenario: Secondary-side regulation for SoC I/O, PCIe switch, or AI accelerator rails in enterprise servers and edge AI systems. IC Role / Device Role / Timing Role: Standalone buck stage accepting 5V or 12V intermediate bus; configured for fixed or dynamically scaled output via VID interface. Use Value: Under-voltage lockout (3.5V VCC threshold) and THWN output enable robust fault handling in unregulated intermediate bus environments. |
Use Scenario: Compact, high-efficiency power stage for custom ASICs and memory subsystems in next-gen gaming consoles (e.g., PS5/Xbox Series X). IC Role / Device Role / Timing Role: High-density VRM phase in thermally constrained chassis; leverages exposed VIN/PGND pads for direct board-level heat spreading. Use Value: RθJC = 2.5°C/W and 11-VSWH pin array allow full 50A operation with only 2-layer thermal PCB, reducing BOM cost 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 |
|---|---|---|---|
| Infineon TDA21472 | Same 5x5 QFN-31L package; higher 70A continuous rating but requires external bootstrap diode and separate VBST supply. | Preferred for >60A single-phase designs where external component count is acceptable for peak performance. | Choose TDA21472 if system-level thermal budget allows higher junction temperature and external bootstrap integration is feasible. |
| ON Semiconductor ISL99390 | 40A continuous rating; supports 3.3V PWM logic only; no THWN pin; lower RDS(on) low-side but slower gate drive propagation (tPD > 40ns). | Suitable for cost-sensitive mid-tier motherboards where thermal warning is handled externally or omitted. | Choose ISL99390 for legacy 3.3V-controller ecosystems where 50A+ is not required and thermal monitoring is system-managed. |
Compared with AOZ5332QI-C_1, the TDA21472 offers higher current headroom at the cost of added external components and reduced integration, while the ISL99390 trades current capability and integrated diagnostics for lower gate drive latency and simpler logic interface-making AOZ5332QI-C_1 the balanced choice for high-efficiency, thermally aware, and layout-optimized VRM designs.
Availability
AOZ5332QI-C_1 is available at Aetrix Electronics and suitable for memory and graphic card power delivery, motherboard VRMs, and point-of-load DC/DC converters requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for AOZ5332QI-C_1 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, power modules, and ICs for computing, consumer, and industrial applications.
The AOZ5332QI-C_1 belongs to AOS's DrMOS product line, engineered specifically for high-frequency, high-current synchronous buck conversion in CPU/GPU voltage regulator modules where integration, thermal performance, and transient response are critical.
FAQ
What is the maximum allowable input voltage for AOZ5332QI-C_1?
The AOZ5332QI-C_1 supports a recommended operating input voltage range of 2.5V to 25V. Its absolute maximum rating for VIN is 30V for transient spikes (≤20ns), but sustained operation above 25V risks exceeding safe junction temperature and violating SOA limits. Always verify derating curves in the datasheet for specific thermal conditions.
Does AOZ5332QI-C_1 require an external bootstrap diode?
No, AOZ5332QI-C_1 integrates the bootstrap diode internally. This eliminates the need for an external diode between PVCC and BOOT, simplifying layout and improving reliability. The BOOT supply is generated using a 100nF ceramic capacitor connected between BOOT (Pin 5) and PHASE (Pin 7).
How does the SMOD# pin affect AOZ5332QI-C_1 operation?
When SMOD# is pulled low, AOZ5332QI-C_1 enables diode emulation mode: the low-side MOSFET is actively controlled to mimic freewheeling diode behavior during light loads, improving efficiency and eliminating reverse recovery losses. When SMOD# is high, the device operates in standard synchronous CCM mode with complementary PWM-driven switching.
What is the function of the THWN pin on AOZ5332QI-C_1?
The THWN pin on AOZ5332QI-C_1 is an open-drain thermal warning output that pulls low when the junction temperature reaches 150°C. It remains asserted until temperature falls to 120°C (30°C hysteresis). This signal enables system-level thermal management without disabling AOZ5332QI-C_1-unlike DISB#, which fully shuts down the device.
Can AOZ5332QI-C_1 be used with a 3.3V PWM controller?
Yes, AOZ5332QI-C_1 is compatible with both 3V and 5V CMOS logic. Its VPWMH threshold is 2.7V (min), and VPWML is 0.72V (max), ensuring reliable recognition of 3.3V logic levels. The Tri-State window (1.35V–1.95V) also functions correctly with 3.3V controllers, allowing seamless high-impedance mode entry and exit.
AOZ5332QI-C_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-C_1 FAQ
1.How can I place an order for AOZ5332QI-C_1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AOZ5332QI-C_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-C_1 reliable?
The price and inventory of AOZ5332QI-C_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-C_1 is usually 5 days.
3.What payment methods are accepted for AOZ5332QI-C_1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOZ5332QI-C_1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AOZ5332QI-C_1?
AOZ5332QI-C_1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AOZ5332QI-C_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-C_1?
For technical support, including AOZ5332QI-C_1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOZ5332QI-C_1 requirements.
6.How does Aetrix verify that AOZ5332QI-C_1 is sourced from the original manufacturer or authorized distributors?
All AOZ5332QI-C_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-C_1 meets industry standards.
7.What is the process for return or replacement of AOZ5332QI-C_1?
All AOZ5332QI-C_1 units undergo pre-shipment inspection (PSI). If there is an issue with AOZ5332QI-C_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-C_1 part is unused and in its original packaging.
Return procedure for AOZ5332QI-C_1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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