My Inquiry
My Account
Alpha & Omega Semiconductor Inc. AOZ5049QI
- Part No.:
- AOZ5049QI
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- Power Driver Modules
- Package:
- 24-PowerTFQFN Module
- Datasheet:
-
AOZ5049QI.pdf
- Description:
- MOD SYNC BUCK POWER STAGE 30A 25
- Quantity:
- Payment:
- Shipping:
Inventory:4,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AOZ5049QI from Alpha & Omega Semiconductor is a high-current DrMOS power module integrating asymmetrical HS/LS MOSFETs and a gate driver in a single 3.5mm × 5mm QFN-24L package. It delivers up to 35A output current, supports 4.5V–25V input, operates up to 2MHz, and features integrated bootstrap Schottky diode and tri-state PWM/FCCM inputs for IMVP8-compliant VRMs in server and notebook applications.
For engineers reviewing the AOZ5049QI datasheet, pinout, applications, or equivalent options, key selection considerations include its 35A continuous rating, dual-mode FCCM control for CCM/diode emulation, UVLO protection at 3.4V, thermal resistance of 3°C/W (junction-to-case), and compatibility with high-frequency point-of-load designs requiring low EMI and minimal PCB layout parasitics.
Technical Context
The AOZ5049QI implements an adaptive dead-time control architecture that monitors VSWH and gate voltage edges to prevent shoot-through while minimizing conduction overlap. Its HS MOSFET is optimized for low Qg and fast switching under low-duty-cycle operation, while the LS MOSFET features ultra-low RDS(ON) to reduce conduction loss.
Control logic accepts TTL-level PWM and tri-state-compatible FCCM inputs, enabling seamless integration with IMVP8-compliant controllers. The integrated bootstrap diode eliminates external components, and the single-pin shutdown/diode-emulation function simplifies system-level sequencing without additional logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | Up to 35A continuous - enables single-module CPU core rail delivery in high-performance VRMs. |
| Input Voltage Range | 4.5V to 25V - supports wide-input server and notebook power rails including 12V and 19V systems. |
| Switching Frequency | 200kHz to 2MHz - allows compact magnetics and high transient response in POL converters. |
| Driver Supply (VCC) | 4.5V to 5.5V - matches standard 5V bias rails and ensures robust gate drive under load transients. |
| Junction-to-Case Thermal Resistance | 3°C/W - enables direct thermal coupling to heatsink or PCB copper for high-power density layouts. |
| UVLO Threshold | 3.4V rising with 500mV hysteresis - prevents erratic startup and ensures stable gate drive before PWM activation. |
| Package | 3.5mm × 5mm QFN-24L with exposed VIN/PGND pads - minimizes loop inductance and enhances thermal dissipation. |
Pinout & Package
AOZ5049QI uses a thermally enhanced 3.5mm × 5mm QFN-24L package with dual exposed pads (VIN and PGND) for low-inductance power routing and efficient heat transfer. Pin numbering follows top-view orientation with Pin 1 marked by dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PWM | Primary control input | TTL-compatible signal controlling HS/LS gate timing; supports tri-state for automatic shutdown. |
| FCCM | Mode select input | High = CCM operation; Low = diode emulation mode; High-Z = full shutdown of both MOSFETs. |
| BOOT | HS gate driver supply | Connects to VSWH via 100nF ceramic capacitor to generate floating 5V rail for HS gate drive. |
| GH | High-side gate driver output | Drives HS MOSFET gate; not intended for external probing-internal connection only. |
| VSWH | Switching node | Common drain-source node of HS/LS MOSFETs; used for bootstrap capacitor return and zero-cross detection. |
| VIN (Pins 6,7,8,22) | High-voltage input | Dedicated high-current paths for 4.5–25V input; multiple pins reduce impedance and improve thermal spreading. |
| PGND (Pins 9–12,17–18,21) | Power ground | Multiple low-inductance returns for power stage and LS gate driver; critical for EMI suppression. |
| GL (Pins 19,20) | Low-side gate driver output | Drives LS MOSFET gate; internally clamped and protected against overvoltage during diode emulation. |
| VCC | Driver bias supply | 5V rail for internal logic and LS gate driver; requires 2.2µF MLCC directly to PGND (Pin 21). |
| NC | No connect | Pin 23 has no internal connection; optional tie to Pin 24 yields no functional impact. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated bootstrap Schottky diode | Eliminates external diode, reducing BOM count and PCB area while improving reliability in high-frequency bootstrapping. |
| Tri-state compatible PWM/FCCM inputs | Enables controller-initiated shutdown and mode transitions without external pull-up/down resistors or level shifters. |
| Adaptive dead-time control | Monitors VSWH and gate edges to dynamically adjust turn-on delay, preventing shoot-through across all load and temperature conditions. |
| Diode emulation mode | Activates LS body-diode conduction under light-load conditions to improve efficiency without external circuitry. |
| Optimized pinout for low-inductance routing | VIN and PGND pins clustered on opposite sides minimize primary switching loop area, directly lowering EMI and voltage spikes. |
Applications
| Server VRMs | Notebook Core Power |
|---|---|
Use Scenario: High-current CPU voltage regulation in dual-socket servers with dynamic load steps exceeding 100A/µs. IC Role / Device Role / Timing Role: DrMOS power stage implementing synchronous buck conversion per IMVP8 spec, driven by digital multiphase controller. Use Value: 35A rating and 2MHz capability enable fewer phases and smaller inductors, reducing board space and improving transient response. | Use Scenario: Compact, high-efficiency core rail for mobile CPUs in ultrabooks with strict thermal envelope limits. IC Role / Device Role / Timing Role: Single-phase POL converter delivering 1V @ 25A with diode emulation for light-load efficiency. Use Value: Integrated bootstrap diode and tri-state shutdown simplify power sequencing and reduce component count in space-constrained designs. |
| Graphics Card VRMs | Gaming Console SoC Power |
Use Scenario: GPU core voltage regulation under burst workloads with rapid 0–30A transitions. IC Role / Device Role / Timing Role: High-frequency DrMOS stage supporting >1.5MHz switching to minimize output capacitance and ripple. Use Value: 3°C/W RθJC enables direct thermal coupling to heatsink, maintaining junction temperature below 125°C even at full load. | Use Scenario: Main SoC power delivery in next-gen video game consoles requiring high efficiency at partial load. IC Role / Device Role / Timing Role: Synchronous buck stage operating in diode emulation mode during standby and light gaming. Use Value: FCCM-controlled diode emulation reduces light-load losses by eliminating LS gate drive energy without external control logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DrMOS power stage applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AOZ5048QI | Direct replacement with identical pinout, same 35A rating and 2MHz capability; improved thermal performance (RθJA reduced from 10°C/W to 8.5°C/W). | Recommended for new designs; supports same IMVP8 applications but offers better thermal margin at high ambient temperatures. | Select AOZ5048QI for new designs where long-term availability and enhanced thermal headroom are required. |
| IR35201MTRPBF | 40A-rated DrMOS with 3.3V–25V VIN range; requires external bootstrap diode and separate VCC regulator; different pinout and control interface (SVID vs. PWM/FCCM). | Targets Intel SVID-based platforms; lacks tri-state shutdown and integrated bootstrap, increasing BOM and layout complexity. | Choose IR35201MTRPBF only when SVID compliance is mandatory and controller ecosystem is fixed. |
Compared with AOZ5049QI, AOZ5048QI provides identical functionality with improved thermal resistance and lifecycle support, while IR35201MTRPBF trades integration for SVID protocol compliance-making AOZ5049QI optimal for cost-sensitive, high-frequency PWM-controlled VRMs where simplicity and EMI performance are prioritized.
Availability
AOZ5049QI is available at Aetrix Electronics and suitable for server VRMs, notebook core power, graphics card POL converters, memory modules, and gaming console SoC power delivery requiring stable component supply and high-current density.
Supply support for AOZ5049QI 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 MOSFETs, power ICs, and DrMOS modules for high-efficiency power conversion.
The AOZ5049QI belongs to AOS's DrMOS product line, engineered specifically for IMVP8-compliant voltage regulator modules in computing applications demanding high current, fast transient response, and minimal EMI.
FAQ
What is the maximum recommended operating frequency for AOZ5049QI?
The AOZ5049QI supports switching frequencies from 200kHz up to 2MHz. At 2MHz, it maintains stable operation with appropriate layout and component selection-including low-ESR input capacitors placed adjacent to VIN/PGND pins and minimized VSWH loop area. Performance data in the datasheet confirms efficiency and thermal behavior at 2MHz under 12V input and 1V output conditions.
Does AOZ5049QI require an external bootstrap diode?
No, AOZ5049QI integrates a bootstrap Schottky diode internally. This eliminates the need for an external diode, reducing BOM count, PCB footprint, and potential failure points. The BOOT pin connects directly to VSWH via a 100nF ceramic capacitor, and the internal diode handles charge replenishment during each switching cycle.
How does the FCCM pin control diode emulation mode in AOZ5049QI?
When the FCCM pin is driven low, AOZ5049QI activates diode emulation mode for the LS MOSFET-allowing body-diode conduction during light-load or pre-bias conditions to improve efficiency. When FCCM is high, the device operates in standard CCM with complementary HS/LS gate drive. A high-impedance FCCM input shuts down both MOSFETs.
What is the purpose of the multiple VIN and PGND pins on AOZ5049QI?
The AOZ5049QI features four VIN pins (6,7,8,22) and eight PGND pins (9–12,17–18,21) to minimize DC resistance and AC impedance in high-current paths. This multi-pin configuration reduces voltage drop, improves thermal spreading across the exposed pads, and lowers parasitic inductance in the primary switching loop-critical for EMI reduction and stable 2MHz operation.
Is AOZ5049QI pin-compatible with AOZ5048QI?
Yes, AOZ5049QI is pin-compatible with AOZ5048QI. Both devices share identical 3.5mm × 5mm QFN-24L packaging, pin assignment, and electrical interface. AOZ5048QI is designated as the replacement product for AOZ5049QI in new designs, offering identical functionality with enhanced thermal performance and continued long-term availability.
AOZ5049QI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Series:
- -
- Package/Case:
- 24-PowerTFQFN Module
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- MOSFET
- Configuration:
- 1 Phase
- Current:
- 35 A
- Voltage:
- -
- Voltage - Isolation:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
AOZ5049QI FAQ
1.How can I place an order for AOZ5049QI through Aetrix?
Please submit a Request for Quotation (RFQ) for AOZ5049QI 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 AOZ5049QI reliable?
The price and inventory of AOZ5049QI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOZ5049QI is usually 5 days.
3.What payment methods are accepted for AOZ5049QI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOZ5049QI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AOZ5049QI?
AOZ5049QI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AOZ5049QI 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 AOZ5049QI?
For technical support, including AOZ5049QI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOZ5049QI requirements.
6.How does Aetrix verify that AOZ5049QI is sourced from the original manufacturer or authorized distributors?
All AOZ5049QI 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 AOZ5049QI meets industry standards.
7.What is the process for return or replacement of AOZ5049QI?
All AOZ5049QI units undergo pre-shipment inspection (PSI). If there is an issue with AOZ5049QI, 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 AOZ5049QI part is unused and in its original packaging.
Return procedure for AOZ5049QI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AOZ5049QI 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…
