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Alpha & Omega Semiconductor Inc. AOD472
- Part No.:
- AOD472
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- FETs, MOSFETs
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
AOD472.pdf
- Description:
- MOSFET N-CH 25V 55A TO252
- Quantity:
- Payment:
- Shipping:
Inventory:4,616
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Product details
Overview
AOD472 from Alpha & Omega Semiconductor is an N-channel enhancement-mode MOSFET in TO-252 (D-PAK) package, rated for 25 V VDS, 55 A continuous drain current at TC = 25°C, and RDS(ON) < 6 mΩ at VGS = 10 V. It features low gate charge (Qg = 41–50 nC), 100% UIS tested, and is optimized for high-efficiency PWM load switching in DC-DC converters and motor control circuits.
For engineers reviewing the AOD472 datasheet, pinout, applications, or equivalent options, key selection criteria include its 25 V breakdown voltage, sub-6 mΩ on-resistance at 10 V drive, 55 A thermal-limited current capability, and robust body-diode recovery (trr = 30–36 ns, Qrr = 19–23 nC) for synchronous rectification and inductive switching.
Technical Context
The AOD472 employs trench-gate technology to achieve low RDS(ON) and fast switching with controlled gate resistance (Rg = 0.86–1.5 Ω). Its dynamic parameters-Ciss = 2050–2460 pF, Coss = 485–600 pF, and Qgd = 8.2–11.5 nC-are specified at VDS = 12.5 V and support high-frequency operation up to several hundred kHz.
Thermal design is enabled by RθJC = 2.5 °C/W (steady-state) and RθJA = 43 °C/W (1 in² FR-4, 2 oz Cu), allowing 50 W power dissipation at TC = 25°C. The device supports repetitive avalanche energy (EAR = 125 mJ, L = 0.1 mH) and operates across –55°C to +175°C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDS | 25 V - Maximum drain-source blocking voltage; defines use in ≤24 V systems like automotive body electronics and 24 V industrial supplies. |
| ID (continuous) | 55 A at TC = 25°C - Thermal-limited conduction capacity; requires heatsinking above ~40°C case temperature. |
| RDS(ON) | <6 mΩ at VGS = 10 V - Enables <1.8 W conduction loss at 30 A, critical for high-current synchronous buck stages. |
| Qg | 41–50 nC - Low total gate charge reduces driver power and enables efficient 500 kHz+ switching with standard gate drivers. |
| trr / Qrr | 30–36 ns / 19–23 nC - Fast, low-charge body diode recovery minimizes shoot-through risk and losses in half-bridge configurations. |
| RθJC | 2.5 °C/W - Junction-to-case thermal resistance confirms compatibility with standard D-PAK heatsink pads and thermal vias. |
Pinout & Package
Package: TO-252 (D-PAK), surface-mount, single-die N-channel MOSFET with exposed drain pad for thermal and electrical connection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| G (Gate) | Control terminal | Receives 0–10 V logic-level signal; low input capacitance (Ciss ≈ 2.3 nF) eases driving with microcontroller GPIO or dedicated gate drivers. |
| D (Drain) | High-side switch node | Connected to exposed copper pad; carries full load current and must be routed with wide copper for thermal and current handling. |
| S (Source) | Reference/return path | Common return for gate drive and load current; ties to system ground or low-side switch source in half-bridge topologies. |
Key Features
| Feature | Design Value |
|---|---|
| Advanced trench process | Delivers RDS(ON) <6 mΩ at 10 V while maintaining ruggedness-enables smaller PCB area vs. planar MOSFETs at same current rating. |
| 100% UIS tested | Guarantees unclamped inductive switching robustness up to 125 mJ, eliminating need for external snubbers in relay or solenoid drive. |
| Low Qgd/Qg ratio | Qgd = 8.2–11.5 nC of total Qg = 41–50 nC - Improves Miller immunity and enables stable hard-switching without gate oscillation. |
| Body diode with fast trr | trr = 30–36 ns at IF = 20 A, dI/dt = 100 A/µs - Supports synchronous rectification in buck converters without external Schottky diodes. |
Applications
| DC-DC Synchronous Buck Converter | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: High-current 12 V to 3.3 V/5 V conversion for infotainment and ADAS ECUs. IC Role / Device Role / Timing Role: Low-side synchronous rectifier MOSFET in dual-phase buck regulator. Use Value: Sub-6 mΩ RDS(ON) cuts conduction loss by >40% vs. 10 mΩ alternatives, improving efficiency from 92% to 94.5% at 20 A output. |
Use Scenario: Load switching for headlights, HVAC actuators, and window lift motors. IC Role / Device Role / Timing Role: High-current N-channel load switch driven by MCU GPIO or LIN transceiver. Use Value: 55 A rating and 100% UIS testing allow direct replacement of mechanical relays, reducing size and enabling PWM dimming control. |
| Industrial Motor Drive Half-Bridge | USB-C Power Delivery Sink Switch |
Use Scenario: 24 V BLDC gate driver stage for small pumps and fans. IC Role / Device Role / Timing Role: High-side or low-side switch in discrete half-bridge with bootstrap gate drive. Use Value: Fast trr and low Qrr prevent cross-conduction during dead-time, enabling reliable 100 kHz operation without shoot-through failure. |
Use Scenario: Input power path switch for 20 V/5 A USB-C PD sink applications. IC Role / Device Role / Timing Role: Reverse-polarity and overcurrent protection switch upstream of buck controller. Use Value: 25 V VDS margin accommodates 20 V PD transient surges; low RDS(ON) limits voltage drop to <150 mV at 5 A, preserving VBUS regulation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar N-channel MOSFET applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IRLML0030TRPBF | VDS = 30 V, RDS(ON) = 12 mΩ @ 4.5 V, SOT-23 package, ID = 4.3 A | Lower current rating and higher on-resistance; suitable only for ≤5 A loads. | Select when board space is constrained and thermal budget allows higher conduction loss. |
| DMN2053UVT-7 | VDS = 20 V, RDS(ON) = 4.5 mΩ @ 4.5 V, X1-DFN package, ID = 40 A | Lower voltage rating (20 V) limits use to ≤15 V systems; no 25 V surge margin. | Prefer for compact 12 V applications where 25 V headroom is unnecessary and DFN thermal performance is prioritized. |
Compared with IRLML0030TRPBF and DMN2053UVT-7, the AOD472 uniquely balances 25 V rating, 55 A current capability, and <6 mΩ RDS(ON) in a thermally robust TO-252 package-making it optimal for 24 V industrial and automotive loads requiring both surge tolerance and high efficiency.
Availability
AOD472 is available at Aetrix Electronics and suitable for DC-DC converters, automotive load switching, industrial motor drives, and USB-C power delivery systems requiring stable component supply and long-term production continuity.
Supply support for AOD472 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-performance MOSFETs, IGBTs, and power ICs for computing, consumer, and industrial markets.
The AOD472 belongs to AOS's "AlphaMOS" trench-MOSFET product line, engineered for high-current, low-voltage switching applications where RDS(ON), gate charge, and body-diode performance are co-optimized.
FAQ
What is the maximum continuous drain current rating for the AOD472?
The AOD472 has a maximum continuous drain current (ID) of 55 A at case temperature TC = 25°C. At TC = 100°C, this derates to 20 A. Actual usable current depends on PCB layout, heatsinking, and ambient conditions-designers should reference the SOA curve in Figure 9 and thermal impedance plots in Figures 10 and 11 to validate operation under target conditions. The AOD472's RθJC = 2.5 °C/W enables effective thermal management when mounted to a copper pour or heatsink.
Is the AOD472 suitable for 12 V automotive applications?
Yes, the AOD472 is well-suited for 12 V automotive applications such as BCM load switching and fan motor control. Its 25 V VDS rating provides margin against load-dump transients (up to ISO 7637-2 Pulse 5a: +120 V for 50 ms), and its 100% UIS testing ensures reliability during inductive turn-off events. The AOD472 operates across –55°C to +175°C junction temperature, meeting AEC-Q101 stress-test requirements when qualified per AOS's automotive-grade variants-confirm qualification status via AOS datasheet revision notes before deployment.
Does the AOD472 have logic-level gate drive capability?
Yes, the AOD472 is a logic-level MOSFET with VGS(th) = 1.2–2.5 V and RDS(ON) < 9.5 mΩ at VGS = 4.5 V, enabling direct drive from 3.3 V or 5 V microcontrollers without level-shifting. However, full performance (RDS(ON) < 6 mΩ, lowest Qg-related losses) is achieved at VGS = 10 V. For 3.3 V systems, verify gate driver output capability and ensure sufficient VGS margin above threshold across temperature and manufacturing variation.
What is the body diode forward voltage of the AOD472?
The AOD472 body diode forward voltage (VSD) is 0.74–1.0 V at IS = 1 A and VGS = 0 V, per the datasheet's Figure 6. This low VSD reduces conduction loss during freewheeling in synchronous buck or half-bridge topologies. Combined with trr = 30–36 ns and Qrr = 19–23 nC, the body diode supports efficient operation without external Schottky diodes in many medium-frequency designs.
Can the AOD472 replace the AOD4184 in existing designs?
No-the AOD472 and AOD4184 are not direct replacements. The AOD4184 is rated for 40 V VDS and 75 A ID, while the AOD472 is 25 V/55 A. Swapping them risks overvoltage failure in 36 V or 48 V systems. In 24 V applications with adequate surge margin, the AOD472 may be considered only after verifying that peak VDS never exceeds 25 V and that 55 A meets worst-case current demand. Always revalidate thermal, switching, and SOA performance when substituting MOSFETs-even within the same manufacturer's portfolio.
AOD472 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Series:
- -
- Package/Case:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- FET Type:
- N-Channel
- Technology:
- MOSFET (Metal Oxide)
- Drain to Source Voltage (Vdss):
- 25 V
- Current - Continuous Drain (Id) @ 25°C:
- 55A (Tc)
- Drive Voltage (Max Rds On, Min Rds On):
- 4.5V, 10V
- Rds On (Max) @ Id, Vgs:
- 6mOhm @ 30A, 10V
- Vgs(th) (Max) @ Id:
- 2.5V @ 250µA
- Gate Charge (Qg) (Max) @ Vgs:
- 50 nC @ 10 V
- Vgs (Max):
- ±20V
- Input Capacitance (Ciss) (Max) @ Vds:
- 2460 pF @ 12.5 V
- FET Feature:
- -
- Power Dissipation (Max):
- 2.5W (Ta), 60W (Tc)
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-252 (DPAK)
AOD472 FAQ
1.How can I place an order for AOD472 through Aetrix?
Please submit a Request for Quotation (RFQ) for AOD472 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 AOD472 reliable?
The price and inventory of AOD472 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOD472 is usually 5 days.
3.What payment methods are accepted for AOD472?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOD472 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AOD472?
AOD472 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AOD472 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 AOD472?
For technical support, including AOD472 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOD472 requirements.
6.How does Aetrix verify that AOD472 is sourced from the original manufacturer or authorized distributors?
All AOD472 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 AOD472 meets industry standards.
7.What is the process for return or replacement of AOD472?
All AOD472 units undergo pre-shipment inspection (PSI). If there is an issue with AOD472, 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 AOD472 part is unused and in its original packaging.
Return procedure for AOD472:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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