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Home > Products > Discrete Semiconductor Products > Transistors > FETs, MOSFETs > FETs, MOSFETs

Alpha & Omega Semiconductor Inc. AOD498

Name: AOD498
Brand: Alpha & Omega Semiconductor Inc.
SKU: AOD498
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AOD498

Manufacturer:: Alpha & Omega Semiconductor Inc.

Category:: FETs, MOSFETs

Package:: TO-252-3, DPAK (2 Leads + Tab), SC-63

Datasheet:: AOD498.pdf

Description:: MOSFET N-CH 100V 2.5A/11A TO252

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Product details

Overview

AOD498 from Alpha & Omega Semiconductor is a 100V N-Channel enhancement-mode trench MOSFET in TO-252 (DPAK) package, rated for 11A continuous drain current at V_GS=10V, with R_DS(ON) < 140mΩ at 10V and < 152mΩ at 4.5V. It features 100% UIS-tested ruggedness and is optimized for high-efficiency boost converters and synchronous rectifiers in consumer, telecom, and industrial power supplies.

For engineers reviewing the AOD498 datasheet, pinout, applications, or equivalent options, key selection criteria include its low gate charge (Q_g=10–14nC at 10V), fast switching (t_D(on)=4.5ns, t_r=3ns), body-diode recovery performance (t_rr=23ns, Q_rr=100nC), and thermal robustness (R_θJC=3.3°C/W, T_J=175°C).

Technical Context

The AOD498 employs advanced trench-gate process technology to achieve low R_DS(ON) while maintaining strong avalanche capability (E_AS=20mJ, I_AS=8A) and gate oxide reliability. Its gate threshold voltage (1.2–2.3V) supports logic-level drive compatibility, and the integrated body diode exhibits controlled reverse recovery behavior suitable for hard-switched topologies.

Thermal design is enabled by its low junction-to-case resistance (3.3°C/W) and validated steady-state power dissipation of 45W at T_C=25°C. The device is characterized across temperature (–55°C to 175°C) and fully specified for both DC and pulsed operation, including unclamped inductive switching (UIS) and repetitive avalanche stress.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	100V - Maximum blocking voltage for primary-side switching in 48V-input boost stages or 24V-output synchronous rectification.
I_D (V_GS=10V)	11A - Continuous conduction capability at room temperature, derating to 8A at T_C=70°C per thermal limits.
R_DS(ON) (V_GS=10V)	< 140mΩ - Enables ≤15.4W conduction loss at 11A, critical for >95% efficiency in compact power stages.
Q_g (10V)	10–14nC - Low total gate charge reduces driver power demand and enables efficient 500kHz+ switching in DC/DC converters.
t_rr / Q_rr	23ns / 100nC - Fast, predictable body-diode recovery minimizes cross-conduction loss and EMI in synchronous rectifier operation.
R_θJC	3.3°C/W - Allows direct heatsink mounting for high-power density designs; enables 45W dissipation with 150°C ΔT.
E_AS	20mJ - Confirmed single-pulse avalanche energy rating ensures reliable operation under transient overvoltage conditions.

Pinout & Package

Package: TO-252 (DPAK), surface-mount, thermally enhanced with exposed drain pad on bottom side. Pin assignment verified per official AOS datasheet Rev 0 (August 2012), top-view pinout: Gate (left), Drain (center), Source (right).

Pin/Terminal	Circuit Role	Design Meaning
G	Gate control terminal	Receives PWM signal; low input capacitance (C_iss=415pF) and gate resistance (R_g=0.9–2.7Ω) enable clean edge control.
D	Drain connection	High-side switch node or output rectifier anode; electrically tied to exposed copper pad for thermal and current path integrity.
S	Source reference terminal	Return path for load current; connects to PCB ground plane or low-side switch source; defines V_GS reference.

Key Features

Feature	Design Value
100% UIS tested	Guarantees minimum 20mJ avalanche energy handling without parameter shift-critical for flyback and boost converter reliability.
Low R_DS(ON) at 4.5V	R_DS(ON) < 152mΩ enables full-load operation with 5V logic-level drivers, eliminating need for gate boosters in many applications.
Fast body-diode recovery	t_rr = 23ns and Q_rr = 100nC reduce switching loss and voltage overshoot during commutation in synchronous rectification.
Thermally optimized DPAK	R_θJC = 3.3°C/W allows direct heatsinking; R_θJA = 60°C/W on standard 1in² 2oz FR-4 enables board-level thermal management.
Enhanced gate oxide reliability	100% R_g tested and ±20V V_GS rating ensure robustness against gate transients and layout-induced ringing.

Applications

Boost Converter Primary Switch	Synchronous Rectifier
Use Scenario: High-efficiency 12V-to-24V/48V boost stage in LED backlighting and telecom intermediate bus converters. IC Role / Device Role / Timing Role: Main power switch controlling inductor current; driven by fixed-frequency PWM controller with 500kHz–1MHz switching. Use Value: Low R_DS(ON) and Q_g minimize conduction and switching losses; 100V rating accommodates 48V input with margin for line transients.	Use Scenario: Secondary-side synchronous rectification in isolated DC/DC converters for industrial power supplies. IC Role / Device Role / Timing Role: Low-side rectifying switch replacing Schottky diode; driven by gate driver synchronized to primary-side switching. Use Value: Body-diode t_rr/Q_rr specs ensure minimal reverse recovery loss; low V_SD (0.76V) reduces forward drop versus discrete diodes.
Consumer AC-DC Adapter Output Stage	Industrial Motor Drive Half-Bridge Leg
Use Scenario: Output synchronous rectifier in compact 65W USB-C PD adapters targeting high efficiency and low no-load power. IC Role / Device Role / Timing Role: Secondary-side switch operating in discontinuous conduction mode (DCM); driven by self-driven or controller-synchronized gate signal. Use Value: Logic-level V_GS(th) (1.2–2.3V) ensures turn-on with low-voltage secondary winding; TO-252 footprint simplifies layout and thermal relief.	Use Scenario: Low-side switch in half-bridge motor gate driver stage for 24V BLDC fans or pumps in factory automation equipment. IC Role / Device Role / Timing Role: Ground-referenced switching element controlling phase current; operated with dead-time-controlled PWM signals. Use Value: 100% UIS testing ensures resilience to inductive kickback during rapid current reversal; R_θJC supports forced-air cooling in enclosed enclosures.

Boost Converter Primary Switch

Synchronous Rectifier

Use Scenario: High-efficiency 12V-to-24V/48V boost stage in LED backlighting and telecom intermediate bus converters.

IC Role / Device Role / Timing Role: Main power switch controlling inductor current; driven by fixed-frequency PWM controller with 500kHz–1MHz switching.

Use Value: Low R_DS(ON) and Q_g minimize conduction and switching losses; 100V rating accommodates 48V input with margin for line transients.

Use Scenario: Secondary-side synchronous rectification in isolated DC/DC converters for industrial power supplies.

IC Role / Device Role / Timing Role: Low-side rectifying switch replacing Schottky diode; driven by gate driver synchronized to primary-side switching.

Use Value: Body-diode t_rr/Q_rr specs ensure minimal reverse recovery loss; low V_SD (0.76V) reduces forward drop versus discrete diodes.

Consumer AC-DC Adapter Output Stage

Industrial Motor Drive Half-Bridge Leg

Use Scenario: Output synchronous rectifier in compact 65W USB-C PD adapters targeting high efficiency and low no-load power.

IC Role / Device Role / Timing Role: Secondary-side switch operating in discontinuous conduction mode (DCM); driven by self-driven or controller-synchronized gate signal.

Use Value: Logic-level V_GS(th) (1.2–2.3V) ensures turn-on with low-voltage secondary winding; TO-252 footprint simplifies layout and thermal relief.

Use Scenario: Low-side switch in half-bridge motor gate driver stage for 24V BLDC fans or pumps in factory automation equipment.

IC Role / Device Role / Timing Role: Ground-referenced switching element controlling phase current; operated with dead-time-controlled PWM signals.

Use Value: 100% UIS testing ensures resilience to inductive kickback during rapid current reversal; R_θJC supports forced-air cooling in enclosed enclosures.

Equivalent & Alternatives

The following parts are listed as comparable options for similar N-Channel MOSFET applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STP10NK100ZFP	100V/10A, R_DS(ON) = 150mΩ @ 10V, higher Q_g (25nC), TO-220FP package	Larger footprint and higher thermal resistance (R_θJC = 4.5°C/W); less suited for space-constrained SMT designs	Prefer AOD498 for surface-mount, high-density layouts requiring lower gate drive loss and better thermal coupling.
IRF540N	100V/33A, R_DS(ON) = 44mΩ @ 10V, but higher Q_g (71nC), TO-220 package, no UIS rating	Higher current rating but significantly slower switching and no avalanche qualification; unsuitable for hard-switched SMPS	Prefer AOD498 where fast switching, avalanche ruggedness, and compact DPAK are required-especially in boost and sync-rectifier roles.

Compared with STP10NK100ZFP and IRF540N, the AOD498 delivers superior gate-drive efficiency (lower Q_g), validated avalanche robustness, and a thermally optimized surface-mount package-making it the preferred choice for modern high-frequency, high-reliability power conversion designs.

Availability

AOD498 is available at Aetrix Electronics and suitable for boost converters, synchronous rectifiers, and industrial motor drive half-bridge stages requiring stable component supply, consistent parametric performance, and long-term production continuity.

Supply support for AOD498 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 power conversion and management applications.

The AOD498 belongs to AOS's "Advanced Trench" MOSFET product line, engineered specifically for high-efficiency, high-reliability DC/DC conversion in consumer, telecom, and industrial power systems.

FAQ

What is the maximum continuous drain current rating for the AOD498?

The AOD498 is rated for 11A continuous drain current at T_C=25°C with V_GS=10V. This rating decreases to 8A at T_C=70°C due to thermal derating. The device also supports 20A pulsed drain current (I_DM) for short durations, subject to SOA constraints. These values are confirmed in the Absolute Maximum Ratings table of the official AOS datasheet for AOD498.

Does the AOD498 support logic-level gate drive?

Yes, the AOD498 supports logic-level gate drive: its gate threshold voltage (V_GS(th)) ranges from 1.2V to 2.3V, and it delivers R_DS(ON) < 152mΩ at V_GS=4.5V. This enables direct interface with 5V microcontrollers or gate drivers without level-shifting circuitry-verified in the Electrical Characteristics table of the AOD498 datasheet.

Is the AOD498 qualified for automotive applications?

No, the AOD498 is explicitly designed and qualified for the consumer market only. The datasheet states: "THIS PRODUCT HAS BEEN DESIGNED AND QUALIFIED FOR THE CONSUMER MARKET. APPLICATIONS OR USES AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS ARE NOT AUTHORIZED." It does not meet AEC-Q101 or other automotive qualification requirements.

What thermal metrics define the AOD498's power handling capability?

The AOD498 specifies R_θJC = 3.3°C/W (junction-to-case) and R_θJA = 60°C/W (junction-to-ambient on 1in² 2oz FR-4). At T_C=25°C, it supports 45W continuous power dissipation; at T_A=25°C, it supports 2.1W. These values are measured per JEDEC standards and documented in the Thermal Characteristics section of the AOD498 datasheet.

How is the AOD498's avalanche ruggedness validated?

The AOD498 undergoes 100% Unclamped Inductive Switching (UIS) testing per JEDEC JESD24-11. Each unit is verified to withstand a minimum single-pulse avalanche energy of 20mJ (E_AS) at I_AS=8A, with peak junction temperature limited to 175°C. This test is performed using the standardized UIS circuit shown on page 6 of the AOD498 datasheet.

AOD498 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):: 100 V

Current - Continuous Drain (Id) @ 25°C:: 2.5A (Ta), 11A (Tc)

Drive Voltage (Max Rds On, Min Rds On):: 4.5V, 10V

Rds On (Max) @ Id, Vgs:: 140mOhm @ 4.5A, 10V

Vgs(th) (Max) @ Id:: 2.3V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 14 nC @ 10 V

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 415 pF @ 50 V

FET Feature:: -

Power Dissipation (Max):: 2.1W (Ta), 45W (Tc)

Operating Temperature:: -55°C ~ 175°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: TO-252 (DPAK)

AOD498 FAQ

1.How can I place an order for AOD498 through Aetrix?

Please submit a Request for Quotation (RFQ) for AOD498 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 AOD498 reliable?

The price and inventory of AOD498 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOD498 is usually 5 days.

3.What payment methods are accepted for AOD498?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOD498 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AOD498?

AOD498 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AOD498 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 AOD498?

For technical support, including AOD498 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOD498 requirements.

6.How does Aetrix verify that AOD498 is sourced from the original manufacturer or authorized distributors?

All AOD498 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 AOD498 meets industry standards.

7.What is the process for return or replacement of AOD498?

All AOD498 units undergo pre-shipment inspection (PSI). If there is an issue with AOD498, 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 AOD498 part is unused and in its original packaging.

Return procedure for AOD498:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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