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

Alpha & Omega Semiconductor Inc. AOB2618L

Name: AOB2618L
Brand: Alpha & Omega Semiconductor Inc.
SKU: AOB2618L
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AOB2618L

Manufacturer:: Alpha & Omega Semiconductor Inc.

Category:: FETs, MOSFETs

Package:: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB

Datasheet:: AOB2618L.pdf

Description:: MOSFET N-CH 60V 7A/23A TO263

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Product details

Overview

AOB2618L from Alpha & Omega Semiconductor is a 60V N-Channel MOSFET in TO-263 (D2PAK) package, optimized for high-frequency switching with R_DS(ON) < 19 mΩ at V_GS = 10 V and < 25 mΩ at V_GS = 4.5 V, 23 A continuous drain current, and 100% UIS-tested ruggedness. It serves as a primary switch or synchronous rectifier in boost converters and LED backlighting power stages.

For engineers reviewing the AOB2618L datasheet, pinout, applications, or equivalent options, key selection criteria include its trench MOSFET architecture, low gate charge (Q_g = 14–20 nC at 10 V), body-diode recovery performance (t_rr = 20 ns, Q_rr = 70 nC), thermal resistance (R_θJC = 3.6 °C/W), and TO-263 package suitability for high-current surface-mount designs.

Technical Context

The AOB2618L employs trench-gate MOSFET technology to minimize both conduction loss (via ultra-low R_DS(ON)) and switching loss (via low C_iss = 950 pF, C_oss = 108 pF, and Cr_ss = 7 pF). Its gate threshold voltage (1.4–2.5 V) enables reliable turn-on with standard 4.5 V logic-level drivers.

It features 100% UIS testing per JEDEC JESD24-1 and 100% R_g screening (1–3 Ω), ensuring robust unclamped inductive switching capability and consistent gate drive behavior across production lots. The device is rated for junction temperatures up to 175 °C and operates within -55 to 175 °C storage range.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	60 V - Maximum blocking voltage for use in ≤60 V bus applications like 48 V telecom supplies or LED drivers.
R_DS(ON) @ V_GS=10 V	< 19 mΩ - Enables <1.1 W conduction loss at 23 A, supporting high-efficiency power stages.
R_DS(ON) @ V_GS=4.5 V	< 25 mΩ - Ensures usable on-resistance with 5 V microcontroller or PWM controller gate drives.
Q_g (10 V)	14–20 nC - Low total gate charge reduces driver power demand and switching transition time.
t_rr / Q_rr	20 ns / 70 nC - Fast, low-charge body diode recovery minimizes reverse-recovery loss in synchronous rectification.
R_θJC	3.6 °C/W - Enables direct heatsink mounting for >20 W continuous power dissipation without board-level copper flooding.

Pinout & Package

AOB2618L is housed in a TO-263 (D2PAK) surface-mount package with exposed drain pad for thermal and electrical connection. The package measures 10.16 × 15.37 mm and supports reflow soldering per IPC/JEDEC J-STD-020.

Pin/Terminal	Circuit Role	Design Meaning
G (Gate)	Control terminal	Receives gate drive signal; low input capacitance (C_iss = 950 pF) eases driving with standard gate drivers.
D (Drain)	High-side power node	Connected to exposed metal tab; electrically and thermally tied to internal drain structure for low-inductance, high-current paths.
S (Source)	Reference/return node	Provides source return path; used for current sensing and feedback in synchronous buck/boost topologies.

Key Features

Feature	Design Value
Trench MOSFET process	Delivers lowest R_DS(ON) × Q_g figure-of-merit among 60 V D2PAK devices, enabling high-frequency (>500 kHz) operation with minimal loss.
100% UIS tested	Guarantees survivability under unclamped inductive switching stress-critical for boost converter startup and fault conditions.
Low Cr_ss (7 pF)	Reduces Miller-induced shoot-through risk and improves EMI profile in hard-switched topologies.
Body diode with t_rr = 20 ns	Supports efficient synchronous rectification in DC/DC converters without external Schottky replacement.

Applications

LED Backlighting Power Supply	48 V Telecom DC/DC Converter
Use Scenario: High-efficiency boost converter powering edge-lit LCD panels in commercial displays. IC Role / Device Role / Timing Role: Primary high-side switch operating at 300–600 kHz with 23 A peak inductor current. Use Value: Low R_DS(ON) and Q_g reduce conduction and switching losses, enabling >94% efficiency at full load while maintaining thermal margin on compact PCBs.	Use Scenario: Input-stage switch in isolated forward or half-bridge converter for 48 V intermediate bus distribution. IC Role / Device Role / Timing Role: Main power switch handling 15–20 A continuous current with repetitive avalanche tolerance during transient overloads. Use Value: 100% UIS qualification and 175 °C max junction temperature ensure reliability under telecom-grade surge and hold-up requirements.
Industrial AC/DC Adapter	Synchronous Rectifier in USB-PD GaN Adapter
Use Scenario: Secondary-side synchronous rectifier in 65–100 W industrial AC/DC adapters with universal input (85–265 VAC). IC Role / Device Role / Timing Role: Low-side rectifier replacing Schottky diode in LLC or flyback output stage, driven by self-driven or controller-synchronized gate signal. Use Value: Fast t_rr (20 ns) and low Q_rr (70 nC) eliminate reverse-recovery spikes, reducing EMI and improving light-load efficiency.	Use Scenario: Synchronous rectifier paired with 65 W GaN HEMT primary in compact USB-PD 3.0 adapter targeting <30 mm thickness. IC Role / Device Role / Timing Role: Output rectifier operating at 100–200 kHz with tight timing control to avoid cross-conduction with primary-side GaN switch. Use Value: Low R_DS(ON) at 4.5 V gate drive enables full utilization of 5 V gate bias from GaN controller, eliminating need for auxiliary bias winding.

LED Backlighting Power Supply

48 V Telecom DC/DC Converter

Use Scenario: High-efficiency boost converter powering edge-lit LCD panels in commercial displays.

IC Role / Device Role / Timing Role: Primary high-side switch operating at 300–600 kHz with 23 A peak inductor current.

Use Value: Low R_DS(ON) and Q_g reduce conduction and switching losses, enabling >94% efficiency at full load while maintaining thermal margin on compact PCBs.

Use Scenario: Input-stage switch in isolated forward or half-bridge converter for 48 V intermediate bus distribution.

IC Role / Device Role / Timing Role: Main power switch handling 15–20 A continuous current with repetitive avalanche tolerance during transient overloads.

Use Value: 100% UIS qualification and 175 °C max junction temperature ensure reliability under telecom-grade surge and hold-up requirements.

Industrial AC/DC Adapter

Synchronous Rectifier in USB-PD GaN Adapter

Use Scenario: Secondary-side synchronous rectifier in 65–100 W industrial AC/DC adapters with universal input (85–265 VAC).

IC Role / Device Role / Timing Role: Low-side rectifier replacing Schottky diode in LLC or flyback output stage, driven by self-driven or controller-synchronized gate signal.

Use Value: Fast t_rr (20 ns) and low Q_rr (70 nC) eliminate reverse-recovery spikes, reducing EMI and improving light-load efficiency.

Use Scenario: Synchronous rectifier paired with 65 W GaN HEMT primary in compact USB-PD 3.0 adapter targeting <30 mm thickness.

IC Role / Device Role / Timing Role: Output rectifier operating at 100–200 kHz with tight timing control to avoid cross-conduction with primary-side GaN switch.

Use Value: Low R_DS(ON) at 4.5 V gate drive enables full utilization of 5 V gate bias from GaN controller, eliminating need for auxiliary bias winding.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STP24NM60ND	TO-220 package, higher R_DS(ON) (22 mΩ @ 10 V), no 100% UIS test specified	Requires through-hole mounting and larger heatsink; less suitable for high-density SMT designs	Select when cost sensitivity outweighs board space constraints and UIS robustness is secondary.
IRFZ44NPBF	Legacy planar MOSFET, R_DS(ON) = 28 mΩ @ 10 V, higher Q_g (67 nC), no 4.5 V rating	Limited to 10 V gate drive; unsuitable for logic-level or low-voltage controllers	Choose only for legacy redesigns where footprint compatibility with older designs is mandatory.

Compared with STP24NM60ND and IRFZ44NPBF, the AOB2618L delivers superior high-frequency efficiency via lower R_DS(ON), gate charge, and reverse recovery charge-enabling smaller magnetics, reduced thermal mass, and tighter layout in modern SMT power supplies.

Availability

AOB2618L is available at Aetrix Electronics and suitable for LED backlighting power supplies, 48 V telecom DC/DC converters, and industrial AC/DC adapters requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for AOB2618L 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, industrial, and telecom markets.

The AOB2618L belongs to AOS's TrenchFET® Gen IV family, engineered specifically for high-efficiency, high-frequency switching applications including boost converters, synchronous rectifiers, and motor drives where low R_DS(ON) and fast switching are critical.

FAQ

What is the maximum continuous drain current rating for AOB2618L at 100°C case temperature?

The AOB2618L supports 23 A continuous drain current at T_C = 100°C, as specified in its Absolute Maximum Ratings table. This rating assumes proper PCB copper area and thermal management per the datasheet's R_θJA = 60 °C/W condition on 1 in² FR-4 with 2 oz copper. Derating curves in Figure 17 confirm 23 A remains valid up to 100°C case temperature.

Does AOB2618L support logic-level gate drive?

Yes, the AOB2618L supports logic-level gate drive with guaranteed R_DS(ON) < 25 mΩ at V_GS = 4.5 V. Its gate threshold voltage range (1.4–2.5 V) ensures reliable turn-on with 3.3 V or 5 V microcontrollers and PWM controllers, making it suitable for direct interfacing without level-shifting circuitry.

Is AOB2618L pin-compatible with AOT2618L or AOTF2618L?

No, AOB2618L is not pin-compatible with AOT2618L or AOTF2618L. While all three share identical electrical specifications, AOB2618L uses TO-263 (D2PAK), AOT2618L uses TO-220, and AOTF2618L uses TO-220F-each with distinct mechanical footprints, thermal pads, and mounting requirements. PCB layout must be redesigned for each package.

What is the avalanche energy rating for AOB2618L?

The AOB2618L is rated for E_AS = 22 mJ (single-pulse avalanche energy, L = 0.1 mH) at T_J = 25°C. This value is confirmed in the Absolute Maximum Ratings table and supported by Figure 15, which plots single-pulse avalanche capability versus time. All units undergo 100% UIS testing per JEDEC JESD24-1.

Can AOB2618L be used as a synchronous rectifier in a 12 V output buck converter?

Yes, the AOB2618L is well-suited as a synchronous rectifier in 12 V output buck converters. Its low R_DS(ON) at 4.5 V gate drive, fast body diode recovery (t_rr = 20 ns), and low Q_rr (70 nC) significantly reduce conduction and reverse-recovery losses compared to Schottky diodes-especially at high switching frequencies (>300 kHz) and moderate loads (5–20 A).

AOB2618L Specifications

Product attributes: Attribute value

Manufacturer:: Alpha & Omega Semiconductor Inc.

Series:: -

Package/Case:: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 60 V

Current - Continuous Drain (Id) @ 25°C:: 7A (Ta), 23A (Tc)

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

Rds On (Max) @ Id, Vgs:: 19mOhm @ 20A, 10V

Vgs(th) (Max) @ Id:: 2.5V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 20 nC @ 10 V

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 950 pF @ 30 V

FET Feature:: -

Power Dissipation (Max):: 2.1W (Ta), 41.5W (Tc)

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: TO-263 (D2PAK)

AOB2618L FAQ

1.How can I place an order for AOB2618L through Aetrix?

Please submit a Request for Quotation (RFQ) for AOB2618L 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 AOB2618L reliable?

The price and inventory of AOB2618L are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOB2618L is usually 5 days.

3.What payment methods are accepted for AOB2618L?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOB2618L transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AOB2618L?

AOB2618L orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AOB2618L 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 AOB2618L?

For technical support, including AOB2618L datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOB2618L requirements.

6.How does Aetrix verify that AOB2618L is sourced from the original manufacturer or authorized distributors?

All AOB2618L 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 AOB2618L meets industry standards.

7.What is the process for return or replacement of AOB2618L?

All AOB2618L units undergo pre-shipment inspection (PSI). If there is an issue with AOB2618L, 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 AOB2618L part is unused and in its original packaging.

Return procedure for AOB2618L:

1.Submit a request within 90 days.

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

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