AO3438

$0.06

Description：MOSFET N-CH 20V 3A SOT23-3L
Series：-
Mfr：Alpha & Omega Semiconductor Inc.
Package：Tape & Reel (TR)

SKU:b384065aebce Category: Single FETs, MOSFETs Brand: Alpha & Omega Semiconductor Inc.

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Product introduction

Product Detailed Parameters

Description：MOSFET N-CH 20V 3A SOT23-3L
Series：-
Mfr：Alpha & Omega Semiconductor Inc.
Package：Tape & Reel (TR)
FET Type：N-Channel
Technology：MOSFET (Metal Oxide)
Drain to Source Voltage (Vdss)：20 V
Current - Continuous Drain (Id) @ 25°C：3A (Ta)
Drive Voltage (Max Rds On, Min Rds On)：1.8V, 4.5V
Rds On (Max) @ Id, Vgs：62mOhm @ 3A, 4.5V
Vgs(th) (Max) @ Id：1V @ 250µA
Gate Charge (Qg) (Max) @ Vgs：3.8 nC @ 4.5 V
Vgs (Max)：±8V
Input Capacitance (Ciss) (Max) @ Vds：320 pF @ 10 V
FET Feature：-
Power Dissipation (Max)：1.4W (Ta)
Operating Temperature：-55°C ~ 150°C (TJ)
Grade：-
Qualification：-
Mounting Type：Surface Mount
Supplier Device Package：SOT-23-3
Package / Case：3-SMD, SOT-23-3 Variant

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AO3438

Overview

The AO3438 is an N-channel enhancement mode MOSFET manufactured by Alpha & Omega Semiconductor Inc. It utilizes advanced trench technology to deliver low on-resistance and gate charge. The device features a drain-source voltage (Vdss) of 20V and a continuous drain current (Id) of 3A at ambient temperature. It operates with logic-level gate drive voltages as low as 1.8V. The component is housed in a surface-mount SOT-23-3 package, suitable for portable applications requiring efficient power switching.

Feature Summary

Advanced trench technology for excellent RDS(ON) performance
Logic level gate operation compatible with 1.8V drive signals
Low gate charge for improved switching efficiency

Applications

Portable battery-powered devices
Power management circuits
Load switches

Procurement Notes

Verify the specific datasheet revision and RoHS compliance status directly with Alpha & Omega Semiconductor Inc. or authorized distributors before procurement. Confirm that the SOT-23-3 package dimensions match your PCB footprint requirements. Ensure the operating temperature range aligns with your system's thermal design constraints.

Selection Notes

Select the AO3438 when a compact N-channel MOSFET with 20V rating and 3A current capacity is required. Its logic-level gate threshold makes it suitable for low-voltage control systems. Consider the SOT-23-3 package size for space-constrained designs. Evaluate thermal dissipation needs based on the 1.4W power dissipation rating at ambient temperature.

Part Context

The AO3438 belongs to the Alpha & Omega Semiconductor N-channel MOSFET family designed for general-purpose switching applications. It is part of their portfolio utilizing trench FET technology to optimize the balance between conduction losses and switching speeds. The SOT-23-3 packaging allows for high-density board layouts common in modern consumer electronics.

Replacement Considerations

Consult official substitution guides from Alpha & Omega Semiconductor Inc. for verified equivalents. Ensure any replacement maintains the 20V Vdss, 3A Id, and SOT-23-3 package compatibility. Verify that gate charge and RDS(ON) specifications meet or exceed original requirements.