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Product Detailed Parameters
- Description：MOSFET P-CH 20V 3.5A SOT23-3
- Series：-
- Mfr：Alpha & Omega Semiconductor Inc.
- Package：Tape & Reel (TR)
- FET Type：P-Channel
- Technology：MOSFET (Metal Oxide)
- Drain to Source Voltage (Vdss)：20 V
- Current - Continuous Drain (Id) @ 25°C：3.5A (Ta)
- Drive Voltage (Max Rds On, Min Rds On)：1.8V, 10V
- Rds On (Max) @ Id, Vgs：85mOhm @ 3.5A, 10V
- Vgs(th) (Max) @ Id：1.2V @ 250µA
- Gate Charge (Qg) (Max) @ Vgs：10 nC @ 4.5 V
- Vgs (Max)：±12V
- Input Capacitance (Ciss) (Max) @ Vds：325 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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Overview
The AO3499 is a P-Channel Enhancement Mode MOSFET manufactured by Alpha & Omega Semiconductor. It features a 20V drain-source voltage rating and a continuous drain current of 3.5A at ambient temperature. The device is housed in an SOT-23-3 surface-mount package, offering a thermal resistance of 1.4W (Ta). Key electrical specifications include a maximum gate-source voltage of ±12V and a threshold voltage of 1.2V at 250µA. This component utilizes advanced trench technology for efficient power management.
Feature Summary
- P-Channel enhancement mode construction for high-side switching applications
- Advanced trench technology design for low on-resistance and fast switching
- Surface-mount SOT-23-3 package optimized for space-constrained PCB layouts
Applications
- Load switching circuits
- Battery protection systems
- Motor driver interfaces
Procurement Notes
Verify the specific datasheet revision and ordering suffix to ensure compatibility with your design requirements. Confirm that the SOT-23-3 package dimensions match your footprint. Check for any RoHS or REACH compliance documentation required for your region. Ensure the operating temperature range aligns with your system's environmental conditions before finalizing procurement.
Selection Notes
Select this component when a compact P-Channel MOSFET is needed for low-voltage, moderate-current applications. The 20V rating suits single-cell battery systems. Consider the 3.5A current limit and thermal performance in the SOT-23-3 package. Verify gate drive levels are compatible with the 1.2V threshold voltage for reliable turn-on.
Part Context
Alpha & Omega Semiconductor produces a broad portfolio of power semiconductors using advanced 200mm and 300mm wafer processes. The AO3499 belongs to their single FET and MOSFET category, designed for robustness in consumer electronics and industrial control. The company focuses on delivering high-efficiency solutions for power management and signal switching.
Replacement Considerations
Publicly confirmed substitute part numbers for the AO3499 were not found in the provided source material. Engineers should consult official manufacturer cross-reference lists or equivalent parameter tables from other vendors to identify suitable alternatives.
