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Product Detailed Parameters
- Description：MOSFET P-CH 30V 4A 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)：30 V
- Current - Continuous Drain (Id) @ 25°C：4A (Ta)
- Drive Voltage (Max Rds On, Min Rds On)：2.5V, 10V
- Rds On (Max) @ Id, Vgs：50mOhm @ 4A, 10V
- Vgs(th) (Max) @ Id：1.3V @ 250µA
- Gate Charge (Qg) (Max) @ Vgs：20 nC @ 10 V
- Vgs (Max)：±12V
- Input Capacitance (Ciss) (Max) @ Vds：645 pF @ 15 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 AO3481 is a P-Channel Power MOSFET manufactured by Alpha & Omega Semiconductor. It utilizes advanced trench technology to achieve low on-resistance and high current capability. The device is rated for a drain-source voltage of -30V and supports continuous drain currents up to -5.8A. Key electrical parameters include a maximum gate-source voltage of ±20V, a threshold voltage range typically between -0.6V and -2.5V, and an on-resistance (RDS(on)) of approximately 0.035Ω at VGS = -10V. The component operates within a junction temperature range of -55°C to +150°C and is housed in a surface-mount SOT-23 package.
Feature Summary
- Advanced trench gate technology for optimized performance
- Low on-resistance for efficient power handling
- High current capability suitable for load switching
- RoHS compliant and halogen-free construction
Applications
- Notebook AC-in load switching
- Battery protection circuits for charge and discharge management
- General purpose load switches in portable electronics
Procurement Notes
Verify the specific datasheet revision and ordering suffix when sourcing, as packaging options may vary. Confirm that the component meets RoHS and halogen-free requirements if mandated by your design specifications. Ensure compatibility with standard SOT-23 footprint dimensions during PCB layout. Cross-reference part numbers carefully to distinguish between similar AOS P-channel devices with different current or resistance ratings.
Selection Notes
Select this component for applications requiring compact P-channel switching with moderate current demands. The SOT-23 package limits thermal dissipation compared to larger packages, so ensure adequate board copper area for heat spreading. Verify that the required gate drive voltage aligns with the specified RDS(on) conditions to maintain optimal efficiency. Consider the threshold voltage variations when designing logic-level control interfaces.
Part Context
Alpha & Omega Semiconductor specializes in power management solutions, including MOSFETs and ICs. The AO3481 belongs to their portfolio of trench technology MOSFETs designed for consumer and industrial applications. This series emphasizes low on-resistance and high current density within small form factors, catering to the needs of portable and battery-powered devices.
Replacement Considerations
Potential substitutes include other 30V P-Channel MOSFETs in SOT-23 packages such as the AO3401A or AO3407A from Alpha & Omega, or equivalent parts from manufacturers like Taiwan Semiconductor. Verify that any replacement matches the critical parameters of -30V VDS, comparable RDS(on), and identical pinout configuration.
