The **UT3403L-AE2-R** is a high-performance, P-Channel enhancement mode Field Effect Transistor (MOSFET) designed by Unisonic Technologies (UTC). It is widely used in power management applications due to its low on-state resistance and high efficiency. --- ## 1. Technical Specifications The following table highlights the primary electrical characteristics of the UT3403L-AE2-R: | Parameter | Symbol | Value | Unit | |:---|:---:|:---:|:---:| | **Drain-Source Voltage** | $V_{DSS}$ | -30 | V | | **Gate-Source Voltage** | $V_{GSS}$ | ±12 | V | | **Continuous Drain Current** | $I_D$ | -2.6 | A | | **Pulsed Drain Current** | $I_{DM}$ | -10 | A | | **On-State Resistance** ($V_{GS}=-10V$) | $R_{DS(ON)}$ | 115 (Max) | mΩ | | **Total Gate Charge** | $Q_g$ | 5.5 | nC | | **Package Type** | SOT-23-3L | --- | --- | --- ## 2. Key Features The device is engineered for low-voltage, high-speed switching applications. Key features include: * **Low $R_{DS(ON)}$:** Minimizes conduction losses, making it ideal for battery-powered devices. * **Low Threshold Voltage:** Operates efficiently even with low logic-level gate drives. * **Fast Switching Speed:** Reduces switching losses in DC-DC converters. * **Halogen-Free:** The "L" in the part number signifies it is Lead-free and Halogen-free, meeting RoHS compliance. * **Trench Technology:** Utilizes advanced trench cell design to achieve high cell density. --- ## 3. Pin Configuration The **SOT-23-3L** package (designated by AE2 in the part number) has the following pinout: 1. **Gate (G):** Controls the biasing of the MOSFET. 2. **Source (S):** The source terminal of the P-channel. 3. **Drain (D):** The output terminal where the load is typically connected. --- ## 4. Typical Applications The UT3403L is commonly found in the following circuits: * **Load Switching:** Turning power rails on/off in mobile devices. * **Power Management:** Used in laptop and tablet motherboards. * **Battery Protection:** Protecting lithium-ion batteries from over-discharge. * **DC-DC Converters:** Serving as the high-side switch in buck converters. ---