The **UT2305L-AE3-R** is a Power MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) commonly used in power management and switching applications. Below is a detailed technical breakdown of its specifications and characteristics. --- ### 1. General Overview The UT2305L is a **P-Channel logic-level MOSFET** designed for high-density mounting. It is characterized by low on-state resistance and the ability to handle significant current relative to its small package size. | Parameter | Specification | | :--- | :--- | | **Channel Type** | P-Channel | | **Package Type** | SOT-23 | | **Configuration** | Single | | **Lead Plating** | Halogen-free / RoHS Compliant | --- ### 2. Key Electrical Specifications These values represent the typical performance limits for the device: | Characteristic | Symbol | Typical Value | | :--- | :--- | :--- | | **Drain-Source Voltage** | $V_{DSS}$ | -30V | | **Gate-Source Voltage** | $V_{GSS}$ | ±12V | | **Continuous Drain Current** | $I_D$ | -3.5A to -4.2A (depending on $V_{GS}$) | | **Static Drain-Source On-Resistance** | $R_{DS(ON)}$ | ~55mΩ @ $V_{GS} = -10V$ | | **Static Drain-Source On-Resistance** | $R_{DS(ON)}$ | ~95mΩ @ $V_{GS} = -4.5V$ | | **Total Gate Charge** | $Q_g$ | 5.5 nC | --- ### 3. Pin Configuration (SOT-23) The device follows the standard SOT-23 pinout for MOSFETs: 1. **Gate (G):** Controls the biasing of the transistor. 2. **Source (S):** The terminal where current enters (for P-channel, usually connected to the positive supply). 3. **Drain (D):** The terminal where current leaves to the load. --- ### 4. Applications Due to its small footprint and low threshold voltage, it is ideal for: * **Load Switching:** Turning power rails on and off in portable electronics. * **Battery Management:** Protection circuits and charging paths in Li-ion battery packs. * **DC-DC Converters:** Used in the switching stage of buck or boost converters. * **LED Drivers:** Small scale lighting control. --- ### 5. Part Number Breakdown: `UT2305L-AE3-R` * **UT2305**: Model/Series number. * **L**: Lead-free/Halogen-free. * **AE3**: Package code for SOT-23. * **R**: Tape and Reel packaging. ---