The **UT4413L-S08-R** is a specific P-Channel enhancement mode Field Effect Transistor (MOSFET). It is manufactured by Unisonic Technologies Co., Ltd (UTC) and is widely used for power management and switching applications. --- ## 1. Technical Specifications The following table summarizes the key electrical characteristics of the UT4413L: | Parameter | Symbol | Typical Rating | | :--- | :--- | :--- | | **Drain-Source Voltage** | $V_{DSS}$ | -30 V | | **Gate-Source Voltage** | $V_{GSS}$ | ±20 V | | **Continuous Drain Current** | $I_D$ | -15 A | | **Drain-Source On-Resistance** | $R_{DS(ON)}$ | 8.5 mΩ (at $V_{GS}$ = -10V) | | **Package Type** | SOP-8 | Surface Mount | | **Total Gate Charge** | $Q_g$ | 42 nC | --- ## 2. Part Number Breakdown Understanding the nomenclature helps identify the physical and electrical properties: * **UT**: UTC (Unisonic Technologies) Manufacturer prefix. * **4413**: Part Series (P-Channel MOSFET). * **L**: Lead-free / RoHS compliant. * **S08**: SOP-8 Package (Small Outline Package with 8 pins). * **R**: Tape & Reel packaging for automated assembly. --- ## 3. Key Features * **Low On-Resistance:** The low $R_{DS(ON)}$ minimizes power dissipation during the "ON" state, increasing efficiency. * **High Switching Speed:** Capable of high-frequency operation. * **P-Channel Logic:** Simplifies high-side switching circuits as it does not require a charge pump to drive the gate. * **SOP-8 Footprint:** Compact design suitable for high-density PCB layouts. --- ## 4. Typical Applications The UT4413L-S08-R is commonly found in the following circuits: 1. **Power Management:** Used in battery protection circuits for laptops and mobile devices. 2. **Load Switching:** Serving as a high-side switch to connect/disconnect power to peripheral components. 3. **DC-DC Converters:** Integrated into buck or boost converters for voltage regulation. 4. **Inverters:** Used in backlight inverters for LCD monitors. --- ## 5. Pin Configuration (SOP-8) In a standard SOP-8 P-Channel MOSFET, the pins are usually assigned as follows: | Pin Number | Function | | :--- | :--- | | 1, 2, 3 | **Source (S)** | | 4 | **Gate (G)** | | 5, 6, 7, 8 | **Drain (D)** |