The **UT4411G-S08-R** is a high-performance **P-Channel Enhancement Mode Field Effect Transistor (MOSFET)**. It is widely used in power management applications due to its low on-state resistance and efficient switching capabilities. --- ### 1. Key Technical Specifications The following table summarizes the primary electrical characteristics of the UT4411G-S08-R: | Parameter | Symbol | Maximum Rating | | :--- | :--- | :--- | | **Drain-Source Voltage** | $V_{DSS}$ | -30 V | | **Gate-Source Voltage** | $V_{GSS}$ | ±20 V | | **Continuous Drain Current** | $I_D$ | -8.0 A | | **Pulsed Drain Current** | $I_{DM}$ | -40 A | | **Static Drain-Source On-Resistance** | $R_{DS(ON)}$ | 32 mΩ (typ.) @ $V_{GS}=-10V$ | | **Total Gate Charge** | $Q_g$ | 21 nC (typ.) | | **Package Type** | SOP-8 | Surface Mount | --- ### 2. Part Number Breakdown Understanding the suffix and prefix of the part number helps in identifying the specific variant: * **UT4411**: The core model number (P-Channel MOSFET). * **G**: Denotes "Halogen Free" and RoHS compliance. * **S08**: Refers to the **SOP-8** (Small Outline Package) with 8 pins. * **R**: Indicates the packaging method, typically **Tape & Reel**. --- ### 3. Pin Configuration (SOP-8) In a standard SOP-8 package for this MOSFET, the pins are generally assigned as follows: 1. **Pins 1, 2, 3**: Source (S) 2. **Pin 4**: Gate (G) 3. **Pins 5, 6, 7, 8**: Drain (D) *Note: Connecting multiple pins for Source and Drain helps in heat dissipation and reduces parasitic resistance.* --- ### 4. Features and Applications #### Features * **Low $R_{DS(ON)}$**: Minimizes conduction losses, increasing efficiency in battery-powered devices. * **Fast Switching**: High-speed capability suitable for PWM applications. * **Green Product**: Lead-free and halogen-free construction. #### Common Applications * **Load Switching**: Used to turn power rails on/off in laptops and tablets. * **Battery Protection**: Ideal for Li-ion battery management systems (BMS). * **DC-DC Converters**: Used in the buck/boost stages of power supplies. * **Inverters**: Power stage for small motor drives or CCFL inverters. --- ### 5. Circuit Symbol ```text Drain (D) | +----+----+ | | | --+-- | --+-- --+-- | --+-- (P-Channel Internal Diode) | | | +----|<---+ | Source (S) | Gate (G) ```