## UT6401L-AG6-R: Technical Overview The **UT6401L-AG6-R** is a P-Channel enhancement mode Field Effect Transistor (MOSFET) manufactured by UTC (Unisonic Technologies). It is designed for low-voltage, high-speed switching applications. --- ### 1. Key Technical Specifications | Parameter | Symbol | Maximum Rating | | :--- | :--- | :--- | | **Drain-Source Voltage** | $V_{DSS}$ | -30 V | | **Gate-Source Voltage** | $V_{GSS}$ | ±12 V | | **Continuous Drain Current** | $I_D$ | -4.2 A | | **Pulsed Drain Current** | $I_{DM}$ | -30 A | | **Power Dissipation** | $P_D$ | 1.1 W | | **Operating Temperature** | $T_J$ | -55 to +150 °C | --- ### 2. Physical and Packaging Details The suffix and part name provide specific information about the physical build: * **Package Type:** SOT-26 (also known as TSOP-6). This is a small, surface-mount package suitable for space-constrained designs. * **RoHS Status:** The "R" usually indicates compliance with environmental standards (Tape & Reel packaging, Lead-free/Halogen-free). * **Pin Configuration:** It typically features a standard P-Channel pinout for SOT-26, allowing for easy integration into DC-DC converter layouts. --- ### 3. Electrical Characteristics (Typical @ 25°C) The efficiency of this MOSFET is defined by its resistance and threshold: * **Static Drain-Source On-Resistance ($R_{DS(ON)}$):** * 65 mΩ (Typ.) @ $V_{GS}$ = -10V * 105 mΩ (Typ.) @ $V_{GS}$ = -4.5V * **Gate Threshold Voltage ($V_{GS(th)}$):** -0.7V to -1.3V (Logic level sensitive). * **Switching Speed:** Known for low gate charge ($Q_G$), enabling fast switching frequencies with minimal power loss. --- ### 4. Common Applications Due to its P-Channel nature and low on-resistance, the UT6401L is frequently used in: 1. **Load Switches:** Power management in portable devices (tablets, smartphones). 2. **Battery Protection:** Disconnecting the battery circuit during over-discharge or fault conditions. 3. **DC-DC Converters:** High-side switching in buck or boost regulators. 4. **Inverters:** Used in low-voltage motor control or LED driving circuits. ---