The **UT9435-S08-R** is a P-Channel enhancement mode Power MOSFET designed by Unisonic Technologies (UTC). It is primarily used in power management applications where low on-state resistance and high-speed switching are required. --- ### 1. Key Technical Specifications Below are the primary electrical characteristics of the UT9435-S08-R: | Parameter | Symbol | Maximum Rating | | :--- | :--- | :--- | | **Drain-Source Voltage** | $V_{DSS}$ | -30 V | | **Gate-Source Voltage** | $V_{GSS}$ | ±20 V | | **Continuous Drain Current** | $I_D$ | -5.3 A | | **Static Drain-Source On-Resistance** | $R_{DS(ON)}$ | 50 mΩ (at $V_{GS}$ = -10V) | | **Total Gate Charge** | $Q_g$ | 15 nC (typical) | | **Package Type** | SOP-8 | Surface Mount | --- ### 2. Physical Structure and Pinout The UT9435-S08-R comes in an **SOP-8** (Small Outline Package). The internal configuration is a single P-channel MOSFET. * **SOP-8 Pin Mapping:** * Pins 1, 2, 3: **Source (S)** * Pin 4: **Gate (G)** * Pins 5, 6, 7, 8: **Drain (D)** --- ### 3. Functional Features * **Low $R_{DS(ON)}$:** This reduces power dissipation during the "ON" state, increasing efficiency in battery-powered devices. * **High Density Cell Design:** UTC uses high-density cell technology to ensure reliability and high power density. * **Logic Level Compatibility:** It can be driven directly by logic-level voltages (e.g., from a microcontroller or PWM IC), making it versatile for digital control. --- ### 4. Typical Applications The device is commonly found in circuits requiring a "High-Side" switch: 1. **Power Management:** DC-DC converters and power distribution units. 2. **Battery Protection:** Integrated into Li-ion battery protection circuits. 3. **Load Switching:** Used to turn on/off peripheral components in laptops and mobile devices. 4. **Motor Control:** Small DC motor drivers and H-bridge configurations. --- ### 5. Part Number Nomenclature The suffix **-S08-R** provides information about the packaging: * **S08**: Indicates the SOP-8 package style. * **R**: Indicates "Tape and Reel" packaging (standard for automated SMT assembly).