The **PX3511ADAG-R3** is a high-speed synchronous MOSFET driver manufactured by Infineon Technologies (formerly International Rectifier). It is primarily designed to drive the high-side and low-side N-channel MOSFETs in a synchronous rectified buck converter topology. --- ### 1. Key Technical Specifications | Feature | Specification | | :--- | :--- | | **Manufacturer** | Infineon Technologies | | **Type** | Synchronous MOSFET Driver | | **Input Voltage (VCC)** | 5V Typical | | **Output Channels** | 2 (High-Side and Low-Side) | | **Propagation Delay** | ~20ns - 30ns | | **Package Type** | DFN-10 (Lead-free, RoHS compliant) | | **Temperature Range** | -40°C to +125°C | --- ### 2. Core Functional Components The PX3511 series is engineered for high efficiency in VRM (Voltage Regulator Module) applications. Below are its primary electronic characteristics: * **Adaptive Dead-Time Control:** To prevent "shoot-through" (where both MOSFETs are on simultaneously, causing a short circuit), the chip monitors the gate voltages and ensures one switch is completely off before the other turns on. * **PWM Input Logic:** It accepts a single PWM signal from a controller and internally generates the complementary signals for the high-side and low-side gates. * **Internal Bootstrap Diode:** It often features an integrated bootstrap circuit, reducing the need for external components to provide the high-side gate drive voltage. * **Tri-State PWM Support:** The driver can recognize a "High-Z" or floating state on the PWM input, allowing it to enter a low-power mode or shut down both outputs simultaneously. --- ### 3. Application Use Cases This component is typically found in high-performance power management circuits: 1. **CPU/GPU Power Supplies:** Used in multi-phase buck converters on motherboards and graphics cards. 2. **Point-of-Load (POL) Converters:** For localized DC-DC conversion in telecommunication equipment. 3. **High-Current Modules:** Systems requiring fast switching frequencies (up to 2MHz) to minimize inductor size. --- ### 4. Typical Connection Diagram (Logical) ```mermaid graph LR PWM_Controller -->|PWM Signal| PX3511 VCC_5V --> PX3511 PX3511 -->|Gate High| HS_MOSFET PX3511 -->|Gate Low| LS_MOSFET HS_MOSFET --> Phase_Node LS_MOSFET --> Phase_Node Phase_Node --> Output_Inductor ``` ---