## ADP3416: High-Voltage Dual MOSFET Driver The **ADP3416** is a specialized electronic component designed to drive the gates of two N-channel power MOSFETs in a synchronous buck converter topology. It is commonly used in CPU power supplies (VRMs) to translate low-voltage PWM signals from a controller into high-current gate drives for high-power switching. --- ### Key Specifications and Characteristics | Feature | Specification | | :--- | :--- | | **Type** | Dual MOSFET Driver (High-side & Low-side) | | **Supply Voltage (VCC)** | 4.6V to 6V | | **High-Side Supply (BST)** | Up to 30V (referenced to ground) | | **Input Logic** | TTL/CMOS Compatible PWM | | **Output Drive Current** | ~1A to 2A (Peak) | | **Transition Time** | ~20ns Rise/Fall times | --- ### Core Internal Functions 1. **Adaptive Dead-Time Control:** The chip monitors the gate voltages of both the upper and lower MOSFETs. It ensures that one MOSFET is completely off before the other turns on. This prevents "shoot-through" (a short circuit between the input voltage and ground). 2. **Internal Bootstrap Diode:** It features an integrated bootstrap diode to simplify the external circuit. When combined with an external capacitor, it generates the floating high-side voltage necessary to turn on the top N-channel MOSFET. 3. **Overlapping Protection:** The circuitry prevents both outputs from being high simultaneously, even if the input signal is corrupted. --- ### Pin Configuration Table | Pin Number | Name | Description | | :--- | :--- | :--- | | 1 | **BST** | Floating bootstrap supply for the upper MOSFET. | | 2 | **PWM** | Input signal from the buck controller. | | 3 | **OD** | Output Disable; shuts down both outputs when pulled low. | | 4 | **VCC** | Input supply voltage (usually 5V). | | 5 | **DRVL** | Low-side gate drive output. | | 6 | **GND** | Ground reference. | | 7 | **SW** | Switch node connection (return path for high-side drive). | | 8 | **DRVH** | High-side gate drive output. | --- ### Typical Application Circuit The ADP3416 is typically placed between a PWM Controller (like the ADP3160) and the Power MOSFETs. ```mermaid graph LR PWM_Controller -->|PWM Signal| ADP3416 ADP3416 -->|High Drive| Upper_MOSFET ADP3416 -->|Low Drive| Lower_MOSFET Upper_MOSFET --> Output_Inductor Lower_MOSFET --> Output_Inductor ``` --- ### Common Use Cases * **Desktop PC Motherboards:** Multi-phase buck converters for CPU power (Vcore). * **Server Power Modules:** High-efficiency DC-DC conversion. * **High-Current Voltage Regulators:** For GPUs and high-end ASICs.