The **ADP1828YRQZ-R7** is a high-performance, synchronous step-down (buck) DC-to-DC controller manufactured by Analog Devices. It is designed to drive external N-channel MOSFETs to deliver high currents for point-of-load applications. --- ### ## Key Specifications and Features | Feature | Specification / Description | | :--- | :--- | | **Type** | Synchronous Buck Controller | | **Input Voltage Range** | 3.0 V to 20 V | | **Output Voltage Range** | 0.6 V to 85% of $V_{IN}$ | | **Switching Frequency** | 300 kHz to 600 kHz (Resistor Programmable) | | **Operating Temperature** | -40°C to +125°C | | **Package Type** | QSOP-20 (YRQZ) | | **Mounting Type** | Surface Mount | --- ### ### Core Functional Blocks 1. **Pulse-Width Modulation (PWM) Control:** The device uses a voltage-mode control architecture with an input voltage feed-forward system. This provides excellent rejection of input voltage transients and simplifies the compensation loop. 2. **Gate Drivers:** It integrates powerful drivers for both high-side and low-side N-channel MOSFETs. The synchronous rectification increases efficiency significantly compared to standard diode-based buck converters. 3. **Soft-Start and Tracking:** It includes a programmable soft-start feature to prevent inrush current during power-up and supports voltage tracking for complex power sequencing in FPGAs or DSPs. 4. **Protection Circuitry:** - **Overcurrent Protection (OCP):** Uses the $R_{DS(ON)}$ of the low-side MOSFET to sense current, eliminating the need for an external sense resistor. - **Thermal Shutdown:** Protects the IC from overheating. - **Undervoltage Lockout (UVLO):** Ensures the device only operates when the input voltage is stable. --- ### ### Pin Configuration Highlights | Pin | Name | Function | | :--- | :--- | :--- | | **19** | **BST** | Bootstrap pin for the high-side MOSFET gate driver. | | **17** | **DH** | Drive signal for the high-side N-channel MOSFET. | | **14** | **DL** | Drive signal for the low-side N-channel MOSFET. | | **1** | **FREQ** | Frequency set pin; connects to a resistor to define the switching speed. | | **4** | **FB** | Feedback pin used to set the output voltage via a divider. | --- ### ### Typical Applications * **Telecommunications:** Base stations and networking equipment. * **Computing:** High-end servers and storage systems. * **Embedded Systems:** Powering FPGAs, ASICs, and Digital Signal Processors (DSPs). * **Industrial:** High-current point-of-load (POL) power modules.