The **ADP1823ACPZ-R7** is a high-performance, dual-output, synchronous step-down (buck) DC-to-DC controller manufactured by Analog Devices. It is designed to drive N-channel MOSFETs to convert higher input voltages into two lower, regulated output voltages. --- ### ## Technical Specifications Overview Below are the primary technical parameters for the ADP1823 series: | Parameter | Specification | | :--- | :--- | | **Input Voltage Range** | 3.0V to 20V | | **Output Channels** | 2 Independent Outputs | | **Switching Frequency** | 300 kHz or 600 kHz (Selectable) | | **Topology** | Synchronous Buck (Step-Down) | | **Package** | 32-LFCSP (5mm x 5mm) | | **Operating Temperature** | -40°C to +125°C | | **Output Current** | Limited only by external MOSFETs | --- ### ### Core Functional Blocks 1. **Dual-Phase Control:** The two channels operate $180^\circ$ out of phase. This reduces input ripple current and minimizes the requirement for input capacitance, which saves board space and cost. 2. **Soft Start:** Includes programmable soft-start timers for each channel to prevent inrush current during power-up. 3. **Power Good Indicator:** Provides a logic signal to indicate when the output voltage is within the regulated range. 4. **Protection Suite:** * **Overcurrent Protection (OCP):** Uses the $R_{DS(ON)}$ of the low-side MOSFET to sense current, eliminating the need for a bulky sense resistor. * **Thermal Shutdown:** Protects the IC from overheating. * **Undervoltage Lockout (UVLO):** Ensures the chip operates only when the input voltage is stable. --- ### ### Typical Application Circuit The ADP1823 requires several external components to function as a complete power supply. ```mermaid graph LR Vin[Input Voltage] --> ADP1823 ADP1823 --> FET1[High-Side MOSFET] ADP1823 --> FET2[Low-Side MOSFET] FET1 --> Inductor FET2 --> Inductor Inductor --> Vout[Regulated Output] Vout --> FB[Feedback Loop] FB --> ADP1823 ``` ### ### Part Number Breakdown * **ADP1823:** Base model (Dual PWM Controller). * **ACPZ:** Package indicator (LFCSP, Lead-Free). * **R7:** Packaging format (7-inch Tape and Reel, typically 1,500 units). --- ### ### Common Use Cases * **Telecommunications:** High-density power modules. * **Consumer Electronics:** Set-top boxes and gaming consoles. * **Industrial:** DSP and FPGA power supplies (providing 1.8V, 3.3V, or 5.0V rails). * **Computing:** Servers and networking equipment.