The **ADP2165ACPZ-1.2-R7** is a high-efficiency, monolithic, synchronous step-down (buck) DC-to-DC regulator. It is designed by Analog Devices to provide a fixed output voltage with a small footprint, making it ideal for high-density power applications. --- ## 1. Technical Specifications The following table outlines the primary electrical characteristics of the device: | Parameter | Specification | | :--- | :--- | | **Input Voltage Range** | 2.7 V to 5.5 V | | **Fixed Output Voltage** | 1.2 V | | **Continuous Output Current** | 5 A | | **Switching Frequency** | 600 kHz to 1.2 MHz (Sync-able) | | **Efficiency** | Up to 96% | | **Package** | 24-lead LFCSP (4mm x 4mm) | | **Operating Temperature** | -40°C to +125°C | --- ## 2. Key Features and Functions * **Synchronous Rectification:** Integrates both high-side and low-side P-channel and N-channel MOSFETs, eliminating the need for an external Schottky diode and improving efficiency. * **Current Mode Architecture:** Uses peak current mode control for excellent line and load transient response. * **Precision Enable:** Allows for controlled power-up sequencing. * **Power Good (PGOOD) Output:** An open-drain output that indicates when the output voltage is within the nominal range. * **Protection Circuitry:** Includes undervoltage lockout (UVLO), overvoltage protection (OVP), overcurrent protection (OCP), and thermal shutdown (TSD). --- ## 3. Pin Configuration Overview The 24-lead LFCSP package is designed for optimal thermal performance. Key pins include: 1. **PVIN/VIN:** Input power supply pins. 2. **SW:** Switching node connected to the external inductor. 3. **PGND/AGND:** Power and Analog ground paths. 4. **COMP:** Compensation node for the error amplifier to stabilize the control loop. 5. **EN:** Enable input to turn the device on or off. --- ## 4. Part Number Breakdown Understanding the suffix codes for this specific component: | Code | Meaning | | :--- | :--- | | **ADP2165** | Base model number | | **ACPZ** | LFCSP package type (RoHS compliant) | | **1.2** | Fixed output voltage of 1.2V | | **R7** | 7-inch reel packaging (Tape and Reel) | --- ## 5. Typical Applications * High-end consumer electronics. * Communications and networking equipment. * Industrial and instrumentation power supplies. * FPGA, DSP, and microprocessor core power.