The **ADP2371ACPZ-1.2-R7** is a high-efficiency, low quiescent current, step-down (buck) DC-to-DC regulator manufactured by Analog Devices. It is specifically designed for applications where power conservation and space efficiency are critical. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Input Voltage Range** | 3.2 V to 15 V | | **Fixed Output Voltage** | 1.2 V | | **Output Current** | 800 mA (Maximum) | | **Quiescent Current ($I_q$)** | 14 µA (Typical, no load) | | **Switching Frequency** | 600 kHz or 1.2 MHz (Selectable) | | **Package Type** | 8-lead LFCSP (3mm x 3mm) | | **Operating Temperature** | -40°C to +125°C | --- ### 2. Functional Features * **Fixed Output:** This specific variant is factory-set to a **1.2 V output**, eliminating the need for external feedback resistors and improving accuracy. * **Power Saving Mode:** It automatically transitions to a power-saving mode under light load conditions to maintain high efficiency. * **Integrated Power Switches:** Includes internal high-side and low-side power MOSFETs, reducing the total bill of materials (BOM). * **Safety Protections:** * Overcurrent Protection (OCP) * Thermal Shutdown (TSD) * Undervoltage Lockout (UVLO) * **Precision Enable:** Allows for precise control over the power-up sequencing. --- ### 3. Pin Configuration (8-Lead LFCSP) | Pin No. | Name | Description | | :--- | :--- | :--- | | 1 | **VIN** | Input power supply pin. | | 2 | **EN** | Enable input. Drive high to turn on the device. | | 3 | **FB / VOUT** | Feedback input or Output sense pin for fixed versions. | | 4 | **GND** | Ground reference. | | 5 | **SW** | Switch node; connects to the external inductor. | | 6 | **SYNC/MODE** | External clock synchronization or mode selection. | | 7 | **PG** | Power Good open-drain output. | | 8 | **BST** | Bootstrap pin for high-side gate driver. | --- ### 4. Part Number Breakdown The part number **ADP2371ACPZ-1.2-R7** can be decoded as follows: * **ADP2371:** Base model number. * **ACPZ:** Lead-free, LFCSP package. * **1.2:** Indicates the fixed **1.2 V** output voltage. * **R7:** Indicates Tape and Reel packaging (usually 7-inch reel). --- ### 5. Typical Applications * Portable and battery-powered equipment. * Industrial and medical instruments. * Point-of-load regulation in low-power communication systems.