The **ADP2107ACPZ-3.3-R7** is a high-efficiency, monolithic, synchronous step-down (buck) DC-to-DC regulator. It is designed to provide a stable 3.3V output from a higher input voltage, making it ideal for battery-powered portable devices. --- ### ## 1. Key Specifications The following table summarizes the primary electrical characteristics of the device: | Parameter | Specification | | :--- | :--- | | **Output Voltage (Fixed)** | 3.3 V | | **Input Voltage Range** | 2.7 V to 5.5 V | | **Continuous Output Current** | 2 A | | **Switching Frequency** | 1.2 MHz | | **Efficiency** | Up to 95% | | **Package** | 16-Lead LFCSP (4mm x 4mm) | | **Operating Temperature** | -40°C to +125°C | --- ### ## 2. Core Features & Functionality #### **Synchronous Rectification** Unlike standard buck regulators that use an external Schottky diode, the ADP2107 integrates two low-resistance N-channel MOSFETs. This reduces power loss and improves efficiency, especially at high load currents. #### **High Switching Frequency** Operating at **1.2 MHz** allows the use of very small ceramic capacitors and tiny inductors (typically 1.5 µH to 2.2 µH), which saves significant PCB real estate. #### **Control Modes** * **PWM Mode:** At medium to high loads, it operates in Pulse Width Modulation (PWM) for low noise and tight voltage regulation. * **Power Save Mode (PSM):** At light loads, the device can automatically shift to pulse-skipping to maintain high efficiency and extend battery life. #### **Safety Mechanisms** The chip includes several internal protection features: * **Undervoltage Lockout (UVLO):** Prevents the chip from operating if the input voltage is too low. * **Thermal Shutdown:** Shuts the device down if the internal junction temperature exceeds 150°C. * **Short-Circuit Protection:** Protects the device and the load during fault conditions. --- ### ## 3. Typical Application Circuit To implement this part, a few external components are required. Below is a conceptual representation of the necessary pins and connections: ```mermaid graph LR Vin[Input 5V] --> PVIN PVIN --> ADP2107 ADP2107 --> SW[Switch Node] SW --> Inductor[L: 2.2uH] Inductor --> Vout[Output 3.3V] Vout --> FB[Feedback Pin] EN[Enable] --> ADP2107 ``` --- ### ## 4. Ordering Information Breakdown The part number **ADP2107ACPZ-3.3-R7** can be decoded as follows: * **ADP2107:** Device series name. * **ACPZ:** Lead-free, RoHS compliant LFCSP package. * **3.3:** Fixed 3.3V output version. * **R7:** 7-inch reel packaging (usually 1,500 pieces per reel).