The **L3380-33-AF5-R** is a specific part number typically associated with a **Low Dropout (LDO) Linear Regulator**. Below is a detailed breakdown of its electronic specifications and characteristics. --- ### 1. General Overview The L3380 series is designed for applications requiring low noise, high ripple rejection, and low dropout voltages. The "33" in the suffix usually denotes a fixed output voltage of **3.3V**. ### 2. Technical Specifications | Parameter | Specification | | :--- | :--- | | **Type** | Fixed Low Dropout (LDO) Regulator | | **Output Voltage** | 3.3V | | **Max Output Current** | 300mA - 500mA (typical for this series) | | **Input Voltage Range** | Up to 6V - 7V | | **Package Type** | SOT-25 / SOT-23-5 (indicated by "AF5") | | **Operating Temperature** | -40°C to +85°C | | **Mounting Type** | Surface Mount (SMD) | --- ### 3. Part Number Decoder Understanding the nomenclature helps in identifying the exact variant: * **L3380**: The base series model number. * **33**: Indicates a fixed output of **3.3 Volts**. * **AF5**: Refers to the physical package style, typically a **SOT-23-5** (5-pin small outline transistor package). * **R**: Generally signifies the packaging method, standing for **Tape & Reel**. --- ### 4. Typical Pin Configuration (SOT-23-5) In an AF5 (SOT-25/23-5) package, the pinout is usually structured as follows: | Pin Number | Function | Description | | :--- | :--- | :--- | | 1 | **VIN** | Input Voltage supply | | 2 | **GND** | Ground | | 3 | **EN / SHDN** | Enable or Shutdown pin (High = ON, Low = OFF) | | 4 | **BP / NC** | Bypass (for noise reduction) or No Connection | | 5 | **VOUT** | Regulated 3.3V Output | --- ### 5. Key Features & Applications * **Low Quiescent Current:** Minimizes power consumption during standby mode, making it ideal for battery-powered devices. * **High PSRR:** Excellent Power Supply Rejection Ratio to filter out noise from the input source. * **Stability:** Typically requires only a small ceramic capacitor (e.g., 1µF) at the output for stability. * **Applications:** Mobile phones, laptops, battery-powered hand-held instruments, and noise-sensitive RF circuits.