The **LR9102L-25-AF5-R** is a specific low-dropout (LDO) linear voltage regulator manufactured by **UTC (Unisonic Technologies)**. It is designed for applications requiring high precision, low noise, and low power consumption. --- ### 1. Key Specifications and Features The following table summarizes the primary electrical characteristics of the component: | Feature | Specification | | :--- | :--- | | **Output Voltage** | 2.5V (Fixed) | | **Input Voltage Range** | Up to 7.0V | | **Output Current** | 300mA (Typical) | | **Dropout Voltage** | Low (typically < 300mV @ 300mA) | | **Quiescent Current** | ~50µA (Low power consumption) | | **Package Type** | SOT-25 / SOT-23-5 | | **Tolerance** | ±2.0% | --- ### 2. Part Number Breakdown Understanding the suffix codes helps in identifying the exact variant: * **LR9102**: Basic Series Number (CMOS LDO Regulator). * **L**: Lead-free/Halogen-free plating. * **25**: Indicates the fixed output voltage of **2.5V**. * **AF5**: Refers to the package type (**SOT-25** / SOT-23-5). * **R**: Shipping method (**Tape and Reel**). --- ### 3. Pin Configuration (SOT-25) Standard pinout for this LDO series: 1. **VIN**: Input Voltage Supply. 2. **GND**: Ground. 3. **CE (Enable)**: High = On; Low = Shutdown mode. 4. **NC/BP**: No connection or Bypass (for noise reduction via capacitor). 5. **VOUT**: Regulated 2.5V Output. --- ### 4. Typical Application Circuit To ensure stability, LDOs require external capacitors. Below is a representation of a standard implementation: ```text Input (Vin) ----[ C1: 1uF ]----( VIN ) ( VOUT )----[ C2: 1uF ]---- Output (2.5V) | | (GND) (GND) | | Enable Signal -----------------( CE ) ( NC ) ``` ### 5. Common Applications * **Battery-powered devices**: Smartphones, cameras, and handheld tools. * **Post-regulation**: Cleaning up noise from switching power supplies. * **Reference Voltages**: Providing a stable 2.5V rail for microcontrollers (MCUs) or sensors. ---