The **LR9113G-15-AF5-R** is a high-performance, low-dropout (LDO) linear regulator manufactured by UTC (Unisonic Technologies). It is designed for applications requiring low noise, high power supply rejection ratios (PSRR), and stable voltage output. --- ### 1. Key Technical Specifications | Parameter | Specification | |:---|:---| | **Output Voltage** | 1.5V (Fixed) | | **Output Current** | 300mA to 500mA (Typical) | | **Input Voltage Range** | Up to 6.0V | | **Dropout Voltage** | Low (typically ~270mV @ 300mA) | | **Package Type** | SOT-25 / SOT-23-5 | | **Operating Temperature** | -40°C to +85°C | | **Suffix "G"** | Halogen-free and Lead-free (RoHS Compliant) | --- ### 2. Part Number Breakdown Understanding the nomenclature helps in identifying the specific variant: * **LR9113**: The base series number for this specific CMOS LDO regulator. * **G**: Represents "Green" (Halogen-free and Lead-free). * **15**: Indicates a fixed output voltage of **1.5V**. * **AF5**: Refers to the package type (SOT-25). * **R**: Indicates the packing method (Tape and Reel). --- ### 3. Pin Configuration (SOT-25) The device typically utilizes a 5-pin layout to provide control and stability: 1. **VIN**: Input Voltage Supply. 2. **GND**: Ground Reference. 3. **EN/CE**: Chip Enable (High = On, Low = Shutdown). 4. **NC/BP**: No connection or Bypass capacitor (used to reduce noise). 5. **VOUT**: Regulated 1.5V Output. --- ### 4. Features & Applications #### Features * **Low Quiescent Current**: Ideal for battery-powered devices to extend battery life. * **Stable with Ceramic Capacitors**: Optimized for use with low-ESR MLCC capacitors. * **Built-in Protections**: Includes Thermal Shutdown and Current Limiting to prevent damage during fault conditions. * **High PSRR**: Effectively filters out ripple from the input power source. #### Common Applications * **Mobile Devices**: Smartphones, tablets, and handheld GPS. * **Wearables**: Smartwatches and fitness trackers. * **Reference Voltages**: Providing a steady 1.5V rail for microprocessors or sensors. * **Wireless Communication**: Low noise power for RF modules. --- ### 5. Typical Application Circuit ```电路 Input (VIN) ----[ C1: 1uF ]----( PIN 1 ) ( PIN 5 )----[ C2: 1uF ]---- Output (1.5V) | | Enable Signal -----------------( PIN 3 ) ( PIN 2 )---- Ground ```