The **LR9113G-30-AF5-R** is a low-dropout (LDO) linear regulator manufactured by UTC (Unisonic Technologies). It is designed to provide a stable fixed output voltage with low noise and low quiescent current, making it ideal for battery-powered portable devices. --- ### 1. Key Technical Specifications The following table summarizes the primary electrical characteristics of the component: | Parameter | Specification | |:---|:---| | **Part Number** | LR9113G-30-AF5-R | | **Output Voltage** | 3.0V (Fixed) | | **Input Voltage Range** | Up to 6.0V | | **Output Current** | 300mA - 600mA (typical range for this series) | | **Dropout Voltage** | Low (typically < 300mV at full load) | | **Package Type** | SOT-25 / SOT-23-5 | | **Quiescent Current** | ~70µA (Typical) | | **Operating Temp** | -40°C to +85°C | --- ### 2. Part Number Breakdown Understanding the suffix codes helps in identifying the specific variant: * **LR9113**: Series name (LDO Linear Regulator). * **G**: Halogen-free and Lead-free (Green). * **30**: Indicates a **3.0V** fixed output voltage. * **AF5**: Refers to the **SOT-25** (also known as SOT-23-5) package. * **R**: Tape and Reel packaging. --- ### 3. Pin Configuration (SOT-25) The device typically follows a standard 5-pin layout: 1. **VIN**: Input Voltage Supply. 2. **GND**: Ground Reference. 3. **CE (Enable)**: High = On, Low = Shutdown. 4. **NC/BYP**: No connection or Bypass capacitor (for noise reduction). 5. **VOUT**: Regulated 3.0V Output. --- ### 4. Circuit Implementation To ensure stability, LDOs require external capacitors. Below is a representation of a typical application circuit: ```mermaid graph LR Input[Vin] --> C1[Cin 1uF] C1 --> IC[LR9113G] IC --> C2[Cout 1uF] C2 --> Output[Vout 3.0V] IC --- GND[Ground] ``` --- ### 5. Common Applications * **Mobile Devices**: Smartphones, tablets, and handheld GPS units. * **Battery Management**: Maintaining 3.0V logic levels from a Li-Ion battery. * **Wireless Modules**: Powering Bluetooth or Wi-Fi chips that require low-noise power. * **Portable Instrumentation**: Precision sensors requiring stable voltage.