The **LR9113L-12-AF5-R** is a specific low-dropout (LDO) linear regulator manufactured by UTC (Unisonic Technologies Co., Ltd). It is designed for applications requiring high stability, low noise, and low power consumption. --- ### 1. Technical Specifications The following table summarizes the key electrical characteristics of the LR9113L-12-AF5-R: | Parameter | Specification | | :--- | :--- | | **Output Voltage** | 1.2V (Fixed) | | **Output Current** | 300mA (Minimum) | | **Input Voltage Range** | Up to 6.0V | | **Dropout Voltage** | Typically 270mV @ 300mA | | **Quiescent Current** | 50µA (Typical) | | **Package Type** | SOT-25 / SOT-23-5 | | **Operating Temperature** | -40°C to +85°C | --- ### 2. Part Number Breakdown The nomenclature of this part provides specific details about its configuration: * **LR9113L**: The series name (High Ripple Rejection, Low Dropout CMOS Voltage Regulator). * **12**: Represents the fixed output voltage (1.2V). * **AF5**: Indicates the package type (SOT-25). * **R**: Indicates the packing type (Tape and Reel). --- ### 3. Key Features * **High PSRR:** Excellent Power Supply Rejection Ratio, making it suitable for noise-sensitive circuits like RF or audio. * **Built-in Protections:** Includes internal thermal shutdown and current limit protection to prevent device failure under fault conditions. * **Low Quiescent Current:** Extends battery life in portable electronics. * **Stability:** Designed to work effectively with low-ESR ceramic capacitors. --- ### 4. Typical Application Circuit In a standard design, the LR9113L-12-AF5-R requires minimal external components. ```text Input Voltage (Vin) ----[Cin: 1uF]----[ VIN ] [ VOUT ]----[Cout: 1uF]---- Output (1.2V) [ GND ] [ EN ] <--- Control Logic (High = On) ``` ### 5. Common Applications * Battery-powered equipment (Smartphones, Tablets). * Reference voltage sources for ADCs/DACs. * Low-voltage microcontrollers and FPGA core power rails. * Wireless communication modules. ---