The **LR1106L-22-AF5-R** is a low-dropout (LDO) linear regulator produced by Unisonic Technologies (UTC). It is designed to provide a stable, fixed output voltage while maintaining low noise and low power consumption. --- ### ## Technical Specifications Below are the primary electrical and physical characteristics of the component: | Feature | Specification | | :--- | :--- | | **Output Voltage** | 2.2V (Fixed) | | **Output Current** | 150mA to 250mA (Typical) | | **Package Type** | SOT-25 / SOT-23-5 | | **Input Voltage Range** | Up to 6V - 7V Max | | **Dropout Voltage** | Typically low (approx. 200mV @ 100mA) | | **Quiescent Current** | Low (approx. 50µA - 90µA) | | **Operating Temperature** | -40°C to +85°C | --- ### ## Part Number Breakdown Understanding the suffix codes helps in identifying the exact variant: * **LR1106L**: The base series model (LDO Regulator). * **22**: Indicates the fixed output voltage of **2.2V**. * **AF5**: Refers to the **SOT-25** (SOT-23-5) package style. * **R**: Indicates the packing method (**Tape and Reel**). * **L (at the end of LR1106)**: Often signifies Lead-free / RoHS compliance. --- ### ## Key Internal Features 1. **Low Dropout Voltage:** Allows the device to maintain a 2.2V output even when the input voltage is only slightly higher than the output. 2. **Built-in Protections:** Usually includes thermal shutdown and current limiting to prevent damage during circuit faults. 3. **Stability:** Optimized for use with low-ESR ceramic capacitors, reducing the overall PCB footprint. 4. **ON/OFF Control:** The AF5 (SOT-25) package typically includes a "Chip Enable" (CE) pin, allowing the system to power down the regulator to save energy. --- ### ## Common Applications * **Battery-Powered Devices:** Smartphones, cameras, and handheld sensors. * **Microcontrollers:** Providing clean 2.2V power to low-voltage MCU cores. * **Reference Voltages:** Used in circuits requiring a stable voltage reference for analog-to-digital converters.