The **US107ALL-AF5-R** is a specific integrated circuit, typically a low-dropout (LDO) linear regulator or a specialized power management chip manufactured by **UTC (Unisonic Technologies Co., Ltd)**. Below is a detailed breakdown of its electronic specifications and technical characteristics. --- ### 1. General Overview The US107 series is designed for applications requiring precise voltage regulation with low power consumption. The "ALL" suffix usually denotes specific voltage adjustments or internal logic configurations, while "AF5" refers to the package type. ### 2. Technical Specifications | Parameter | Description | | :--- | :--- | | **Manufacturer** | UTC (Unisonic Technologies) | | **Component Type** | CMOS Low Dropout Regulator (LDO) / Voltage Detector | | **Package Type** | SOT-25 (AF5) | | **Output Type** | Fixed or Adjustable (depending on sub-series) | | **Mounting Type** | Surface Mount (SMD) | | **RoHS Status** | Lead-Free/RoHS Compliant (indicated by -R) | --- ### 3. Pinout Configuration (Standard SOT-25) In a standard AF5 (SOT-25) package for this series, the pin configuration is typically as follows: 1. **VIN**: Input Voltage Supply. 2. **GND**: Ground Reference. 3. **CE / EN**: Chip Enable (Active High) – turns the device on/off. 4. **NC / ADJ**: No Connection or Output Adjustment pin. 5. **VOUT**: Regulated Output Voltage. --- ### 4. Key Features * **Low Quiescent Current:** Designed to minimize battery drain in portable electronics. * **Low Dropout Voltage:** Maintains regulation even when the input voltage is very close to the output voltage. * **Stability:** Optimized for use with low-ESR ceramic capacitors. * **Built-in Protections:** Usually includes thermal shutdown and over-current protection. ### 5. Part Number Decoder Understanding the suffix codes: * **US107**: The base model/series. * **ALL**: Internal logic/voltage specification code. * **AF5**: Refers to the **SOT-25** package. * **R**: Indicates **Tape & Reel** packaging for automated assembly. --- ### 6. Common Applications * Battery-powered equipment (Smartphones, Tablets). * Camera modules and portable imaging sensors. * Reference voltage sources for Microcontrollers (MCUs). * Wireless communication modules (Bluetooth/Wi-Fi).