The **UR7533G-AF5-R** is a high-performance, low-dropout (LDO) linear voltage regulator manufactured by Unisonic Technologies (UTC). It is primarily designed for low power consumption and high stability in portable electronic devices. --- ### 1. Key Technical Specifications Below are the primary electrical characteristics of the UR7533G-AF5-R: | Parameter | Specification | | :--- | :--- | | **Output Voltage** | 3.3V (Fixed) | | **Input Voltage Range** | Up to 30V | | **Output Current** | 100mA (Maximum) | | **Quiescent Current** | ~1.2µA (Ultra-low) | | **Dropout Voltage** | ~100mV @ 40mA | | **Accuracy** | ±3% | | **Package Type** | SOT-25 / SOT-23-5 | --- ### 2. Part Number Breakdown Understanding the nomenclature helps identify specific features of this variant: * **UR75**: Series designation (Low Dropout CMOS Voltage Regulator). * **33**: Indicates a **3.3V** fixed output. * **G**: Halogen-free and Green packaging. * **AF5**: Refers to the **SOT-25** (also known as SOT-23-5) package type. * **R**: Tape and Reel packaging for automated assembly. --- ### 3. Pin Configuration (SOT-25) The UR7533G-AF5-R typically follows this pinout structure: | Pin Number | Name | Description | | :--- | :--- | :--- | | 1 | **VIN** | Unregulated Input Voltage | | 2 | **GND** | Ground | | 3 | **CE / EN** | Chip Enable (High = On, Low = Off) | | 4 | **NC** | No Connection | | 5 | **VOUT** | Regulated 3.3V Output | --- ### 4. Core Features & Benefits * **Ultra-Low Quiescent Current:** With a current draw of only 1.2µA, it is ideal for battery-powered applications where standby time is critical. * **High Input Voltage Tolerance:** Unlike many CMOS LDOs that cap at 5V or 6V, this part can handle inputs up to 30V, making it suitable for industrial sensors and automotive-adjacent electronics. * **Built-in Protections:** It typically includes short-circuit protection and thermal shutdown circuitry. --- ### 5. Application Circuit Example To ensure stability, it is recommended to use capacitors on both the input and output. ```markdown VIN ----[ C1: 10uF ]----( VIN Pin ) | GND --------------------( GND Pin ) | VOUT ---( VOUT Pin )----[ C2: 10uF ]---- 3.3V Output ```