The **P1482L-S08-R** is a high-efficiency monolithic synchronous step-down (Buck) regulator manufactured by UTC (Unisonic Technologies Co., Ltd). It is commonly used in power management for consumer electronics. --- ### ## Technical Specifications | Parameter | Specification | | :--- | :--- | | **Input Voltage Range** | 4.75V to 18V | | **Output Current** | Up to 2A | | **Switching Frequency** | Fixed 340kHz | | **Efficiency** | Up to 93% | | **Package Type** | SOP-8 (Surface Mount) | | **Feedback Voltage** | 0.923V | | **Standby Current** | < 1µA (Shutdown mode) | --- ### ## Pin Configuration (SOP-8) | Pin No. | Name | Description | | :---: | :--- | :--- | | 1 | **BS** | Bootstrap. Connect a capacitor between BS and SW to drive the high-side switch. | | 2 | **IN** | Supply Input. Requires a bypass capacitor to ground. | | 3 | **SW** | Switch Node. Connects the internal power switch to the external inductor. | | 4 | **GND** | Ground. | | 5 | **FB** | Feedback Input. Used to set the output voltage via a resistor divider. | | 6 | **COMP** | Compensation Node. Used to stabilize the control loop. | | 7 | **EN** | Enable Input. Pull high to turn on; pull low to turn off. | | 8 | **SS** | Soft Start. Used to control the output voltage ramp-up time. | --- ### ## Key Features & Protection * **Synchronous Rectification:** Eliminates the need for an external Schottky diode, reducing heat and improving efficiency. * **Internal Soft-Start:** Prevents inrush current during power-up, protecting the source and the IC. * **Protection Mechanisms:** * Cycle-by-cycle over-current protection. * Thermal shutdown (over-temperature protection). * Under-voltage lockout (UVLO). ### ## Typical Application The P1482L is ideal for applications where a higher input voltage (like a 12V adapter) needs to be converted down to lower logic levels: * Set-top boxes (STBs) * Distributed Power Systems * LCD Monitors and TVs * Networking equipment (Routers/Modems)