The **APL1515-R** is a high-performance, low-dropout (LDO) linear regulator manufactured by Anpec Electronics. It is primarily designed for applications requiring high output current and low input voltage, commonly used in computer motherboards and high-speed bus terminators. --- ## 1. Technical Specifications The following table summarizes the key electrical characteristics of the APL1515-R: | Parameter | Specification | | :--- | :--- | | **Input Voltage Range** | 1.2V to 5.5V | | **Output Current** | Up to 1.5A | | **Dropout Voltage** | ~0.5V @ 1.5A (Typical) | | **Output Voltage Type** | Fixed (Adjustable versions available in series) | | **Operating Temperature** | -40°C to +125°C | | **Package Type** | SOP-8, SOT-223, or TO-252 | --- ## 2. Key Features The "R" suffix in APL1515-R usually denotes a specific variation (often related to the **Adjustable** pin configuration or the **RoHS** compliance/Tape & Reel packaging). * **Low Quiescent Current:** Minimizes power consumption during standby modes. * **Fast Transient Response:** Capable of handling sudden changes in load current without significant voltage drops, making it ideal for CPU/GPU power rails. * **Built-in Protection:** * **Over-Temperature Protection (OTP):** Shuts down the IC if internal heat exceeds safe limits. * **Current Limit Protection:** Prevents damage to the IC during a short-circuit or overload. * **Stability:** Designed to be stable even with low-ESR ceramic capacitors. --- ## 3. Typical Pin Configuration (SOP-8 Example) In a standard 8-pin package, the pinout generally follows this structure: ```text Pin 1: VOUT (Output Voltage) Pin 2: VOUT (Output Voltage) Pin 3: VOUT (Output Voltage) Pin 4: ADJ/GND (Feedback or Ground) Pin 5: GND (Ground) Pin 6: VIN (Input Voltage) Pin 7: VIN (Input Voltage) Pin 8: VIN (Input Voltage) ``` --- ## 4. Common Applications * **Motherboards:** Powering the I/O pins and chipsets. * **Graphic Cards:** Providing stable voltage to auxiliary logic. * **Networking Equipment:** Used in routers and switches for 1.2V - 3.3V rails. * **Set-top Boxes:** Converting 5V main rails to lower logic levels.