The **LD2985G-C0-AF5-R** is a low-dropout (LDO) linear voltage regulator. It is designed for applications requiring high precision, low noise, and low power consumption, such as mobile phones and battery-powered portable devices. --- ### 1. Key Technical Specifications The following table summarizes the primary electrical characteristics of the device: | Parameter | Value / Specification | | :--- | :--- | | **Output Type** | Fixed | | **Output Voltage** | 3.0V | | **Input Voltage (Max)** | 16V | | **Output Current** | 150 mA | | **Dropout Voltage** | ~280mV @ 150mA | | **Package Type** | SOT-25 / SOT-23-5 | | **Pin Count** | 5 Pins | | **Operating Temp** | -40°C to +125°C | --- ### 2. Functional Pinout Description The device typically uses a standard 5-pin configuration: 1. **VIN (Input):** Supplies power to the regulator. 2. **GND (Ground):** Common reference point. 3. **ON/OFF (Enable):** Logic-controlled shutdown; pulling this low puts the chip in standby mode (< 1µA). 4. **BYPASS:** Connecting a small capacitor here significantly reduces output noise. 5. **VOUT (Output):** The regulated 3.0V DC output. --- ### 3. Features and Advantages * **Low Quiescent Current:** It consumes very little power internally, extending battery life in portable electronics. * **Low Noise Performance:** By adding an external capacitor to the Bypass pin, the output becomes very clean, which is essential for RF and sensitive analog circuits. * **Electronic Shutdown:** Includes a control pin to turn the regulator on or off via a microcontroller (MCU). * **Internal Protections:** Includes thermal overload protection and current limiting to prevent damage during a short circuit or overheating. --- ### 4. Part Number Breakdown (Naming Convention) The suffix codes usually indicate specific manufacturing details: * **LD2985:** Series Name (150mA LDO). * **G:** Halogen-free / RoHS Compliant. * **C0:** Indicates the specific fixed output voltage (3.0V). * **AF5:** Package code (SOT-25). * **R:** Tape and Reel packaging. ---