The **ME58ZAD-R** is an electronic component, specifically a **low-dropout (LDO) linear regulator**. These parts are designed to provide a stable, constant output voltage from a higher, fluctuating input voltage with minimal energy loss (low dropout). Below is a breakdown of its technical specifications and features. --- ### 1. Technical Specifications The "ME" prefix typically identifies the manufacturer as **Microne (Nanjing Micro One Electronics)**. The "58" series is known for high input voltage tolerance and low quiescent current. | Parameter | Typical Value / Range | | :--- | :--- | | **Input Voltage (Max)** | Up to 18V - 40V (model dependent) | | **Output Voltage** | Fixed (Often 3.3V or 5.0V for "ZAD" variants) | | **Output Current** | ~300mA to 500mA | | **Quiescent Current** | Very Low (~2µA to 4µA) | | **Package Type** | SOT-23, SOT-89, or SOT-23-3 | | **Dropout Voltage** | ~400mV @ 100mA | --- ### 2. Key Features * **High Input Voltage:** Unlike standard regulators that handle 5V-6V, this series can often handle spikes or steady inputs up to 18V or higher, making it ideal for battery-powered devices. * **Low Quiescent Current ($I_q$):** This is the current consumed by the IC itself. Because it is extremely low, it is perfect for "Always-on" applications where battery life is critical. * **Protections:** Usually includes built-in thermal shutdown and current limiting to prevent the chip from burning out during a short circuit. --- ### 3. Pinout Configuration (SOT-89 Example) Most ME58 series components follow a standard 3-pin configuration: 1. **GND (Ground):** The common reference point. 2. **VIN (Input):** The unregulated input voltage source. 3. **VOUT (Output):** The regulated, stable DC output. --- ### 4. Typical Applications The ME58ZAD-R is commonly found in: * **IoT Devices:** Sensors that need to sleep for long periods. * **Smart Meters:** Devices connected to power grids requiring high voltage tolerance. * **Battery Management Systems:** Regulating power from Multi-cell Li-ion packs. * **Consumer Electronics:** Remote controls and portable medical devices. --- ### 5. Identification Code In the part number `ME58ZAD-R`: * **ME:** Microne Brand. * **58:** Series number. * **ZAD:** Specific voltage/internal trimming code. * **-R:** Generally indicates "RoHS compliant" or "Tape and Reel" packaging.