### LD1085D2M25-R Overview The **LD1085D2M25-R** is a low-drop voltage regulator capable of providing up to 3 A of output current. It is part of the LD1085 series produced by STMicroelectronics, designed to provide high efficiency and high current output for various electronic circuits. --- ### Key Technical Specifications The following table highlights the primary electrical characteristics of the device: | Parameter | Specification | | :--- | :--- | | **Output Voltage** | 2.5 V (Fixed) | | **Maximum Output Current** | 3.0 A | | **Dropout Voltage** | 1.3 V (typical at 3 A) | | **Input Voltage (Max)** | 30 V | | **Package Type** | D2PAK (TO-263) | | **Operating Temperature** | -40°C to 125°C | | **Protection Features** | Internal Current and Thermal Limit | --- ### Detailed Part Number Breakdown Understanding the suffix codes helps identify specific variants of the component: * **LD1085**: The series name (High current, low dropout regulator). * **D2M**: Refers to the physical package, specifically the **D2PAK** (Surface mount). * **25**: Indicates the fixed output voltage of **2.5V**. * **-R**: Indicates **Tape and Reel** packaging for automated assembly. --- ### Internal Features and Protections The LD1085D2M25-R is engineered for durability and precision in power management: 1. **Low Dropout (LDO) Performance:** Unlike standard linear regulators (like the 7805), this part requires a much smaller difference between input and output voltage to function properly, reducing heat dissipation. 2. **Current Limiting:** Protects the regulator and the load in the event of a short circuit or overcurrent condition. 3. **Thermal Shutdown:** The device will automatically turn off if its internal junction temperature exceeds safe limits (typically around 150°C). 4. **Pinout Configuration:** * **Pin 1:** Ground * **Pin 2 / Tab:** Output (2.5V) * **Pin 3:** Input --- ### Typical Application Circuit To ensure stability, a minimum capacitor value is required at the output. A 10µF tantalum or larger electrolytic capacitor is typically recommended. ```c // Basic Circuit Representation [Input Voltage] ----> (Pin 3: Vin) [LD1085D2M25-R] (Pin 2: Vout) ----> [2.5V Output] | (Pin 1: GND) | [Common Ground] ``` ---