The **79D06AL-TM3-R** is a specific part number for a negative voltage regulator, typically manufactured by **Unisonic Technologies (UTC)**. It belongs to the 79xx series of integrated circuits designed to provide a stable, negative output voltage. --- ## 1. Technical Specifications The part number can be broken down to understand its primary characteristics: | Feature | Specification | | :--- | :--- | | **Type** | Negative Voltage Regulator | | **Output Voltage** | -6.0V | | **Max Output Current** | 0.5A (500mA) | | **Input Voltage (Max)** | -25V to -35V (approximate) | | **Package Type** | TO-251 (Short Lead / I-PAK) | | **Operating Temp** | -40°C to +125°C | --- ## 2. Part Number Breakdown The suffixing and prefixing provide details about the packaging and tolerance: * **79D06**: The "79" indicates a negative regulator, and "06" indicates a **-6V** output. The "D" typically refers to the 500mA current class. * **A**: Often refers to a specific voltage tolerance (e.g., ±2% or ±4%). * **L**: Lead-free/RoHS compliant. * **TM3**: Indicates the package type, specifically **TO-251** (also known as I-PAK). * **R**: Tape and Reel or specific packing method. --- ## 3. Pin Configuration For the TO-251 package, the pinout is usually as follows (viewed from the front): 1. **GND (Ground):** The reference point. 2. **IN (Input):** The unregulated negative voltage input. 3. **OUT (Output):** The regulated -6V output. *Note: In negative regulators (79xx), the pinout differs from positive regulators (78xx). Always verify with the manufacturer datasheet.* --- ## 4. Key Features & Protection This IC includes several internal safety mechanisms to prevent failure: * **Thermal Overload Protection:** Shuts down the IC if it gets too hot. * **Short Circuit Current Limiting:** Prevents the chip from burning out if the output is grounded. * **Safe-Area Compensation:** Ensures the output transistor operates within safe limits. --- ## 5. Typical Application Circuit To ensure stability and reduce noise, capacitors are required at the input and output. ```c Unregulated (-V) In ----[ 79D06 ]---- Regulated (-6V) Out | GND Components: - Input Capacitor: 2.2uF Tantalum or 10uF Electrolytic - Output Capacitor: 1uF Tantalum or 10uF Electrolytic ```