The **78R06G-TF4-R** is a low-dropout (LDO) positive voltage regulator that includes a specific **control pin (ON/OFF function)**. It is part of the "78Rxx" series, which improves upon standard 78xx regulators by adding power-saving capabilities. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Output Voltage** | 6.0 V (Fixed) | | **Max Output Current** | 1.0 A | | **Dropout Voltage** | Typically 0.5 V (at 1A) | | **Input Voltage Range** | Up to 15 V - 35 V (depends on thermal load) | | **Package Type** | TO-220F-4L (Full-mold, 4 pins) | | **Quiescent Current** | ~5-10 mA | --- ### 2. Pin Configuration Unlike the standard 3-pin regulators (7806), this part has **4 pins**. 1. **Pin 1 (Vin):** Unregulated DC input voltage. 2. **Pin 2 (Vout):** Regulated 6V DC output. 3. **Pin 3 (GND):** Ground. 4. **Pin 4 (V_control):** The ON/OFF control pin. When pulled high (typically >2.0V), the regulator turns on. When pulled low (<0.8V), the regulator shuts down to save power. --- ### 3. Features and Protection * **Low Dropout (LDO):** It can maintain a stable 6V output even when the input voltage is only slightly above 6.5V. * **Built-in Protection:** * **Thermal Shutdown:** Automatically turns off if the chip exceeds its temperature limit. * **Over-Current Protection:** Limits output current to prevent damage during a short circuit. * **Remote Control:** The 4th pin allows a microcontroller (like an Arduino or ESP32) to toggle the power to a sub-circuit without needing a heavy-duty mechanical switch. --- ### 4. Part Number Breakdown The suffixing usually follows this logic: * **78R:** Series identifier (LDO with Control Pin). * **06:** Output voltage (6 Volts). * **G:** Usually denotes "Green" (Halogen-free/RoHS compliant). * **TF4:** Package code for TO-220F (4-lead, isolated package). * **R:** Tape and Reel or specific packing designation. --- ### 5. Application Example ```c // Example Logic for Pin 4 Control // Connect Pin 4 to a MCU GPIO pin digitalWrite(POWER_PIN, HIGH); // 6V Output is active digitalWrite(POWER_PIN, LOW); // 6V Output is cut off (Sleep Mode) ```