The **BA03CC0FP** is a high-performance, low dropout (LDO) linear voltage regulator manufactured by **ROHM Semiconductor**. It is specifically designed to provide a stable output of 3V and is commonly found in automotive and industrial electronics due to its high reliability. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Output Voltage** | 3.0V (Fixed) | | **Input Voltage Range** | 4.0V to 25.0V | | **Output Current** | 1.0A (Maximum) | | **Dropout Voltage** | 0.5V (at Io = 0.5A) | | **Operating Temperature** | -40°C to +125°C | | **Package Type** | TO252-3 (DPAK) | | **Output Tolerance** | ±2% | --- ### 2. Main Features * **Low Dropout Voltage:** Since the dropout is low (typ. 0.5V), the device remains efficient even when the input voltage is close to the output voltage. * **Built-in Protection Circuits:** * **Overcurrent Protection (OCP):** Prevents destruction of the IC when the output is shorted. * **Thermal Shutdown (TSD):** Automatically shuts down the device if the internal junction temperature exceeds safety limits. * **High Input Voltage Resilience:** Can handle surges up to 25V, making it suitable for automotive power rails. * **Ceramic Capacitor Compatible:** Designed to remain stable even when using low-ESR ceramic capacitors for noise filtering. --- ### 3. Pin Configuration (TO252-3) | Pin No. | Name | Function | | :--- | :--- | :--- | | **1** | **Vcc** | Input Voltage Supply | | **2/4** | **GND** | Ground (Pin 2 is often connected to the cooling Fin) | | **3** | **OUT** | Regulated 3.0V Output | --- ### 4. Typical Application Circuit To ensure stability and reduce noise, external capacitors are required. ```markdown Vin ----[ C1: 0.33uF ]----( Vcc ) [ BA03CC0FP ] ( OUT )----[ C2: 22uF ]---- Vout (3V) | | (GND) (GND) ``` 1. **C1 (Input Capacitor):** Prevents oscillations caused by long input leads. 2. **C2 (Output Capacitor):** Essential for loop stability and phase compensation. --- ### 5. Common Applications * **Automotive Systems:** Powering microcontrollers in ECUs. * **Industrial Equipment:** Reliable power for sensors and logic controllers. * **Consumer Electronics:** Step-down regulation for 3V logic circuits from 5V or 12V rails.