## Overview of the BA03CC0WT The **BA03CC0WT** is a high-precision, low dropout (LDO) voltage regulator manufactured by **ROHM Semiconductor**. It is specifically designed to provide a stable 3V output while offering robust protection features for industrial and consumer electronics. --- ### 1. Key Technical Specifications | Parameter | Value | | :--- | :--- | | **Output Voltage** | 3.0 V (Fixed) | | **Input Voltage Range** | 4.0 V to 25.0 V | | **Output Current** | 1.0 A (Maximum) | | **Dropout Voltage** | 0.5 V (Typical at 0.5A) | | **Package Type** | TO-220FP-5 (Through-hole) | | **Operating Temperature** | -40°C to +125°C | --- ### 2. Functional Features The BA03CC0WT includes several internal circuits to ensure reliability and circuit safety: * **Shutdown Switch:** The "WT" suffix indicates the inclusion of an ON/OFF control pin (Shutdown). This allows the device to enter a standby mode, reducing current consumption to nearly zero (approx. 0µA) when the regulator is not needed. * **Overcurrent Protection (OCP):** Prevents the device from being destroyed if the output is short-circuited or the load exceeds 1A. * **Thermal Shutdown (TSD):** Automatically shuts down the IC if the internal junction temperature exceeds safe limits (usually around 175°C). * **High Surge Voltage Tolerance:** Capable of withstanding surges up to 50V, making it suitable for automotive or harsh power environments. --- ### 3. Pin Configuration The TO-220FP-5 package features five distinct pins: 1. **Vcc:** Input Power Supply. 2. **CTL:** Output ON/OFF Control (High = ON, Low = OFF). 3. **GND:** Ground. 4. **OUT:** 3V Regulated Output. 5. **N.C. / TAB:** No connection or Ground (refer to specific datasheet layout). --- ### 4. Typical Application Circuit To ensure stability, the BA03CC0WT requires external capacitors. Below is a conceptual representation: ```text [Input Vin] ----[ C1: 0.33uF ]----( Vcc ) ( OUT )----[ C2: 22uF ]---- [Output 3V] | | (CTL) (GND) | | [Logic High] [Ground] ``` * **C1 (Input Capacitor):** Required if the regulator is located far from the power supply filter. * **C2 (Output Capacitor):** Crucial for phase compensation and preventing oscillation. ROHM recommends using tantalum or electrolytic capacitors for stability. ---