1A Low Dropout Regulator The LM2940S-12 is a low dropout voltage regulator manufactured by National Semiconductor (NSC). Below are its specifications, descriptions, and features based on Ic-phoenix technical data files:

### **Specifications:**
- **Output Voltage:** 12V (fixed)
- **Output Current:** Up to 1A
- **Dropout Voltage:** Typically 0.5V at full load (1A)
- **Input Voltage Range:** Up to 26V
- **Line Regulation:** 0.3% (typical)
- **Load Regulation:** 0.4% (typical)
- **Quiescent Current:** 10mA (typical)
- **Operating Temperature Range:** -40°C to +125°C
- **Package:** TO-263 (SMD)

### **Descriptions:**
- The LM2940S-12 is a low-dropout (LDO) regulator designed to provide a stable 12V output with high efficiency.
- It includes built-in protection features such as thermal shutdown and current limiting.
- Suitable for battery-powered and automotive applications due to its low dropout voltage.

### **Features:**
- Low dropout voltage (0.5V typical at 1A load)
- Reverse battery protection
- Internal short-circuit current limit
- Thermal shutdown protection
- High ripple rejection (75dB typical)
- Stable with low-ESR output capacitors (≥10µF)

This information is strictly factual from the manufacturer's datasheet.

1A Low Dropout Regulator