Texas Instruments LM2940CT-15/NOPB 1A, 15V Positive Voltage Regulator

The Texas Instruments LM2940CT-15/NOPB is a high-performance positive voltage regulator designed to deliver a stable 15V output with up to 1A of current. Its key advantage is a very low dropout voltage, typically just 0.5V at full load, ensuring efficient operation even when the input voltage is only slightly above the required output. This makes it an excellent choice for battery-powered applications where maximising runtime is critical.

Engineered for reliability, this regulator incorporates a sophisticated quiescent current reduction circuit. This feature actively lowers the ground current when the differential between input and output voltage exceeds approximately 3V, significantly reducing power dissipation and improving overall system efficiency. The device is built with robust protection features, including reverse battery protection, an internal short-circuit current limit, and mirror image insertion protection, safeguarding both the regulator and your circuit from common installation errors and fault conditions.

The output voltage is precision-trimmed during assembly, guaranteeing accurate and consistent performance directly from the factory. Housed in a sturdy TO-220 through-hole package, it is easy to mount and provides excellent thermal characteristics for heat dissipation. With an operating temperature range of 0°C to 125°C, it is suitable for use in a wide variety of industrial, automotive, and consumer electronic environments where stable voltage regulation is paramount.

Key Specifications

• Output Current: In excess of 1A
• Dropout Voltage: Typically 0.5V at Iout = 1A
• Input Voltage Range: 6V to 26V
• Output Voltage: Fixed 15V
• Protection: Reverse battery, internal short-circuit current limit, mirror image insertion
• Mounting: Through-hole (TO-220 package)
• Operating Temperature: 0°C to 125°C