LM340K fixed-positive voltage regulators (NOS)

LM340K: This is the part number. The 'LM' prefix often indicates a component from Texas Instruments (originally National Semiconductor). The '340' series refers to a family of fixed-positive voltage regulators, but the LM340K is a special variant.

​-5.0: This indicates the output voltage. In this case, it is a negative 5-volt output. This is a crucial detail, as most common regulators in this series are positive.

​7805P+: This is a related part number. The '7805' is a very common series of positive 5-volt regulators. The presence of both 'LM340K -5.0' and '7805P+' on the same component is unusual, but the primary function is determined by the explicit -5.0 marking. It may be a unique part or a variant with a dual designation.

Specifications

​Output Voltage: +5V (fixed)  

​Output Current: Up to 1.5A  

​Input Voltage Range: 7.5V to 35V  

​Protection Features: Internal thermal overload, short-circuit protection, and safe-area compensation.

​Operating Temperature Range: 0°C to 125°C  

​Package Type: TO-3 (also known as TO-204AA)