( Brand: National Semiconductor ), ( Manufacturer Part Number: LM7912CK ), ( Part Type: Voltage Regulator )
The LM7912CK is a high-performance, adjustable, negative voltage regulator from National Semiconductor. This semiconductor device is designed to provide a stable, regulated output voltage, typically within a range of -1.5V to -30V, with a maximum load current of 1.5A.
The LM7912CK operates on an input voltage range of 5V to 36V, making it suitable for a wide range of power supply applications. It features a thermal protection circuit that shuts down the output when the junction temperature exceeds 125 C, ensuring the safety of the device and connected components.
The device is packaged in a TO-3 type metal can, which provides excellent heat dissipation, ensuring stable operation under high power loads. The LM7912CK is available as a no-load (NOS) device, meaning it is not tested with a load and may have some manufacturing variations.
The LM7912CK is ideal for use in applications such as audio power amplifiers, industrial equipment, and high-power switching regulators that require a stable negative voltage supply. Its high accuracy, low noise, and excellent stability make it a preferred choice for critical voltage regulation applications.
Key Features:* Adjustable output voltage from -1.5V to -30V
* Operates on input voltage range of 5V to 36V
* Maximum load current of 1.5A
* Thermal protection circuit
* TO-3 metal can packaging for excellent heat dissipation
* Suitable for high-power switching regulators, industrial equipment, and audio power amplifiers.
Pros of buying LM7912CK Negative Voltage Regulator:1. Reliability: The LM7912 is a trusted and widely-used linear voltage regulator from National Semiconductor (now part of Texas Instruments). It has been in production for many years and has a proven track record of reliability.
2. Wide Input Voltage Range: The LM7912 can handle input voltages between 7V and 36V, making it suitable for a wide range of power supplies.
3. Low Noise: The LM7912 has a low noise output, which is ideal for applications that require clean power, such as audio amplifiers.
4. High Efficiency: The LM7912 has a high efficiency, which means it converts a large percentage of the input power into output power, reducing waste heat and improving the overall efficiency of the power supply.
Cons of buying LM7912CK Negative Voltage Regulator:1. Low Output Current: The LM7912 can only deliver up to 1.5A of output current, which may not be sufficient for high-power applications.
2. Bulkiness: The LM7912 is a linear regulator, which means it requires a heat sink to dissipate the heat it generates. This can make it bulky and take up more space than a switching regulator.
3. Inefficiency at Low Loads: Linear regulators like the LM7912 are less efficient at regulating voltage at low loads, as they continuously drop voltage to maintain output voltage, even when the output current is low.
Conclusion:The LM7912 is a reliable and widely-used linear voltage regulator that is suitable for applications that require a low noise output and can handle a wide input voltage range. However, its low output current, bulkiness, and inefficiency at low loads may make it less suitable for high-power applications or applications that require a small form factor.
Recommendation:If you require a linear voltage regulator with a low noise output and a wide input voltage range, the LM7912 could be a good choice. However, if you require a higher output current or a smaller form factor, you may want to consider using a switching regulator instead. It's always a good idea to review the specifications of the device and compare it with your application requirements before making a purchase.
New old stock nos item with some shelf wear. Qty 1 LM7912CK fixed negative voltage regulator to 3 LM7912 National Semiconductor.