LM337KCSE3

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The LM337KCSE3 is a adjustable precision three-terminal negative voltage regulator which is capable of supplying in excess of 1A of output current. It is designed to provide a constant negative output voltage in applications where a high degree of accuracy is required. The LM337KCSE3 is able to accurately regulate the absolute negative voltage at its output terminal. This device is suitable for voltage conversion between applications requiring a negative supply and one powered from a positive supply. The LM337KCSE3 has a dual-operating temperature range and each of these ranges (rated at -25 to -65°C for the LM337KC and -0 to -70°C for the LM337KSE3) is also tested at the military temperature range from -55°C to 125°C.

Application Field of LM337KCSE3

The LM337KCSE3 is ideal for applications such as negative voltage generation, voltage regulation, and voltage conversion. It is particularly useful in environments that require high accuracy and robust performance. Some typical applications include:

• Battery management systems
• Uninterruptible power supplies (UPSs)
• Integrated batteries or supercapacitors
• LCD backlight supply
• Extended temperature range systems
• Industrial power supplies
• Automotive and ground mobile systems
• Converters for systems with multiple power sources
• Powered backplane and signal translation systems
• Bench and laboratory supplies

Working Principle of LM337KCSE3

The LM337KCSE3 consists of three terminals; the input, ground, and output. It requires an input voltage that is approximately 2.5V higher than the output. The device operates in the linear region of operation when the output voltage is set by a resistive voltage divider connected between the output and the adjust terminal. The device is able to maintain the output voltage with variations in load current, power supply, and temperature. The LM337KCSE3 is fabricated using advanced BiCMOS technology, which ensures high accuracy of the output voltage. This device also has very low supply current, and it is capable of operating over extended temperature ranges.

The LM337KCSE3 output negative voltage is determined by the following equation,

VO(NEG)=-(VREF*R2)/R1

where VREF is the reference voltage, R1 is the resistor connected to the adjust terminal, and R2 is the resistor connected between the output terminal and the adjust terminal. By adjusting R1 and R2 it is possible to set the output voltage to different levels.

Conclusion

The LM337KCSE3 is a three-terminal adjustable precision negative voltage regulator suitable for use in applications requiring high accuracy. It has a wide operating temperature range and it is capable of producing a stable output voltage of up to 1A. With its advanced BiCMOS technology, this device is able to accurately regulate the negative output voltage while consuming a low quiescent current. Applications such as battery management systems, uninterruptible power supplies, and DC/DC converters are excellent candidates for using the LM337KCSE3.

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