LM4040CEX3-3.3+T

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The LM4040CEX3-3.3+T is designed for applications requiring high voltage accuracy, such as miniature battery management systems, personal healthcare devices, and precision power supplies. The device also features a low dynamic output resistance, making it suitable for high voltage output ripple reduction applications. Its small SOT-23 package and low power consumption make it ideal for low-power applications.

The LM4040CEX3-3.3+T operates from a voltage supply of 1.2V to 5.5V and it can source up to 20mA of current. It offers an accurate output voltage with a temperature coefficient of 40ppm/°C and a dynamic output resistance of 35mΩ typical. It has an input offstate leakage current of 2.5nA typical, making it ideal for low power applications.

The working principle of the LM4040CEX3-3.3+T is based on a low-dropout voltage reference with bandgap voltage reference core. An internal NPN transistor is buffered in series with the references core and provides the necessary current to make the reference voltage stable. The setpoint voltage is set by an external resistor divider and the output is trimmed over the temperature range of –40 to 125°C. This ensures that the reference voltage is extremely accurate and stable over the entire temperature range.

The LM4040CEX3-3.3+T is ideal for applications requiring extremely accurate 3.3V reference voltages with low output noise, high stability and low temperature coefficient. It is particularly suitable for applications such as miniature battery management systems, personal healthcare devices, and precision power supplies. The device also features a low dynamic output resistance, making it suitable for high voltage output ripple reduction applications.

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