LP2981IM5-4.0/NOPB

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LP2981IM5-4.0/NOPB is a low dropout linear voltage regulator manufactured by Texas Instruments. It has been designed specifically for applications requiring a low quiescent current voltage regulator that can operate from an input voltage of 4.0V to 16.0V and provide an output voltage ranging from 1.25V to 15.0V. The LP2981IM5-4.0/NOPB is optimized for selectable regulators with low quiescent current, and eliminates the need for secondary winding. It offers a very low dropout voltage value at only 375mV while providing up to 150mA of output current.

The LP2981IM5-4.0/NOPB is ideal for battery powered applications due to its low quiescent current of only 12uA at 3.0V output and 175uA at a 12V output. In addition to its low quiescent current characteristics, the regulator features exceptional load and line regulation with excellent temperature stability and low noise operation. It also offers temperature protection, over current protection, short circuit protection and over voltage protection.

The LP2981IM5-4.0/NOPB has a shutdown range from 0.2V to 1.5V and dropout voltage of 0.375V. The resistor tolerance for the reference voltage is 0.5% for outputs from 2.5V to 13.5V and 1.0% for outputs up to 15V. The PSS pin can be used to adjust the output voltage, allowing for further flexibility in regulating the output voltage. The maximum operating temperature range of the chip is -40°C to +125°C.

The LP2981IM5-4.0/NOPB is a linear voltage regulator, with a cascoded reference design. This configuration provides a stable Vfb = Vout/131, and allows for a lower Vdss compared to many other low dropout regulators. The Vdss is 375mV @ 3.5V output and 500mV to 700mV @ 5.0V output. The quiescent current can be set by adjusting the voltage on the PSS pin.

The cascoded reference design enables a high degree of temperature stability and accuracy over a wide temperature range. The LP2981IM5-4.0/NOPB has a temperature coefficient of 0.06%/°C. This impressive accuracy and stability ensures a low variance in the regulated voltage over a wide range of temperatures.

The LP2981IM5-4.0/NOPB has several useful features including over-voltage and over-current protection. The over-voltage protection prevents the output voltage from reaching dangerously high levels while the over-current protection is used to protect the regulator from excessive load conditions. Both of these protective features help to ensure the regulator works reliably over a wide range of conditions.

In summary, the LP2981IM5-4.0/NOPB is an excellent low dropout linear voltage regulator, providing an outstanding combination of high accuracy and low quiescent current. It is ideal for battery powered applications and other low current, low voltage applications. The regulator offers excellent stability, temperature protection, over current protection and over voltage protection, making it a reliable and flexible power solution.

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