LP5900SD-2.7/NOPB

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The LP5900SD-2.7/NOPB is a low-power high-performance 300mA low-dropout linear regulator (LDO). It is a member of the LP5900 family of ultra-low-power, low-input voltage LDO voltage regulators. This device is designed to deliver ultra-low power consumption in applications where power efficiency and battery life are the highest priorities. The LP5900 devices feature low-dropout operation and low quiescent current for excellent power saving performance. The device is also well suited for compensated systems, such as transmitters, since its wide operating temperature range allows for forced air cooling.

The LP5900SD-2.7/NOPB voltage regulator can operate from an input voltage of 2.7V to 5.5V and provides a regulated output of 2.7V with a maximum output current of 300mA. It features an ultra-low dropout voltage of only 45mV at full load conditions. The LP5900SD-2.7/NOPB is designed for low noise applications, with a low noise voltage of 37µVrms. The device also includes an enable pin which can be used to enable or disable the regulator. The enable pin can be driven by a digital signal or by a resistive pull up configuration. The LP5900SD-2.7/NOPB is available in an industry-standard SOT23-5 package.

The working principle of the LP5900SD-2.7/NOPB is simple. The device operates as an adjustable linear voltage regulator that adjusts its output voltage to the set point of the Adjust pin by comparing the feedback voltage, which is sourced from the output, to an internal reference voltage. The output voltage is controlled by a signal from the Adjust pin that is buffered, amplified, and then compared to an internal reference voltage. The signal from the Adjust pin is applied to the error amplifier and passes through an internal compensation network to stabilize system performance. The output is then regulated depending on the value of the feedback voltage from the output and the reference voltage.

The LP5900SD-2.7/NOPB is well suited for low power, battery-operated applications. Examples include medical and consumer electronics devices, such as personal digital assistants, small computing platforms, digital cameras, portable navigation devices, and CD players. Its wide operating temperature range allows for forced-air cooling, while its low-noise performance allows for low-noise applications. The LP5900SD-2.7/NOPB is a highly efficient linear voltage regulator that can help prolong battery life by providing low power consumption and improved power efficiency.

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