LX8384A-15CP

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LX8384A-15CP, belonging to Power Management Integrated Circuits (PMIC), is one of the special purpose voltage regulator designed by Microsemi Corporation. It contains a hybrid control loop with feed forward path and current error amplifier, a voltage reference circuit and loop filter, enabling high efficiency, high frequency, and fast transient response; thus, achieving a wide range of adjustable output voltages (from 1.25V to 15V).

Designers usually choose the LX8384A-15CP when applications such as computing, storage, communications and supercomputing require moderate to high power density, low blue noise, and high efficiency. The high efficiency is among the highest in the market, due to the low quiescent current value of 3.3uA and the low dropout voltage of 0.47mV, therefore, less energy is dissipated into the device as heat, making it suitable for low-power applications.

The LX8384A-15CP has a wide input voltage range from 1.2V to 10V, making it one of the most suitable voltage regulator for low-voltage, high-current applications such as IOT and other internet connected devices. The low quiescent current feature and the miniaturized 16-pin QFN form factor, make it an ideal and compact solution to help electronic architects turn their visionary designs into efficient realities.

A key feature of the LX8384A-15CP is the integrated feed forward path which enables fast transient response (the ability to react very quickly to sudden changes in input voltage or load) and high performance in both line and load transients. The feed forward path consists of a series of internal current mirrors, resistors and a voltage reference, which enables the output voltage to track the input voltage in response to sudden change in current.

Besides the active feed forward path, the internal current error amplifier, which measures the output voltage of the regulator and compares it to the reference voltage, is also used to provide fast and accurate regulation of the output voltage by allowing the LX8384A-15CP to respond quickly to changes in input or load current.

The voltage reference circuit in the LX8384A-15CP is also designed to ensure a high level of accuracy and stability while providing fast transient recovery time. The voltage reference circuit consists of a self-biased band gap voltage reference, which is stabilized by a proprietary architecture that results in a startup accuracy of +/-1% and very low temperature variations.

The LX8384A-15CP also contains a compensator loop, or loop filter, which helps to ensure low noise performance and high efficiency. The loop filter is made up of an RC network that serves as a low-pass filter and is designed to eliminate high frequency oscillations in the control loop. This enables the device to maintain its set voltage with minimal current ripple, and reduce output noise by eliminating high frequency oscillations.

In summary, the LX8384A-15CP, a special purpose voltage regulator from Microsemi Corporation, features a unique combination of hybrid control loop, feed forward path and current error amplifier, a highly accurate and stable voltage reference circuit, and a loop filter which ensures low noise and high efficiency, making it an ideal solution for applications such as IOT, computing, storage, and supercomputing requiring moderate to high power density.

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