LinearPi Pro high-current ultra-low noise Linear power supply full SMT

Introduction

LinearPi Pro is a new generation top-quality high current ultra-low noise audiophile grade linear power supply. It can deliver up to 5A continuous output current at extremely low-noise level which is much suitable for Raspberry Pi 5 and other high current noise sensitive applications. It could be the best linear power supply solutions for both digital and analog audio applications.

Multiple LinearPi Pros can be grouped into a big power supply system. LinearPi Pro can also be upgraded to an 5V/3.3V ultra capacitor power supply by integrating with UcConditioner/Pro for even lower noise performance.

LinearPi Pro New Features

• 5A high continuous output current.
• 2.5 mOhm ultra-low output impedance.
• New parallel power output stages architecture.
• 4 layers double copper thickness PCB for higher current density and additional shield layers.
• 29080 uF total filtering capacitance.
• Enhanced Kelvin sense input to lower the output impedance and improve performance.
• Actual noise level superior to LinearPi MkII because of the shield layer and the new parallel architecture.
• New low drop high speed high current soft recovery Schottky rectifiers.
• Bigger size heatsink

Other Specifications and Highlighted Features

• 0.8uV Ultra-low noise level.
• Built-in ON/OFF control logic with on-board or possible external ON/OFF control switch.
• Multiple LinearPi Pros can be grouped into a big power supply system by making use of the built-in isolated master/slave on-off control signal chain.
• Seamlessly integrates with UcConditioner/Pro to be upgraded to an ultracapacitor power supply.
• Optimized for continuous AC input mode to get best possible sound quality.
• Deal with MLCC piezoelectric effect noise.
• 5V, 3.3V and 12V configurations.
• Two stages ultra-low noise soft start up feature great for both digital and analog application.
• Fully SMT high-quality heavy-duty design.

Great Load Transient Response Measurement Result

Real measurement shows that the LinearPi Pro has a super great load transient response performance. The output voltage drop is only 10mV at ultra-low noise level when output current changes over very big steps between 1A to 5A. The actual dynamic output impedance is only 2.5mOhm (@1kHz), which could be the best performance among all the low-noise linear power supplies in the market.

Load current steps: 1A to 5A,  Output voltage: 5V
Frequency: 1kHz, Duty cycle: 50%, Probe: 1:1, 10mV/DIV

Upgrade with a UcConditioner Pro to make an even more improvement to the low-noise performance

It’s highly recommended to enable the enhanced Kelvin sensing function when working with a UcConditioner Pro

Difference between LinearPi MkII

Transformer recommendation chart

User's manual

Dimensions and other documents

External ON/OFF switch (optional, sold separately)

Note: To use an external on/off switch, the on-board on/off switch must be kept at off position.