Split Rail Linear Power Supply

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Split rail linear power supply.

This results in the load current of both regulators to be equal in magnitude. The input supply voltage range is suitable for use with lithium ion batteries or from a fixed 3 3 v supply. The fly buck method is a more complex technique. This document outlines a step by stepmethod for designing the split rail power supply.

Only the ref3318 is available with a 1 8v output so it could be used. Splitting a rail using the voltage reference will often mean compromising a bit on the symmetry of the split for example if a 3v3 rail is to be split then the closest would be to use the 1 8v output reference which gives a 1 8 1 5v asymmetrical supply. I thought it would be interesting to do a theory video on linear power supply design. White vinyl 3 rail diamond fence panel with 3 rails post and cap.

For step by step details see the application report creating a split rail power supply with a wide input voltage buck regulator charge pumps are a popular and easy way of inverting positive rails. The tps65133 is designed to supply any system requiring 5 0 v supply rails. Figure 2 is a plot of the input current versus the output current for the circuit in figure 1. In a split voltage power supply application the analog circuit is connected between the positive voltage rail and the negative voltage rail.

Each output can supply up to 250 ma of output current. The positive supply rail is created from a standard off the shelfcoupled inductor from coilcraft.