DC1434A - LT3071EUFD Demo Board | 5A, Low Noise, Digitally Prog Output, 85mV Dropout Linear Regulator, Analog Margining, 1.32V ≤ VIN ≤ 3V, Vout = 0.8V to 1.8V @ 5A

Demonstration circuit 1434 is an adjustable 5A linear regulator featuring the LT3071. The LT3071 is a low dropout voltage, UltraFast™ transient response linear regulator. The device supplies up to 5A of output current with a typical dropout voltage of 85mV. A 0.01μF reference bypass capacitor decreases output voltage noise to 25μVRMS. The LT3071’s high bandwidth permits the use of low ESR ceramic capacitors. Output voltage is digitally selectable in 50mV increments over a 0.8V to 1.8V range. The demo board has a 1.32V to 3V input voltage range and a 2.2V to 3.6V BIAS voltage range. An analog margining function allows the user to adjust system output voltage over a continuous ±10% range. To maintain proper performance and regulation, the BIAS supply voltage must be higher than the IN supply voltage. For a given VOUT, the BIAS voltage must satisfy the following conditions: 2.2 ≤ VBIAS ≤ 3.6V and VBIAS ≥ (1.25·VOUT+1V). For VOUT ≤ 0.95V, the minimum bias voltage is limited to 2.2V.

Software

LTspice

LTspice^® software is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice

To launch a ready to run LTspice demonstration circuit for this part:

Step 1: If you have not installed LTspice on this computer, download and install LTspice
Step 2: Once LTspice is installed, click on the link(s) below to launch the simulation
- LT3071 Demo Circuit - Programmable 85mV Dropout Linear Regulator (1.1-3V to 0.9V @ 5A)
Step 3: If LTspice does not automatically open after clicking the link above, you can instead run the simulation by right clicking on the link and selecting "Save Target As." After saving the file to your computer, start LTspice and open the demonstration circuit by selecting 'Open' from the 'File' menu

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