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Solutions DC Regulator Solutions DC-DC Voltage Regulation Step Down DC-DC Solutions (Vin > Vout)
Solutions Power Management LDO Linear Regulators Positive Linear Regulators (LDO)
Solutions Power Management LDO Linear Regulators Extended Temperature (H & MP) Linear Regulators

DC1865A - LT3055EDD Demo Board | Micropower Linear Regulator, Precision Current Limit, Diagnostics, ±45V Input Voltages, 2.2V ≤ VIN ≤ 45V, Vout = 1.2V/1.5V/1.8V/2.5V/3.3V/5V @ 500mA

Demonstration circuit 1865A is an adjustable 500mA linear regulator featuring the LT®3055. The demo board allows input voltages up to ±45V. The input voltage range is 2.2V to 45V and the jumper selectable output voltage can be set to 1.2V, 1.5V, 1.8V, 2.5V, 3.3V, 5V or a user-defined value.

The LT3055 is a micropower (65µA no-load quiescent current), low noise and low dropout (350mV) voltage linear regulator. A 10nF bypass capacitor reduces output noise to 25μVRMS (10Hz to 100kHz bandwidth) and soft-starts the reference. The LT3055’s ±45V input voltage rating combined with its precision current limit and diagnostic functions make the IC an ideal choice for robust, high reliability applications. The LT3055 current limit can be programmed by a single resistor, and is accurate to ±10% over a wide input voltage and temperature range. Another resistor programs the LT3055’s optional minimum output current monitor, useful for detecting open-circuit conditions.

DC1865A - Schematic

 


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
  • 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

To explore other ready to run LTspice demonstration circuits, please visit our Demo Circuits Collection.

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