Product Details

Demonstration circuit 3138A is a dual output step-down DC/DC converter that operates over a 12V to 36V input voltage range. It provides two outputs of 5V at 15A and 12V at 10A, and features the LTC7805 dual output synchronous step-down controller.

Key features of this board include:

  • FREQUENCY jumper for spread spectrum or external clock
  • EXTVCC jumper to use VOUT2, EXTVCC, or other derived VCC
  • MODE jumper that allows the converter to run in FCM, pulse-skipping, or Burst Mode® operation
  • PGOOD signals for each output

The two channels can be paralleled for higher output current. See the data sheet for more information on setting up the board for paralleling the two outputs.

The LTC7805 data sheet gives a complete description of the device, its operation and application information. The data sheet must be read in conjunction with the demo manual prior to working on or modifying demo circuit 3138A.

Applicable Parts

Documentation & Resources


Pricing displayed is based on 1-piece.

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.