DC1451A

DC1451A demonstration circuit is a buck-boost DC/DC converter featuring the LTC3127EDD and is ideally suited for pulsed load applications where the input current needs to be limited. Demonstration circuit 1451A is configured for 1.0A maximum input current limit and can handle pulsed load currents of up to 2A, with duty cycles of up to 15%. The input voltage range is 1.8-5.5V. The fixed input current limit can be adjusted by replacing one resistor (R6). The Demonstration Circuit has been set up with storage capacitors to supply a 2A pulsed load while allowing VOUT to droop approximately 200mV while the input current is limited. Space is provided, and alternate part footprints have been built into the PCB to allow experimentation with larger capacitors for more energy storage.

• 3.8V output voltage
• Average Iin limited to 1.0A
• 1.0A output current for VIN =5.0V
• 90% at VIN=3.3V, IOUT = 0.5A efficiency