Analog Devices LT8495 | Demoboard DC2205A

Description

Demonstration circuit 2205A is a monolithic SEPIC converter featuring LT®8495. The demo board is designed for 5V output from a 3V to 60V input at 450kHz switching frequency. The max output current is 1A when the inputvoltage is above 12V, and is reduced with lower input voltage. The LT8495 is a monolithic switching regulator with a power-on reset and watchdog timer. Quiescent current can be less than 9μA when operating. Dual supply pins (VIN and BIAS) allow the part to automatically operate from the most efficient supply.The switching regulation, watchdog timer and reset detection functions are controlled by the SWEN, WDE and RSTIN respectively. The reset and watchdog timeout periods are independently adjustable using external capacitors C5 and C6. The watchdog timer is enabled by default on the demo board, and it can be disabled by moving the JP1 to GND.Low Ripple Burst Mode® operation increases the efficiency at the light load while keeping the output ripple below 10mV. Figure 1 shows the demo board efficiency at 12V input voltage. Figure 2 shows the max load current with different input voltages of the demo board.The LT8495 data sheet gives a complete description of the part, operation and application information. The data sheet must be read in conjunction with this demo manual for demo circuit 2205A. The LT8495 is assembled in a 20-lead plastic TSSOP package. Proper board layout is essentialfor maximum thermal and electrical performance. See the data sheet sections for details.

More information

• Datasheet
• IC product information