EVAL-LT8604-AZ - Schematic2/26/2021
Demonstration circuit EVAL-LT8604-AZ features the LT8604, a high efficiency 42V, 120mA synchronous stepdown regulator in 10-Lead 3mm × 2mm side-wettable DFN package. The demo board is designed for 120mA at 5V output from a 5.9V to 42V input, with switching frequency of 0.7MHz. The wide input range allows a variety of input sources, such as automotive batteries and industrial supplies.
The LT8604 is a compact high efficiency, and high frequency synchronous monolithic step-down switching regulator. The regulator is featured with ultralow 2.5μA quiescent current with the output in full regulation, making it an ideal solution for applications requiring highest efficiency at very light load currents, such as automotive and battery powered portable instruments.
Peak current mode control with minimum on-time of as small as 35ns allows high step-down conversion even at high frequency. The LT8604 switching frequency can be programmed via an oscillator resistor over a 200kHz to 2.2MHz range. The default frequency of the evaluation board is 700kHz.
The demo board has an EMI filter installed. The EMI performance of the board is shown on Figure 2 in the demo manual. The red line in Radiated EMI Performance is CISPR25 Class 5 peak limit. The figure shows that the circuit passes the peak limit test from 30MHz to 1GHz, with a wide margin.
The LT8604 data sheet gives a complete description of the part, operation and application information. The data sheet must be read in conjunction with the demo manual. The layout recommendations for best thermal performance are available in the data sheet Application Information section. Contact ADI applications engineer for technical support.
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.