A constant-frequency, leading edge modulation, voltage mode line feed forward architecture provides a selectable fixed or phase-lockable (PLL) frequency from 250kHz to 1MHz. Output current sensing is accomplished by monitoring the current in both the top-side and bottom-side MOSFET, allowing cycle-by-cycle control of the inductor current. In addition, the LTC3775 has adjustable soft-start to control the turn-on time and manage inrush current. Selectable pulse skip mode or forced continuous mode is user controlled to optimize light load efficiency. The LTC3775 features a precision 0.6V reference with an accuracy of ±0.75% over a -40ºC to 125ºC operating temperature range.
The LTC3775 is available in a thermally enhanced 3mm x 3mm QFN-16 package. The LTC3775E operates from -40ºC to 85ºC with the 1000-piece price starting at $1.79 each. The LTC3775I industrial grade version operates from -40ºC to 125ºC, with a 1,000-piece price that starts at $2.09 each. Both versions are available from stock. For more information, visit www.linear.com.