Analog Devices Inc. DC2937A Demo Circuit for LT8357

Analog Devices Inc. DC2937A Demo Circuit for LT8357 features the LT8357 as a 360kHz low I_Q, high power boost converter with a 48V output from 10V to 40V input. This demonstration circuit features spread spectrum frequency modulation (SSFM) and split gate driver pins for the high power, high voltage switch. The converter has a very low quiescent current, ideal in automotive and other battery-powered applications when placed in shutdown. This demonstration circuit offers a low quiescent current with pulse-skipping and Burst Mode® operation as jumper selections.

The Analog Devices Inc. LT8357 boost controller IC operates over an input range of 3V to 60V, suitable for automotive, telecom and industrial applications. It also exhibits a low quiescent current of 8μA, making it ideal for battery-operated systems. It drives a low-side N-channel power MOSFET with a 5V split gate drive. The controller provides adjustable and synchronizable operation from 100kHz to 2MHz. At light load, either pulse-skipping or low-ripple Burst Mode operation can be selected to improve efficiency. It also packs many popular features such as soft-start, input undervoltage lockout, adjustable frequency, and clock synchronization. PGOOD indicates when the output voltage is in regulation.