ANALOG DEVICES EVAL-LT8333-BZ Evaluation Board, LT8333RDD#PBF, Boost / Inverting / SEPIC Converter

EVAL-LT8333-BZ evaluation circuit features the LT®8333 in a boost configuration. It operates with a switching frequency of 2MHz and is designed to convert a 4.5V to 20V source to 24V output. The converter can output up to 2A depending on the input voltage. This evaluation circuit features Spread-Spectrum Frequency Modulation (SSFM) and EMI filters to provide optimum EMI performance. This PCB layout is optimized for good EMI performance and small solution size. The evaluation board contains a selectable jumper, JP1, to aid in the selection of the desired SYNC pin mode of operation. At light load, either pulse-skipping (PULSE SKIP) or low-ripple Burst Mode® operation (BURST) can be selected to improve the efficiency. The LT8333 boost/SEPIC/inverting converter IC operates over an input range of 2.8V to 40V, suitable for automotive, telecom, and industrial applications. The converter provides adjustable and synchronizable operation from 300KHz to 2MHz with SSFM option.

• 40mV typical output voltage ripple at VIN = 12V, VOUT = 24V, IOUT = 1.1A (measured at C2)
• 1.5A maximum output current at OUT = 24V, VIN = 16V
• 2MHz to 2.4MHz switching frequency (fSW) range at R5 = 20.0Kohm, SSFM ON
• 95% typical efficiency (with EMI filters) at VIN = 16V, VOUT = 24V, IOUT = 1.5A
• 1.22mA zero load quiescent current (VOUT = 24V)