DC2716A: 24V @ 1.6A, 4.5 ~ 20V in Boost

Demo circuit 2716A features the LT8364 in boost configuration. It is designed to convert a 4.5V to 20V source to 24V, with up to 1.6A, depending on input voltage, with a switching frequency of 2MHz. The LT8364 can operate with inputs as high as 60V, however, in this demo circuit, the input is limited by the level of the output voltage. Refer to Figure 4 for load current versus input voltage. The demo board contains a selectable jumper, JP1, to aid in the selection of the desired Sync pin mode of operation. The default setting is Burst Mode® operation. The data sheet gives a complete description of the device, operation and application information. The data sheet must be read in conjunction with this demo manual.

The LT®8364 is a current mode DC/DC converter with a 60V, 4A switch operating from a 2.8V to 60V input. With a unique single feedback pin architecture it is capable of boost, SEPIC or inverting configurations. Burst Mode operation consumes as low as 9µA quiescent current to maintain high efficiency at very low output currents, while keeping typical output ripple below 15mV. An external compensation pin allows optimization of loop bandwidth over a wide range of input and output voltages and programmable switching frequencies between 300 kHz and 2 MHz. A SYNC/MODE pin allows synchronization to an external clock. It can also be used to select between burst or pulse-skip modes of operation with or without Spread Spectrum Frequency Modulation for low EMI. For increased efficiency, a BIAS pin can accept a second input to supply the INTVCC regulator. Additional features include frequency foldback and programmable soft-start to control inductor current during startup.