Elete launched for lithium battery powered applications DC/DC converter

Corporation (Linear Technology), DC/DC constant frequency current mode buck LTC3772 controller to release a DFN with 2 * 3mm and 8 pin thin ThinSOT package. The new device uses 2.75V to 9.8V input voltage operation, can provide a voltage as low as 0.8V, the maximum output current of 5A, it is suitable for single core and dual core lithium ion battery powered applications. Its No RSENSE architecture eliminates the need to use a current sense resistor, thereby increasing efficiency and saving board space.

LTC3772 will automatically switch to burst mode at light load (Burst Mode) operation, in order to improve the efficiency at low output current. In the case of no load, only 40 A of quiescent current. And has an integrated under voltage lockout function, can be closed when the input voltage is lower than 2V. In order to get the longest battery power supply time, the external P channel MOSFET in the linear buck mode continues to open (100%). The switching frequency of the 550kHz allows the designer to use small inductors and capacitors. In addition, the internal software smoothing mechanism can increase the output voltage from zero to zero.

LTC3772EDDB ultra-thin (0.75mm) 2 x 3mm DFN-8 package, off the shelf. The LTC3772ETS8 uses a 8 pin ThinSOT package. 1000 piece set, the starting price was $1.85 (for reference).