LTC3542-1

The LTC®3542-1 is a high effi ciency, fi xed output voltage of 2.8V, monolithic synchronous buck converter using a constant frequency, current mode architecture. Supply current during operation is only 26A, dropping to <1A in shutdown. The 2.5V to 5.5V input voltage range makes the LTC3542-1 ideally suited for single Li-Ion battery-powered applications. 100% duty cycle provides low dropout operation, extending battery life in portable systems. Internal power switches are optimized to provide high effi ciency and eliminate the need for an external Schottky diode.

Switching frequency is internally set at 2.25MHz, allowing the use of small surface mount inductors and capacitors, and it can synchronize to an external clock signal with a frequency range of 1MHz to 3MHz through the MODE/SYNC pin. The LTC3542-1 is specifi cally designed to work well with ceramic output capacitors, achieving very low output voltage ripple and a small PCB footprint.

The LTC3542-1 can be confi gured for the power saving Burst Mode® Operation. For reduced noise and RF interference, the MODE/SYNC pin can be confi gured for pulse skipping operation