LT1776

The LT^®1776 is a wide input range, high efficiency Buck (step-down) switching regulator. The monolithic die in- cludes all oscillator, control and protection circuitry. The part can accept input voltages as high as 60V and contains an output switch rated at 700mA peak current. Current mode control delivers excellent dynamic input supply rejection and short-circuit protection.

The LT1776 contains several features to enhance effi- ciency. The internal control circuitry is normally powered via the V_CC pin, thereby minimizing power drawn directly from the V_IN supply (see Applications Information). The action of the LT1776 switch circuitry is also load depen- dent.  At medium to high loads, the output switch circuitry maintains fast rise time for good efficiency.  At light loads, rise time is deliberately reduced to avoid pulse skipping behavior.

The available SO-8 package and 200kHz switching fre- quency allow for minimal PC board area requirements.