LT1676

The LT ^(R)1676 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 offers excellent dynamic input supply rejec- tion and short-circuit protection.

The LT1676 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 LT1676 switch circuitry is also load depen- dent.  At medium to high loads, the output switch circuitry maintains high rise time for good efficiency.  At light loads, rise time is deliberately reduced to avoid pulse skipping behavior.

The available SO-8 package and 100kHz switching fre- quency allow for minimal PC board area requirements.