Various sc1104 free download

File name sc1104.pdf

SC1104A/B Simple, Synchronous Voltage Mode PWM Controller POWER MANAGEMENT Description Features The SC1104A/B is a versatile voltage-mode PWM con- Up to +14V input, 300kHz operation (SC1104A) troller designed for use in single ended DC/DC power Up to +7V input, 600kHz operation (SC1104B) supply applications. A simple, fixed frequency high effi- High efficiency (>90%) ciency buck regulator can be implemented using the 1% Reference voltage accuracy SC1104A/B with a minimum of external components. Hiccup mode over current protection Internal level shift and drive circuitry eliminates the need Robust output drive for an expensive P-channel, high-side switch. The small device footprint allows for compact circuit design. RDS(ON) Current sensing Industrial temperature range SC1104A/B features include temperature compensated 8-Lead SOIC package. Pb-free package available, voltage reference, triangle wave oscillator, current limit fully WEEE and RoHS compliant comparator and an externally compensated error ampli- fier. Current limit is implemented by sensing the voltage Applications drop across the top FET's RDS(ON). Termination supplies The SC1104 operates at fixed frequencies of Low cost microprocessor supplies 300kHz(A) or 600kHz(B) providing an optimum com- Peripheral card supplies promise between efficiency, external component size, Industrial power supplies and cost. 600kHz switching frequency is reserved for High density DC/DC conversion the SC1104B, +5VCC operation only. SC1104A/B has a thermal protection circuit, which is activated if the junction temperature exceeds 150