STMicroelectronics L4975A Manuals

The L4975A is a stepdown monolithic power switching regulator delivering 5A at a voltage vari- able from 5.1 to 40V. Realized with BCD mixed technology, the device uses a DMOS output transistor to obtain very high efficiency and very fast switching times. Features of the L4975A include reset and power fail for mi- croprocessors, feed forward line regulation, soft start, limiting current and thermal protection. The device is mounted in a 15-lead multiwatt plastic power package and requires few external compo- nents. Efficient operation at switching frequencies up to 500KHz allows reduction in the size and cost of external filter components.

The L4975A is a 5A output current, 5.1V to 40V output voltage range, 0 to 90% duty cycle range step-down monolithic power switching regulator that has internal feed-forward line regulation, internal current limiting, precise 5.1V ± 2% on chip reference, reset and power fail functions, soft start, input/output sync pin, under voltage lock out with hysteretic turn-on, PWM latch for single pulse per PE-RIOD, very high efficiency, switching frequency up to 500KHz, thermal shutdown, continuous mode operation.