L4970A
The L4970A is a stepdown monolithic power
switching regulator delivering 10A at a voltage
variable 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 L4970A include reset and power fail for microprocessors, 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 components. Efficient operation at switching frequencies
up to 500KHz allows reduction in the size and
cost of external filter components.
L4978D
The L4978 is a step down monolithic power
switching regulator delivering 2A at a voltage between 3.3V and 50V (selected by a simple external
divider). Realized in BCD mixed technology, the
device uses an internal power D-MOS transistor
(with a typical Rdson of 0.25?) to obtain very high
efficency and high switching speed
