description
the l5973d is a step down monolithic power switching
regulator with a minimum switch current limit of
2.5a so it is able to deliver more than 2a dc current
to the load depending on the application conditions.
the output voltage can be set from 1.235v to 35v.
the high current level is also achieved thanks to an
so8 package with exposed frame, that allows to reduce
the rth(j-amb) down to approximately 40°c/w
the device uses an internal p-channel d-mos transistor
(with a typical rdson of 250mw) as switching
element to minimize the size of the external components.
an internal oscillator fixes the switching frequency at
250khz.
having a minimum input voltage of 4.4v only, it is
particularly suitable for 5v bus, available in all computer
related applications.
pulse by pulse current limit with the internal frequency
modulation offers an effective constant current
short circuit protection.