L4955

The L4955 is a family of monolithic ultra very low drop linear regulators designed to supply the most recent microprocessors.

The dropout voltage is only 0.75V (Typ.) at 5A, directly dependent on the output current conditions.

Realized in BCDII technology, L4955 has on board a charge pump to properly drive an N-channel power mos Transistor with 150m of R_DSON.

L4955 operates from a 4.5V minimum supply, with a very low quiescent current irrespective of the load; a minimum of 22F output capacitor is required for stability.

The on-chip trimming techniques improve the precision of the available output voltages to ±2%.

Ancillary functions like power good, inhibit with low power consumption, programmable output voltage and current limiting make the flexible heptawatt version usable in applications where power management, stand-by, features, post regulation and adjustable current generators for battery chargers are important.