DESCRIPTION

The L4956 is an adjustable monolithic linear regulator designed to satisfy very heavy load transient and efficient power conversion from 3.3V to 1.26V and lower, up to 5A.

Designed in BCDII technology, it uses a charge pump technique to have a proper internal N-channel gate drive. The signal supply voltage input VSIG can operate from 4.5V up to an absolute of 7V and the power supply voltage input VPW can opearte from 3V min to an absolute of 7V. An RDSON of 150mV gives a voltage drop of 750mV at 5A of load current.

■ SPLITTED SUPPLY VOLTAGE FOR IM PROVED EFFICIENCY:

   - VPW: 3V MIN. POWER SUPPLY VOLTAGE

   - VSIG: 4.5VMIN. SIGNAL SUPPLY VOLTAGE

■ 5A OUTPUT CURRENT

■ FAST LOAD TRANSIENT RESPONSE

■ 0.75V TYP. DROP OUT VOLTAGE AT 5A

■ INHIBITWITHZEROCURRENT COMSUMPTION

■ POWER GOOD

■ SHORT CIRCUIT PROTECTION

■ THERMAL SHUTDOWN

■ HEPTAWATT PACKAGE

APPLICATIONS

■ PENTIUM™ AND POWER PC™ SUPPLIES

■ LOW COST SOLUTION FOR 3.3V TO 1.5V CONVERSION

■ SUITABLE FOR APPLICATIONS WITH STAND BY FEATURE