DESCRIPTION
The LT®1575/LT1577 are single/dual controller ICs that drive low cost external N-channel MOSFETs as source followers to produce ultrafast transient response, low dropout voltage regulators.
The LT1575/LT1577 achieve unprecedented transient load performance by eliminating expensive tantalum or bulk electrolytic output capacitors in the most demanding modern microprocessor applications. Precision-trimmed adjustable and fixed output voltage versions accommodate any required microprocessor power supply voltage. Selection of the N-channel MOSFET RDS(ON) allows very low dropout voltages to be achieved.

FEATURES
■ UltraFastTM Transient Response Eliminates Tantalum and Electrolytic Output Capacitors
■ FET RDS(ON) Defines Dropout Voltage
■ 1% Reference/Output Voltage Tolerance Over Temperature
■ Typical Load Regulation: 1mV
■ High Side Sense Current Limit
■ Multifunction Shutdown Pin with Latchoff

APPLICATIONS
■ Pentium® Processor Supplies
■ PowerPCTM Supplies
■ 5V to 3.XXV or 3.3V to 2.XXV Microprocessor Supplies
■ GTL Termination
■ Low Voltage Logic Supplies