LT1577 Datasheet | Linear Technology

LT1575/LT1577 Ultrafast Transient Response, Low Dropout Regulators Adjustable and Fixed Features s s s 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 transientload 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 acmodate any required microprocessor power supply voltage. Selection of the N-channel MOSFET RDS(ON) allows very low dropout voltages to be achieved. Unique protection Features include a high side current limit amplifier that activates a fault protection timer circuit. A multifunction Shutdown pin provides either current limit time-out with latchoff, overvoltage protection, thermal shutdown or a bination of these functions. The LT1575 is available in 8-pin SO or PDIP and the LT1577 is available in 16-pin narrow body SO. , LTC and LT are registered trademarks of Linear Technology Corporation. Ultra Fast is a trademark of Linear Technology Corporation. Pentium is a registered trademark of Intel Corporation. Power PC is a trademark of IBM Corporation. s s s U APPLICATIONS s s s s s Ultra Fast TM Transient Response Eliminates Tantalum and Electrolytic Output Capacitors FET RDS(ON) Defines Dropout Voltage 1% Reference/Output Voltage Tolerance Over Temperature Typical Load Regulation: 1m V High Side Sense Current Limit Multifunction Shutdown Pin with Latchoff Pentium® Processor Supplies Power PCTM Supplies 5V to 3.XXV or 3.3V to 2.XXV Microprocessor Supplies GTL Termination Low Voltage Logic Supplies Adjustable 1.5V Fixed 2.8V Fixed 3.3V Fixed 3.5V Fixed 5V Fixed Adjustable, Adjustable 3.3V Fixed, Adjustable 3.3V Fixed, 2.8V Fixed LT1575CN8/LT1575CS8 LT1575CN8-1.5/LT1575CS8-1.5 LT1575CN8-2.8/LT1575CS8-2.8...