LT1585A Datasheet | Linear Technology

LT1585A/LT1585A-3.3 5A Low Dropout Fast Response Positive Regulators Adjustable and Fixed Features s s s s s s DESCRIPTION The LT ®1585A/LT1585A-3.3 are low dropout 3-terminal regulators with 5A output current capability. Design has been optimized for low voltage applications where transient response and minimum input voltage are critical. Similar to the LT1084 family, these regulators feature lower dropout voltage and faster transient response. These improvements make them ideal for low voltage microprocessor applications requiring a regulated 2.5V to 3.6V output with an input supply below 7V. Current limit is trimmed to ensure specified output current and controlled short-circuit current. On-chip thermal limiting provides protection against any bination of overload that would create excessive junction temperatures. The LT1585A/LT1585A-3.3 are available in the industry standard 3-pin TO-220 power package. , LTC and LT are registered trademarks of Linear Technology Corporation. Pentium is a registered trademark of Intel Corporation. Power PC is a trademark of IBM Corporation. Fast Transient Response Guaranteed Dropout Voltage at Multiple Currents Load Regulation: 0.05% Typ Trimmed Current Limit On-Chip Thermal Limiting Standard 3-Pin Power Package U APPLICATIONS s s s s s s Pentium® Processor Supplies Power PCTM Supplies Other 2.5V to 3.6V Microprocessor Supplies Low Voltage Logic Supplies Battery-Powered Circuitry Post Regulator for Switching Supply Adjustable 3.3V Fixed LT1585ACT LT1585ACT-3.3 TYPICAL APPLICATION 3.3V, 5A Regulator VIN ≥ 4.75V LT1585A-3.3 3.3V 5A C2- 10µF Dropout Voltage vs Output Current + INPUT/OUTPUT DIFFERENTIAL (V) C1 10µF + 1.3 1.2 1.1 1.0 0.9 0.8 0.7 0.6 0.5 0 OUTPUT CURRENT (A) LT1585A TA02 - REQUIRED FOR STABILITY 1585A TA01 NOTE: MICROPROCESSOR APPLICATIONS WITH LOAD TRANSIENTS OF 3.8A REQUIRE OUTPUT DECOUPLING CAPACITANCE >1300µF ON FIXED VOLTAGE PARTS TO ACHIEVE < 50m V OF DEVIATION FROM NOMINAL OUTPUT. CONSULT...