LT1117/LT1117-2.85 LT1117-3.3/LT1117-5 800mA Low Dropout Positive Regulators Adjustable and Fixed 2.85V, 3.3V, 5V FEATURES DESCRIPTION n Space Saving SOT-223 Surface Mount Package The LT 1117 is a positive low dropout regulator designed n 3-Terminal Adjustable or Fixed 2.85V, 3.3V, 5V to provide up to 800mA of output current. The device is n Output Current of 800mA available in an adjustable version and fixed output voltages n Operates Down to 1V Dropout of 2.85V, 3.3V and 5V. The 2.85V version is designed n Guaranteed Dropout Voltage at Multiple Current Levels specifically to be used in Active Terminators for the SCSI n 0.2% Line Regulation Max bus. All internal circuitry is designed to operate down to 1V n 0.4% Load Regulation Max input to output differential. Dropout voltage is guaranteed at a maximum of 1.2V at 800mA, decreasing at lower load currents. On chip trimming adjusts the reference/output APPLICATIONS voltage to within 1%. Current limit is also trimmed in n order to minimize the stress on both the regulator and the Active SCSI Terminators n power source circuitry under overload conditions. High Ef ciency Linear Regulators n Post Regulators for Switching Supplies The low pro le surface mount SOT-223 package allows the n Battery Chargers device to be used in applications where space is limited. The n 5V to 3.3V Linear Regulators LT1117 requires a minimum of 10F of output capacitance L, LT, LTC, LTM, Linear Technology, OPTI-LOOP and the Linear logo are registered trademarks for stability. Output capacitors of this size or larger are of Linear Technology Corporation. UltraFast is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. normally included in most regulator designs. Unlike PNP type regulators where up to 10% of the output current is wasted as quiescent current, the quiescent current of the LT1117 ows into the load, increasing ef ciency. TYPICAL APPLICATION Active Terminator for SCSI-2 Bus Dropout Voltage (V V ) IN OUT 1.4 40C T < 0C 110 J 1.2 110 0C T 125C J LT1117-2.85 1.0 110 18 TO 27 T = 25C J IN OUT LINES 0.8 GND T = 125C J + + 4.75V TO 110 10F 22F 0.6 5.25V 0.4 1117 TA01 0.2 INDICATES GUARANTEED TEST POINT 0 0 100 200 300 400 500 600 700 800 OUTPUT CURRENT (mA) 1117 TA02 1117fd 1 DROPOUT VOLTAGE (V)LT1117/LT1117-2.85 LT1117-3.3/LT1117-5 ABSOLUTE MAXIMUM RATINGS (Note 1) Input Voltage Operating JunctionTemperature Range Operating Voltage C Grade .................................................. 0C to 125C LT1117, LT1117-3.3, LT1117-5 .........................15V I Grade ...............................................40C to 125C LT1117-2.85 .....................................................10V Storage Temperature Range ...................65C to 150C Surge Voltage Lead Temperature ....................(See Soldering Methods) LT1117, LT1117-3.3, LT1117-5 .........................20V PIN CONFIGURATION FRONT VIEW FRONT VIEW 3 IN 3 IN TAB IS TAB IS 2 OUT 2 OUT V OUT V OUT 1 ADJ/GND 1 ADJ/GND ST PACKAGE M PACKAGE 3-LEAD PLASTIC SOT-223 3-LEAD PLASTIC DD-PAK T = 125C, = 15C/W JMAX JC T = 125C, = 10C/W JMAX JC ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE LT1117CST PBF LT1117CST TRPBF 1117 3-Lead Plastic SOT-223 0C to 125C LT1117IST PBF LT1117IST TRPBF 1117I 3-Lead Plastic SOT-223 40C to 125C LT1117CST-2.85 PBF LT1117CST-2.85 TRPBF 11172 3-Lead Plastic SOT-223 0C to 125C LT1117IST-2.85 PBF LT1117IST-2.85 TRPBF 1117I2 3-Lead Plastic SOT-223 40C to 125C LT1117CST-3.3 PBF LT1117CST-3.3 TRPBF 11173 3-Lead Plastic SOT-223 0C to 125C LT1117IST-3.3 PBF LT1117IST-3.3 TRPBF 1117I3 3-Lead Plastic SOT-223 40C to 125C LT1117CST-5 PBF LT1117CST-5 TRPBF 11175 3-Lead Plastic SOT-223 0C to 125C LT1117IST-5 PBF LT1117IST-5 TRPBF 1117I5 3-Lead Plastic SOT-223 40C to 125C LT1117CM PBF LT1117CM TRPBF LT1117CM 3-Lead Plastic DD-PAK 0C to 125C LT1117CM-2.85 PBF LT1117CM-2.85 TRPBF LT1117CM-2.85 3-Lead Plastic DD-PAK 0C to 125C LT1117CM-3.3 PBF LT1117CM-3.3 TRPBF LT1117CM-3.3 3-Lead Plastic DD-PAK 0C to 125C LT1117CM-5 PBF LT1117CM-5 TRPBF LT1117CM-5 3-Lead Plastic DD-PAK 0C to 125C 1117fd 2