LT1118/LT1118-2.5 LT1118-2.85/LT1118-5 Low I , Low Dropout, Q 800mA, Source and Sink Regulators Adjustable and Fixed 2.5V, 2.85V, 5V Output FEATURES DESCRIPTION n Regulates While Sourcing or Sinking Current The LT 1118 family of low dropout regulators has the n Provides Termination for up to 27 SCSI Lines unique capability of maintaining output regulation while n 600A Quiescent Current sourcing or sinking load current. The 2.85V output voltage n Ultralow Power Shutdown Mode regulator is ideal for use as a Boulay termination of up n Current Limit and Thermal Shutdown Protection to 27 SCSI data lines. The regulator maintains regulation n Stable for Any C 0.22F while both sourcing and sinking current, enabling the use LOAD n Fast Settling Time of active negation drivers for improved noise immunity on n 1V Dropout Voltage the data lines. Regulation of output voltage is maintained for TERMPWR voltages as low as 4.0V. When unloaded, quiescent supply current is a low 600A, allowing continu- APPLICATIONS ous connection to the TERMPWR lines. An ultralow power n Active Negation SCSI Terminations shutdown mode is also available on the SO-8 version. In n Computers Shutdown the output is high impedance and supply cur- n Disk Drives rent drops to less than 10A. n CD-ROM Current limits in both sourcing and sinking modes, plus n Supply Splitter on-chip thermal shutdown make the circuit tolerant of L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. output fault conditions. All other trademarks are the property of their respective owners. The LT1118 is available in 3-lead SOT-223 and 8-lead SO packages. TYPICAL APPLICATION Load Transient Response 0.2V IN LT1118-2.85 OUT V 0V OUT GND 0.2V 1F 5V 2.2F 800mA CERAMIC I LOAD I LOAD 1118 TA01 0mA 400mA 1118 TA02 1118fd 1LT1118/LT1118-2.5/ LT1118-2.85/LT1118-5 (Note 1) ABSOLUTE MAXIMUM RATINGS Supply Voltage (V ) ................................................15V Operating Temperature Range...................... 0C to 70C CC Input Voltage (Enable).................................0.2V to 7V Storage Temperature Range ...................65C to 150C Output Voltage ............................... 0.2V to V + 0.5V Lead Temperature (Soldering, 10 sec) .................. 300C CC Short-Circuit Duration ..................................... Inde nite PIN CONFIGURATION TOP VIEW TOP VIEW FRONT VIEW 3 GND 1 8 GND IN 1 8 EN IN NC 2 7 IN OUT 2 7 GND TAB IS 2 GND GND GND GND EN 3 6 OUT 3 6 IN 4 5 NC 1 FB 4 5 IN OUT S8 PACKAGE S8 PACKAGE ST PACKAGE 8-LEAD PLASTIC SO 8-LEAD PLASTIC SO 3-LEAD PLASTIC SOT-223 T = 125C, = 15C/W T = 125C, = 15C/W T = 125C, = 15C/W JMAX JC JMAX JA JMAX JA ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE LT1118CS8 PBF LT1118CS8 TRPBF 1118 8-Lead Plastic SO 0C to 70C LT1118CS8-2.5 PBF LT1118CS8-2.5 TRPBF 111825 8-Lead Plastic SO 0C to 70C LT1118CS8-2.85 PBF LT1118CS8-2.85 TRPBF 111828 8-Lead Plastic SO 0C to 70C LT1118CS8-5 PBF LT1118CS8-5 TRPBF 11185 8-Lead Plastic SO 0C to 70C LT1118CST-2.5 PBF LT1118CST-2.5 TRPBF 111825 3-Lead Plastic SOT-223 0C to 70C LT1118CST-2.85 PBF LT1118CST-2.85 TRPBF 111828 3-Lead Plastic SOT-223 0C to 70C LT1118CST-5 PBF LT1118CST-5 TRPBF 11185 3-Lead Plastic SOT-223 0C to 70C LEAD BASED FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LT1118CS8 LT1118CS8 TR 1118 8-Lead Plastic SO 0C to 70C LT1118CS8-2.5 LT1118CS8-2.5 TR 111825 8-Lead Plastic SO 0C to 70C LT1118CS8-2.85 LT1118CS8-2.85 TR 111828 8-Lead Plastic SO 0C to 70C LT1118CS8-5 LT1118CS8-5 TR 11185 8-Lead Plastic SO 0C to 70C LT1118CST-2.5 LT1118CST-2.5 TR 111825 3-Lead Plastic SOT-223 0C to 70C LT1118CST-2.85 LT1118CST-2.85 TR 111828 3-Lead Plastic SOT-223 0C to 70C LT1118CST-5 LT1118CST-5 TR 11185 3-Lead Plastic SOT-223 0C to 70C Consult LTC Marketing for parts speci ed with wider operating temperature ranges. For more information on lead free part marking, go to: