SPECIFICATION NOTICE LT1579I November 1998 The specifications for the LT ®1579I are different from the LT1579C and are indicated below in bold. For complete specifications, typical performance characteristics and applications information, please see the LT1579 data sheet. , LTC and LT are registered trademarks of Linear Technology Corporation. W U U PACKAGE/ORDER I FOR ATIO ORDER PART NUMBER POWER INPUTS GND 1 16 GND VIN1 2 15 OUT VIN2 3 14 BACKUP 13 DROPOUT SS 4 12 LBO1 CONTROL SHDN 5 INPUTS LBI1 6 LOGIC OUTPUTS 11 LBO2 LBI2 7 10 BIASCOMP GND 8 9 GND GN PACKAGE S PACKAGE 16-LEAD PLASTIC SSOP 16-LEAD PLASTIC SO SEE APPLICATION INFORMATION SECTION TJMAX = 125°C, θJA = 95°C/W (GN) TJMAX = 125°C, θJA = 68°C/W (S) LT1579CGN-3 LT1579CGN-3.3 LT1579CGN-5 LT1579CS-3 LT1579CS-3.3 LT1579CS-5 LT1579IGN-3 LT1579IGN-3.3 LT1579IGN-5 GN PART MARKING 15793 157933 15795 1579I3 579I33 1579I5 ORDER PART NUMBER TOP VIEW POWER INPUTS GND 1 16 GND VIN1 2 15 OUT VIN2 3 14 ADJ SS 4 CONTROL INPUTS LT1579CGN LT1579CS LT1579IGN 13 BACKUP SHDN 5 12 LBO1 LBI1 6 11 LBO2 LBI2 7 10 BIASCOMP GND 8 9 LOGIC OUTPUTS GND GN PACKAGE S PACKAGE 16-LEAD PLASTIC SSOP 16-LEAD PLASTIC SO GN PART MARKING SEE APPLICATION INFORMATION SECTION TJMAX = 125°C, θJA = 95°C/W (GN) TJMAX = 125°C, θJA = 68°C/W (S) 1579 1579I U TOP VIEW W W W ABSOLUTE MAXIMUM RATINGS Operating Junction Temperature Range LT1579C ............................................................... 0°C to 125°C LT1579I ............................................ – 40°C to 125°C ELECTRICAL CHARACTERISTICS PARAMETER Dropout Voltage (Notes 3, 4, 12) Quiescent Current in Shutdown CONDITIONS IVIN1: VIN1 = 20V, VIN2 = 6V, VSHDN = 0V IVIN2: VIN1 = 6V, VIN2 = 20V, VSHDN = 0V MIN ● ● TYP MAX 5 5 15 15 UNITS µA µA Note 12: For the LT1579I, dropout voltage below 0°C will be determined by minimum input voltage. For further information regarding this specification notice contact: Linear Technology Corporation 1630 McCarthy Blvd. Milpitas, California 95035-7417 Attn: Product Marketing Manager Phone: (408) 432-1900 sn1579i ©1998 LT/HP 1198 • PRINTED IN USA