The LT® 1308A/LT1308B are micropower, fixed frequency step-up DC/DC converters that operate over a 1V to 10V input voltage range. They are improved versions of the LT1308 and are recommended for use in new designs. The
LT1308A features automatic shifting to power saving Burst Mode operation at light loads and consumes just 140A at no load. The LT1308B features continuous switching at light loads and operates at a quiescent current of 2.5mA. Both devices consume less than 1A in shutdown.
Low-battery detector accuracy is significantly tighter than the LT1308. The 200mV reference is specified at ±2% at room and ±3% over temperature. The shutdown pin enables the device when it is tied to a 1V or higher source and does not need to be tied to V IN as on the LT1308. An clamp results in improved transient response internal VC and the switch voltage rating has been increased to 36V, enabling higher output voltage applications.
The LT1308A/LT1308B are available in the 8-lead SO and 14-lead TSSOP packages.
VIN, SHDN, LBO Voltage ......................................... 10V
SW Voltage ........................................... 0.4V to 36V
FB Voltage ..................................................... VIN + 1V
VC Voltage .............................................................. 2V
LBI Voltage .............................................. 0.1V to 1V
Current into FB Pin .............................................±1mA
Operating Temperature Range
Commercial ............................................ 0°C to 70°C
Extended Commerial (Note 2) ........... 40°C to 85°C
Industrial ........................................... 40°C to 85°C
Storage Temperature Range ........... 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................300°C
Required Field 
