LT1308A/LT1308B

      The LT1308A/LT1308B is a kind of high current, micropower single cell, 600kHz DC/DC converters, which has the characteristices of automatic burst Mode^TM Operation at light load (LT1308A), low VCESAT switch: 300mV at 2A, continuous switching at light loads(LT1308B), starts into heavy loads, pin-for-Pin upgrade compatible with LT1308, improved accuracy low-Battery detector reference: 200mV ±2%, lower quiescent current in shutdown: 1A (Max), available in 8-Lead SO and 14-Lead TSSOP packages, 5V at 1A from a single Li-Ion Cell, 5V at 800mA in SEPIC Mode from Four NiCd Cells, fixed frequency operation: 600kHz, boost converter outputs up to 34V.
      The LT1308A/LT1308B is used in GSM/CDMA Phones, LCD Bias Supplies, Digital Cameras, Answer-Back Pagers, Battery Backup Supplies, GPS Receivers and Handheld Computers.
      The LT^® 1308A/LT1308B are fixed frequency step-up DC/DC converters that operate over a 1V to 10V input voltage range as well as a kind of micropower. They are improved versions of the LT1308 and are recommended for use in new designs, which features automatic shifting to power saving Burst Mode operation at light loads and consumes just 140A  at no load, and continuous switching at light loads and operates at a quiescent current of 2.5mA. Both devices consume less than 1A in shutdown.
There is some tips to care about, the LT1308A/LT1308B.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 at a higher source and does not need to be tied to VIN as on the LT1308. An internal VC clamp results in improved transient response 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 the 14-lead TSSOP packages.