LT1308A and B - Single Cell High Current Micropower 600kHz Boost DC/DC Converter


  • 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
  • Starts into Heavy Loads
  • Automatic Burst Mode Operation at Light Load (LT1308A)
  • Continuous Switching at Light Loads (LT1308B)
  • Low VCESAT Switch: 300mV at 2A
  • Pin-for-Pin Upgrade Compatible with LT1308
  • Lower Quiescent Current in Shutdown: 1µA (Max)
  • Improved Accuracy Low-Battery Detector Reference: 200mV ±2%
  • Available in 8-Lead SO and 14-Lead TSSOP Packages

Typical Application

LT1308A Typical Application
LT1308A Typical Application


The LT1308A/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 140µA 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 1µA 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 need to be tied to VIN as on the LT1308. An internal VCC 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.

LT1308 Not Recommended For New Designs
LT1308A Improved Transient Response, Burst Mode
LT1308B Improved Transient Response, Burst Mode Disabled


CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
LT1308ACS8#PBF SO-8 S8 C 05-08-1610 (S8) Yes
LT1308ACS8#TRPBF SO-8 S8 C 05-08-1610 (S8) Yes
LT1308AIS8#PBF SO-8 S8 I 05-08-1610 (S8) Yes
LT1308AIS8#TRPBF SO-8 S8 I 05-08-1610 (S8) Yes
LT1308BCS8#PBF SO-8 S8 C 05-08-1610 (S8) Yes
LT1308BCS8#TRPBF SO-8 S8 C 05-08-1610 (S8) Yes
LT1308BIS8#PBF SO-8 S8 I 05-08-1610 (S8) Yes
LT1308BIS8#TRPBF SO-8 S8 I 05-08-1610 (S8) Yes

LT1308A Package Drawing
LT1308A Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
LT1308ACS8#PBF SO-8 C $3.95 $3.25 Yes
LT1308ACS8#TRPBF SO-8 C $3.31 Yes
LT1308AIS8#PBF SO-8 I $4.55 $3.75 Yes
LT1308AIS8#TRPBF SO-8 I $3.81 Yes
LT1308BCS8#PBF SO-8 C $3.95 $3.25 Yes
LT1308BCS8#TRPBF SO-8 C $3.31 Yes
LT1308BIS8#PBF SO-8 I $4.55 $3.75 Yes
LT1308BIS8#TRPBF SO-8 I $3.81 Yes
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* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Click here to view our complete list of demo boards


  • GSM/CDMA Phones
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  • GPS Receivers
  • Battery Backup Supplies
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