LT1308A
LT1308B

PRODUCTION

Single Cell High Current Micropower 600kHz Boost DC/DC Converter

Part Models: 8
1ku List Price: Starting From $4.69

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Overview

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 V_CESAT 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

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 V_IN as on the LT1308. An internal V_CC 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.


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

Applications

GSM/CDMA Phones
Digital Cameras
LCD Bias Supplies
Answer-Back Pagers
GPS Receivers
Battery Backup Supplies
Handheld Computers

Part Models: 8
1ku List Price: Starting From $4.69

Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
LT1308ACS8#PBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1308ACS8#TRPBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1308AIS8#PBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1308AIS8#TRPBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1308BCS8#PBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1308BCS8#TRPBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1308BIS8#PBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1308BIS8#TRPBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Oct 8, 2024 - 24_0236 Migrating Bottom Trace Code Marking to Top Side Laser Marking for SOIC_N Package
		PCN24_0236_Form Material_Report Marking Comparison Delta Qualification Matrix
LT1308ACS8#PBF	PRODUCTION
LT1308ACS8#TRPBF	PRODUCTION
LT1308AIS8#PBF	PRODUCTION
LT1308AIS8#TRPBF	PRODUCTION
LT1308BCS8#PBF	PRODUCTION
LT1308BCS8#TRPBF	PRODUCTION
LT1308BIS8#PBF	PRODUCTION
LT1308BIS8#TRPBF	PRODUCTION
Oct 12, 2022 - 22_0254 Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 1 of 2)
		PCN22_0254_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LT1308ACS8#PBF	PRODUCTION
LT1308ACS8#TRPBF	PRODUCTION
LT1308AIS8#PBF	PRODUCTION
LT1308AIS8#TRPBF	PRODUCTION
LT1308BCS8#PBF	PRODUCTION
LT1308BCS8#TRPBF	PRODUCTION
LT1308BIS8#PBF	PRODUCTION
LT1308BIS8#TRPBF	PRODUCTION
Jun 11, 2021 - 21_0060 Laser Top Mark for 8SOICN Assembled in ADPG, UTL and CRM
		PCN21_0060_Form Material_Report Delta Qualification Matrix
LT1308ACS8#PBF	PRODUCTION
LT1308ACS8#TRPBF	PRODUCTION
LT1308AIS8#PBF	PRODUCTION
LT1308AIS8#TRPBF	PRODUCTION
LT1308BCS8#PBF	PRODUCTION
LT1308BCS8#TRPBF	PRODUCTION
LT1308BIS8#PBF	PRODUCTION
LT1308BIS8#TRPBF	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Hardware Ecosystem

Parts	Product Life Cycle	Description
LT1610	PRODUCTION	1.7MHz, Single Cell Micropower DC/DC Converter

Tools & Simulations

LTspice 1

LT1308B Demo Circuit - µPower 600kHz Step-Up Regulator (5V to 12V @ 500mA)

Models for the following parts are available in LTspice:

LT1308A
LT1308B

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.