LT1307 - Single Cell Micropower 600kHz PWM DC/DC Converters

Unlike competitive devices, large electrolytic capacitors are not required with the LT1307/LT1307B in single cell applications. The high frequency (600kHz) switching allows the use of tiny surface mount multilayer ceramic (MLC) capacitors along with small surface mount inductors. The devices work with just 10µF of output capacitance and require only 1µF of input bypassing.

The LT1307/LT1307B are available in 8-lead MSOP, PDIP and SO packages.

Features
  • Uses Small Ceramic Capacitors
  • 50µA Quiescent Current (LT1307)
  • 1mA Quiescent Current (LT1307B)
  • Operates with VIN as Low as 1V
  • 600kHz Fixed Frequency Operation
  • Starts into Full Load
  • Low Shutdown Current: 3µA
  • Low-Battery Detector
  • 3.3V at 75mA from a Single Cell
  • Automatic Burst Mode® Operation at Light Load (LT1307)
  • Continuous Switching at Light Load (LT1307B)
  • Low VCESAT Switch: 295mV at 500mA
Typical Application

Applications
  • Pagers
  • Cordless Telephones
  • GPS Receivers
  • Battery Backup
  • Portable Electronic Equipment
  • Glucose Meters
  • Diagnostic Medical Instrumentation
Packaging

Order Information
Part NumberPackageTempPrice(1-99)Price (1k)*
LT1307BCMS8#PBFMS-8C$3.15$2.40
LT1307BCMS8#TRPBFMS-8C$2.46
LT1307BCS8#PBFSO-8C$2.75$2.05
LT1307BCS8#TRPBFSO-8C$2.11
LT1307BIS8#PBFSO-8I$3.50$2.60
LT1307BIS8#TRPBFSO-8I$2.66
LT1307CMS8#PBFMS-8C$3.15$2.40
LT1307CMS8#TRPBFMS-8C$2.46
LT1307CN8#PBFN-8C$2.75$2.05
LT1307CS8#PBFSO-8C$2.75$2.05
LT1307CS8#TRPBFSO-8C$2.11
LT1307IS8#PBFSO-8I$3.50$2.60
LT1307IS8#TRPBFSO-8I$2.66
Demo Boards
Part NumberDescriptionPrice
DC097A-ALT1307CS8 | Micropower DC/DC Converter, 1 Cell to 3V @ 60mA$100.00
DC097A-BLT1307CS8 | Micropower DC/DC Converter, 1 Cell to 5V @ 40mA$100.00
Datasheet
Application Note
Design Note
Reliability Data
LT Journal
Related Product
LT1307/LT1307B - Single Cell Micropower 600kHz PWM DC/DC Converters
LT1307 Package Drawing LT1307
AN67 - Linear Technology Magazine Circuit Collection, Volume III
AN84 - Linear Technology Magazine Circuit Collection, Volume IV
DN128 - LT1307 Single-Cell Micropower Fixed-Frequency DC/DC Converter Needs No Electrolytic Capacitors
R303 Reliability Data
May 2002 Small, Portable Altimeter Operates from a Single Cell
LT1307 Footprints and Symbols