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  1ОјA IQ Synchronous Boost Converter Extends Battery Life in Portable Devices &mdash DN516
  PDF, 309 Kb, File published: May 29, 2013
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  1ВµA IQ Synchronous Boost Converter Extends Battery Life in
  Portable Devices
  Design Note 516
  Goran Perica
  Introduction
  Boost converters are regularly used in portable devices to produce higher output voltages from lower
  battery input voltages. Common battery configurations include two to three alkaline or NiMH cells or,
  increasingly, Li-Ion batteries, yielding a typical input
  voltage between 1.8V and 4.8V. Because the batteries used in portable devices are
  usually as small as possible, they present high internal impedance under heavy loads, especially close to
  the end of their discharge cycle. Unlike other boost
  converters that struggle with high source impedance
  at startup, the LTC3122 prevents high surge currents
  at startup. The 12V output converter shown in Figure 1 is designed
  to run from any typical small battery power source. This
  design centers around the LTCВ®3122 boost converter,
  which can efficiently generate a regulated output
  up to 15V from a 1.8V to 5.5V input. The LTC3122
  includes a 2.5A internal switch current limit and a full
  complement of features to handle demanding boost
  applications, including switching frequency programming, undervoltage lockout, Burst ModeВ® operation or
  continuous switching mode, and true output disconnect.
  The integrated synchronous rectifier is turned off when …

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Manufacturer's Classification

• Power Management > Switching Regulator > Step-Up (Boost) Regulators > Micropower Boost | Internal Power Switch Boost
• Space & Harsh Environment > Extended Temperature Plastic (H & MP) > Extended Temperature (H & MP) Switching Regulators

Other Names:

LTC3122IMSEPBF, LTC3122IMSE PBF