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LTC3423 LTC3423

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  Low Output Voltage Synchronous Boost Regulators Extend Battery Life in Single Cell Applications &mdash LT Journal
  PDF, 210 Kb, Datei veröffentlicht: Mar 1, 2002
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  DESIGN IDEAS Low Output Voltage Synchronous
  Boost Regulators Extend Battery Life in
  by Mark Jordan
  Single Cell Applications
  Introduction
  3.3V OUTPUT
  90% EFFICIENT The LTC3423 and LTC3424 Synchronous Boost Regulators are designed
  for single cell (Alkaline, NiMH, or NiCd)
  portable electronics that require a
  low voltage supply, typically between
  1.5V to 2.5V, at load currents up to
  0.8 amps. These products are designed to prolong battery life for
  applications where an available higher
  voltage supply (2.7V to 5.5V) can provide internal bias for the IC. Before
  the LTC3423 and LTC3424 became
  available, power supplies for low voltage, high current solutions included
  a buck converter from the higher voltage output, a simple, but relatively
  inefficient solution. These new devices offer a solution that is just as
  simple, but with much improved efficiency. The simple block diagrams in
  Figures 1A and 1B show how this
  difference arises: double conversion
  is shown Figure 1A, and the approach
  of regulating the low voltage supply …

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• Power Management > Switching Regulator > Step-Up (Boost) Regulators > Micropower Boost | Internal Power Switch Boost