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  Small Footprint, High Efficiency Current-Mode Buck Regulator for Portable Electronics &mdash LT Journal
  PDF, 174 Kb, Archivo publicado: mayo 1, 2001
  Extracto del documento

  DESIGN IDEAS Small Footprint, High Efficiency
  Current-Mode Buck Regulator
  by Mark Vitunic
  for Portable Electronics
  Introduction 1
  20k 2 SW ITH/RUN
  LTC1779
  GND VIN 6 5 VSW
  1V/DIV
  VIN = 3.6V
  IOUT = 100mA
  GND 500ns/DIV Figure 2. Pin 6 switching node waveform for Figure 1’s circuit Single Lithium-Ion to 1.8V/
  250mA Step-Down Converter
  Figure 1 shows the LTC1779 in a
  1.8V/250mA application powered
  from a single Li-Ion battery input.
  Figure 2 shows an oscilloscope photograph of the pin 6 switching node
  (SW) with VIN = 3.6V and IOUT = 100mA.
  The switch duty cycle is equal to (VOUT
  + VD)/(VIN + VD), where VD is the
  forward voltage drop of the external
  diode D1 and is approximately 53%.
  Figure 3 is a plot of efficiency vs load …

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• Power Management > Switching Regulator > Step-Down (Buck) Regulators > Internal Power Switch Buck

Otros nombres:

LTC1779ES6PBF, LTC1779ES6 PBF