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Notas de Diseño

• Descargar
  Compact I2C-Controllable Quad Synchronous Step-Down DC/DC Regulator for Power-Conscious Portable Processors &mdash DN442
  PDF, 106 Kb, Archivo publicado: mayo 2, 2008
  Extracto del documento

  Compact I2C-Controllable Quad Synchronous Step-Down
  DC/DC Regulator for Power-Conscious Portable Processors
  Design Note 442
  Jim Drew
  Introduction
  The LTCВ®3562 quad output step-down regulator is designed
  for multicore handheld microprocessor applications that
  operate from a single Li-Ion battery. Its four monolithic, high
  efficiency buck regulators support Intel’s mobile CPU P-State
  and C-State energy saving operating modes. The output
  voltages are independently controllable via I2C, and each
  output can be independently started and shut down. Designers can choose from power saving pulse-skipping mode or
  Burst ModeВ® operation, or select low noise LDO mode. The
  space-saving LTC3562 is available in a 3mm Г— 3mm QFN
  package and requires few external components.
  Four I2C-Controllable Regulators
  Two of the regulators provide up to 600mA of output
  current each while the other two provide up to 400mA
  each. All regulators are internally compensated, so no
  external compensation components are needed.
  One of the 600mA regulators and one of the 400mA regulators (R600A and R400A) feature I2C-controllable feedback
  voltages, as shown in Figure 1. The output voltages of
  these “Type A” regulators are set by a combination of external programming resistors and I2C-adjustable feedback …

Artículos

• Descargar
  I²C Quad Buck Regulator Packs Performance, Functionality, Versatility and Adaptability in a 3mm × 3mm QFN &mdash LT Journal
  PDF, 285 Kb, Archivo publicado: enero 14, 2008
  Extracto del documento

  L DESIGN IDEAS I2C Quad Buck Regulator Packs
  Performance, Functionality, Versatility
  and Adaptability in a 3mm Г— 3mm QFN
  by Joe Panganiban
  I2C Programmable
  The LTC3562 is an I2C quadruple erating modes to satisfy the various Output Voltages
  Introduction step-down regulator composed of four
  extremely versatile monolithic buck
  converters. Two 600mA and two 400mA
  highly adjustable step-down regulators
  provide a total of 2A of available output
  current, all packed inside a 3mm Г— 3mm
  QFN package. All four regulators are
  2.25MHz, constant-frequency, current
  mode switching buck converters whose
  output voltages and operating modes
  can be independently adjusted through
  I2C control. The 2.7V to 5.5V input
  voltage range makes it ideally suited for
  single Li-Ion battery-powered applications requiring multiple independent
  voltage supply rails. I2C Programmable
  Operating Modes All four LTC3562 step-down regulators have the unique ability to be
  programmed into four distinct op-noise/power demands of a variety of …

Linea modelo

Clasificación del fabricante

• Power Management > Switching Regulator > Step-Down (Buck) Regulators > Micropower Buck Regulators | Internal Power Switch Buck | Multiple Output Buck
• Power Management > Switching Regulator > Digitally Programmable Regulators

Otros nombres:

LTC3562EUDPBF, LTC3562EUD PBF