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  Power Supply Tracking for Linear Regulators &mdash LT Journal
  PDF, 267 Kb, Archivo publicado: marzo 25, 2005
  Extracto del documento

  DESIGN FEATURES Power Supply Tracking for
  Linear Regulators
  Introduction (see “Versatile Power Supply Tracking
  without MOSFETs” from Linear Technology Magazine, February, 2004 ) but
  it is easily adapted to linear regulators,
  including popular low-dropout (LDO)
  types. Summarized here are several
  techniques for controlling linear regulators with the LTC2923. The LTC2923 provides simple and
  versatile control over the power-up
  and power-down behavior of switching
  power supplies. It allows several supplies to track the voltage of a master
  supply, so that their relative voltages
  meet the stringent specifications for
  the power up of modern digital
  semiconductors, such as DSPs, microprocessors, FPGAs and ASICs. The
  LTC2923 is specifically designed to
  work with switching power supplies Monolithic Regulators
  Table 1 lists three popular monolithic
  linear regulators that have been tested
  with the LTC2923. Using these three Table 1. New monolithic linear regulators Regulator IOUT(MAX) (V) VIN(MIN) (V) VIN(MAX) (V) VDROPOUT (V) LT3020 100mA 0.9 10 0.15 LTC1844 150mA 1.6 6.5 0.11 LTC3025 300mA 0.9 5.5 0.045 3.3V IN
  2.2ВµF 3.3V CGATE
  0.1ВµF 0.1ВµF
  VCC GATE OFF ON ON SHDN …

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• Power Management > LDO Linear Regulators > Positive Linear Regulators (LDO)

Otros nombres:

LT3020IDDPBF, LT3020IDD PBF