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• Descargar
  Multi-Rail DC/DC Converter in a 3mm × 3mm QFN Takes Inputs as Low as 0.7V &mdash LT Journal
  PDF, 303 Kb, Archivo publicado: jun 23, 2008
  Extracto del documento

  L DESIGN IDEAS Multi-Rail DC/DC Converter in
  a 3mm Г— 3mm QFN Takes
  by Dave Salerno
  Inputs as Low as 0.7V
  Introduction 32 MBR0520 USB
  INPUT 4.7ВµF 3.3V AT: 100mA FOR VBATT = 1.2V
  300mA FOR VBATT = 2.4V
  250mA FOR USB INPUT 3.3ВµH VOUT VBATT
  0.9V TO
  3.3V SWBST VINBK
  VINBST 1.07M VBST 4.7ВµF FBBST 4.7ВµF 324k
  VLDO
  LTC3100 301k 200k
  FBLDO 1.8V AT 50mA 100k VLDO
  2.2ВµF 10ВµH
  MODE 64.9k SWBK RUNBST FBBK RUNLDO PGBST RUNBK GND 4.7ВµF PGBK 20k Figure 1. Multiple-input source 3.3V and 1.8V converter and 5.25V. Both converters feature
  automatic Burst ModeВ® operation for
  high efficiency at light loads. For low
  noise applications, Burst Mode operation can be disabled by grounding the
  MODE pin. The 100mA LDO, whose
  input is internally connected to the
  boost output, can be used to produce
  a third, low noise output. It can also …

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Clasificación del fabricante

• Power Management > PMIC & Multifunction > Multitopology DC/DC
• Power Management > Switching Regulator > Step-Down (Buck) Regulators > Buck Regulator Plus LDO | Micropower Buck Regulators | Internal Power Switch Buck

Otros nombres:

LTC3100EUDPBF, LTC3100EUD PBF