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  40µA IQ, P-Channel Step-Down Controller Operates from 60V to 3.5V VIN and Maintains High Efficiency at Light Loads &mdash LT Journal
  PDF, 2.7 Mb, Datei veröffentlicht: Apr 10, 2013
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  40ВµA IQ, P-Channel Step-Down Controller Operates from
  60V to 3.5V VIN and Maintains High Efficiency at Light Loads
  Terry Groom The LTC3864 is low IQ step-down DC/DC controller. It controls an external
  P-channel MOSFET to provide excellent light load efficiency, wide input voltage
  range (3.5V–60V) including low dropout operation, reliability and functional simplicity
  in an easy-to-use 12-pin package. The LTC3864 is capable of 100% duty factor
  operation, allowing continued operation with input supply voltage droop. HIGH EFFICIENCY
  PMOS CONTROLLER The LTC3864 offers high efficiency at
  full and light load by virtue of a strong
  0.9О© turn-on and 2О© turn-off gate driver
  and 40Вµ A low IQ Burst ModeВ® operation. Modern automotive always-on
  applications often require less than
  70Вµ A total supply current to prevent
  battery drain. Burst Mode switching
  and a low IQ of only 40Вµ A allows high
  efficiency at these very low currents.
  Figure 1 shows a typical efficiency graph,
  showing very little decline as the load
  current is reduced. Light load efficiency
  is achieved in two ways: first by low
  frequency Burst Mode switching, and
  second by low VIN IQ. In light load Burst
  Mode operation, the load current is …

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Herstellerklassifikation

• Power Management > Switching Regulator > Step-Down (Buck) Regulators > Micropower Buck Regulators | High Input Voltage Buck | External Power Switch Buck Controllers
• Space & Harsh Environment > Extended Temperature Plastic (H & MP) > Extended Temperature (H & MP) Switching Regulators

Andere Namen:

LTC3864EMSEPBF, LTC3864EMSE PBF