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  80ВµA Quiescent Current Synchronous Step-Down Controller Extends Battery Life in Automotive Applications &mdash DN1014
  PDF, 103 Kb, Datei veröffentlicht: Dec 18, 2006
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  advertisement 80µA Quiescent Current Synchronous Step-Down Controller Extends Battery Life in Automotive Applications – Design Note 1014
  Julian Zhu Introduction
  Battery powered applications that have a significant
  amount of time in standby mode, require electrical circuits
  to operate with a low quiescent current to preserve battery life. The LTC3835 synchronous step-down controller
  is an excellent solution with its ultralow quiescent current (80µA). Other features make it uniquely qualified to
  satisfy the needs of automotive applications. A wide 4V
  to 36V input voltage range protects the supply against
  high input voltage transients and is compatible with low
  voltage cold crank conditions. The constant frequency
  current-mode architecture with high-side inductor current sensing provides excellent line and load regulation
  and reliable current limiting and sharing. The 0.8V to
  10V output voltage range provides flexibility for a variety
  of applications. Solution size is small due to the 650kHz
  switching frequency, which reduces external component
  sizes, and the integrated synchronous FET driver, which
  keeps component count low. Furthermore, the LTC3835
  provides high efficiency over a wide load range up to 20A.
  Other important features include:
  CLKOUT The output voltage can be ramped during start-up with
  an adjustable soft-start or it can track an external ramp
  signal. The controller can be synchronized to an external clock
  via a phase-locked loop. The CLKOUT pin and current mode control allow interleaved operation of multiple parallel controllers for …

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• Power Management > Switching Regulator > Step-Down (Buck) Regulators > Micropower Buck Regulators | External Power Switch Buck Controllers

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LTC3835IDHC-1PBF, LTC3835IDHC-1 PBF, LTC3835IDHC1#PBF, LTC3835IDHC 1#PBF