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MAX1745 - High-Voltage / Step-Down DC-DC Controller

General Description

The MAX1744/MAX1745 are step-down DC-DC controllers capable of handling up to 36V inputs.

Key Features

  • High-Voltage Operation (Up to 36V IN).
  • Efficiency > 90%.
  • Output Power Capability Exceeds 50W.
  • 10-Pin µMax Package.
  • Low-Dropout Voltage.
  • 100% (max) Duty Cycle.
  • 90µA Quiescent Current.
  • 4µA Shutdown Current.
  • Up to 330kHz Switching Frequency.
  • Output Voltage 5V or 3.3V (MAX1744) Adjustable 1.25V to 18V (MAX1745).
  • Current-Limited Control Scheme Ordering Information PART TEMP RANGE PIN-.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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MAX1744/MAX1745 19-1776; Rev 4; 8/09 EVAALVUAAILTAIOBNLEKIT High-Voltage, Step-Down DC-DC Controllers in µMAX General Description The MAX1744/MAX1745 are step-down DC-DC controllers capable of handling up to 36V inputs. These parts use a proprietary current-limited control scheme for excellent light- and full-load efficiency, while their 330kHz (max) switching frequency permits small external components for space-critical applications. Operation to 100% duty cycle permits the lowest possible dropout voltage. The MAX1744 contains an internal feedback network that provides a pin-selectable output voltage of either 3.3V or 5V. The MAX1745 uses an external feedback network to generate an adjustable output voltage between 1.25V and 18V.