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MAX799 Datasheet Step-down Controllers

Manufacturer: Maxim Integrated (now Analog Devices)

Overview: 19-0221; Rev 4; 9/05 KIT ATION EVALU E L B AVAILA Step-Down Controllers with Synchronous Rectifier for CPU.

General Description

The MAX796/MAX797/MAX799 high-performance, stepdown DC-DC converters with single or dual outputs provide main CPU power in battery-powered systems.

These buck controllers achieve 96% efficiency by using synchronous rectification and Maxim’s proprietary Idle Mode™ control scheme to extend battery life at full-load (up to 10A) and no-load outputs.

Excellent dynamic response corrects output transients caused by the latest dynamic-clock CPUs within five 300kHz clock cycles.

Key Features

  • 96% Efficiency.
  • 4.5V to 30V Input Range.
  • 2.5V to 6V Adjustable Output.
  • Preset 3.3V and 5V Outputs (at up to 10A).
  • Multiple Regulated Outputs.
  • +5V Linear-Regulator Output.
  • Precision 2.505V Reference Output.
  • Automatic Bootstrap Circuit.
  • 150kHz/300kHz Fixed-Frequency PWM Operation.
  • Programmable Soft-Start.
  • 375µA Typ Quiescent Current (V IN = 12V, V OUT = 5V).
  • 1µA Typ Shutdown Current ______.

MAX799 Distributor & Price

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