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MAX1902 - Maxim

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MAX1902 500kHz Multi-Output / Low-Noise Power-Supply Controllers for Notebook Computers

The MAX1901/MAX1902/MAX1904 are buck-topology, step-down, switch-mode, power-supply controllers that generate logic-supply voltages in battery-powered systems. These high-performance, dual/triple-output devices include on-board power-up sequencing, power-good signaling with delay, digital soft-start, secondary winding control, low dropout circuitry, internal.

Features

o o o o o o o o o o o o o o o o Features 97% Efficiency 4.2V to 30V Input Range 2.5V to 5.5V Dual Adjustable Outputs Selectable 3.3V and 5V Fixed or Adjustable Outputs (Dual Mode™) 12V Linear Regulator Adjustable Secondary Feedback (MAX1901/MAX1904) 5V/50mA Linear Regulator Output Precision 2.5V Reference Output Programmable Power-Up Sequencing Power-Good (RESET) Output Output Overvoltage Protection (MAX1901/MAX1902) Output Undervoltage Shutdown (MAX1901/MAX1902) 333kHz/500kHz Low-Noise, Fixed-Frequency Operation Low-Dropout, 98% Duty-Factor Operation 2.5mW Typical Quiescent Power (12V input.

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