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MAX1742 - Step-Down Regulators

Datasheet Summary

Description

The MAX1742/MAX1842 constant-off-time, pulse-widthmodulated (PWM) step-down DC-DC converters are ideal for use in 5V and 3.3V to low-voltage conversion necessary in notebook and subnotebook computers.

Features

  • ±1% Output Accuracy.
  • 95% Efficiency.
  • Internal PMOS and NMOS Switches 90mΩ On-Resistance at VIN = 4.5V 110mΩ On-Resistance at VIN = 3V.
  • Output Voltage 2.5V, 1.8V, or 1.5V Pin Selectable 1.1V to VIN Adjustable.
  • 3V to 5.5V Input Voltage Range.
  • 600μA (max) Operating Supply Current.

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Datasheet preview – MAX1742

Datasheet Details

Part number MAX1742
Manufacturer Maxim
File Size 278.03 KB
Description Step-Down Regulators
Datasheet download datasheet MAX1742 Datasheet
Additional preview pages of the MAX1742 datasheet.

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Full PDF Text Transcription

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MAX1742/MAX1842 19-1760; Rev 2; 9/05 EVAALVUAAILTAIOBNLEKIT 1A/2.7A, 1MHz, Step-Down Regulators with Synchronous Rectification and Internal Switches General Description The MAX1742/MAX1842 constant-off-time, pulse-widthmodulated (PWM) step-down DC-DC converters are ideal for use in 5V and 3.3V to low-voltage conversion necessary in notebook and subnotebook computers. These devices feature internal synchronous rectification for high efficiency and reduced component count. They require no external Schottky diode. The internal 90mΩ PMOS power switch and 70mΩ NMOS synchronous-rectifier switch easily deliver continuous load currents up to 1A. The MAX1742/MAX1842 produce a preset 2.5V, 1.8V, or 1.5V output voltage or an adjustable output from 1.1V to VIN.
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