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MAX1533 - Main Power-Supply Controllers

General Description

The MAX1533/MAX1537 are dual step-down, switchmode power-supply (SMPS) controllers with synchronous rectification, intended for main 5V/3.3V power generation in battery-powered systems.

Key Features

  • Fixed-Frequency, Current-Mode Control MAX1533/MAX1537 Pin Configurations SHDN CSH5 BST5 LX5 CSL5 SKIP TOP VIEW DH5 32 ON5 ON3 FSEL ILIM3 ILIM5 31 30 29 28 27 IN 26 25 24 23 22 21 FB5 LDO5 DL5 PGND DL3 LDO3 FB3 CSL3.

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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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19-3501; Rev 0; 11/04 KIT ATION EVALU E L B A IL AVA www.DataSheet4U.com High-Efficiency, 5x Output, Main Power-Supply Controllers for Notebook Computers General Description The MAX1533/MAX1537 are dual step-down, switchmode power-supply (SMPS) controllers with synchronous rectification, intended for main 5V/3.3V power generation in battery-powered systems. Fixed-frequency operation with optimal interleaving minimizes input ripple current from the lowest input voltages up to the 26V maximum input. Optimal 40/60 interleaving allows the input voltage to go down to 8.3V before duty-cycle overlap occurs, compared to 180° out-of-phase regulators where the duty-cycle overlap occurs when the input drops below 10V. Output current sensing provides accurate current limit using a sense resistor.