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MAX8744AETJ+

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Description

The MAX8744A/MAX8745A are dual step-down, switch mode, 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 rip ple 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.
Features
♦ Fixed-Frequency, Current-Mode Control
♦ 40/60 Optimal Interleaving
♦ Internal BST Switches
♦ Internal 5V, 100mA Linear Regulator
♦ Auxiliary Linear-Regulator Driver (12V or Adjustable Down to 1V)
♦ Dual Mode™ Feedback—3.3V/5V Fixed or Adjustable Output Voltages
♦ 200kHz/300kHz/500kHz Switching Frequency
♦ Undervoltage and
Thermal-Fault Protection
♦ Overvoltage-Fault Protection (MAX8744A Only)
♦ 6V to 26V Input Range
♦ 2V ±0.75% Reference Output
♦ Independent Enable Inputs and Power-Good Outputs
♦ Soft-Start and Soft-Shutdown (Voltage Ramp)
♦ 8μA (typ) Shutdown Current
Alternatives

Functional Equivalent (FE) materials, including Fused Filament Fabrication (FFF) form, assembly, and functionally compatible substitute materials.

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