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MAX17543 - Synchronous Step-Down DC-DC Converter

Description

The MAX17543 high-efficiency, high-voltage, synchronous step-down DC-DC converter with integrated MOSFETs operates over a 4.5V to 42V input.

The converter can deliver up to 2.5A and generates output voltages from 0.9V up to 0.9 x VIN.

Features

  • Reduces External Components and Total Cost.
  • No Schottky.
  • Synchronous Operation.
  • Internal Compensation for Any Output Voltage.
  • Built-In Soft-Start.
  • All-Ceramic Capacitors, Compact Layout.
  • Reduces Number of DC-DC Regulators to Stock.
  • Wide 4.5V to 42V Input.
  • Adjustable 0.9V to 0.9 x VIN Output.
  • 100kHz to 2.2MHz Adjustable Switching Frequency with External Synchronization.
  • Reduces Power Diss.

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Full PDF Text Transcription

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MAX17543 EVALUATION KIT AVAILABLE 4.5V–42V, 2.5A, High-Efficiency, Synchronous Step-Down DC-DC Converter with Internal Compensation General Description The MAX17543 high-efficiency, high-voltage, synchronous step-down DC-DC converter with integrated MOSFETs operates over a 4.5V to 42V input. The converter can deliver up to 2.5A and generates output voltages from 0.9V up to 0.9 x VIN. The feedback (FB) voltage is accurate to within ±1.1% over -40°C to +125°C. The MAX17543 uses peak current-mode control. The device can be operated in the pulse-width modulation (PWM), pulse-frequency modulation (PFM), or discontinuous conduction mode (DCM) control schemes. The device is available in a 20-pin (4mm x 4mm) TQFN package. Simulation models are available.
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