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Analog Devices / Maxim Integrated Convertidores CC-CC de descenso de tensión MAX17543/44/45

Maxim's MAX17543/44/45 High-Efficiency Synchronous Step-Down DC-DC Converters are a high-efficiency, high-voltage, synchronous step-down DC-DC converter with integrated MOSFETs operates over 4.5V to 42V input. The converter can deliver 1.7A, 2.5A or 3.5A 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 MAX17543/44/45 uses peak-current-mode control. The device can be operated in pulse-width modulation (PWM), pulse-frequency modulation (PFM), or discontinuous conduction mode (DCM) control schemes.

Características

  • 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 dissipation
    • Peak efficiency > 90%
    • PFM/DCM Enables enhanced light-load efficiency
    • 2.8μA Shutdown current
  • Operates reliably in adverse industrial environments
    • Peak current-limit protection
    • Built-in output voltage monitoring with RESET
    • Programmable EN/UVLO threshold
    • Monotonic startup into prebiased load
    • Overtemperature protection
    • -40°C to +125°C Operation

Aplicaciones

  • Industrial power supplies
  • Distributed supply regulation
  • High-voltage single-board systems
  • Base station power supply
  • General-purpose point-of-load

Block Diagram

Diagrama de bloques - Analog Devices / Maxim Integrated Convertidores CC-CC de descenso de tensión MAX17543/44/45
Publicado: 2014-10-23 | Actualizado: 2023-04-12