AP3441/L and AP3445/L Step-Down DC-DC Converters

By Diodes Incorporated 70

AP3441/L and AP3445/L Step-Down DC-DC Converters

Diodes’ AP3445 and AP3445L are 2 A step-down DC-DC converters. The AP3441 and AP3441L are 3 A step-down DC-DC converters. At heavy load, the constant frequency PWM control performs excellent stability and transient response. No external compensation components are required on AP3445/L and AP3441/L. The AP3445/L delivers 2 A and the AP3441/L delivers 3 A maximum output current while consuming only 55 µA of no-load quiescent current. Ultra-low RDS(ON) integrated MOSFETs and 100% duty cycle operation make them an ideal choice for high output voltage, high current applications which require a low dropout threshold. Pulse skip mode maintains high-efficiency at light-load conditions. AP3445/L is available in SOT236 package. AP3441/L is available in W-DFN2020-8 package.

Features
  • Protection
    • Input overvoltage protection, undervoltage lock-out, overtemperature protection, and short-circuit protection
    • AP3441L/AP3445L in latch-off protection
    • AP3441/AP3445 in hiccup mode protection
  • Packages: SOT236 and W-DFN2020-8
    • Low-profile, small footprint industry standard packages
  • Synchronous DC-DC buck converter with continued load current of 2 A/3 A and light-load high-efficiency
    • High switching frequency operation for small external components
    • Current mode control provides fast transient response
    • Excellent line and load regulation with high efficiency
Applications
  • Post DC-DC voltage regulations
  • Set-top-boxes
  • Notebook computers
  • Tablets

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