Microchip – MIC24046: Pin-Configurable, 19V, 5A DC/DC Step Down Converter


Power Regulation, Conversion and Management
The MIC24046 is a high efficiency pin-configurable 5A synchronous buck converter in a tiny 3 x 3mm QFN package. The device features pin selectable output voltage, switching frequency and current limit settings which improve design flexibility and eliminate multiple external components. The solution offers three settings for switching frequency (400kHz, 565kHz, or 790kHz) and the output voltage can be selected from 0.7V to 3.3V via nine different settings. An internal divider is used for true 1% VOUT accuracy setting from 0.7V to 1.2V.


  • 4.5V to 19V input voltage range
  • >90% efficiency
  • ±1% output voltage accuracy
  • Pin-selectable current limit and switching frequency
  • Internal soft start and thermal shutdown protection
  • Hiccup-mode short circuit protection
  • 5A (maximum) output current
  • 0.7V to 3.3V pin-selectable output voltages
  • Supports safe start-up with pre-biased output
  • 20-pin 3 x 3mm QFN package
  • -40°C to +125°C junction temperature range
  • 1k MSRP: $1.33 US