MIC22205 Buck Regulator

By Microchip Technology 135

MIC22205 Buck Regulator

The Microchip MIC22205 is a high-efficiency, 2 A integrated switch synchronous buck (step-down) regulator. This device is optimized for the highest possible efficiency, achieving more than 95% efficiency while still switching at 1 MHz. The ultra-high speed control loop keeps the output voltage within regulation, even under the extreme transient load swings commonly found in FPGAs and low-voltage ASICs. The output voltage is pre-bias safe and can be adjusted down to 0.7 V to address all low-voltage power needs.

The MIC22205 offers a full range of sequencing and tracking options. The Enable/Delay (EN/DLY) pin, combined with the Power Good (PG) pin, allows multiple outputs to be sequenced in any way during turn-on and turn-off. The Ramp Control™ (RC) pin allows the device to be connected to another product in the MIC22xxx and/or MIC68xxx family, to keep the output voltages within a certain ΔV on start-up.

  • Input voltage range: 2.9 V to 5.5 V
  • Output voltage adjustable down to 0.7 V
  • Safe start-up into a pre-biased output
  • Full sequencing and tracking capability
  • Efficiency >95% across a broad load range
  • Thermal-shutdown and current-limit protection
  • -40°C to +125°C junction temperature range
  • Output load current up to 2 A
  • 12-pin 3 mm x 3 mm MLF®
  • Power Good output
  • Easy RC compensation
  • 100% maximum duty cycle
  • Ultra-fast transient response
  • Fully-integrated MOSFET switches

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