MIC22405 Buck Regulator

4A integrated switch synchronous buck regulator achieves more than 95% efficiency while still switching at 1 MHz

Image of Micrel's MIC22405 Buck RegulatorThe Microchip MIC22405 is a high efficiency, 4 A integrated switch synchronous buck (step-down) regulator. The MIC22405 is optimized for highest 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 MIC22405 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 ∆V on start-up.

Features
  • Input voltage range: 2.9 V to 5.5 V
  • Output voltage adjustable down to 0.7 V
  • Output load current up to 4 A
  • Safe start-up into a pre-biased output
  • Full sequencing and tracking capability
  • Efficiency > 95% across a broad load range
  • Programmable frequency 300 kHz to 4 MHz
  • Ultra-fast transient response
  • Easy RC compensation
  • 100% maximum duty cycle
  • Fully-integrated MOSFET switches
  • Thermal shutdown and current-limit protection
  • 20-pin 3 mm x 4 mm MLF®
  • -40°C to +125°C junction temperature range

MIC22405 Buck Regulator

ImageManufacturer Part NumberDescriptionFunctionOutput ConfigurationAvailable Quantity
MIC22405YML-TR datasheet linkIC REG BUCK ADJ 4A SYNC 20MLFMIC22405YML-TRIC REG BUCK ADJ 4A SYNC 20MLFStep-DownPositive0MIC22405YML-TR product page link
Published: 2013-07-02