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Manufacturer Part #


MIC23031 Series 4MHz 400mA Sync Buck Regulator w/ HyperLight Load™ Mode - TMLF-6

Product Specification Section
Microchip MIC23031-AYMT-TR - Technical Attributes
Attributes Table
Topology: Buck
Input Voltage: 2.7V to 5.5V
Output Current-Max: 400mA
Output Voltage Range: 0.7V to 3.6V
Output Type: Adjustable
Switching Frequency-Max: 4MHz
Operating Temp Range: -40°C to +125°C
Duty Cycle-Max: 80%
Efficiency: 93%
No. of Outputs: 1
Quiescent Current: 35µA
Storage Temperature Range: -65°C to +150°C
Load Regulation (%): 0.7%
Package Style:  TMLF-6
Mounting Method: Surface Mount
$Features & Applications
The MIC23031-AYMT TR is a high efficiency 4 MHz 400 mA synchronous buck regulator with Hyper Light Load™ mode. Hyper Light Load™ provides very high efficiency at light loads and ultra-fast transient response which is perfectly suited for supplying processor core voltages.

An additional benefit of this proprietary architecture is very low output ripple voltage throughout the entire load range with the use of small output capacitors. The tiny 1.6 mm x 1.6 mm Thin MLF ® package saves precious board space and requires only three external components.The MIC23031 has a very low quiescent current of 21 µA and achieves as high as 88% efficiency at 1 mA. At higher loads, the MIC23031 provides a constant switching frequency around 4 MHz while achieving peak efficiencies up to 93%.


  • Input voltage range: 2.7 V to 5.5 V
  • 400 mA output current
  • Up to 93% efficiency and 88% at 1 mA
  • 21 µA typical quiescent current
  • 4 MHz PWM operation in continuous mode
  • Ultra fast transient response
  • Low voltage output ripple
  • 20 mVpp ripple in Hyper Light Load TM mode
  • 3 mV output voltage ripple in full PWM mode
  • Fully integrated MOSFET switches
  • 0.01 µA shutdown current
  • Thermal shutdown and current limit protection
  • Fixed and adjustable output voltage options available
  • 6-pin 1.6 mm x 1.6 mm Thin MLF ®
  • –40 °C to +125 °C junction temperature range


  • Mobile Handsets
  • Portable Media/MP3 Players
  • Poryable Navigation Devices(GPS)
  • WiFi/WiMax/WiBro Modules
  • Digital Cameras
  • Wireless LAN cards
Pricing Section
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Factory Stock:Factory Stock:
Factory Lead Time:
52 Weeks
Minimum Order:
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